Guardian G25AMK005, G25RMV110 Technical Manual

G25AMK005

G25AMK005

GUARDIAN 110W MOBILE RADIO

TECHNICAL MANUAL

Datron World Communications Inc. 3030 Enterprise Court
Manual Part No. G25AMK005 Vista, CA 92083, USA
Release Date: May 2002 Phone: [phone] Fax: [phone]
Revision: A E-mail: [e-mail]

www.dtwc.com

 2000 Datron World Communications Inc. All Rights Reserved.

GuardianTM Technical Manual for use with the Guardian 110W mobile radio.

This manual, as well as the software described in it, are furnished under license and may only be
used in accordance with the terms of such license. This manual is furnished for informational
use only, is subject to change without notice, and should not be construed as a commitment by
Datron World Communications Inc. Datron assumes no responsibility or liability for any errors
or inaccuracies that may appear in this manual.

Except as permitted by such license, no part of this publication may be reproduced, stored in a
retrieval system, or transmitted, in any form or by any means—electronic, mechanical,
recording, or otherwise—without the prior written permission of Datron World Communications
Inc.

GuardianTM is a trademark of Datron World Communications Inc.

Written and designed at Datron World Communications Inc., 3030 Enterprise Court, Vista,
California 92083 USA.

For defense agencies: Restricted Rights Legend. Use, reproduction, or disclosure is subject to
restrictions set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer
Software clause at 252.227-7013.

For civilian agencies: Restricted Rights Legend. Use, reproduction, or disclosure is subject to
restrictions set forth in subparagraphs (a) through (d) of the commercial Computer Software
Restricted Rights clause at 52.227-19 and the limitations set forth in Datron’s standard
commercial agreement for this software. Unpublished rights reserved under the copyright laws
of the United States.

The warranty is void if an unauthorized dealer opens or attempt maintenance on the radio.

Manual part number: G25AMK005. Specifications are subject to change without notice or
obligation.

This device made under license of one or more of the following US Patents: 5,164,986;
5,146,497; 5,185,795; 4,636,791; 4,590,473; 5,185,796; 5,148,482; 5,271,017; 5377229;
4,833,701; 4,972,460.

TM

The IMBE

voice coding technology embodied in this product is protected by intellectual
property rights including patent rights, copyrights, and trade secrets of Digital Voice Systems,
Inc. The voice coding technology can only be used as part of the North American land mobile
radio communications system for the APCO Project 25. The user of this technology is explicitly
prohibited from attempting to decompile, reverse engineer, or disassemble the Object Code, or in
any other way convert the Object Code into human-readable form.

Made in the USA

GUARDIAN VHF 110W MOBILE i

WARNING! Maintain a distance of at least 3 feet (1 meter) between the antenna
and people.

To satisfy RF exposure compliance, you, as a qualified user of this radio device
must control the exposure conditions of bystanders to ensure the minimum
distance is maintained between the antenna and nearby persons. The operation
of this transmitter must satisfy the requirements of the Occupational/Controlled
Exposure Environment for work-related use. Transmit only when people are at
least the minimum distance from the properly installed, externally mounted
antenna.

This radio is designed for initial setup by authorized technicians using a
computer and the Guardian
or disable many of the radio’s features from user access per user agency
security policy and legal restrictions. All, some, or none of the features and
functions described in this manual may be available to the user. To successfully
operate the radio, it is important to understand how the radio is programmed
prior to issuance by the user agency. Consult authorized agency personnel for
features and functions made available or restricted to the user. FCC licensees
are prohibited by federal law from enabling the radio to directly enter transmit
frequencies using the radio's controls.

NOTICE TO USER

TM

programming software. Programming can enable

NOTICE TO INSTALLATION TECHNICIANS

Use only a manufacturer- or dealer-supplied antenna.

Antenna minimum safe distance: 3 feet (1 meter).

The Federal Communications Commission (FCC) has adopted a safety
standard for human exposure to Radio Frequency (RF) energy that is below
the Occupational Safety and Health Act (OSHA) limits.

Antenna mounting
dealer must be mounted at a location so that during radio transmission
people cannot come closer than the minimum safe distance to the antenna,
i.e., 3 feet (1 meter).

To comply with current FCC RF exposure limits, the antenna must be
installed at or exceeding the minimum safe distance, and in accordance
with the requirements of the antenna manufacturer or supplier.

Base station installation: The antenna should be fixed-mounted on an
outdoor permanent structure. Address RF exposure compliance at the time
of installation.

Antenna substitution
recommended by the manufacturer or radio dealer. You may be exposing
people to harmful RF radiation. Contact your radio dealer or manufacturer
for further instructions.

: The antenna supplied by the manufacturer or radio

: Do not substitute any antenna for the one supplied or

ii GUARDIAN VHF 110W MOBILE

CONTENTS

CHAPTER 1:

GENERAL INFORMATION .................................................................................................1-1

1.1 SCOPE .........................................................................................................................................................1-1

1.2 GENERAL DESCRIPTION ..............................................................................................................................1-1

1.3 PERFORMANCE SPECIFICATIONS ................................................................................................................. 1-1

CHAPTER 2: HARDWARE THEORY OF OPERATION.......................................................................... 2-1

2.1 INTRODUCTION ........................................................................................................................................... 2-1

2.2 SYSTEM SPECIFICATIONS ............................................................................................................................2-1

2.3 SYSTEM BLOCK DIAGRAM.......................................................................................................................... 2-2

2.4 RECM CONTROL HARDWARE THEORY OF OPERATION.............................................................................. 2-4

2.4.1 Control Logic..................................................................................................................................... 2-4

2.4.2 DSP .................................................................................................................................................... 2-7

2.4.3 Flash ROM......................................................................................................................................... 2-7

2.4.4 RAM ..................................................................................................................................................2-7

2.4.5 TCXO................................................................................................................................................. 2-7

2.4.6 FPGA ................................................................................................................................................. 2-8

2.4.7 IF ADC............................................................................................................................................... 2-8

2.4.8 Clock Generation ............................................................................................................................... 2-8

2.4.9 Logic Audio CODEC......................................................................................................................... 2-8

2.4.10 Accessory Connector Interface and Filtering.....................................................................................2-8

2.4.11 Transceiver Interface and Filtering ....................................................................................................2-8

2.4.12 Keypad Interface ................................................................................................................................ 2-8

2.4.13 Audio Interface................................................................................................................................... 2-8

2.4.14 Test Interface...................................................................................................................................... 2-9

2.4.15 LED.................................................................................................................................................... 2-9

2.4.16 RECM Power Consumption............................................................................................................... 2-9

2.5 RECM TRANSCEIVER SECTION .................................................................................................................. 2-9

2.5.1 Interface Section.................................................................................................................................2-9

2.5.2 Receiver Section...............................................................................................................................2-10

2.5.3 Digital/Analog Control.....................................................................................................................2-13

2.5.4 Keypad Microcontroller................................................................................................................... 2-14

2.6 AUDIO AMPLIFIER BOARD ........................................................................................................................ 2-14

2.6.1 Description....................................................................................................................................... 2-14

2.6.2 Power Conditioning ......................................................................................................................... 2-14

2.6.3 Communication with Transceiver ....................................................................................................2-15

2.6.4 Audio Amplifiers ............................................................................................................................. 2-15

2.6.5 Power Levels Detector, Converter, and RF/DC Combiner ..............................................................2-15

2.6.6 PA ON/OFF Control (Bypass Mode)............................................................................................... 2-16

2.6.7 RF Power Indication ........................................................................................................................ 2-16

2.6.8 Audio Board Block Diagram............................................................................................................2-16

2.7 DISPLAY BOARD .......................................................................................................................................2-17

Figure 2-4: Guardian Keypad Board............................................................................................................... 2-17

2.7.1 Control Logic Interface.................................................................................................................... 2-18

2.7.2 Keypad ............................................................................................................................................. 2-18

2.7.3 Switch Interface ............................................................................................................................... 2-18

2.8 FRONT PANEL INTERFACE BOARD ............................................................................................................ 2-18

CHAPTER 3: SOFTWARE THEORY OF OPERATION ........................................................................... 3-1

3.1 FUNCTIONAL SYSTEM OPERATION.............................................................................................................. 3-1

3.1.1 General............................................................................................................................................... 3-1

3.1.2 Guardian Block Diagram ................................................................................................................... 3-1

3.1.3 Architecture........................................................................................................................................ 3-2

3.1.4 Board Identification ........................................................................................................................... 3-2

GUARDIAN VHF 110W MOBILE iii

Self-Test on Power-Up....................................................................................................................... 3-2

3.1.5

3.1.6 Flash Software Upgrades ................................................................................................................... 3-2

3.1.7 Voice Coder/Decoder (VOCODER) .................................................................................................. 3-2

3.2 RADIO CONTROL SOFTWARE ...................................................................................................................... 3-2

3.2.1 Audio Control ....................................................................................................................................3-2

3.2.2 DSP Control Software........................................................................................................................ 3-2

3.2.3 Transceiver Board.............................................................................................................................. 3-3

3.2.4 DC Power Control.............................................................................................................................. 3-5

3.2.5 Monitoring .........................................................................................................................................3-5

3.2.6 Radio Control Drivers ........................................................................................................................3-5

3.3 DIGITAL SIGNAL PROCESSING..................................................................................................................... 3-6

3.3.1 DSP Transmit Chain .......................................................................................................................... 3-6

3.3.2 DSP Receive Chain............................................................................................................................ 3-8

3.3.3 DSP Software................................................................................................................................... 3-11

3.4 KEYPAD MPU SOFTWARE ........................................................................................................................3-11

3.4.1 Overview.......................................................................................................................................... 3-11

3.4.2 General............................................................................................................................................. 3-11

3.4.3 Keypad Scanning ............................................................................................................................. 3-11

3.4.4 Push-to-Talk (PTT) Input................................................................................................................. 3-11

3.4.5 Switch Input..................................................................................................................................... 3-11

3.4.6 LED Output...................................................................................................................................... 3-11

3.4.7 Backlight Control............................................................................................................................. 3-11

3.4.8 Serial Interface................................................................................................................................. 3-11

3.5 DATA INTERFACE...................................................................................................................................... 3-12

3.5.1 CAI Data Interface........................................................................................................................... 3-12

3.5.2 Synchronous Serial Data Interface................................................................................................... 3-12

3.5.3 CAI Data Link Layer .......................................................................................................................3-12

3.5.4 Transmit Physical Link Layer.......................................................................................................... 3-13

3.5.5 Receive Physical Link Layer............................................................................................................3-14

3.5.6 DES Encryption ............................................................................................................................... 3-14

3.5.7 Host Interface................................................................................................................................... 3-15

3.5.8 Flash Interface.................................................................................................................................. 3-15

3.5.9 Paging...............................................................................................................................................3-15

3.5.10 Hardware Control............................................................................................................................. 3-16

3.6 CONTROLLER SOFTWARE.......................................................................................................................... 3-16

3.6.1 Overview.......................................................................................................................................... 3-16

3.6.2 Environment..................................................................................................................................... 3-16

3.6.3 Radio Store....................................................................................................................................... 3-18

3.6.4 Program/Fill/Control Interface......................................................................................................... 3-19

3.7 USER INTERFACE ...................................................................................................................................... 3-20

3.7.1 Display ............................................................................................................................................. 3-20

3.7.2 Optional DTMF Microphone ...........................................................................................................3-20

CHAPTER 4: INSTALLATION, ADJUSTMENT, AND OPERATION ....................................................4-1

4.1 RADIO CONFIGURATION ............................................................................................................................. 4-1

4.1.1 Channels............................................................................................................................................. 4-1

4.1.2 Zones.................................................................................................................................................. 4-1

4.1.3 Banks..................................................................................................................................................4-1

4.2 INSTALLATION AND ADJUSTMENT .............................................................................................................. 4-1

4.2.1 Hardware............................................................................................................................................ 4-1

4.2.2 Software............................................................................................................................................. 4-1

4.3 OPERATING PROCEDURES ...........................................................................................................................4-1

4.3.1 Connect the Power Source ................................................................................................................. 4-1

4.3.2 Connect the Antenna.......................................................................................................................... 4-1

4.3.3 Optional External Speaker ................................................................................................................. 4-1

4.3.4 Radio Programming ...........................................................................................................................4-1

iv GUARDIAN VHF 110W MOBILE

Radio Power Up................................................................................................................................. 4-2

4.3.5

4.3.6 Choose a Channel...............................................................................................................................4-2

4.3.7 Transmit a Voice Message ................................................................................................................. 4-2

4.3.8 Receive a Voice Message...................................................................................................................4-2

4.3.9 Programming and Bypass Mode ........................................................................................................4-2

CHAPTER 5: RADIO SET AND ACCESSORIES ....................................................................................... 5-1

5.1 SYSTEM DESCRIPTION ................................................................................................................................5-1

5.1.1 Mobile Radio......................................................................................................................................5-1

5.1.2 Antenna.............................................................................................................................................. 5-1

5.1.3 Guardian PC Programmer .................................................................................................................. 5-1

5.1.4 Cloning Cable.....................................................................................................................................5-2

5.2 CONTROLS, INDICATORS, AND CONNECTORS ............................................................................................. 5-2

5.2.1 Controls.............................................................................................................................................. 5-2

5.2.2 Indicators............................................................................................................................................ 5-3

5.2.3 Connectors ......................................................................................................................................... 5-4

5.3 TRANSCEIVER CHARACTERISTICS ............................................................................................................... 5-4

5.3.1 Transmitter Characteristics ................................................................................................................ 5-4

5.3.2 Receiver Characteristics..................................................................................................................... 5-5

5.4 COMMUNICATION SECURITY ...................................................................................................................... 5-5

5.4.1 Algorithms ......................................................................................................................................... 5-5

5.4.2 Keyfill ................................................................................................................................................ 5-5

5.4.3 Zeroize ............................................................................................................................................... 5-6

CHAPTER 6: SERVICING THE RADIO......................................................................................................6-1

6.1 GENERAL ....................................................................................................................................................6-1

6.2 SELF-TEST AT POWER UP ........................................................................................................................... 6-1

6.3 CAUTION..................................................................................................................................................... 6-1

CHAPTER 7: TROUBLESHOOTING........................................................................................................... 7-1

7.1 INTRODUCTION ........................................................................................................................................... 7-1

7.2 RADIO FUNCTIONAL TESTS......................................................................................................................... 7-1

7.2.1 Power-On Test ................................................................................................................................... 7-1

7.2.2 Buttons and Switches Test ................................................................................................................. 7-1

7.2.3 Transmit Test ..................................................................................................................................... 7-1

7.2.4 Receive Test....................................................................................................................................... 7-1

7.2.5 Audio Test.......................................................................................................................................... 7-1

CHAPTER 8: DEFINITIONS ......................................................................................................................... 8-1

CHAPTER 9: SIGNAL TONES...................................................................................................................... 9-1

CHAPTER 10: INTERFACE ...............................................................ERROR! BOOKMARK NOT DEFINED.

10.1 ACCESSORY CONNECTOR PINS AND FUNCTIONS....................................................................................... 10-1

CHAPTER 11: SCHEMATICS....................................................................................................................... 11-1

FIGURES

Figure 2-1: Guardian Interconnect Diagram .............................................................................................................2-3

Figure 2-2: Guardian Control Logic .........................................................................................................................2-4

Figure 2-3: RECM Power Supply.............................................................................................................................2-5

Figure 2-4: Guardian Keypad Board....................................................................................................................... 2-17

Figure 3-1: Guardian Block Diagram........................................................................................................................3-1

Figure 3-2: Transmit DSP Chain...............................................................................................................................3-7

Figure 3-3: Receive DSP Chain................................................................................................................................ 3-8

Figure 3-4: Controller Software.............................................................................................................................. 3-16

GUARDIAN VHF 110W MOBILE v

CHAPTER 1: GENERAL INFORMATION

1.1 Scope

This manual provides technical information for the Guardian 110 Watt mobile radio system.. This chapter gives a
general description and provides a system block diagram. Chapters 2 and 3 provided detailed theory of operation for
hardware and software portions of the radio. Chapter 4 provides general operation of the radio. Chapter 5 is the
physical description of the radio components and the available accessories. Chapters 6 and 7 describe servicing,
testing, and troubleshooting the radio system. The remaining chapters provide additional technical information and
schematics.

1.2 General Description

The Guardian 110W mobile radio system is compliant with the APCO project 25 FDMA common air interface, and
is also compatible with conventional wideband FM systems and newer narrowband FM systems. It provides fully
digital encrypted communication suitable for use by modern public safety and commercial users. The radio system is
built from a remote power amplifier and a control head. The 110W RF power amplifier mounts in a remote location
such as a vehicle trunk, while the control unit is mounted in the cabin. The two are connected by a single coaxial
cable. The cable carries both the RF signal and control signals (PTT, and power level setting).

1.3 Performance Specifications

Model Designation Guardian VHF Mobile Radio

General Model G25RMV110

Frequency Range 136.000 to 174.000 MHz

Banks, Zones, Channels, Shadow 4 banks, 16 zones, 256 channels, 7 shadow

Voice Digital Mode Voice Coding

Frame Re-sync Interval

Error Correction Method

Input Voltage 13.6 Vdc, negative chassis ground

Current Drain @ 13.8V: Standby

Receive @ Rated Audio

Transmit @ Rated Power

Mounting Dashboard mounted, including bracket

Dimensions 2.75” x 7.1” x 5.5” (H x W x D)

Weight
Control Head
Remote Unit

Case Metal and plastic

Temperature Range -30° to +60°C

Channel Spacing 12.5 and 25 kHz, selectable in 2.5 or

IMBE™ 4.4 kb

180 msec

RS, golay, hamming

0.5A

3.0A

28.0A

2.5 lb
12 lb

3.125 kHz steps

FCC Type Acceptance Number Pending

Industry Canada Pending

GUARDIAN VHF 110W MOBILE 1-1

Model Designation Guardian VHF Mobile Radio

Receiver

Sensitivity Digital Mode: 5% BER

(Measurements per TIA/EIA 603 Standards)

-116 dBm or greater

Analog Mode: 12 dB SINAD

Spurious -70 dB

Intermodulation -70 dB

Audio Output Power 10W, 4Ω external, 5W, 8Ω internal speaker

Audio Distortion (at 1000 Hz) 3%

Frequency Stability (-30° to 60°C) ± 1 ppm

Maximum Frequency Separation Full-band split

Transmitter

(Measurements per TIA/EIA 603 Standards)

RF Power Output 25W to 110W, adjustable

Spurious and Harmonic Emissions -70 dB

FM Hum and Noise (wideband) -46 dB @ 25 kHz/-40 dB @ 12.5 kHz

FCC Modulation Designators 16K0F3E, 11K0F3E, 20K0F1E

Audio Distortion (at 1000 Hz) 2%

Audio Response (1000 Hz Ref.) ± 3 dB, 300 to 3000 (EIA/TIA 603)

Frequency Stability (-30°C to 60°C) ± 2.5 ppm

Maximum Frequency Separation Full bandwidth

Environment Specifications (MIL-SPEC)

Environment 810C 810D 810E

Method Procedure Method Procedure Method Procedure

Low Pressure 500.1 I 500.2 I 500.3 II

High Temp. 501.1 I, II 501.2 I, II 501.3 I, II

Low Temp. 502.1 I 502.2 I 502.3 I

Temp. Shock 503.1 I 503.2 I 503.3 I

Solar Radiation 505.1 I 505.2 I 505.3 I

Humidity 507.1 II 507.2 II (5) 507.3 II (5)

Salt Fog 509.1 I 509.2 I 509.3 I

Dust and Sand 510.1 I 510.2 I 510.3 I, II

Vibration 514.2 VII(W) 514.3 I (1) 514.4 I (1)

Shock 516.2 I, II, V 516.3 I 516.4 I

1-2 GUARDIAN VHF 110W MOBILE

CHAPTER 2: HARDWARE THEORY OF OPERATION

2.1 Introduction

The Control Module contains the Receiver Exciter Control Module (RECM), Audio amplifier
board, Interface board, and display and keypad assemblies. The RECM is a shielded assembly
containing the transceiver and all control and signal processing hardware and firmware, except
the RF and audio power amplifiers. The trunk-mounted RF power amplifier contains a single PC
assembly.

Schematics for all the boards are located in the back of the manual.

2.2 System Specifications

Table 2-1: Guardian G25RMV110 Technical Specifications

Specification Description
General

Frequency Range 136.000 to 174.0000 MHz
Banks, Zones, Channels, Shadow 4 banks, 16 zones, 256 channels, 7 shadow
Voice Digital
Mode Voice Coding
Frame Re-sync Interval 180 msec
Error Correction Method RS, golay, hamming
Mounting Under dashboard using bracket
Dimensions 2.94”x7.13”x7.06” (H x W x D)
Weight 5 lbs. Approximately
Case Metal and plastic
Temperature Range
Channel Spacing 12.5 and 25 kHz, selectable in 2.5 or 3.125 kHz steps
FCC Type Acceptance Number Pending
Industry Canada Pending
Receiver (Measurements per TIA/EIA 603 Standards)
Sensitivity
Digital Mode: 5% BER
Analog Mode: 12 dB SINAD
Spurious -70 dB
Intermodulation -70 dB
Audio Output Power 5W internal, 10W external speaker
Audio Distortion (at 1000 Hz) 5%

Frequency Stability (-30° to +60°C) ±2.5 ppm

Maximum Frequency Separation Full-band split

Transmitter (Measurements per TIA/EIA 603 Standards)

Duty Cycle 3%, 3 min continuous
RF Power Output 25W, 50W, 110W; also bypass mode
Spurious and Harmonic Emissions -70 dB
FM Hum and Noise (wide/narrowband) -48/-47 dB typical
FCC Modulation Designators 11K0F3E, 16K0F3E, 22K0F3E, 14K6F1E
Audio Distortion (at 1000 Hz) 5%
Audio Response (1000 Hz Ref.)

Frequency Stability (-30° to +60°C) ±2.5 ppm

IMBE 4.4 kb

-30° to +60°C

-116 dBm maximum

±3 dB 300 to 3000 (EIA/TIA 603)

GUARDIAN VHF 110W MOBILE 2-1

Specification Description

Maximum Frequency Separation Full bandwidth

DES Encryption

Encryption Keys 16
Code Key Generator External
SBCF Analog DES Encryption Standard feature

Environmental Specifications MIL-STD-810F

Test Method/Procedure
Low Pressure (Altitude) 500.4/II
High Temperature 501.4/I, II
Low Temperature 502.4/I
Temperature Shock 503.4/I
Solar Radiation (Sunshine) 505.4/I
Humidity 507.4/I
Salt Fog 509.4/I
Sand and Dust 510.4/I, II
Vibration 514.5/I
Shock 516.5/I

Standard Accessories Optional Accessories

5W Internal Speaker 10W External Speaker
Palm Microphone DTMF Microphone
Mounting Bracket Key Variable Loader
14 ft Power Cable 25 ft Power Cable

2.3 System Block Diagram

2-2 GUARDIAN VHF 110W MOBILE

Ignition and Emergency Switch

Fused DC Power

Speaker out

System Control and

Programming

Coax

Control

Cable

PA

control

DTMF

control

MIC

connector

DB9

(LCD,Keypad and switches)

Control Head

Power ON/OFF and R/T

switches

Control

DB25

RECM

Front panel interface

Fused DC Cable

DC

connector

R

GUARDIAN VHF 110W MOBILE 2-3

AMP

AMP

Filter&

combiner

T

Power
spliter

T

R

output power

control monitor

power sensor

Mounted Power Amplifier

Figure 2-1: Interconnect Block Diagram

Antenna ConnectionIn/Out

2.4 RECM Control Hardware Theory of Operation

2.4.1 Control Logic

The control logic interfaces to the keypad logic, transceiver, internal audio, and Motherboard. The control logic
implements the main radio control function and all the baseband signal processing.

Keypad Board and Front Panel Interface

DB25 Accessory Connector

TCVR Module

Grey areas connect

through the 80-pin

connector on the

Motherboard.

2.4.1.1 Power Supply Unit

This block of circuitry takes the 7.8V regulated voltage together with a number of control signals to generate a
number of power supply outputs.

2-4 GUARDIAN VHF 110W MOBILE

Power Supply

Figure 2-2: Guardian Control Logic

2.4.1.2 On/Off Switching

The main continuous supply 10V control is passed through a front panel on/off switch to generate 10V SW from the
main radio supply. In normal operation the on/off switching is controlled by the radio on/off rotary switch by the
control /RADON. Once switched on the main controller can hold the radio on by setting PWRHOLD. In addition
to the radio rotary on/off switch, the on/off switching can be controlled by the external line /RADOFF via the
accessory connector. This line overrides the /RADON line and can be used to force the radio off regardless of the
rotary switch setting. However, the H8 controller uses the PWRHOLD and PWROFF lines to implement a clean
controlled switch off.

2.4.1.3 Transmit Power Switching

A single FET switch controlled by CTX is used to provide a switched 10VTX high-current supply (1.5A) for the
transmitter.

2.4.1.4 4.5V Switch Mode Power Supply

This circuit uses a switch mode power supply device to generate a 4.5V supply at 450 mA maximum for the radio
logic. The switch mode device is synchronous and uses an externally provided power supply clock at 384 kHz. The
power supply circuit includes input and output filters to limit the conduction of the fundamental switching
components and their harmonics in the VHF band, both onwards into the logic and back into the power supply.

GUARDIAN VHF 110W MOBILE 2-5

Figure 2-3: RECM Power Supply

2.4.1.5 3.3V Linear Logic Supply

The output from the 4.5V switch mode power supply is passed through 3.3V linear power supplies to remove any
remaining power supply switching noise on the main logic supply. One 3.3V supply is used for control logic, the
other 3.3V, 50 mA supply is used for control logic analog circuitry.

2.4.1.6 Reset Generator

This circuit uses a MPU supervisory device (MAX825) to generate a reset pulse of at least 140 ms whenever the

3.3V logic supply drops below 3.08V. The circuit also generates a reset signal when the watchdog input is asserted
by H8 or DSP.

2.4.1.7 5V Linear Logic Supply

This circuit generates a 5V logic supply at 50 mA maximum for use on the control logic.

2.4.1.8 Audio Supplies

Two linear regulators providing clean filtered supplies for the audio at 5V are provided. The audio power amplifiers
use the 5V, 800 mA audio supply. The audio supply is used for the low-current microphone amplifier. A linear 5V
bias supply to the internal microphone is also provided.

2.4.1.9 H8 Microcontroller

H8 is the main controller for the radio and is a HD6433044 ROM-less microcontroller. H8 is configured with an
expanded bus connected to the Flash, RAM, and DSP. The H8 integral bus arbitration logic allows H8 and DSP to
both have access to the Flash and RAM. H8 is clocked by the external TCXO.

H8 is powered from the 3.3V logic supply, and reset by the hardware /RES line. A watchdog output to the hardware­reset circuitry is provided. H8 generates chip select outputs to allow the Flash, RAM, FPGA, and DSP host port to
be separately addressed.

One serial port of H8 is used to implement a bidirectional synchronous serial interface to the keypad board. This
interface is used to communicate with the keypad MPU and directly load the LCD controller. The clock on this
interface runs at 100 kHz. An associated interrupt input to H8 is used to initiate transfers from the keypad to H8.
This serial interface is also used to load the output expander in the FPGA, and also to configure the FPGA.

One serial port of H8 is used to implement a bidirectional asynchronous serial interface to an external PC used for
programming, filling, and controlling the radio. This interface uses programmable standard baud rates (default 9600
baud) and standard data formats. There are no handshaking parallel lines associated with this interface. Two parallel
I/O lines on H8 are used to generate an I

2

C interface to allow the EEPROM on the transceiver to be accessed. Four
parallel output lines on H8 are used to generate a synchronous serial output bus with clock and data and separate
strobe lines for the DAC, control shift register, and synthesizer on the transceiver.

One H8 DAC output is used to generate simple audio tones of varying volume for use as audio alerts. The second
H8 DAC output is available for VCTCXOP control. The six-channel ADC is used to measure: the raw supply
voltage, WRU radio input, reference crystal temperature, PA temperature, PA current, and RSSI. Two I/O lines are
used to implement software UART, used for debug outputs in the development environment.

2.4.1.10 H8 Input Requirements

The total requirements for parallel input signals to H8, which need to be polled on a regular basis are:

 OOL: Out-of-lock (OOL) signal from the transceiver synthesizer
 EXT PTT: External PTT
 PWROFF: On/off switch position
 CONFDONE: Configuration status of FPGA

2.4.1.11 H8 Output Requirements

The total requirements for parallel output signals from H8, which need to be controlled are as below. A serial load
output latch in the FPGA expands the output capabilities of H8.

2-6 GUARDIAN VHF 110W MOBILE

 LCDA0: LCD controller A0 command/ data select
 LCDCS: LCD chip select
 SCL: I

2

C and synthesizer clock

 DACSDA: Transceiver serial data, synthesizer, DAC, S-R
 SYNTHENA: Synthesizer framing pulse
 DACENA: DAC framing pulse
 SRENA: S-R framing pulse
 /DINT: Interrupt to DSP from H8
 /RESO: Watchdog output from H8

2.4.1.12 H8 Input/Output Requirements

The total requirements for parallel input/output signals on H8, which need to be read and controlled are:

 BATBUS: Not used in the mobile configurations
 SDA: I

2

C data

2.4.1.13 H8 Input Interrupt Requirements

The total requirements for parallel input interrupt signals on H8 are:

 LBOUT: Not used in the mobile configuration
 DSPINT DSP: Interrupt

2.4.2 DSP

The DSP56309 (or DSP56302) processor implements all baseband signal-processing functions in the radio. It
interfaces with the transceiver through one ESSI port, to the user for voice through the second ESSI port. The DSP
function is controlled by H8 through the DSP host port. The DSP has direct access to the main Flash memory
through the bus arbitration logic in H8, this allows it to download program images. The initial power-on code
download is through the host port. The hardware-reset line resets the DSP. The TCXO clock output line clocks the
DSP at 12.288 MHz. The DSP ESSI 1 port is used to provide a synchronous interface to the IF ADC and the
transceiver 12-bit DAC. In receive modes that interface is capable of writing to the DAC at 48 ksps while still
reading the ADC at 96 ksps. The DSP ESSI “0” port is used to provide a full-duplex synchronous interface to the
audio CODEC using 8 kHz sampling rate and 13 bit samples. The data transfer is at 2.048 MHz using a DSP
sourced clock and framing pulse.

2.4.3 Flash ROM

A 512k x16 Flash ROM is used as the main program store for the H8 controller and DSP. The Flash ROM uses a
protected boot sector that is factory programmed via the DSP JTAG port. Normal reprogramming is implemented
by running H8 from the boot sector and using 3V, programming the bulk of the device. The Flash is used to provide
a parameter storage area for nonvolatile data storage of frequencies and keys, etc. This storage area is capable of in
excess of 100k write cycles.

2.4.4 RAM

A 128k x 8 static RAM is used for temporary storage of data by the H8 controller. This RAM is powered by a
continuous supply that maintains its contents as long as a power source is present. Additionally the RAM has a
backup capacitor to retain its contents over power interruptions.

2.4.5 TCXO

This oscillator serves as the reference for all logic and power supply clocks within the control logic and keypad. It
provides the data rate clocks for radio operation, and is the source of the ADC/DAC/CODEC conversion clocks. The
TCXO is at 12.288 MHz, with a temperature tolerance of +
a typical temperature tolerance of ± 1.0 ppm, a trimmer to set the initial frequency is provided. A Schmitt trigger
buffer squares up the TCXO sine wave output before being output to H8 and DSP.

GUARDIAN VHF 110W MOBILE 2-7

2.5 ppm. Additional calibration is performed to provide

2.4.6 FPGA

The control logic uses an Altera 8282 FPGA device to provide a flexible serial data routing function, I/O expansion
for H8 and DSP, clock generation, data multiplexing, and to absorb discrete logic functions.

The synchronous serial bus routing function involves routing the synchronous serial port of H8 either to the keypad
and LCD, or to the I/O expansion in the FPGA. High-order address pins from H8 control this routing and a FPGA
dummy write with dedicated FPGA chip select from H8. The FPGA includes a serial load parallel output shift
register that is used for parallel output expansion for H8.

The discrete logic functions of the FPGA, includes logic to control an inverter for one of the LCD control outputs.
The data multiplexing function involves rerouting serial pins between the accessory connector and the DSP SCI port
to allow data transmission and keyfill operations.

2.4.6.1 FPGA Configuration

The FPGA is configured at start-up from the main Flash memory using a serial load from H8. During configuration
outputs are tri-stated and pulled to a safe level by committing resistors to prevent audio and RF bursts at power up.

2.4.7 IF ADC

The IF sampling ADC is a 12-bit ADC capable of sub-sampling a 455 kHz, IF signal at 96 kHz sampling rate. It is
connected by a serial interface to the DSP ESSI port 1. The serial data interface is clocked at 1536 kHz.

2.4.8 Clock Generation

The clock generation logic is used to generate clocks for the synchronous power supplies, the ADC serial interface,
and the keypad microcontroller. The clock generator logic is implemented in the FPGA.

2.4.9 Logic Audio CODEC

The audio CODEC is an integrated ADC/DAC and audio filter device capable of full-duplex operation on voice
bandwidth signals at 8 ksps. The samples have a resolution of 13-bits linear. The CODEC is connected to the DSP
ESSI port “0” with serial data transfer rate of 2.048 MHz. The CODEC is continuously powered from the 3V logic
and 3V audio supplies. DSP parallel control lines are used to mute the input and output sections as required.

2.4.10 Accessory Connector Interface and Filtering

All outputs are filtered to limit their bandwidth to the minimum and current limited to protect them from output
short circuits to ground or up to 16V. All inputs are filtered and protected from continuous application of ground or
+16V. There is no protection against negative applied voltages. Inputs and outputs are protected from static
discharge of at least 10 kV air discharge. All inputs and outputs incorporate RF bypass filter capacitors adjacent to
the connector, except for ground.

2.4.11 Transceiver Interface and Filtering

Most of the signals crossing the interface are filtered to limit their bandwidth to the minimum consistent with correct
operation. Outputs from the control are filtered with series resistors on the RECM and grounded capacitors on the
transceiver adjacent to the connector. Outputs from the transceiver to the control use the reverse configuration.

2.4.12 Keypad Interface

Some filtering is provided on this interface, but all outputs are protected from short circuits by series resistors.
Where possible, inputs are also protected from damage by series resistors.

2.4.13 Audio Interface

The audio interface is implemented with four-way wire connectors directly via the 80-pin interface through the
Motherboard to the integral speaker and microphone.

2-8 GUARDIAN VHF 110W MOBILE

2.4.14 Test Interface

The test interface provides the following functions:

 Joint test action group (JTAG) connector access for board test and Flash boot sector programming
 Board reset and control access
 Board power supply and on-off switching access
 H8 serial debug port access

2.4.15 LED

The control logic incorporates a 3-color LED used for status information. It is controlled by the FPGA to show red,
green, or off. It is optically coupled to the top face of the radio by a light pipe. The hardware is configured so
during hardware reset, before the keypad MPU software is running, the LEDs are off.

2.4.16 RECM Power Consumption

The control logic operates at input voltage 7.7V. The average current consumption of the control logic is:

 Standby mode: 60 mA
 Receive mode @ 500 mW: 330 mA
 Transmit mode @ 2W: 1,000 mA
 Transmit mode @ 5W: 1,500 mA

2.5 RECM Transceiver

RF shields covers the board.

2.5.1 Interface

J2 is the transceiver antenna connector. RF signals are transmitted and received through this surface mount RF
connector. Transmitted and received RF signals are routed from this connector through a short RF cable to the
RX/TX relay on the Motherboard.

2.5.1.1 Transmit Chain

The pre-driver amplifier (Q7, etc.) amplifies the TXLO signal from the synthesizer section. The Q7 output power is
typically 13 dBm measured at C77/R44/R49 node.

R44, R49, and R52 are part of a 3 dB pie attenuator network. The gain control is made up of CR5, CR6, and
associated components. This circuit yields more than 50 dB of useful attenuation range. The circuit is part of a
DAC controlled closed loop system, in conjunction with the detector/power control circuit (U12, U13, and
associated components), which controls the transmitter output power level. The power amplifier (PA) is a
Mitsubishi M68776, 7.2V, 6W gained controlled power amplifier.

The harmonic filter (C209, L30, C81, C82, L31, C83, and C84) attenuates harmonics created by the power
amplifier. The harmonic filter insertion loss is 0.4 dB typically at 174 MHz. The output of the harmonic filter
connects to the 20 dB coupler (U12). This coupler is part of a DAC-controlled closed loop system designed to set
the transmitter output power level. The insertion loss through the coupler (U12-1 to U12-3) is 0.2 dB typically.

2.5.1.2 Power Amplifier Control

Transmit output power level is controlled by the detector/power control circuit and the gain control amplifier input
via VCONTROL. This closed loop system is designed to keep the transmitter output power constant over variations
in temperature, transmitter supply voltage (7.5VT), and RF power levels into the transmit chain. The detector/power
control circuit is made up of the 20 dB coupler (U12), an RF rectifier circuit (CR11, CR12, etc.), and an integrator
(U13). The DAC line labeled PWRSET at the non-inverting input of U13 sets the transmitter to the desired power
level. U12-2 samples the transmit signal. The sampled RF signal is rectified by the temperature stable circuitry of
CR11, CR12, etc, and is routed to the inverting input of the integrator at U13-4. The output of the integrator at U13­1, labeled VCONTROL, controls the gain of the power amplifier. Any change in transmitter output power level is
automatically corrected by the loop.

GUARDIAN VHF 110W MOBILE 2-9

2.5.1.3 PIN Diode Switch

The antenna PIN diode switch is made up of CR7, CR8, CR9, CR10, and other associated components. This switch
is a four-port design. The four ports are antenna 1 (TOP RF), antenna 2 (SIDE RF), receive, and transmit. Receive
and transmit ports can be switched to only one of the two antenna ports. Transmit signals are routed from the
transmit/receive PIN diode switch (to be discussed in the following paragraph) to the antenna port. The receive
signal is routed from the selected antenna port to the transmit/receive PIN diode switch. The antenna PIN diode
switch and receiver circuits share current in the receive mode of operation via the signal labeled RXSINK at Q11,
pin 3. The insertion loss through the antenna pin switch is 0.2 dB typically.

The transmit/receive PIN diode switch is made up of C6, L60, L38, L40, L39, D9, D7, D10, C97, C98, C104, C105,
C106, C107, and other associated components. C127, C114, L42, and C115 are the 1/4 wave simulator circuit. The
1/4 wave simulator is critical to the design of the switch. In the transmit mode of operation CR13 and CR14 are
forward biased. C116 resonates with the internal series inductance of CR14 at 155 MHz and the receive port (RX
INPUT) is RF shorted to ground. With the receive port RF shorted to ground; the parallel combination of C127,
C114, and L42 forms a tank circuit resonating at 155 MHz. Consequently, the receive port appears as an open
circuit to the transmit signal and is routed to the antenna PIN diode switch. In the receive mode of operation, CR13
and CR14 are biased off so C114/L42/C115 appears as a low-pass filter (LPF) to signals at the antenna port of the
switch. The insertion loss through the transmit/receive PIN diode switch is 0.4 dB in the transmit mode and 0.2 dB
in the receive mode typically.

Q10 to Q19 and associated components are switching transistors used to control the antenna and transmit/ receive
PIN diode switches. The current flowing through the entire PIN diode circuit is approximately 45 mA in the
transmit mode of operation. In the receive mode of operation the transmit/receive PIN diode switch is disabled, and
nominal 85 mA flows through the antenna PIN diode switch.

2.5.2 Receiver

The VHF signal enters into the RX INPUT via the PIN diode switch (discussed previously). D1 and D2 are
Schottky protection diodes to protect the front-end circuitry from RF overloads that could occur if the PIN diode
switch failed to work properly or if a transmitter is very close to a receiver. Typical insertion loss is 0.1 dB for the
protection diodes. L25/C61 form a band-stop filter (BSF) at the first IF frequency of 45 MHz. Typical insertion
loss for the BSF is 15 dB at 45 MHz but less than 0.1 dB in the VHF band.

L14, L6, CR3, CR4, L7, CR27, CR28, L8, and L15 make up the very high frequency (VHF) preselector band-pass
filter (BPF). The BPF is inductively coupled for improved high-side attenuation. This filter provides attenuation to
spurious signals such as the first image and the half-IF. The BPF is varactor diode tuned by DAC line RXVTF.
Typical insertion loss (138 to 174 MHz) is 1 dB for the VHF BPF.

The RF amplifier (Q1, T1, etc.) utilizes loss-less feedback to deliver reasonable gain, low-noise figure, and a high
third order intercept point simultaneously. Typical gain (136 to 174 MHz) is 11.5 dB for the RF amplifier.

C14, L1, C9, C15, L2, C10, C16, L3, C11, C17, and L9 form a VHF LPF. This filter provides additional RX
spurious attenuation as well as image noise attenuation. L4, C12, L16, C25, L5, and C13 form a BSF at the first IF
frequency of 45 MHz. The insertion loss is 1.0 to 2.0 dB (136 to 174 MHz) typically for the cascade. The IF BSF
insertion loss is typically 40 dB at 45 MHz, but less than 0.3 dB in the VHF band.

U1 is a double-balanced mixer (DBM). U1 converts the desired RF signal down to the first IF of 45 MHz. High­side local oscillator (LO) injection is used. Therefore, the LO is 45 MHz higher than the receiver tuned frequency.
The LO drive level is +10 dBm nominal at U1, pin 1. The conversion loss of the mixer (RF to IF) is 5.5 dB
typically.

The LO signal is generated in the synthesizer section (to be discussed later). The LO signal is designated RXLO on
the schematic diagram. The LO signal is routed to a LPF consisting of C31, L21, C87, C30, L20, C75, and C28.
L19 and C28 are also used to impedance match the LO port of the mixer. The insertion loss of the VHF LO LPF is

0.3 dB typically at 174 MHz.

R4, L17, C6, L10, R5, and C23 make up the diplexer network. This network properly terminates the DBM both in
and out of band. The diplexer also provides some additional half-IF spurious rejection. The diplexer insertion loss
is 0.8 dB typically at 45 MHz.

2-10 GUARDIAN VHF 110W MOBILE

There are two 45 MHz IF amplifier circuits. The first (Q2, T2, etc.) utilizes loss-less feedback to deliver reasonable
gain, low-noise figure, and a high third order intercept point simultaneously. Typical gain is 10.5 dB for the first IF
amplifier.

There are two crystal BPFs and a second 45 MHz IF amplifier. The BPFs provide attenuation for the adjacent and
alternate channels, and also for the second image response. FL1 is a four-pole crystal filter with a 20 kHz
bandwidth centered at 45 MHz. FL4 is a two-pole crystal filter with a 30 kHz bandwidth centered at 45 MHz. The
second 45 MHz IF amplifier provides high gain to prevent further degradation of receive sensitivity. C57, L12,
C18, C19, and L13 are impedance matching elements for the input of FL1. The output of FL1 is impedance
matched to the second 45-MHz IF amplifier (Q36, etc.) by C285, L64, and C242.

The output of the second 45-MHz IF amplifier is impedance matched to FL4 by C287, L61, C286, C237, L60, and
C235. The entire cascade provides 21 dB of gain and has a 3 dB bandwidth of 20 kHz typically. Typical insertion
loss is 1.5 dB for each crystal BPF.

The IF IC (U28) contains the second mixer and an IF amplifier chain. The 45 MHz IF signal enters U28 at pin 6
from the crystal BPF (FL4). FL4 is impedance matched to the IF IC input by C294, L62, and C288. The incoming
45 MHz IF signal is mixed with the second LO (to be discussed later). The second mixer IF output is at U28, pin 8
and the second IF frequency is 455 kHz.

The signal from U28-8 is routed to FL3. FL3 is a ceramic BPF operating at 455 kHz. The insertion loss of the
ceramic BPF is 6 dB typically in a 1500-ohm system.

The 455 kHz IF signal enters U28-10, is amplified by a cascade of IF amplifiers, and exits at U28-14. The signal
from U28-14 then enters a second ceramic BPF, FL2. FL2 is the final ceramic BPF with a typical insertion loss of 8
dB in a 1000-ohm system. The 455 kHz IF signal enters its final stage of amplification at U29-3. U29 is configured
as a non-inverting operational amplifier and is capable of driving a 50-ohm load. The amplifier is set for a voltage
gain of 2.5. With the receiver set to full gain the signal level at J4 (455 kHz IF OUT MONITOR) is -20 dBm "3 dB
into 50 ohm with a -119 dBm unmodulated 136 MHz signal injected at J2 (TOP RF) or J3 (SIDE RF). The second
LO consists of CR26, R33, Y1, L24, C59, C226, C227, and Q35. The oscillator is a Colpitts type with the crystal
operating in the series mode. CR24 is a varactor diode used to set the oscillator on frequency using the DAC output
labeled 2

nd

LO. The second LO operating frequency is 44.545 MHz (low-side injection). L65 and C223 impedance
match the output of Q35 to the LPF (C289, C293, L63, and C284). The signal is attenuated by R282, R283, and
R284 and sent on to the second mixer. The signal level at U28-4 is -16 dBm nominal.

U4 is a voltage regulator used to power the receiver circuits. The dc voltage appearing at U4, pin 1, labeled
RXSINK on the schematic diagram, is routed from the antenna PIN diode switch. As previously discussed, the PIN
diode switch and the receiver circuits share current to reduce receive power consumption. The control line +3.3V
RXEN is used to enable the regulator while the transceiver is in the receive mode of operation. The regulator is
disabled during the transmit mode of operation.

2.5.2.1 Synthesizer and Reference Oscillator

U19 is a fractional-N synthesizer IC programmed for a specific frequency by loading appropriate serial data into the
IC. It controls the receive VCO when the transceiver is in the receive mode of operation, and the transmit VCO
when in the transmit mode. The programming lines are labeled 3VSCL, 3VSDA and 3VSYNTHENA on the
schematic diagram. These are all CMOS logic level inputs. R118 (RF) and R123 (RN) are the fractional
compensation and phase detector current setting resistors, respectively. These resistors are critical to the operation
of the synthesizer system and must be checked when troubleshooting around U19. The phase detector output pins
(U19-13 and U19-14) are fed to the passive loop filter (R140, C177, C172, R134, and C173) and on to the VCO
control varactor diodes (CR17/CR19) for frequency control. The buffered, filtered output from the VCO is fed into
U19-5 (RF IN) to close the phase-locked-loop. The level is typically -10 dBm into U19-5. The reference oscillator
is made up of CR22, Y2, Q28, C197, and C198 and associated components. The reference oscillator operates at

12.8 MHz. The reference oscillator operating frequency is adjusted by varying the dc voltage at the DAC controlled
line that is labeled REFOSCMOD. This line is also used to modulate the reference oscillator during the
transceiver’s transmit mode of operation. The 12.8 MHz signal is fed into the synthesizer chip at U19-8 (REF IN)
using a coupling capacitor, C194. The AC signal level at U19-8 is 1V p-p typically.

GUARDIAN VHF 110W MOBILE 2-11

U22 is the reference oscillator temperature sensor used to monitor the temperature near Y2. Its output is labeled
XTALTEMP on the schematic diagram. This line is normally monitored by the microprocessor so the reference
oscillator can be adjusted for drift due to changes in temperature.

2.5.2.2 Receive/Transmit VCOs and Buffer Amplifiers

The receive VCO operates from 181 to 219 MHz since high side LO injection is used and the first IF is
45 MHz. The transmit VCO operates from 136 to 174 MHz. Each VCO is a Colpitts type design utilizing a low
noise, bipolar transistor as the active device. The receive VCO uses Q24 and the transmit VCO uses Q21, each in
the common collector configuration. The Colpitts capacitors are C169/C180 (receive VCO), and C137/C142
(transmit VCO). These capacitors enable Q24 to oscillate in the 181 to 219 MHz frequency range and Q21 to
oscillate in the 136 to 174 MHz frequency range. L53 is the resonating inductor for the receive VCO and L45/L46
are the resonating inductors for the transmit VCO. CR20/CR21, and CR16/CR18 are the coarse tuning varactor
diodes for the receive and transmit VCO respectively. These diodes are used to coarse tune the VCO such that the
LPF, phase detector output voltage (from U19) at TP10 equals 1.65 Vdc. The receive and transmit VCOs share the
coarse tuning DAC controlled line labeled CTUNE. Coarse tune dc voltage swings from nominal 1.8 to 22 Vdc.
CR19 (receive VCO) and CR17 (transmit VCO) are the fine-tuning varactor diodes controlled by U19 as was
explained previously. CR15 is the modulation varactor diode for the transmit VCO. The output from the receive
VCO is coupled off Q24-E using C174. The output from the transmit VCO is coupled off Q21-E using C139. The
signal is measured at the C174/R146 node (receive) and the C139/R107 node (transmit), and measures -15 dBm
typically.

Q26 and Q22, and associated components, form the first VCO receive and transmit buffer amplifiers respectively.
These amplifiers buffer the VCO output from changing-output voltage standing wave ratios (VSWR) that could pull
the VCO off frequency. The output from each measures -5 dBm typically. The buffer is measured at the
C170/R141 node (receive) and the C138/R131 node (transmit). Q25 is the second buffer amplifier. This amplifier is
common to both the receive and the transmit VCOs. R131, R141, and R142 are the combining elements used to
make this possible. This buffer outputs a signal large enough, after subsequent attenuation and filtering, to properly
drive the RF IN pin of the synthesizer (U19-5). The output from this buffer is measured at the C167/C53/L52/C175
node and measures 0 dBm typically.

The output from the Q25 buffer is filtered by C175, C53, L52, and C176. This LPF prevents the synthesizer IC
(U19) from locking on to harmonics of the desired frequency. The insertion loss of the LPF is 0.4 dB typically.

The signal is then split by R138, R139, and R144, and sent on to the appropriate receive or transmit final buffer
amplifier. The signal measured at R139/C150/ C186 node is -6 dBm, and the signal measured at R144/R143/C168
node is -6 dBm.

Q23 (receive) and Q27 (transmit) is the final buffer amplifier. Q23 amplifies the signal up to the level needed to
properly drive the LO port of the DBM (discussed previously). Q27 amplifies the signal up to the level needed to
properly drive the PA pre-driver (previously discussed). The signal measured at RXLO is +7 dBm typically. The
signal measured at TXLO is +7 dBm typically.

U17, Q20, etc. form the voltage regulator for the receive and transmit VCO/buffer amplifiers. R67, C124, and Q20
form a super filter, which attenuates voltage regulator noise that may otherwise degrade the synthesizer phase noise
performance.

U20, U21, Q29, Q30, CR23, CR24, CR35, C199, C202, C203, etc. create a voltage multiplier. The circuit is
configured as a voltage quadrupler. Circuit losses and output loading lowers the voltage down from 24 Vdc to about
22 Vdc. The driver circuit (U21) switches at about 192 kHz. This frequency was selected so harmonics would not
land at or near the second IF frequency of 455 kHz. The 22 Vdc supply is used to power the DAC supporting quad
op-amp U18.

The shift register (U24) is used to control transceiver modes of operation and functions. The line labeled STD/SIDE
selects the desired antenna port of the transceiver. The line labeled TX/RX selects either the transmit or receive
mode of operation. +3.3V RXEN turns the receiver on and off (previously discussed). Q34/Q32 and Q33/Q31
enable and disable the receive and transmit VCOs and buffers respectively (discussed previously). U16 is the
voltage regulator that supplies all 5V digital circuitry on the transceiver.

2-12 GUARDIAN VHF 110W MOBILE

2.5.3 Digital/Analog Control

Digital/analog control is shown on page 1 of the RECM schematic. The transceiver is fitted with an EEPROM
(U15). The IC is used to store calibration and curve fit data, which is needed when the transceiver is configured
with the Guardian radio. Each transceiver has its calibration and curve fit data stored within the EEPROM. The
calibration and curve fit data is written to the EEPROM at the successful conclusion of level 2 testing. Two quad 8­bit serial DACs, a quad 12-bit serial DAC, and supporting operational-amplifiers (U2, U6, U13, U18, and U30)
control much of the transceiver, as has been discussed previously. U32 is a 2.5 Vdc reference used by the Quad 12­bit DAC and the variable IF attenuator (discussed previously).

U18D and associated components amplifies the dc signal supplied by U31-3.

As was discussed previously, REFOSCMOD is the dc signal, which varies the operating frequency of the reference
oscillator. Normally under DSP and microprocessor control, this line is used to FM modulate the reference
oscillator, which in turn FM modulates the RF carrier in transmit mode. This line is used to temperature compensate
the reference oscillator as well.

The DAC controlled line TXVCOMOD at U31-4 is transmit data normally controlled by DSP and a microprocessor.
This signal is routed to U18C and associated components. U18C and associated components form an active
LPF/attenuator to shape the transmit data before modulating the RF carrier in the transmit mode. The cutoff
frequency of the LPF occurs at 20 kHz. The 1 kHz peak-to-peak signal level at the active LPF output (U18-8) is
one-fourth TXVCOMOD at 2.5 Vdc.

The synthesizer reference oscillator and the transmit VCO are simultaneously modulated to balance the FM
modulation. We refer to this technique as two-point modulation. The DAC values required to balance the
modulation are dependent on RF frequency.

The dc signal at U31-17 is routed to U30 and associated components. This op-amp is configured for a voltage gain
of 2. The dc signal VATT controls the variable IF attenuator (discussed previously) in the receiver chain. Under
DSP and microprocessor control, the attenuator is normally set for a desired amount of attenuation by this DAC
controlled signal.

Q37, Q38, Q39, Q40, Q41, and associated components are used to enable and disable the 14 dB step attenuator in
the receiver chain (discussed previously). Normally under DSP and microprocessor control, the attenuator is set to
the desired state of operation via U31-13. A logic level “1” at this pin enables the attenuator. Conversely, a logic
level “0” at this pin disables the attenuator (bypass mode).

U18B and associated components amplifies the dc signal supplied by U33-2. As discussed previously, CTUNE is
the dc signal which coarse tunes the receive and transmit VCOs. Under microprocessor control, the appropriate
VCO is normally coarse tuned to a desired frequency based on curve fit data stored in the EEPROM (U15). Curve
fit data is obtained and stored in the EEPROM during coarse tune calibration procedures performed at level 2
testing.

The DAC controlled DC signal 2
Normally under microprocessor control, the 2
EEPROM (U15). The correct DAC value is obtained and stored in the EEPROM during the 2

nd

LO sets the 2nd LO (discussed previously) on frequency at 44.545 MHz.

nd

LO is set on frequency based on a DAC value stored in the

nd

LO calibration

procedure at level “2” testing.

The DAC controlled dc signal RXVTF appropriately sets the varactor tuned BPF (discussed previously) based on
the receiver tuned frequency. Normally under microprocessor control, the varactor tuned BPF is set based on curve
fit data stored in the EEPROM (U15). The curve fit is based on statistical data obtained during the testing of
hundreds of units.

The DAC controlled dc signal PWRSET sets the power amplifier (discussed previously) to a desired power level.
Normally under microprocessor control, the power amplifier is set to the desired level based on curve fit data stored
in the EEPROM (U15). The curve fit data is obtained and stored in the EEPROM during transmit power calibration
procedures at level 2 testing. The power calibration procedure obtains curve fit data for five power level settings
(0.1W, 0.5W, 1.0W, 2.0W, and 5.W) over the entire transmitter operating frequency range (136 to 174 MHz).

The DAC controlled dc signals PA1 and PA2 set the gate bias for each power transistor (Q6 and Q9 respectively) in
the power amplifier circuit (discussed previously). These two signals are routed to op-amps U2 and U6, which are

GUARDIAN VHF 110W MOBILE 2-13

configured for a voltage gain of 2. The outputs at U2-1 and U6-1, labeled PABIAS1 and PABIAS2 respectively, are
then routed to the gates of the power transistors. The correct DAC values for the bias current are stored in the
EEPROM (U15). The correct DAC value is obtained and stored in the EEPROM during the power amplifier bias
calibration procedure at level 2 testing. Each gate is biased such that 100 mA of current flows through each power
transistor with PWRSET set to a DAC value of zero in the transmit mode. Level 2 software monitors the U10
output line labeled IMONITOR when calibrating PA bias.

2.5.4 Keypad Microcontroller

The keypad board is controlled by an Atmel AVR4414 microcontroller. This is a Flash programmable device. The
microcontroller implements these functions:

 Keypad scanning
 PTT switch input
 Auxiliary keys input
 Volume switch input
 Channel switch input
 Emergency switch input
 Synchronous bidirectional serial interface to main controller at 100 kHz
 Keypad and LCD backlight control

A clock derived from the main reference clock, clocks the keypad microcontroller at 1.5 MHz. The keypad
microcontroller is powered by the 3.3V supply as the LCD driver device.

2.6 Audio Amplifier Board

2.6.1 Description

The Audio amplifier board contains the internal and external audio and control circuitry. It also houses the DB25
accessory connector, the DB9 power connector, and the RF control connector that protrudes through the rear panel.
The board is located in the Control Module. The board contains the following functions:

 RFI and transient protection and system on/off switch

 Voltage regulator and 7.8V on/off switch

 Communication with transceiver

 Audio power amplifiers

 Power levels detector and converter and the RF and DC combiner

 PA on off control

 RFI and transient protection

2.6.2 Power Conditioning

Power for the Guardian 110W control head enters this board on J5 the DB9 connector. Dual low R
FET Q10 serves as reverse polarity protection and on-off switching. Transistor Q7 pulls down the gates of Q10
when the ON/OFF signal is high, allowing Q10 to conduct. With ON/OFF control low, Q10 is cut off, and will not
pass forward or reverse polarity. An over-voltage condition is detected by D2 and Q6, which cause Q7 to cut off and
turn off power.

DS(on)

P-channel

Back-to-back transorbers D1 and D4 are used to eliminate voltage spikes before the on/off switch. The input power
is routed to the clamp circuit via an LC filter. The filter eliminates unwanted signals from being conducted to the
vehicle power line.

2-14 GUARDIAN VHF 110W MOBILE

2.6.2.1 Voltage Regulator and 7.8V On/Off Switch

Linear regulator U5 provides +7.8V to the RF power control circuitry and to the other two PC assemblies in the
control head. The regulator is powered via Q10 body diode at all time. When the unit is turned off all the circuits
are disconnected from power except the transceiver in the control head. The transceiver in this case is in the off
state. The power consumption in this case is less than 2 mA powering the boat backup memory circuits.

2.6.3 Communication with Transceiver

Twenty pin IDC headers J2 and J3 carry control and status signals from the transceiver and front panel via the
Control PCA.

2.6.4 Audio Amplifiers

The board contains two identical audio amplifiers. Each audio amplifier has 20 dB gain and is capable of delivering
more than 10W to a 4-ohm load in a bridge-tied-load configuration. They are fed from the transceiver audio output.
A front panel switch selects either or both amplifiers; an unselected amplifier is placed in a mute condition by the
appropriate disable signal. When there is no received signal, both amplifiers are placed in a low-current standby
mode by squelch comparator.

2.6.5 Power Levels Detector, Converter, and RF/DC Combiner

ON /OFF, PTT and RF output power control signals to the 110W power amplifier are generated on this board.
These are present as DC signals on the center conductor of the coaxial cable connecting the control head to the
remote RF PA. A low-pass filter prevents RF from reaching the control circuitry. The voltage levels are as follows:

DC Control Voltage Range PA State

0 to 0.4V DC on/off switch – OFF

>0.7V DC on/off switch – ON

0.7 to 1.2V PA is in bypass – RECEIVE mode

2.1V Power output set 25W

3.6V Power output set 50W

6.5V Power output set to 110W

The transceiver power levels are detected via the connection to TP21. The voltages are as follows:

TP 21 Control Voltage Boat Power Output

2.85 5W

1.87 2W

1.28 1W

The control circuits converts an input above 2.2V (5W setting) to a control signal to 6.5V, which results in 110W
generated in the remote RF power module. Accordingly it converts the 2W and 1W control levels to the indicated
PA control. Input control of less than 1V is converted to 2.6V. The PA puts out 25W also for the 0.5W input power
setting but will fail to do so at the 0.1W setting. In this case power output is not specified, and the red LED will not
light.

GUARDIAN VHF 110W MOBILE 2-15

2.6.6 PA ON/OFF Control (Bypass Mode)

It is possible to operate the system not utilizing the PA (PA in by pass mode.) This is done by turning on control
head on with the PTT depressed. An orange TX light indicates to the user that he is operating in by pass mode. In
this mode, output power is about 1dB lower that the nominal levels delivered from the transceiver, as indicated in
the table above. In normal mode, Q16 conducts at start-up, causing Q14 to conduct, which keeps Q15 off. When
using this mode, Q16 conducts in the reverse direction, Q14 remains off and Q15 conducts, which prevents bias
voltage from being sent to the RF power amplifier.

2.6.7 RF Power Indication

Operational amplifier U3A forces the output control voltage at Q8-E to be equal to that at U3-3. After high power
transmit is detected at the PA output. The RF PA test circuit forces additional current back into this line. The op­amp loop holds the voltage at the input level, so the additional current is forced out Q8-C and through R44. This
forces Q9 to conduct and sink additional current from the LED_TX. The LED_TX turns off the green light. When
the unit is in bypass (low power) mode the Tx lamplights orange because the red and the green LED’s are on.

2.6.8 Audio Board Block Diagram

Audio Block diagram

D

input voltage

B

9

D
B

25

RFI filter&

transient

protection

power level input

7.8volts

switched

voltage

ragulator

on off switch

power level

voltage

converter

PA on off

control

Switch PTT

7.8volts

7.8volts

switched

audio in

RF&DC

combiner

j

4

audio out p

internal

audio amplifier

audio out n

audio out p

external

audio amplifier

audio out n

RF &control out/in

RF IN

J2 - IDC 20 pin J3 - IDC 20 pin

2-16 GUARDIAN VHF 110W MOBILE

Figure 2-4: Audio Board Block Diagram

2.7 Display Board

The Display board consists of a seven-switch keypad and an LCD module with integrated LED blue backlight. The
board is heatstaked onto the plastic front panel, forming a permanent assembly. Electrical connections are made to
the Interface board via a 20-pin connector (J13).

The radio display module is a full graphics 80x32 pixels LCD, requiring a temperature compensated differential
driving voltage of about 12V and a 1/6 bias, 1/32 duty cycle driving scheme. The LCD driver device (Seiko Epson
SED 1530) drives the display. This LCD driver has an internal display RAM that copes with all the display
refreshing autonomously. Display data transfers from the main controller are only required when the display is
changed, selective display RAM updates are also available to minimize serial traffic. The LCD driver display RAM
is accessed through a one way synchronous serial interface and connected in parallel with the AVR serial port. The
LCD CS input is used to differentiate between serial data for the LCD driver and the keypad board hardware reset
line resets the display drive. The hardware is configured such that during hardware reset, before serial LCD data is
presented, the LCD is blank. The radio keypad consists of 16 keys, which contact onto switch contacts on the rear of
the keypad board.

Keypad

Figure 2-5: Keypad Board

GUARDIAN VHF 110W MOBILE 2-17

2.7.1 Control Logic Interface

The signals on this interface need not be filtered, but are protected from short circuits to ground. All logic signals
are at 0 to 3V Complimentary Metal-Oxide Semiconductor (CMOS) levels at the interface. The interface carries the
following functions:

• 10V Control

• Ground

• /RADON

• Switched 10V Supply

• Reset

• AVR Clock

• Serial Data Clock

• Serial Data Input

• Serial Data Output

• Key Interrupt

• LCD Chip Select

• LCD A0 (data\command select)

• Keypad Chip Select

2.7.2 Keypad

2.7.3 Switch Interface

Interface to switches is provided to the RECM via 80-pin connector to the Interface board.

2.8 Interface Board

This board is located in the Control Head Assembly in the vehicle cab. The transceiver (RECM) is mounted to this
board and interfaces through 80-pin connector J1. The front panel display PCA mounts to this assembly and
interfaces through 20-pin connector J4. The microphone interface is J5, an 8-pin modular connector.
Communication with the audio amplifier board and the remote RF Power Amplifier is through two 20-pin
connectors J2 and J3. The DC power for this board, the transceiver and front panel functions enters via J3. The 3.3V
powering the display and logic is generated by a linear regulator U1 powered from the 7.8V via an on/off switch
q12. All front panel switches and LED lamps are mounted to this board. Connection to the internal 5W speaker is
via J6.

ON/OFF control: Transistors Q11-14 are connected to the outputs of the binary volume switch SW3. The
transceiver uses these signals to detect the off position of the volume switch. At the off position all lines are open. If
any of the lines is switched and ignition power is high Q17 is on providing low (0V) to one of the transistor witch
will result in a positive ON/OFF voltage. This signal witch is routed also to the audio board to control power
function there and in the remote RF Power Amplifier.

SW4: Used to change channels. The transceiver uses the binary outputs to detect the position of the channel switch.

Toggle Switches: Program switch SW1 for a variety of functions. Switch SW2 is used to select between internal

and external audio speakers.

Front panel buttons: Keypad depressions on the front panel are detected by the scanning outputs from the
transceiver. Keypad depressions on the optional DTMF microphone are detected by the DTMF decoder on this
board and are processed as ordinary scan-in signals by the transceiver.

DTMF keypad processing: The optional DTMF can be used to program the radio. Keypad depressions generate a
DTMF tone in the audio output. This signal is routed to DTMF detector U6, and digital outputs are sent to1-of-16
de-multiplexer U2. The outputs from U2 are used to control analog switches U3-5. In this way the transceiver scan­out lines can be connected to the appropriate scan-in lines to simulate a physical switch closure.

2-18 GUARDIAN VHF 110W MOBILE

PTT processing: In normal operation, a PTT switch closure causes Q2 to conduct, which in turn causes Q7 to
conduct. This signal is distributed to the rest of the radio as the PTT signal. When a DTMF button is depressed, the
transceiver automatically transmits this tone.

PTT lockout: To prevent transmission of DTMF tone during programming, a latch circuit is provided to lockout
PTT. When the ENTER button is pressed the PTT signals is disabled by a latches circuit. When the ESCAPE button
is pressed the lockout latch is reset. It is recommended to utilize the PTT condition lockout during programming the
PTT (light will stay off). This is done by pressing ENTER key and after that hold the PTT key depressed until
programming is done. To re-key the radio release PTT and key the radio once the radio is out of the programming
mode use the ESC key quit programming.

J6, 2-pin

speaker

connection

J5, RJ11, 8-pin MIC

and KLV connection

J4, 20-pin display

connection

DTMF to keypad

interface

LED

drivers/control

J2, IDC, 20-pin audio

connection

J1, 80-pin boat connection

Programming PTT

disable

On/off controlled

3.3V regulator

Volume selector

and on/off control

J3, IDC, 20-pin audio

connection

Channel, speaker

out, ABC switch

selectors

GUARDIAN VHF 110W MOBILE 2-19

Figure 2-5: Interface Board

CHAPTER 3: SOFTWARE THEORY OF OPERATION

3.1 Functional System Operation

3.1.1 General

All control and channel software is resident in the RECM.

3.1.2 Guardian Block Diagram

DB25 Accessory Connector

LCD

Control/Fill/Code

External Power

Keyfill

User Data

Audio

Switches

Keypad

Keypad MPU

H8 Controller

DSP

Control

Transceiver

IF Output

Modulation

Receiver/Exciter/Control

Module (RECM)

Figure 3-1: Software Theory of Operation Block Diagram

GUARDIAN VHF 110W MOBILE 3-1

PSU

Power

Power Supply

Battery

Data

3.1.3 Architecture

A single digital signal processor (DSP) handles all signal-processing functions. An H8 microcontroller is used to
control the user interface and implement other radio control functions. All references to signal names relate to the
Receiver/Exciter/Control Module (RECM). Functionality partitioning is shown in Figure 1-1.

3.1.4 Board Identification

The control logic stores an electronic serial number and modification status within nonvolatile storage on the board.

3.1.5 Self-Test on Power-Up

The software automatically executes a self-test when the radio is switched on. This test is capable of detecting and
identifying faults that prevent the radio from properly operating.

3.1.6 Flash Software Upgrades

The radio software is updated if required using a PC and the Guardian G25AXG004 PC Programming/Cloning
cable.

3.1.7 Voice Coder/Decoder (VOCODER)

The VOCODER uses an improved multi-band excitation (IMBE) voice-coding algorithm as specified in the
telecommunications industry association and electronic industries alliance (TIA/EIA)-102.BABA. The IMBE
VOCODER compresses a high-bit-rate waveform into a low-bit-rate data stream suitable for transmission over the
channel. The VOCODER operates at a net bit rate of 4.4 kbps for voice information and a gross bit rate of 7.2 kbps
after error control coding.

3.2 Radio Control Software

This software controls the transceiver and baseband signal processing functions.

3.2.1 Audio Control

H8 controls the analog audio signal processing. Audio for transmission comes via an external microphone attached
to the front panel. It is wired into the microphone amplifier, which is permanently powered.

Audio output is required when a voice message is received or a tone is generated by the user interface. To allow
audio output, H8 sets either SPKRON or EXTSPKRON to the internal speaker or the accessory connector. If an
external audio accessory is detected by who are you (WRU) <0.5 Vdc, the audio is routed to the accessory
connector. Otherwise audio is routed to the internal speaker. The 16-position volume control knob is decoded and
sent to the DSP through the controller software to control the output audio volume.

3.2.2 DSP Control Software

The DSP implements most of the baseband signal processing in the radio. Its function is controlled through its host
port by the H8 controller. The DSP operates in a number of basic modes controlled by H8 through the host port.
They are as follows:

Mode Description

Idle Current shutdown mode released through the host port

Searching Actively looking for a signal on the IF input signal

Searching paused Search algorithm paused for an economize cycle or frequency change

Active receive Actively receiving a message, initiated by detecting a signal or H8 command

Transmit Actively transmitting voice or data

Keyfill Keyfill operations and key

Management Management tasks

3-2 GUARDIAN VHF 110W MOBILE

The DSP pages-in different program images from the Flash for different modes of operation. Typically one image is
used for receive and standby modes, but a new image is needed for transmit and key management operations. The
DSP can interrupt the H8 controller, and then pass data over the host port back to H8. Interrupts from the DSP
include the following events:

• Signal detected with type data

• Signal lost

• DSP BIT errors

• Paging request

In all active modes the H8 software must be able to write a number of parameters to the DSP and also read back a
number of parameters from the DSP. This is implemented through the host port. The parameters used include:

Mode Description

Search

Reference oscillator temperature used by DSP to correct frequency offsets. AGC

reset control is used at start of search period
Analog setting BW, squelch tones, squelch code, and squelch level

Digital setting Data rate, key, and algorithm

Project 25 setting NAC and TGID

CVSD setting Continuously variable slope delta (CVSD). Data rate

Receive

Reference oscillator temperature used by DSP to correct frequency offsets. Audio

volume

Analog setting Squelch controls, de-emphasis, and companding

Digital setting Data rate and key algorithm

Project 25 setting NAC, TGID, BER, and test mode

CVSD setting Data rate and key

Project 25 setting Read by H8: SS bits, low-rate data (for future use), and sender ID

Transmit

Reference oscillator temperature used by DSP to correct frequency offsets. Audio

volume, sidetone on/off

Analog setting Squelch controls and de-emphasis

CVSD setting Data rate and key

Project 25 setting NAC, TGID, key and low-rate data (for future use)

3.2.3 Transceiver Board

The Transceiver board is controlled through a synchronous serial bus from H8 to the transceiver allowing H8 to
control the synthesizer, two 4-channel 8-bit digital to analog converters (DAC), and a control shift register in the
transceiver board. Some of the DAC channels are set according to data in the transceiver’s electronically erasable
read-only memory (EEPROM) calibration tables.

3.2.3.1 Mode Control

The transceiver shift register and the CTX output of the field-programmable gate array (FPGA) control the modes of
operation (transmit, receive, or standby). The outputs are controlled as below:

Mode Description

Spare (SR bit 1) Spare

3.3VRXSynth (SR bit 2) Set in active receive mode, RXVCO enable

3.3VTXSynth (SR bit 3) Set in active transmit mode, TXVCO enable

3.3VRXEnable (SR bit 4) Set in active receive mode, receiver enable

Spare (SR bit 5) Spare

Spare (SR bit 6) Spare

GUARDIAN VHF 110W MOBILE 3-3

Mode Description

TX/RX (SR bit 7) Set in active transmit mode, front end TX/RX control

STD/SIDE (SR bit 8) Set to use radio antenna, reset to use accessory connector RF port

CTX (FPGA output) Set in active transmit mode to enable the RF power amplifier

3.2.3.2 Frequency Control

The frequency of operation in both transmit and receive is controlled by the H8 setting in the synthesizer through the
serial bus. To set the desired frequency, the appropriate TX or RX synthesizer enable S-R bit must be set, the serial
data loaded into the synthesizer chip, and the DAC2 output A synthesizer coarse tune set to the appropriate value for
the frequency according to the EEPROM calibration table. Synthesizer lock is monitored by the out-of-lock (OOL)
input. Once the synthesizer lock is achieved, the transmitter or receiver is enabled with the appropriate control bits

3.3VRX enable, CTX, and TX/RX. Economizing the synthesizer function is implemented by controlling the

3.3VTXS/RXS bits and by controlling the EM main divider enable bit in the synthesizer control word. If the
frequency is unchanged, the synthesizer serial data need not be reloaded when coming out of economize.

3.2.3.3 12-Bit DAC

DACLDA, DACADCCLK, and DACDOUT control the 12-bit DAC for IFAGC, TXVCOMOD, REFOSCMOD,
and VATT.

3.2.3.4 Reference Oscillator Temperature Compensation

The H8 software constantly monitors the reference oscillator crystal temperature using the XTALMON line. The
temperature data is used to lookup the compensation factor in the transceiver’s EEPROM calibration table. This
compensation factor is written into the DSP, added as a dc offset reference oscillator modulation signal, and used as
a dc offset in receive mode.

3.2.3.5 Receiver Control

Setting 3.3VRXE enables the linear receiver chain. The DSP implements software AGC system to control the gain
of the linear receiver chain. The H8 controller monitors the actual received signal level by reading RSSI. At all
times during receive the RXVTF DAC2 output C must be set to the value in the EEPROM calibration table
corresponding to the receive frequency used. This makes the receiver’s front-end tunable filter centered on the
desired frequency. At all times in receive modes the second LO DAC2 line output B must be controlled using data
from the EEPROM calibration table and indexed with oscillator temperature data XTALMON. The temperature
compensates the second LO in the receiver chain.

3.2.3.6 Transmitter Control

The radio uses a complex H8 software-based algorithm to dynamically control the transmit power of the radio. The
inputs to the power control algorithm are: requested power level (0.1W, 0.5W, 1W, 2W, or 5W), PA calibration
data in the EEPROM, supply voltage BATMON (used for monitoring), transmit frequency, PA current, (used for
monitoring), and PA temperature (used for monitoring).

The power control algorithm takes these inputs and uses them to control the following outputs to provide a steady
RF power output with a clean rise and fall at switch on/off.

Output Description

PWRSET (DAC1 output A) Sets the power level in the power amplifier ALC loop

PABIAS1 (DAC1 output B) Adjusts the bias in the final driver stage

PABIAS2 (DAC1 output C) Adjusts the bias in the final driver stage

3.2.3.7 TX/RX Switching

The procedure needed to quickly switch the transceiver from receive to transmit and back again is to shut down the
current mode, lock the synthesizer in the new mode on the new frequency, and enable the transmitter or receiver, as
required.

3-4 GUARDIAN VHF 110W MOBILE

3.2.3.8 Receiver Scanning

In some scanning modes it is necessary for the radio to scan a number of channels looking for traffic, as controlled
by the H8 software. The basic requirement is to change the synthesizer frequency, RXVTF, synthesizer tune DAC,
and to resume searching on the new frequency. The DSP may have to be informed of new traffic settings on which
to search, for each new frequency. Scanning is interrupted when the DSP detects a signal of interest.

3.2.4 DC Power Control

The H8 controller software controls the power supply switching in the radio. The control software algorithm uses
the following inputs:

Input Description

/PWROFF Indicates the current position of the radio on/off switch and the accessory connector off line

WRU Indicates if the radio is fitted into a harness providing external power

/LBOUT Indicates the supply voltage is at the minimum required for correct operation

BATBUS Not used in the mobile configuration

BATMON Indicates the voltage on the main radio supply from external power source

These inputs are used to control the following FPGA outputs:

Output Description

PWRHOLD

BATOFF Not used in the mobile configuration

Additionally the /LBOUT interrupt is used to execute a fast shutdown of the software when the supply voltage drops
below that needed for normal operation, or when the power source is removed without switching the radio off.

Set during normal operation, the radio stays on regardless of the on/off switch. When
PWROFF indicates that a switch off is required, software shut down is executed followed
by a release of this output

3.2.4.1 Power Supply Frequency Control

The power supply software controls the switch mode power supply frequency output according to the RF frequency
used. The frequency is checked and changed if necessary at every synthesizer frequency change.

3.2.5 Monitoring

The H8 software monitors the following signals:

Signal Description

Out-of-lock In all active modes, every 100 ms

EPTT/RTS In all modes, every 20 ms

RSSI In receive modes, every 100 ms

WRU In all modes, every second

DC voltage In all modes, every 5 seconds

PA temp In transmit modes, every second

REF temp In all modes, every 5 seconds

PA current In transmit modes, every second

3.2.6 Radio Control Drivers

A number of low-level software drivers are used by H8, which interface to the transceiver hardware.

GUARDIAN VHF 110W MOBILE 3-5

3.2.6.1 Audio and Power Supply Unit (PSU) Driver

A serial interface driver controls the output bits of a serial-to-parallel output shift register in the FPGA. Clock and
data source for this shift register is the same serial port used for the user interface serial bus, but data is directed to
the shift register using high-order H8 address lines.

3.2.6.2 Transceiver Serial Bus Driver

A serial interface driver controls the transceiver shift register, DAC, and synthesizer. It uses a common clock and
data line, and three separate strobe lines for each device.

3.2.6.3 DSP Host Driver

The H8 software includes a DSP host driver for controlling the DSP mode of operation, and initial start-up code
download.

3.2.6.4 IIC Bus Driver

The H8 software includes a driver that allows the controller software to read and write to the transceiver EEPROM
using IIC protocols. The two lines are general-purpose I/O lines controlled on a bit-by-bit basis by the software.

3.3 Digital Signal Processing

The DSP software implements all baseband signals processing in the radio. It processes signals between the user
audio and data interface, and the transceiver modulation and intermediate frequency (IF) interfaces. The signal
processing provides compatible analog FM modes, common air interface (CAI) compatible modes, and 12 kbps
secure CVSD modes.

3.3.1 DSP Transmit Chain

Signal processing while the radio is transmitting depends on the radio's operational mode. The possible modes are
clear analog voice FM, CVSD DES voice, Project 25 clear digital voice, and Project 25 DES digital voice. The
Transmit DSP Chain block diagram is shown in Figure 3-2. The major signal processing functions of the DSP
transmit chain are described in the following paragraphs.

3.3.1.1 Audio Coder/Decoder (CODEC)

The Guardian uses a Texas Instruments® TLV320-AC36 audio CODEC. Data is transferred to and from the
CODEC using the DSP enhanced synchronous serial interface (ESSI) 0 port. The data word is 16 bits long. The
first thirteen bits are the two’s compliment audio sample, and the last 3 are the volume control word in the receive
direction (DIN), and zero padded in the transmit direction (DOUT). The DSP currently sets volume control bits for
no attenuation. Scaling the signal prior to sending it to the CODEC controls the volume. The sample rate from the
CODEC is 8 ksps.

3.3.1.2 Audio Processing Board

The Audio Processing board receives audio input from the audio CODEC, applies filtering and automatic gain
control (AGC), and transmits it to the mode-specific formatting module. The audio filter has a passband from
300 Hz to 3 kHz. This board also transmits DTMF tones to the audio CODEC. DTMF over-dial is supported to
allow redirection through the phone network via a base station. Data is transferred to and from the CODEC under
interrupt service routine (ISR) control.

3.3.1.3 Project 25 Voice Module

The Project 25 Voice module performs framing and conversion tasks. The framing function uses its own task table
to build a CAI time-division multiple access (TDMA) frame. This includes compression of the voice signal using
the IMBE VOCODER, forward error correction, and encryption. The physical layer task converts a 4.8 ksps dibit
data stream into a 48 ksps real sampled waveform, which is then fed to the Modulation module. The physical layer
scales each dibit symbol so that the proper frequency deviation is attained. It applies raised cosine filtering for
control of inter-symbol interference.

3-6 GUARDIAN VHF 110W MOBILE

r

Project 25 Voice

Module

VOICE

Audio

CODEC

DTMF

Tones

Audio

Processing

Module

CVSD DES

Module

Analog FM

Module

Transceive

Modulation

Module

Figure 3-2: Transmit DSP Chain

3.3.1.4 CVSD DES Module

Audio data from the Audio Processing module is sent to the audio circular buffer. The sample rate is increased from
8 ksps to 12 ksps. The CVSD encodes the data and sends it to the transmit CVSD audio circular buffer. The data is
DES-encrypted and differentially encoded before sent to the physical interface buffer. The CVSD physical layer
converts the CVSD encoded, DES encrypted 12 ksps data stream into a 48 ksps waveform suitable for processing by
the Modulation module. The module contains a finite impulse response (FIR) raised cosine filter that acts as an
interpolation filter. Transmitting an end of message (EOM) indicator, consisting of 160 ms of alternating ones and
zeros, signals the end of a transmission. This allows the receiving radio to squelch the audio output before the radio
stops transmitting.

3.3.1.5 Analog FM Module

Audio data entering the Analog FM module is sent through a linear-phase, FIR, audio-shaping filter. Interpolation
from 8 ksps to 48 ksps is accomplished using a linear-phase, FIR filter. A single-quadrant sine look-up table (LUT),
using fractional addressing and quadrant folding, generates continuous tone controlled squelch system (CTCSS)
tones. If the DCS audio turn-off code is transmitted, the tone is fixed at 134.4 Hz and the codes transmitted at a rate
of 134.4 bps, derived using the CTCSS tone generator. The DCS data stream passes through a raised cosine filter
before added to the speech. The 8 ksps audio stream, with CTCSS/DCS controls, is interpolated to 48 ksps before
sent to the Modulation module.

3.3.1.6 Modulation Module

The Modulation module prepares the signal for transmission. The signal is split into a reference oscillator signal and
a voltage controlled oscillator (VCO) signal. This allows independent scale and offset values for each signal. A
modulation-balance variable scales the reference oscillator voltage, so that the maximum frequency deviation is
constant for all RF channels. A transmit modulation variable does the same for the VCO signal.

GUARDIAN VHF 110W MOBILE 3-7

3.3.1.7 Transceiver Interface

The transceiver DAC has four output ports, two of which modulate the carrier. One of the two channels maintains
carrier frequency accuracy. On transmit channel changes, the controller provides the DSP with two fractional values
used to scale the two signals output from the DAC. The controller provides the DSP with an additional integer value
at one second intervals, and is added to one of the DAC output signals to control carrier frequency accuracy. The
modulation interface receives modulation data samples at 48 ksps, independent of the transmit mode. When the
radio is operating as a transmitter, the transceiver interface controls the operation of the DAC via ESSI 1 on the
DSP. Data is written to the DAC at 96 ksps.

3.3.2 DSP Receive Chain

The radio receive chain hardware consists of an RF transceiver board, analog to digital converter (ADC), a
Motorola® DSP 56302 or DSP 56309, and an audio CODEC. The Receive DSP Chain block diagram is shown in
Figure 1-3. The major signal receive functions of the DSP receive chain are described in the following paragraphs.

Project 25

Voice Module

Transceiver

Audio

CODEC

FM

Demodulator

Signal

Detectors

Audio

Processing

Module

CVSD DES

Module

Analog FM

Module

Figure 3-3: Receive DSP Chain

3.3.2.1 Transceiver

The RF transceiver board performs mixing and filtering of the received signal to produce a 455 kHz, 25 kHz
bandwidth (BW), IF signal. The output signal from the transceiver is digitized by the ADC and fed to the DSP. The
bulk of signal processing is performed by the DSP. An ISR that implements the transceiver/ADC/DAC interface is
called at a rate of 96 kHz in receive modes. The ISR reads ADC output data, stores the values in a circular buffer,
and controls data transmission to the DAC.

3.3.2.2 FM Demodulator

The FM demodulator converts the FM output of the transceiver to a real-valued, baseband signal. FM demodulation
is implemented by a discriminator task. Sub-sampling the 455 kHz IF at 96 kHz folds down the signal to 25 kHz. A
mixing function mixes the sampled IF data in the input buffer before filtering. For 12.5 kHz channels, a second

3-8 GUARDIAN VHF 110W MOBILE

filter is applied to the IQ data stream. Calculating the angular difference between consecutive IQ pairs demodulates
the received signal.

3.3.2.2.1 Analog to Digital Converter

Because the signal BW is much less than the 455 kHz carrier frequency, the ADC sub-samples the 455 kHz IF
producing a frequency translation as part of the sampling process. The ADC sampling rate is 96 ksps.

3.3.2.2.2 25 kHz Frequency Translation

The 25 kHz frequency translation converts the signal image into a baseband signal, centered at 0 Hz. The DSP
implements the digital equivalent of a mixer to perform frequency translation.

3.3.2.2.3 IF Filtering

The complex baseband signal is sent through two linear phase FIR filters. The first IF filter is used as a decimate by
two, polyphase, FIR filters and applied to the 96 ksps, complex, baseband output of the 25 kHz mixer. This filter
removes some of the out-of-band noise produced by the nonlinear analog components of the transceiver. CVSD
DES and analog wide modes have a 25 kHz BW and the first IF filter is the only filtering performed for these
modes. Project 25 and analog narrow modes have a 12.5 kHz BW. The second IF filter provides the filtering
required for these modes and is applied to the 48 ksps output of the first IF filter.

3.3.2.3 Signal Detectors

The radio uses three signal detectors to detect the presence or absence of a modulated signal in the tuned channel.
These signal detectors search for Project 25, analog FM (including noise, CTCSS, and DCS), and CVSD DES
signals.

3.3.2.3.1 Project 25 Detector

The Project 25 frame detector detects a Project 25 signal by searching for the frame synchronization (FS) signal and
network identifier (NID) embedded in the preamble of every Project 25 data unit. The detector uses this information
to perform bit recovery and packet identification. It processes and buffers the binary data for use by the Project 25
Voice Module. Once a target signal is detected, the radio disables squelch using an enable transmit function, so the
user can monitor the signal. If the detected signal is lost, squelch is enabled by the shutdown active receive
function.

3.3.2.3.2 Analog FM Detector

The analog FM detector uses a function to decimate the incoming data stream by six, to run the noise detector,
CTCSS single-tone detector, CTCSS multi-tone detector, and the DCS multi-code detector. A noise squelch detect
function detects the appearance of a carrier by searching for a drop in power in a frequency band just above the
audio band. In the analog noise detector, the input data is scaled and high-pass filtered, then rectified and scaled
again. Then the data is low-pass filtered. The output of the low-pass filter is used to determine whether or not a
signal is present.

The detector has two states, searching and locked. If the detector state is searching and the detected power drops
below the lower squelch threshold, the detector state transitions to locked. Conversely, if the detector state is locked
and the detected power rises above the upper squelch threshold, the detector state transitions to searching. Upper
and lower threshold values are BW dependent and can be adjusted at run time.

The multiple-value DCS detector searches for a 134.4 bps bit stream in the sub-audible frequency band used for
DCS codes. If found, the code is extracted and appropriate state variables updated. Code extraction is performed in
two steps: input data is converted to a binary bit stream, and then data extraction and code comparisons are
performed.

The conversion of the input data to a binary bit stream starts with the 8 ksps input data sent through a decimate by
six, FIR filter to produce a 1.33 ksps, real valued data stream. This filter removes any signal energy outside of the
sub-audible frequency band. The data is then split into two paths. The lower path estimates the dc content of the
signal with a narrow low-pass infinite impulse response (IIR) filter. Subtracting the lower path signal from the

GUARDIAN VHF 110W MOBILE 3-9

upper path signal removes the dc component from the upper path signal. Following this, the resulting signal passes
through a single-bit quantizer and the output buffered for use by the code removal step. Data extraction and DCS
code comparisons are then accomplished.

3.3.2.3.3 CVSD DES Detection

Detection of CVSD DES waveform is performed by a secure detection function. This function also recovers the
12 kbps bit stream from the 48 ksps input signal. The detector looks for a 12 kbps data stream to determine if a
CVSD signal is received.

3.3.2.4 Project 25 Voice Module

The physical layer task extracts FS, NID, SS symbols, and data. All other dibits are passed to the receive framing
task. The module performs recovery and symbol extraction based on frame synchronization using a correlation
detector. Symbol extraction and error-correction decoding follow carrier frequency offset compensation.
VOCODER data and Project 25 framing data is removed and secure mode decryption performed. The VOCODER
converts the compressed voice data stream to a 8 ksps audio data stream that is sent to the Modulation module.

3.3.2.5 Analog FM Module

The analog FM module performs two tasks. The detection task uses an FIR filter to down-sample the FM
demodulated bit stream from 48 ksps to 8 ksps. It then uses four detectors (noise, single-tone CTCSS, multi-tone
CTCSS, and multi-code DCS) to determine signal squelch. The post-detection audio-shaping task applies de­emphasis on/off filtering to a received clear analog signal.

3.3.2.6 CVSD DES Module

The CVSD DES module consists of a 12 kbps clock detection/recovery task, a 12 kbps symbol resolver, a
differential decoder, a DES decoder, a 12 kbps CVSD decoder, and a 12 ksps to 8 ksps sample rate converter. The
input to the clock detection algorithm is a 48 ksps data stream, representing the sampled FM demodulated carrier.
To allow for variation in carrier frequency, the dc component of the demodulated carrier is removed before zero­crossing detection. From a zero-crossing phase profile, a decision can be made whether a 12 ksps data stream is
present on the demodulated carrier, or a 12 kHz clock recovered for usage within the 12 kbps symbol resolver.
Differential encoding of the binary FSK modulation ensures compatibility between manufacturers, so that either a
positive or negative frequency shift can be used to represent a 1 symbol. In the CVSD receive chain, differential
decoding precedes one-bit cipher feedback DES decoding. To conserve memory and aid processing efficiency, all
symbols (encoded and decoded) are packed in memory. The 12 kbps CVSD decoder is modeled after FED-STD-

1023.

The decoder consists of a modulation level analyzer (MLA), a syllabic filter, a pulse modulator, a principal
integrator and a comparator. The output of the CVSD decoder is at 12 kbps and must be changed to 8 ksps for
output by the CODEC.

3.3.2.7 Audio Processing Module

An audio receive task function and an audio filter is used to output Project 25, clear analog, or secure analog speech
samples to the CODEC. When in active receive modes, the ISR is enabled and the task outputs data to the CODEC
circular buffer as data is written to it’s audio input circular buffer.

3.3.2.8 Audio CODEC

The audio CODEC and the DSP interface uses the DSP ESSI 0 port. The serial clock to the CODEC operates at

2.048 MHz, and is derived from the DSP internal clock. ESSI 0 is configured to operate using a frame rate divider
of 16 and a word length of 16 bits, transmitting packets of encoded audio to the CODEC at 8 kHz. The CODEC is
used in a linear decode mode, where 13 bits are used to represent the full audio range. The post-processed DSP
signal is fed to the audio CODEC, which converts the signal to an analog waveform, applies gain, and routes it to
the appropriate output device.

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3.3.3 DSP Software

The program data for the DSP is stored in 64K Flash program blocks. The data is stored as unpacked bytes. The
blocks used for the DSP software are dedicated so that selective upgrades of this code only are possible.

3.4 Keypad MPU Software

3.4.1 Overview

The keypad microprocessor unit (MPU) provides an indirect interface via the Motherboard to the DTMF keypad and
front panel switches. It communicates with the main controller via a synchronous bi-directional serial link.

3.4.2 General

The software is designed so that processor activity and current consumption is minimized. The only continuous
operation required is keypad scanning and switch reading. An external clock at 1.5 MHz clocks the keypad. The
hardware reset is supplied from the main controller.

3.4.3 Keypad Scanning

The keypad scanning software continuously scans the keypad at a rate of a row every 10 ms. A debounce period of
40 ms is used on key presses and key releases. The software deals with simultaneous key presses and key rollovers,
making only single key presses valid. Debounced and validated key presses are passed to the serial data output
buffer.

3.4.4 Push-to-Talk (PTT) Input

Inputs from the momentary input switches, and the PTT and auxiliary keys, are read every 10 ms and are debounced
for 40 ms. The validation software filters out simultaneous presses of the auxiliary keys and the key rollover
between them. Simultaneous presses of the PTT switch and one auxiliary key are allowed. Debounced and
validated auxiliary key presses and PTT press and releases are passed to the serial data output buffer.

3.4.5 Switch Input

Inputs from the rotary switches and toggle switch are read at least every 40 ms. Changes in state are debounced for
100 ms. Debounced new switch positions are passed to the serial output buffer.

3.4.6 LED Output

The outputs to the LED are controlled under instruction from the serial port. It is possible to set both outputs off, set
the red LED on, set the green LED on, set both LEDs on (orange), and to flash either or both on a 50% duty cycle at
a controlled rate of approximately 1 Hz.

3.4.7 Backlight Control

The two LCD backlight controls for setting bright and dim operations are controlled under instruction from the serial
port. The keypad uses a fixed level backlight operation. A timeout facility switches off the backlight after
30 seconds if not requested by the main controller.

3.4.8 Serial Interface

The keypad controller implements a synchronous bi-directional serial interface using its serial port allowing it to
interface to the main controller. The main controller always sources the serial data clock. To allow autonomous
transfers from the keypad controller, a separate keypad interrupt line is provided with the interface. The interrupt
line is used to request 8 clocks from the main controller to transfer data from the keypad. The LCD chip select (CS)
input line is used to distinguish between serial data for the keypad controller and LCD driver. The serial interface
supports the following transfers:

• Keypad to controller including:

GUARDIAN VHF 110W MOBILE 3-11

Keypad power up okay
Keypad error 1-n
Key press 1-16
Key release 1-16
PTT press
PTT release
Volume switch 1-16
Channel switch 1-16
Toggle switch 1-3
Auxiliary key press 1-3
Emergency key press

• Controller to keypad

• Request current switch status

• Reset and execute BIT test

• Backlight off/bright/dim

• LED off/red/green/yellow/flash/flash rate

• Key press request and interrupt acknowledge

LCD data transfers are in blocks of 80 bytes maximum, allowing a pause on the serial interface at least every 100 ms
for the keypad MPU to assert the interrupt and transfer key press or switch change data. During the LCD data
transfers, the key data are buffered into the keypad MPU.

3.5 Data Interface

The DSP incorporates a user data interface through its SCI port.

3.5.1 CAI Data Interface

The DSP supports an asynchronous data interface for CAI modes using its SCI port. This interface conforms to the
CAI data peripheral interface. It uses standard V24, and RS232 baud rates up to 9600 baud. The software also
controls the associated flow control signal data of the terminal ready (DTR) input to the DSP, and the clear to send
(CTS) output from the DSP. The request to send (RTS) input to the radio for this interface is processed by H8.

3.5.2 Synchronous Serial Data Interface

The DSP supports a 12 kbps synchronous serial port using its SCI port. The interface is half duplex, uses a DSP
generated clock, and includes minimum data buffering within the DSP and RTS/CTS flow control on the transmit
function.

3.5.2.1 Receiver Synchronous Serial Data Buffering

In receive synchronous serial data modes the DSP software uses a variable length first-in first-out (FIFO) buffer to
cope with differences in clock rates between the transmitter and receiver.

3.5.3 CAI Data Link Layer

This software provides the link between the raw voice and data bit streams, in addition to the data formats required
to implement a 9.6 kbps CAI compatible interface.

3.5.3.1 CAI Transmit Voice Mode

The DSP software takes the 144 bit voice code words (encrypted or not) and a number of link control fields set by
the host H8 or from the DES system, and formats CAI-compatible logic link data units.

3.5.3.2 CAI Transmit Voice Test Modes

The DSP software is capable of transmitting the CAI voice silence test pattern, the CAI 1 kHz test pattern and a
9 x 144-bit (1296) PRBS test pattern used for error rate tests. The H8 controller controls these test modes.

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3.5.3.3 CAI Receive Voice Mode

The DSP takes the 9.6 kbps CAI-compatible data stream and framing, and splits out the voice data for passing to the
VOCODER. The DSP decodes the link control words so that the host H8 can read the link control fields, and the
encryption synchronization information is available to the encryption process. CAI receive processing is initiated by
the frame synchronization correlator trigger. When this is asserted the next 64 bits of network identifier (NID) data
are decoded and checked. If the NAC code matches the one selected for the channel, voice or data processing
proceeds, otherwise the physical layer is forced into search mode.

3.5.3.4 CAI Receive Voice Test Mode

The DSP software is capable of testing the 9 voice code words received in a CAI frame against a known 9 x 144
PRBS segment. The total number of errors in that frame is then output to the H8 controller. The H8 controller
controls this test mode.

3.5.3.5 CAI Transmit Data Mode

The DSP selects the user data (encrypted or clear) and a number of link control fields set by the host H8 or from the
DES system, and formats logic link data units compatible with the CAI at 9600 bps.

3.5.3.6 CAI Receive Data Mode

The DSP selects the 9.6 kbps CAI-compatible data stream and framing, and splits out and decodes the data for
passing to the user data port. The DSP decodes the link control words so that the host H8 can read the link control
fields, and the encryption synchronization information is available to the encryption process.

3.5.4 Transmit Physical Link Layer

This software uses common modulator interface software and a number of mode-dependent, physical link layer
software modules.

3.5.4.1 Transmit Modulation Interface

The software provides a common interface to the dual modulation, DAC in the transceiver through its SSI serial port
1 for all transmit modes. In transmit modes, the SSI uses an externally sourced clock at 3072 kHz. This interface
takes frequency deviation samples at 48 kHz, and writes each value scaled by a fixed number set by the host to both
the reference oscillator DAC and the VCO DAC. Additionally a host-controlled dc offset is added to the reference
oscillator DAC value.

3.5.4.2 Transmit CAI Physical Link Layer

This software takes the 9.6 kbps CAI-compatible data stream and converts it to 48k samples of frequency deviation
data. To achieve this the software implements the dibit for symbol mapping, Nyquist, and shaping filters as
described in the CAI.

3.5.4.3 Transmit Analog FM Physical Link Layer

This software takes the 8 ksps filtered audio and converts it to 48 ksps of frequency deviation data compatible with
TIA/EIA-603 in 12.5 kHz and 25 kHz modes. The signal processing uses additional high-pass filtering to reduce the
energy in the DCS tone band, audio band pre-emphasis if required, DCS tone addition, and deviation limiting and
smoothing. The software is capable of operation in 12.5 kHz, and 25 kHz channel spacing with appropriate
deviation scaling. It is capable of appending a phase reversed tone burst of 180 ms as defined in EIA-603,
generating DCS and audio turn-off codes, and companding the voice signal in 12.5 kHz mode.

3.5.4.4 Transmit CVSD Physical Link Layer

The transmit CVSD physical link layer converts the 12/16 kbps CVSD data stream and converts it to 48 ksps of
frequency deviation data. The software implements a pre-modulation filter with raised cosine time response and
100% eye height.

GUARDIAN VHF 110W MOBILE 3-13

3.5.5 Receive Physical Link Layer

This software uses common FM demodulation software, and mode-dependent receiver physical layer software
modules.

3.5.5.1 Receive ADC and DAC Interface

In receive modes SSI port 1 is used in a duplex manner to allow the ADC to be read continuously at 96 kHz and the
DAC written up to 48 ksps for AGC and reference oscillator adjustment. In receive modes, the SSI port is clocked
at 1536 kHz from an external clock source, using a 16-bit cycle. At every cycle a value is read out of the ADC. At
every other cycle a value may be written to one of the DAC channels to control the AGC and reference oscillator.

3.5.5.2 FM Demodulator

This software provides a common interface to the 96 ksps IF signal at SSI port 1 and produces 48 ksps of frequency
deviation data for use in all modes. The SSI port uses an external clock at 1536 kHz. The software implements an
FM demodulator function using a quadrature mix with a 24 kHz (Fs/4) local oscillator, dual I and Q channel filters,
and a frequency estimator. The channel filtering function is programmable-dependent on the channel spacing used.
The channel filtering provides the adjacent channel filtering in addition to that provided by the hardware to achieve
the radio adjacent channel rejection performance.

3.5.5.3 Receive CAI Physical Link Layer

This software takes the 48 ksps of frequency deviation data and outputs a 9.6 kbps data stream. The software
implements an integrate and dump filter and data slicer as described in the CAI. The integrate and dump filter is
controlled by a clock recovery function that selects one of ten possible phases for output to the slicer. The slicer
incorporates an averager with a time constant of at least 100 bits, to correct for dc offsets in the received signal.

In parallel with the above, a FIR correlator searching for the CAI fixed framing sequence of 24 symbols operates on
the filtered 48 ksps of frequency deviation data. The correlator operates at 10 samples per symbol. The correlator
phase with the highest correlation peak selects the clock phase for use in the integrate and dump filter and slicer.
This correlator operates continuously when searching for CAI traffic and occasionally when tracking an CAI signal
when subsequent frame syncs are expected. The correlator trigger is used to provide a framing signal for the
subsequent CAI link layer processing.

3.5.5.4 Receive Analog FM Physical Link Layer

This software takes the 48 ksps frequency deviation data and outputs 8 ksps of audio to the receive audio processing.
Software signal processing implements a high-pass filter to remove CTCSS tones and de-emphasis if required. The
gain of the signal path is adjusted to cope with the different deviations used on different channel bandwidths. The
signal processing signal path is controlled by squelch signals. The software includes audio expanding to reverse the
transmit companding.

3.5.5.5 Receive CVSD Physical Link Layer

This software takes the 48 ksps frequency deviation data and outputs 12/16 kbps serial data. The software uses a
data filter, a slicer, and a clock recovery function.

3.5.6 DES Encryption

The DSP software implements DES encryption of traffic in the CAI and CVSD modes.

3.5.6.1 DES Kernel

The DSP software implements the DES encryption kernel as described in FIPS 46-2, encrypting 64 data bits using a
56-bit key. It uses output feedback operation or a single bit cipher feedback operation.

3-14 GUARDIAN VHF 110W MOBILE

3.5.6.2 CAI Encryption

The DSP software uses DES kernel software to implement the CAI encryption of voice traffic as described in
TIA/EIA/IS-102.AAAA. The key manager supplies the encryption key. In transmit, the message indicator (MI)
vector is passed to data link processing for encoding and transmission. In receive, the data link layer decodes the MI
vector, and fly wheeled if decoding fails for up to n frames.

3.5.6.3 DES Data Link Layer

This software encrypts and decrypts the 12 kb of CVSD data using the DES kernel. During transmit, framing
synchronization data and the MI vector are inserted into the data stream. In receive, the software searches for and
extracts the framing and MI data. Bit definitions and formats are defined in the DES protocol.

3.5.6.4 Key Interface

This software provides an interface for inputting DES encryption keys from the DSP SCI port using synchronous
data transfers with an external clock, and for conforming to the Motorola KVL data transfer mechanism and the CAI
DES keyfill protocol.

3.5.6.5 Key Bank

The radio maintains a bank of up to 16 encryption keys stored in Flash memory. Associated with each key are a key
ID, key data, and an 8-character alphanumeric tag. Each encrypted channel is assigned one of the 16 keys for both
secure transmit and secure receive modes. Channel key assignment is accomplished by selecting the corresponding
key tag. Upon entering the secure transmit or secure receive mode, H8 transfers the appropriate encryption key to
the DSP through the SCI port.

3.5.7 Host Interface

The DSP is controlled through its host interface by H8. It initially boots up through this interface. The host
interface is used for DSP mode control, encryption key transfer, link control data transfer, low-rate data transfer,
frequency variable data transfer, CTCSS mode control, and initial software download.

3.5.8 Flash Interface

The DSP has direct access to the main radio Flash memory through the H8 bus arbitration logic. This interface is
used for software downloads using byte-wide direct memory access (DMA) transfers under host control for mode
changes. The DSP software does not write to Flash memory.

3.5.9 Paging

The DSP software is designed so that normal operation does not involve off-chip bus accesses. This means the code
size must be limited to 24K words and the data memory to 10K words. A number of program images that
correspond to different modes are allowed, with paging of images out of Flash by the DMA at mode changes. The
minimum subdivision of images corresponds to the following modes, and a continuously resident core host interface
function.

• Initialization/POST

• Receive 12.5 kHz

• Receive 25 kHz

• Transmit 12.5 kHz

• Transmit 25 kHz

• Keyfill

The paging DMA mechanism is controlled by the host H8 and allows the transfer of a program image within 50 ms.

GUARDIAN VHF 110W MOBILE 3-15

3.5.10 Hardware Control

y

r

r

r

The DSP software controls the DSP clock rate through the phased locked loop (PLL) output divider. The DSP clock
rate is dynamically matched to the mode of operation, in coarse steps for example, between searching and tracking
receive modes. The DSP software uses low-current wait modes in pauses between processing to minimize current
consumption. The host is also able to request a very low-current idle mode in the DSP. The host releases this mode.

3.6 Controller Software

3.6.1 Overview

The controller software has overall control of the radio; including user interface operations, and the DSP and
transceiver. Figure 1-4 is the controller software block diagram.

Alarms

Ke

Radio Control Software

Audio

PSU

Control

Audio/PSU

Driver

Switches
and Keys

MMI Drivers (AVR)

MMI Software

Radio Store

Fill Data

Frequency

Control

Power/Mode

Control

Transceiver

Driver

LCD

Radio
State

Environment

Software

Main

Controller/

Schedule

Software Update

Drive

Fill/Program/

Control

Software

Driver

EEPROM DSP

IIC Bus

Driver

DSP
Host

Battery

BATBUS

FPGA

Configure

Driver

Debug

Serial

Driver

PC

Serial

Port

Drive

BIT

Monitor

3.6.2 Environment

3.6.2.1 General

The H8 controller system is designed for minimum external bus activity and minimum current consumption. These
features are provided by the maximum use of low-current standby modes in H8, and an interrupt-driven architecture,
with a minimum of input polling. In radio standby and receive modes the only H8 tasks are the control of the
transceiver frequency and DSP mode as the radio scans and economizes. The most H8-intensive activities are
associated with user interactions, and operations on the fill/program/control port.

3.6.2.2 Scheduler

H8 operates with a simple scheduler that launches tasks after interrupt events. A time base interrupt of 10 ms is
used to keep track of time and poll inputs at regular intervals.

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Figure 3-4: Controller Software

3.6.2.2.1 Interrupt Sources

The following interrupt sources are used in H8.

Interrupt Source Description

User interface External interrupt from the keypad

DSP External interrupt from the DSP, signal detected, etc.

Low dc voltage External NMI from power supply indicates power supply fail

Timer Internal time base tick interrupt every 10 ms

PC serial port Internal interrupt from PC interrupt serial port

UI serial port Internal interrupt from user interface serial port, key press, and LCD data

Debug serial port Internal interrupt from DMA/timer

Alarm generator Internal interrupt from DMA/timer

3.6.2.2.2 Polled Inputs

The H8 software polls the following inputs at regular intervals.

Input Description

EXTPTT/RTS External PTT and data RTS

OOL Synthesizer out of lock

PWROFF On/off switch position

SENSE External keyfill device detect

The following analog inputs are measured as appropriate to the radio mode of operation.

Input Description

RSSI Receiver signal strength

WRU External device detect

BATT Main radio 10V supply monitor

PA TEMP Transmitter temperature

XTAL TEMP Reference crystal temperature

PA CURRENT Transmitter current

3.6.2.2.3 Watchdog

A regular watchdog service task is scheduled to prevent the H8 watchdog controller from overrunning, and a
hardware reset from occurring. The target watchdog timeout is 100/200 ms.

3.6.2.3 Start-Up Software

3.6.2.3.1 Boot Block Start-Up Software

The minimum simplest start-up software is provided in the boot block of the Flash. This software holds the keypad,
DSP, user interface, and FPGA in reset, and then establishes whether a valid H8 program image exists in the
program blocks of the Flash. If no valid program exists, a simple alarm sounds. The boot block software includes a
minimum basic BIT facility to check the code itself, and the internal and external random access memory (RAM).
The boot block code includes the software to allow programming of the program blocks through the PC serial port.

GUARDIAN VHF 110W MOBILE 3-17

3.6.2.3.2 Full Start-Up Software

If a valid H8 program image exists, the full start-up code executes. This involves initializing RAM, DSP, keypad,
user interface, FPGA, transceiver, etc., executing the start-up BIT, and transferring control to the main scheduler.

3.6.2.3.3 FPGA Configure Software

At start-up H8 configures the FPGA using data from the main Flash memory and transferring it via a synchronous
serial bus to the FPGA.

3.6.2.4 Shut Down Software

At normal shut down when the front panel on/off switch is off, the H8 software executes a clean shut down to the
transceiver, DSP, and user interface (UI), saves any usage data to the Flash, and releases the main power supply. In
cases where the power is removed, the low-power interrupt executes a minimum fast shut down, saving RAM data
as required, with no Flash update.

3.6.2.5 Debug Driver Software

The H8 controller includes software to implement an asynchronous serial port on two input/output (I/O) pins of H8.
Facilities provided include the ability to monitor particular radio variables, and to control specific variables. This
port allows PC serial access to the board during board-level factory testing, through the test connector.

3.6.3 Radio Store

All functional areas of the controller software, including the user interface, access the radio data store, fill control,
and radio software.

3.6.3.1 Physical Data Storage

The radio data is physically stored in 4 devices, all devices are accessible by the controller software.

3.6.3.1.1 H8 Internal RAM

The H8 controller has 2K x 8 of internal RAM. This data is not retained when the radio is switched off or the power
is removed. It is used for short-term storage of frequently accessed variables, stack workspace, etc. to minimize bus
activity when the H8 controller is running. The internal RAM is used as program space from which to execute
during some Flash update operations.

3.6.3.1.2 External RAM

H8 is provided with an external 128k x 8 bit RAM that is backed up for at least 30 seconds when the radio power is
removed, and at all times when a external power is applied with the radio switched off. This device is used as a
variable data expansion area, and stores specific user-entered data that must be retained over power interruptions
(unlock password, etc.).

3.6.3.1.3 Flash ROM

H8 has a 512k x 16-bit Flash read-only memory (ROM) used primarily for program storage. Data in the Flash is
retained permanently. Different areas of the Flash have different characteristics. The boot sector is a 16k block
used for the reprogramming software and the radio serial number. The data in this sector is programmed or block­erased only in the factory.

The Flash has 15-64k and 6-8k program blocks that can be block-erased and programmed by the boot block code
during normal reprogramming operations, without special equipment and without opening the radio. These blocks
are used for H8 and DSP operating software, radio fill data, and FPGA programming data. The Flash has two small
8k parameter blocks used for changing data that must be stored indefinitely, such as user specific settings and usage
data.

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3.6.3.1.4 Transceiver EEPROM

The radio transceiver has an 8k x 8 serial EEPROM for storing transceiver calibration data. This data is set during
production testing for the specific transceiver. The data in this device is essentially constant and is never written to
by the main controller. At switch on, contents of the EEPROM are copied into the external RAM; EEPROM is not
accessed during normal operation.

3.6.3.2 Data Types

The controller software uses a number of different data types.

3.6.3.2.1 Volatile Variables

Variable data used by the H8 controller that is not retained when the radio is switched off, is stored in the H8
internal RAM and the external RAM.

3.6.3.2.2 Short Term Stored Variables

Variable data retained while the radio is switched off or the power is interrupted, is stored in the external RAM.

3.6.3.2.3 Permanent Stored Variables

Variable data retained indefinitely is stored in the parameter blocks of the Flash. Every time this data changes, a
parameter block must be erased, and the new data written into the now blank parameter block.

3.6.3.2.4 Radio Fill Data

The frequencies, modes, and power levels are associated with different channels programmed into the radio. This
data is programmed into the radio through the fill port.

3.6.4 Program/Fill/Control Interface

The controller provides a serial port for PC access to allow the following functions:

Function Description

Programming To update radio software

Filling For modifying the radio data store of modes and frequencies, etc.

Control For controlling the radio operating mode

3.6.4.1 Radio Programming

The controller software allows reprogramming of the Flash memory program blocks, on a block-by-block basis.
During these operations, the controller executes from the boot sector of the Flash and no radio or user interface
operations are possible. After a programming operation, cycle the power on the radio. Programming operations are
initiated on receipt of a specific serial message on the PC serial port.

3.6.4.2 Radio Fill

The controller provides the facilities to modify the system, group, bank, and radio global data through the PC serial
port. This interface provides the following facilities:

Facility Description

Radio erase Delete all fill data in the radio

Selective erase

Radio fill Add specific systems, groups, banks, and global data to the radio store

Radio read Export the fill data contents of the radio store to the PC

Delete (mark as deleted) specific systems, groups, and banks (for
future use)

GUARDIAN VHF 110W MOBILE 3-19

All transfers and operations on the fill port are cyclic redundancy checked (CRC) and acknowledged.

3.6.4.2.1 Cloning

The radio can export channel data to other radios. Data export is initiated by a user interface operation at the
exporting radio. The exporting radio emulates a PC programmer during the data transfer.

Cloning of keyfill data

is not allowed.

3.6.4.2.2 Radio Keyfill

The DSP software manages the radio keyfill protocols.

3.6.4.3 Radio Control Port

It is possible for an external PC to control the functioning of the radio. This provides the following facilities:

• Radio status read to export the radio serial number, revision status, history, usage, etc.

• Set external control mode

• Set radio transmit frequency, power level, and mode

• Set radio receive frequency and mode

The transceiver mode control also allows transmission of 1 kHz test tones in analog modes, and BER test patterns in
digital modes. The receiver mode control allows the continuous (every 0.5 second) output of the bit error count per
frame in digital modes.

3.6.4.4 PC Serial Port Driver

The controller software controls the H8 serial port to implement the asynchronous data formats and baud rates
(9,600, 19,200, and 38,400) for the PC serial port. The serial port driver software also controls the 232OFF signal to
maintain the RS232 in its low-current standby state, except when data is driven out and while RTS is asserted.

3.7 User Interface

The radio interface is described in the following paragraphs.

3.7.1 Display

The radio has an 80 x 32 dot matrix LCD display. Some of the features of the display are:

Feature Description

Phone Indicated by an icon in the top, right of the display (for future use)

Scan Indicated by SCAN****, SRCH****, or ZONE**** flashing in the top row of the display

Encryption Indicated by a key icon

Power level Indicated by HI/LO/2W in the bottom row of the display

Priority scan Indicated by SCANP1 (P2), SRCHP1 (P2), or ZONEP1 (P2) flashing in the top row of the

display

Receive only channel Indicated by an RX in the bottom, left corner of the display

Talkaround Indicated by a TA in the bottom, left corner of the display

Repeater mode Indicated by a receiver icon in the bottom, left corner of the display

Emergency message EMG displays in the bottom, left corner when the radio is transmitting an emergency

message

3.7.2 Optional DTMF Microphone

The radio is programmed using DTMF microphone. For detailed instructions on programming the radio a DTMF
microphone, see the Guardian operator manual (G25AMK004).

3-20 GUARDIAN VHF 110W MOBILE

CHAPTER 4: INSTALLATION, ADJUSTMENT, AND OPERATION

4.1 Radio Configuration

4.1.1 Channels

A channel consists of a receive and transmit frequency pair. The radio has a total of 256 selectable channels. Each
channel can be programmed for different receive and transmit frequencies, squelch, modulation, encryption, and
power. Each channel can have one of possible 16 keys assigned on a channel-by-channel basis. An 8-character
alphanumeric label identifies each channel or by its channel number if no text label. Up to 7 shadow channels can
be added to each channel. They enable the radio to be used in several squelch/encryption modes on each physical
channel.

4.1.2 Zones

A zone is a group of channels. Each zone can be assigned up to 16 channels. The radio can store up to 16 zones, or
groups of channels. The zones can be assigned names of up to 8 alphanumeric characters and assigned to banks
during programming. Three zones can be selected by the toggle switch, 16 zones by the front panel keyboard.
Channels are mapped to the channel select switch positions using the Guardian PC programmer. When a zone is
active (selected), channels within the zone are selected using the 16-position channel select switch on the front panel
of the radio.

4.1.3 Banks

A bank is a group of zones. Zones are assigned to banks during programming. The radio can store up to 4 banks of
16 zones each. Banks are assigned names of up to 8 characters.

4.2 Installation and Adjustment

4.2.1 Hardware

Install using the Datron approved bracket.

4.2.2 Software

The manufacturer offers software updates when required. Software updates can be performed via an external port.
No radio disassembly is required.

4.3 Operating Procedures

4.3.1 Connect the Power Source

Use only the Datron approved power cable set, negative ground only.

4.3.2 Connect the Antenna

The antenna connects to the radio through a UHF antenna connector. For best VSWR, make sure to match the
antenna before operation.

4.3.3 Optional External Speaker

Use the accessory connector on the rear panel of the radio to connect the external speaker.

4.3.4 Radio Programming

Prior to the first time of operation, the radio must be programmed using the Guardian programming kit. For
information about programming a radio using the PC programmer, refer to the Guardian programming manual. For
PTT lockout during a programming sequence, refer to the Interface board description in Chapter 2.

GUARDIAN VHF 110W MOBILE 4-1

4.3.5 Radio Power Up

Turn on the radio using the on/off/volume knob. The radio performs a self-test and sounds a short medium-pitched
tone to indicate PASS. Use the switch to set the volume to a comfortable level. Select the desired channel using the
channel select switch. The process takes 3 to 5 seconds before the radio is ready for operation.

4.3.6 Choose a Channel

The default display shows the current zone and channel. Use the channel select switch to select a different channel
in the zone. To change zones, program one of the side keys, program the three-position toggle switch to zone select,
or program through the display using the select menu.

4.3.7 Transmit a Voice Message

Press the PTT switch on the palm microphone, hold the radio 2 to 6 inches from your mouth, and speak in a clear
voice.

4.3.8 Receive a Voice Message

To receive a voice message, release the PTT. Use the PC programmer or the radio program menu to set or adjust the
squelch level, CTCSS tones, DCS variables, NACs, and/or talk-group identifiers (TGIDs) as required.

4.3.9 Programming and Bypass Mode

For description of these features, refer to the Interface board section in Chapter 2.

4-2 GUARDIAN VHF MOBILE

CHAPTER 5: RADIO SET AND ACCESSORIES

5.1 System Description

The Guardian consists of the following components:

• Receiver/Exciter/Control Module (RECM)

• Front Panel Interface

• Motherboard

• Heatsink Assembly

For available accessories, contact a Datron Guardian representative.

5.1.1 Mobile Radio

The Guardian is a vehicular-mounted transceiver capable of providing secure and non-secure communications over
the 136 to 174 MHz RF range. The radio includes an LCD, emergency push button, speaker, microphone, multi­function accessory connector, three programmable function keys, 16-position channel select rotary knob,
on/off/volume rotary knob, 3-position programmable toggle switch, antenna connector, dc power connector, and two
LED status indicators. The Guardian features adjustable power output ranging from 25W to 110W. Operational
modes include:

• Clear analog voice FM, 12.5 and 25 kHz

• DES CVSD modulation voice, 25 kHz, 12 kbps

• Project 25 clear digital voice, 12.5 kHz

• DTMF overdial

5.1.2 Antenna

The antenna is a SO239 (UHF) jack mounted to the rear panel.

5.1.3 Guardian PC Programmer

Note: For some programming features, refer to the Interface board section in Chapter 2.

The Guardian programming kit is compatible with Windows 95/98/NT, capable of loading or modifying

programming information into the radio from a PC. It includes software, a detailed operator manual, and an RS232
compatible programming/cloning cable. The cable connects the PC serial port to the accessory connector on the rear
panel of the radio. See the Guardian programming manual for a complete description of PC programming. The PC
programmer is capable of programming the following settings:

BANK

ZONE

CHANNEL

Bank tag

Special channels: Priority channels 1 and 2, emergency channel, and home channel

Zones/available zones

Zone tag

Scan list

Channels/available channels

Channel tag

Channel type

Bandwidth

Receive only option

Options: Scan list, talkaround, and locked

Encryption: Enable, and key

Transmit Power: High and low RF power levels

GUARDIAN VHF 110W MOBILE 5-1

GLOBAL

KEY

Receive and Transmit Parameters: Operating frequencies, P25 NAC (digital),
talkgroup (digital), squelch mode/value (analog), and shadow channels

User (configuration name)

User ID P25

Keys and Switches: Auxiliary switch (1-3) function, toggle switch function, and
emergency button function

Programming Access: Programming enable, and programming password

Scan: Revert mode, scan delay, scan reply, and monitor time

Transmit: Transmit inhibit/override, and transmit time-out

Emergency: Alert mode, duration timer, and repeat timer

Key tag

Key ID

Key data

5.1.4 Cloning Cable

The Guardian G25AXG004 programming/cloning cable is used to transfer programming information (excluding
crypto keys and global parameters) from one radio to another radio. The cable connects to the radio accessory
connector on both the sending (source) and receiving (target) radios. Each cable end is labeled accordingly (source
and target) for ease of use.

5.2 Controls, Indicators, and Connectors

Consult the Guardian operator manual for detailed operating instructions.

5.2.1 Controls

The radio controls consist of a 16-position channel rotary knob, an on/off/volume rotary knob, a 3-position toggle
switch, 3 programmable function keys, an emergency push button, a PTT switch, and a 16-button keypad.

5.2.1.1 On/Off/Volume Rotary Knob

The on/off/volume knob located on the front panel of the radio is a 16-position rotary switch. The first position is
off, the second position is on with the speaker off (mute), and the remaining positions are used for increasing
volume levels.

5.2.1.2 16-Channel Rotary Knob

The channel select knob, located on the front panel of the radio, is used to rapidly switch between the programmable
16 channels.

5.2.1.3 3-Position Toggle Switch

The 3-position toggle switch located on the front panel of the radio is programmed using the PC programmer for
zone select, transmit encryption enabled/disabled, scan on/priority/off, high/low power, talkaround on/off, monitor
(squelch adjust) on/off, and disabled.

5.2.1.4 External Speaker Switch

The external speaker provides 10W of clear communications audio from the radio. Comes with data and speaker
cable. Set the speaker switch to
simultaneously.

I for internal speaker operation, E for external, or B for both speakers

5.2.1.5 PTT Switch

The PTT switch is located on the microphone.

5-2 GUARDIAN VHF MOBILE

5.2.1.6 Programmable Keys

Three programmable keys are located on the front panel of the radio. These keys are programmed using the PC
programmer for the following functions:

• Backlight dim/bright/off (for future use)

• Encryption on/off

• Scan list add/delete

• Keypad disable (for future use)

• Monitor on/off

• Scan on/priority/off

• Signal strength meter on/off

• Talkaround

• On/off

• Home channel

• Audible tones on/off (for future use)

• Next zone (future use)

• Open microphone (for future use)

• Previous channel (for future use)

• Disabled

5.2.1.7 Optional Emergency Button

Program the emergency button for emergency operation or for zeroize operation. If programmed for emergency
operation, pressing the button activates the emergency calling. The emergency condition remains active until
cleared by turning off the radio. When the emergency mode is activated, an emergency message is broadcast over
the emergency channel. There are two programmable modes: audio (full alert and silent), and display (alert and
silent). In full-alert mode, EMERGENCY flashes on the display and an audio tone is sounded. In silent mode, there
is no audio tone and no LED indication. If the emergency button is programmed for zeroize operation, all
encryption keys contained in the radio are erased.

5.2.1.8 Optional DTMF Microphone

The optional DTMF microphone includes a 12-button keypad with positive feedback on the front panel. The keypad
provides adjustable backlighting for nighttime viewing.

5.2.2 Indicators

5.2.2.1 LCD

The radio contains a full graphics 80 x 32 pixel LCD that uses characters and graphics to provide the operator with
radio operating information. The display provides backlighting for nighttime operation.

5.2.2.2 LED

The 3-color LED provides the operating status of the radio. The LED is viewable from front panel of the radio and
provides radio status as follows:

LED Indication

Red Transmitting

Green Receiving/busy channel indicator

Flashing green Receiving encrypted transmission

Orange Emergency/low dc power voltage

GUARDIAN VHF 110W MOBILE 5-3

5.2.2.3 Audible Tones

The radio has several audible tones that are activated by states of operation or by radio faults. These tones are
described in Chapter 9.

5.2.3 Connectors

5.2.3.1 Accessory Connector

The accessory connector is a DB25 connector located on the rear panel of the radio. This connector is used for
multiple functions, including PC programming, keyfill, cloning, external speaker, and audio accessory attachment.
The pin names and functions are defined in Chapter 10.

5.2.3.2 Antenna Connector

The antenna connector is a SO239 jack.

5.2.3.3 DC Power Connector

The dc power connector is a 9-pin D connector in the rear panel of the radio.

5.3 Transceiver Characteristics

The radio frequency range is 136 to 174 MHz with channel spacing of 12.5 or 25 kHz, tunable in 5 kHz steps.

5.3.1 Transmitter Characteristics

5.3.1.1 Transmitter Output

The transmitter output consists of a single channel FM carrier using either conventional 12.5 or 25 kHz FM
modulation, or 12.5 kHz compatible 4-level FM (C4FM). The signal source is analog or digitized voice signals.

5.3.1.2 Transmit Squelch

Transmit squelch parameters are required to enable selective squelch communications options. These parameters
are described below.

5.3.1.2.1 Analog Transmit Squelch

There are 3 types of analog transmit squelch:

Type Description

None No squelch is included with the analog transmit signal

CTCSS Sub-audible CTCSS squelch tones are included with the analog transmit signal

DCS DCS variables are superimposed on the analog transmit signal

5.3.1.2.2 Digital Transmit Squelch

There are 4 types of digital transmit squelch:

Type Description

None No squelch is included with the digital transmit signal

Network Access
Code (NAC)

TGID

A digital NAC is transmitted with the Project 25 digital transmit signal. The
primary purpose of this code is to allow the user access to a repeater network

A digital TGID is transmitted with the Project 25 digital transmit signal. The
primary purpose of this selective digital calling identification is to group users into
functional teams

5-4 GUARDIAN VHF MOBILE

Type Description

Individual Call

TGID is automatically set to 0000 (hex) and the user ID of the targeted radio is
activated within the Project 25 digital transmit signal

5.3.2 Receiver Characteristics

5.3.2.1 Receiver Performance

The receiver is capable of demodulating a single-channel FM carrier using either conventional 12.5 kHz FM, 25 kHz
FM, C4FM, or compatible quadrature phase shift keying (CQPSK) modulation. The receiver demodulates analog or
digital voice and data signals. The radio circuitry receives clear messages while operating in secure mode, and
secure messages while in the clear mode, if encryption is enabled.

5.3.2.2 Receive Squelch

5.3.2.2.1 Analog Receive Squelch

There are 3 types of analog receive squelch:

Type Description

Carrier (noise) Squelch is opened on any intelligible analog signal

CTCSS Squelch is opened on any analog signal having the correct CTCSS tone

DCS Squelch is opened on any analog signal having the correct DCS variable

5.3.2.2.2 Digital Receive Squelch

There are 4 types of digital receive squelch:

Type Description

Monitor

Normal Squelch is opened on any digital signal having the correct NAC

Selective Squelch is opened on any digital signal having the correct NAC and TGID

Individual call

Squelch is opened on any intelligible digital signal. The NAC and talkgroup ID do not
have to match

Squelch is opened on a digital signal having a TGID of 0000 (hex) and a user ID matching
that of the receiving radio

5.4 Communication Security

The radio is capable of secure communication by means of type-3, software-based encryption, and is fully
compatible with any radio using Project 25 DES encryption. When the radio is operating in the secure mode, the
transmission of all tone squelch signals is disabled.

5.4.1 Algorithms

The radio is capable of single-bit cipher feedback (SBCF) DES (compatible with other manufacturers) 25 kHz
channels.

5.4.2 Keyfill

Keyfill is accomplished through the radio accessory connector using the PC programmer. The PC programming
cable is used to load the keys. The radio can store up to 16 encryption keys. The radio retains encryption keys until
they are rewritten or zeroized.

GUARDIAN VHF 110W MOBILE 5-5

5.4.3 Zeroize

The radio can be programmed using an optional, external emergency key to zeroize all encryption keys. Using the
programming menu, the radio can also zeroize all encryption keys, or selectively zeroize individual encryption keys.
The emergency key is programmed using the PC programmer.

5-6 GUARDIAN VHF MOBILE

CHAPTER 6: SERVICING THE RADIO

6.1 General

There are no user serviceable parts in the Guardian radio. Return it for servicing to the manufacturer after
requesting an RMA number. Attempts to service the Guardian radio by non-authorized personnel voids the
warranty.

6.2 Self-Test at Power Up

At radio switch-on, the H8 controller executes a number of tests to confirm correct operation. Any errors are
reported to the user through displayed error messages and logged in the Flash. The tests implemented include:

• Flash checksum CRC

• RAM read and write

• FPGA configuration

• DSP host interface

• Keypad interface to AVR

• DC bus interface

• Transceiver EEPROM interface

• Synthesizer lock tests top and bottom frequencies, lock time, etc.

6.3 Caution

Repair of some parts of this unit require special tools and soldering techniques not normally available in a field
service environment. DWC highly recommends the module subassemblies be returned to the factory for service.
Damage can easily occur from repair attempts by non-trained personnel.

GUARDIAN VHF 110W MOBILE 6-1

CHAPTER 7: TROUBLESHOOTING

7.1 Introduction

This chapter is included to help qualified service personnel troubleshoot and repair the Guardian radio. If questions
or problems arise, contact Datron Technical Support Services Group, Datron World Communications Inc., 3030
Enterprise Court, Vista, CA 92083, or phone [phone], or email to: [e-mail]
additional troubleshooting information, refer to the following sections of this manual:

• Chapter 2: Hardware Theory of Operation

• Chapter 3: Software Theory of Operation

• Chapter 4: Installation, Adjustment and Operation

• Chapter 11: Schematics

This chapter contains basic functional tests. Once the problem is corrected, restart the tests.

7.2 Radio Functional Tests

The tests in this chapter require the radio to be tested as programmed. It is best to program all 3 auxiliary buttons to
Hi/Lo power, the emergency button to emergency, and the toggle switch to zone select. Program the radio with
eighteen channels, 3 zones, and 1 bank. Put 16 channels in zone 1, 1 channel in zone 2, and 1 channel in zone 3. For
all of the channels, use assigned transmit and receive frequencies, turn transmit squelch off, and set receive squelch
to carrier, level 8. When more than one remove and receive tasks are shown in a block, they are listed in order from
most to least probable for fixing the problem. It is recommended that the remove and repair tasks are tried one at a
time, and the radio re-tested until the problem is fixed.

The tests outlined below provide an overall check of the radio to ensure it is working properly.

. For

7.2.1 Power-On Test

This test ensures that the radio turns on, the latest software version number briefly appears, a beep is heard, and an
operational screen appears on the LCD.

7.2.2 Buttons and Switches Test

This test ensures that the PTT, auxiliary buttons, toggle switch, emergency key, keypad, on/off/volume switch, and
channel switch work.

7.2.3 Transmit Test

This test ensures the radio has the required transmit power, frequency accuracy, and deviation.

7.2.4 Receive Test

This test ensures the radio LED works, a 1 kHz tone is heard, and that SINAD is within specified limits.

7.2.5 Audio Test

This test ensures that the radio’s internal speaker and microphone are working. If the radio fails this test, please
contact Datron for radio servicing.

GUARDIAN VHF 110W MOBILE 7-1

7-2 GUARDIAN VHF MOBILE

CHAPTER 8: DEFINITIONS

Alert Mode: Display and audio properties are used when the emergency key is pressed. In normal mode, the display

flashes EMERGENCY and an audio tone is heard. In silent mode, the display is blank and no audio tone is heard.

Analog-to-Digital Converter (ADC): An electronic device for converting data from analog to digital form for use
in electronic equipment.

Backlight: The light behind the keypad and LCD enables the keys and LCD to be visible in dark conditions.

Backlight Delay: The time the backlight remains on after the last keypad activity.

Bandwidth (BW): A small range of frequencies around a transmit or receive frequency in which a message can be

received or transmitted.

Bank: A group of zones. There are up to 4 banks per radio. Up to 16 zones can be distributed through these
4 banks.

Channel: A memory location with defined receive, transmit, squelch, modulation, and power settings. There are
256 channels per radio.

Channel Locked: An indicator informing that channel settings cannot be programmed using the LCD and keypad.
The settings can only be changed using the PC programmer.

Channel Scan: Scans all channels on the scan list in a given 16-channel zone. The scan starts on the home channel,
checks each channel in the scan plan, returns to the home channel, and then scans each channel in the scan plan.

Common Air Interface (CAI): The CAI standard allows interoperability within any Project 25 system provided
they are all in the same frequency band.

Continuous Tone-Controlled Squelch System (CTCSS) Tone: A sub-audible tone superimposed on an analog
signal to reduce interference from traffic and background noise.

Digital Coded Squelch (DCS): A digital variable superimposed on a digital signal to reduce interference from
traffic and background noise.

Digital Signal Processor (DSP): Handles all signal-processing functions.

Digital to Analog Converter (DAC): A device that takes a digital value and outputs a voltage that is proportional to

the input value.

Dual-Tone Multiple-Frequency (DTMF): A signaling scheme used by the telephone system in which two-voice
band tones are generated for each keypad key press.

Global Search: Scans all frequencies programmed into the radio, regardless of scan list designation.

Initial Synchronization: The length of time required for the radio to perform encryption synchronization.

Microprocessor Unit (MPU): A computer’s entire CPU is contained on one (or a small number of) integrated
circuit.

Monitor Receive Squelch: The radio receives any intelligible analog transmission.

Monitor Timer: The amount of time the radio stays on a channel picked up during the scan and before the radio

reverts back to scan mode.

Network Access Code (NAC): Selective squelch for digital mode. The primary purpose is to allow the user access
to a repeater network. In radio-to-radio communications, these codes are used to eliminate interference from other
traffic and background noise.

Normal Receive Squelch: The radio receives any transmission having the correct NAC.

Priority 1 Scan: Priority 1 channel is sampled during scanning, receive of an active channel, or standby. Activity

on the priority1 channel overrides all other modes except emergency.

GUARDIAN VHF 110W MOBILE 8-1

Priority 2 Scan: Priority-2 channel is sampled in a similar fashion to the priority-1 channel. Activity on the
priority-2 channel overrides all other modes except emergency and priority 1.

Receive Only Channel: A feature that does not allow outgoing transmissions on the channel. It is used for channels
in which transmission is prohibited (i.e., weather channels). If PTT is pressed on a receive-only channel, RX ONLY
appears on the display.

Receiver/Exciter/Control Module (RECM): Transceiver module containing all radio functions except RF/audio
amplifiers and display/keypad circuitry.

Repeater Delay: A delay timer used to prevent a radio from receiving its own transmission from a tactical repeater.

Scan Delay: The amount of time the scanner dwells on an active receive channel after the carrier is dropped. This

prevents another message from being received before a response can be made.

Scan Reply: If a PTT press interrupts the scan delay timer, this is the amount of time allowed to ensure a reply to a
received message.

Scan List: A group of channels in a zone that are designated as active scan list channels. Channels are added or
deleted from the scan list using the PC programmer or the radio keypad.

Scan Revert Channel: The transmit channel that the radio reverts to when PTT is pressed during or following a
scanned message.

Search Mode: The radio scans for and opens on carrier only regardless of CTCSS, DCS, or the digital ID.

Selective Receive Squelch: The radio receives any transmission having the correct NAC and TGID.

Shadow Channel: The radio of primary channels, each of which can have up to 7 shadow channels. A shadow

channel has the same transmit and receive frequencies, options, and transmit power levels as its primary channel.
Individual shadow channels can be configured for different channel types (analog or digital), BW (12.5 or
25 kHz for analog channels), squelch modes, P25 NACs (digital channel only), and encryption key (only one primary
or shadow channel can have CVSD DES enabled). When properly configured, shadow channels can be created to
allow a user to hear all transmissions on a receive/transmit frequency regardless of channel type, BW, squelch mode,
or encryption. Shadow channels are created and their settings edited using the PC programmer.

Talk Group Identifier (TGID): Selective squelch for the digital mode, used to group users into functional teams.

Transmit Inhibit and Override: A feature that stops users from talking over other radio conversations. There are

three options: CARRIER prevents transmission if any activity is detected on the channel, TONE prevents
transmission on an active channel with a squelch code other than your own, and NAC prevents transmission on an
active channel with the same NAC. There is a quick-key override feature available that allows a user to override the
transmit inhibit state by quick-keying the radio (i.e., 2 PTT presses within a short time frame).

Transmit Timeout: Prevents inadvertent or prolonged transmit operations.

User Interface: The same as a man-machine interface.

Zone: A group of channels. There is a maximum of 16 zones per radio and each zone can contain up to 16 channels.

Three zones can be selected using the toggle switch or 16 zones selected by the radio keypad.

Zone Scan List: A group of zones in a bank designated as active scan list zones. Zones are added or deleted from
the scan list using the PC programmer or the radio’s keypad.

8-2 GUARDIAN VHF MOBILE

CHAPTER 9: SIGNAL TONES

Tone Signal Cause

Brief low-pitched

Steady low-pitched

Brief medium-pitched

Brief high-pitched Low dc supply voltage DC supply voltage falls below a preset value
Repeated high-pitched Individual call An individual call is received

Key press error Invalid key pressed

Failed power on self-test (POST) Radio fails POST

Transmit time-out warning Time-out about to interrupt PTT

Empty channel warning

No RX/TX frequencies programmed for the
channel

Transmit time-out timed out Transmit time is exceeded and PTT still pressed

Transmit inhibit

PTT switch is pressed and there is activity on the
transmit channel

Invalid mode No programmed data on the selected channel

Radio locked

Radio locks after 3 consecutive wrong password
attempts

Key press Valid key press is accepted by the radio

Radio passed POST Radio passed POST
Clear voice received Radio is receiving a clear signal
Emergency call state Emergency button is pressed Repeated medium-pitched

Key error Encryption is selected but no key is present

GUARDIAN VHF 110W MOBILE 9-1

9-2 GUARDIAN VHF MOBILE

CHAPTER 10: CONNECTOR PINOUTS

10.1 Accessory Connector Pins and Functions

Pin Signal Name Description

1 RS232_RXD Receive data line output (DCE), RS232 level

(>+3V=ZERO, <-3V=ONE)

2 RS232_RTS Data port control input (DCE), RS232 level (>+3V=ON, <-3V=OFF)
3 SERIAL_CLOCK Synchronous clock output to PC terminal (DCE), RS232 level

(>+3V=ZERO, <-3V=ONE)

4 RS232_CTS Data port control output (DCE), RS232 level (>+3V=ON, <-3V=OFF)
5 PC_232RXD Programming receive data line output (DCE), RS232 level

(>+3V=ZERO, <-3V=ONE)

6 SQUELCH_INF Squelch, low on valid receive signal, 7.8V squelched
7 GND Ground
8 EXTERNAL_SPEAKER_N Balanced audio output from RECM, 500 mW into 8 ohms
9 EXTERNAL_PTT/KID PTT input asserted by voltage closure to ground or pseudo-random key

insert data, LVTTL level input

10 7.7V Test point for internal regulated voltage supply
11 EXTERNAL_MIC/WE Microphone input or key transfer indicator input, asserted by voltage

0.8 Vdc

12 GND Ground
13 INTERNAL_SPEAKER_P Balanced audio input from external device; can override RECM audio

output signal

14 PTT_SWITCH PTT input asserted by voltage closure to ground
15 RS232_DTR Data port control input (DCE), RS232 level (>+3V=ON, <-3V=OFF)

16 PC_232TXD Programming transmit data line input (DCE), RS232 level

(>+3V=ZERO, <-3V=ONE)

17 RS232_TXD Transmit data line input (DCE), RS232 level

(>+3V=ZERO, <-3V=ONE)

18 WRU_MONITOR Voltage input identifies external device
19 EXT_10W_SPEAKER_N Balanced audio output for external 10W 4-ohm speaker
20 EXT_10W_SPEAKER_P Balanced audio output for external 10W 4-ohm speaker
21 EXTERNAL_MIC_BIAS/KEY Microphone bias or bi-directional key data, LVTTL levels
22 EXTERNAL_SPEAKER_P/KLD Balanced audio output from RECM, 500 mW into 8 ohms or LVTTL

low-output level when keyloader is connected

23 EMERGENCY_SWITCH Active low control to transmit emergency signal
24 IGN_SW Power switch override input. Ground forces off, open enables switch

25 INTERNAL_SPEAKER_N Balanced audio input from external device; can override RECM audio

GUARDIAN VHF 110W MOBILE 10-1

output signal

10.2 Power Connector Pins and Functions

Pin Signal Name Description

1 BATTERY Battery power

2 GROUND Ground

3 IGN_SW Ignition switch

4 EXTERNAL_10W_SPEAKER_N External speaker

5 EXTERNAL+10W_SPEAKER_P External speaker

6 BATTERY Battery power

7 GROUND Ground

8 GROUND Ground

9 EMERGENCY_SWITCH Emergency switch

10.3 Microphone Jack Connector Pins and Functions

Pin Signal Name Description

1 EXTERNAL_MIC_BIAS/KEY Keyload line

2 GROUND Ground

3 INTERNAL_MIC Microphone audio

4 EXTERNAL_MIC/WE Keyload line

5 PTT_SWITCH Push-to-talk line

6 BIAS(+) Microphone power

7 EXTERNAL_SPEAKER_P/KLD Keyload line

8 EXTERNAL_PTT/K1D Keyload line

10-2 GUARDIAN VHF MOBILE

CHAPTER 11: SCHEMATICS

GUARDIAN VHF 110W MOBILE 11-1

11

994466

A

14-May-2002 11:06:32994466A.Sch

Title:

Size: Drawin g N u mber:

Date:File:

Rev:

Sheet of

Time:

SCHEMATIC, KEYPAD/DISPLAY

Schematic

Date:

Date:

Appr:

Drawn:

REV ECN DESCRIPTION DATE APPR

3030 Enterprise Ct.
Vista, CA 92083
[phone]

B

LCD_CLOCK

LCD_TX
LCD_CS_N

LCD_RESET_N
LCD_DATA_MODE

V3.3_LCD

AUXILLARY_SWITCH_1
AUXILLARY_SWITCH_2
AUXILLARY_SWITCH_3

S4

ENTER

S3

MENU KEY 3

S2

MENU KEY 2

S1

MENU KEY 1

KEYPAD_SCAN_OUT_1
KEYPAD_SCAN_OUT_2
KEYPAD_SCAN_OUT_3

KEYPAD_SCAN_IN_1

KEYPAD_SCAN_IN_2

S5

MENU KEY 1

S6

MENU KEY 1

S7

MENU KEY 1

LCD_CLOCK

LCD_TX

LCD_CS_N

LCD_RESET_N
LCD_DATA_MODE

V3.3_LCD

AUXILLARY_SWITCH_1
AUXILLARY_SWITCH_2
AUXILLARY_SWITCH_3

KEYPAD_SCAN_OUT_1
KEYPAD_SCAN_OUT_2
KEYPAD_SCAN_OUT_3
KEYPAD_SCAN_IN_1
KEYPAD_SCAN_IN_2

ABE SABET 04-12-01

A 02-0128 RELEASE 02-19-02

+7.7V

+7.7V

C1
.01

PART OF LCD MODULE 320803

LCD_BACKLIGHT

LCD_BACKLIGHT

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

P13

620171

8

1

2

3

4

5

6

7

10

9

J9

080010002

C2
.01

BB

C3
.01

E1

E2

11

994478

A

14-May-2002 10:55:16994478A.Sch

Title:

Size: Drawing Number:

Date:File:

Rev:

Sheet of

Time:

D

AUDIO AMP BD, GUARDIAN 100W MOBILE

Schematic

Date:

Date:

Appr:

Drawn:

REV ECN DESCRIPTION DATE APPR

3030 Enterprise Ct.
Vista, CA 92083
[phone]

INT_5W_SPEAKER_P

INT_5W_SPEAKER_N

INTERNAL_SPEAKER_P

AUDIO_INTERNAL_DISABLE

R10
10K

EXTERNAL_10W_SPEAKER_N

EXTERNAL_10W_SPEAKER_P

INTERNAL_SPEAKER_N

AUDIO_EXT_DISABLE

+IN1

1

--IN1

2

GND1

3

Vref

4

OUT1

5

BS1

6

GND2

7

BS2

8

OUT2

9

Vp

10

M/SS

11

RR

12

+IN2

13

U2

TDA1516BQ

C5
1uF/25V

C4
1uF/25V

R16
10k

R15
10k

R33
10k

R13
10k

R14
10k

R19
10k

SWBAT

R4
0ohm

R5
0ohm

+IN1

1

--IN1

2

GND1

3

Vref

4

OUT1

5

BS1

6

GND2

7

BS2

8

OUT2

9

Vp

10

M/SS

11

RR

12

+IN2

13

U1

TDA1516BQ

C1

1uF/25V

C2
1uF/25V

R9
10k

R8
10k

R21
10k

R6
10k

R7
10k

R12
10k

SWBAT

R2
0ohm

R3
0ohm

C14

0.1uF

C15

0.1uF

C22

47uF,20V

C21

47uF,20V

C19

47uF,20V

C20

47uF,20V

INTERNAL AUDIO AMPLIFIEREXTERNAL AUDIO AMPLIFIER

C3

1uF/25V

C6

1uF/25V

R17
10K

C7

1nF

C8
1nF

R18
10k

R11
10k

Q5
2N7002

R43
0ohm

C55

1uF/25V

J4

OSMT

C9
1nF

C10
1nF

L1

2.7uH

R46

100k

R23
1k

R24
1k

R44
100K

R34
10k

R26
10k

R22
10k

R35
10k

R27
300

R38

2.67K-1%

R30
10k

R32
10k

R28
10k

PA_PTT

3
2

1

U4A

LM2903

4 8

VCC

GND

U3C
LM2904

1

2
3

U3A

LM2904

Q7
2N7002

7.8Vsw

LED_TX

7.8Vsw

C16

0.1uF

C53
10uF

EMERGENCY_SWITCH

EXTERNAL_10W_SPEAKER_P

EXTERNAL_10W_SPEAKER_N

L2

10uH

C13
1nF

SWBAT

RS232_RTS

SQ_INF

RS232_CTS

EXTERNAL_10W_SPEAKER_N

RS232_DTR

EXTERNAL_10W_SPEAKER_P

RS232_TXD

RS232_RXD

INTERNAL_SPEAKER_P

PC_232TXD

SERIAL_CLOCK

PC_232RXD

EXTERNAL_MIC/WE

EXTERNAL_PTT/KID

EXTERNAL_SPEAKER_N

PTT_SWITCH

WRU_MONITOR

EXTERNAL_MIC_BIAS/KEY

EMERGENCY_SWITCH

EXTERNAL_SPEAKER_P/KLD

7.8Vsw

INTERNAL_SPEAKER_N

1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13

J6

610458

FB23

FB22

FB21

FB20

FB19

FB17

FB16

FB15

FB14

FB13

FB12

FB11

FB10

FB9

FB8

FB7

FB6

FB5

FB4

C52
100pF

FB18

C26

100pF

C27

100pF

C28

100pF

C29

100pF

C30

100pF

C31

100pF

C32

100pF

C35

100pF

C36

100pF

C38
100pF

C39

100pF

C41

100pF

C42

100pF

C43

100pF

C44

100pF

C45

100pF

C46

100pF

C47

100pF

C48

100pF

C50

100pF

C51

100pF

C40
100pF

C49

100pF

R36
10k

ON/OFF

R39

1.27k-1%

Q9
MMBT2222

R45
0OHM

FB1 FB2

SWBAT

C17

0.1uF

C33
100pF

C34

100pF

C25
.01uF

C37
100pF

FB3

E1
PAD

E2
PAD

C12

1nF

5
6

7

U4B

LM2903

8

4

U4C
LM2903

SWBAT

C18

0.1uF

7

5

6

U3B

LM2904

R37
0ohm

R53
10k

R55
560

R54

1.82K-1%

J3

1
2
3
4
5

6
7
8
9

J5

610457

2

4

1

3

7,8 5,6

Q10
IRF7328

FB24

D3

4148

R60
10k

C58

1nF

R56

1.05K,1%

R52
10k

7.8Vsw

7.8Vsw

IGN_SW

IGN_SW

PF1

550044

PANEL MNT

VBAT

7.8Vsw

C56
1uF/25V

R41

51.1K-1%

Q8

10K/10K

3
2

1

U6A

LM2903

8

4

U6C
LM2903

5
6

7

U6B

LM2903

R20
100k

R1
200k

7.8Vsw

Q1
2N7002

R29
100

R40
10k

7.8Vsw

R50

2.67K

C82
1uF/25V

C57

DNP

Vout

2

1

+Vin

3

ADJ

U5
LM350T

C11
10uF

R51

12.7K

R47
100K

Q3

MMBT2907

Q2

MMBT2222

R49

1.05K,1%

SWBAT

C23

0.1uF

R48
10k

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

J1

613507

1

2

3

4

5

6

7

8

9
10
11
12
13
14
15
16
17
18
19
20

J2

613507

3.3V VBAT SWBAT 7.8V

FB25

Q12
IRLML6302

Q11
2N7002

ON/OFF

R62

10K

7.8V

D1
1N6278

D4
1N6278

Q15
2N7002

Q14

2N7002

Q13

2N7002

Q16

MMBT2222

R63
100k

R64
100k

7.8Vsw7.8Vsw

7.8Vsw

R65
100k

C24
1uF/25V

PTT_SWITCH

TP21

3.3V SWBATVBAT 7.8V

R66
DNP

R67

0OHM

R69
10k

R68
270

ON/OFF

PA_PTT

LED_TX

INT_5W_SPEAKER_N

INT_5W_SPEAKER_P

AUDIO_INTERNAL_DISABLE

AUDIO_EXT_DISABLE

INTERNAL_SPEAKER_P

INTERNAL_SPEAKER_N

EXTERNAL_SPEAKER_P/KLD

EXTERNAL_MIC_BIAS/KEY

WRU_MONITOR

RS232_TXD

PC_232TXD

RS232_DTR

EXTERNAL_MIC/WE
EXTERNAL_PTT/KID

PC_232RXD

RS232_CTS

SERIAL_CLOCK

RS232_RTS

RS232_RXD

EXTERNAL_SPEAKER_N

7.8V

PTT_SWITCH
SQUELCH_INDICATOR

IGN_SW
EMERGENCY_SWITCH

3.3V

TP21

BIAS

BIAS

VBAT_TP

VBAT_TP

C54
1nF

R25

6.2K

FD1FD2FD3

BOM:125-50220

PCB:738534

C38

DNP

R31

0OHM

R42

0OHM

R57

0OHM

11

994483

A

14-May-2002 10:56:49994483A.sch

Title:

Size: Drawing Number:

Date:File:

Rev:

Sheet of

Time:

D

GUARDIAN MOBILE, 110WPA

Schematic

Date:

Date:

Appr:

Drawn:

REV ECN DESCRIPTION DATE APPR

3030 Enterprise Ct.
Vista, CA 92083
[phone]

C26
.01uF

C37

1nF

L7
68nH

E2

E1

C62

47uF,20V

C63

47uF,20V

C35
1uF/25V

SWBAT2

R36

1k

C32
.01uF

C28
.01uF

BATT+

BATT-

C14

0.1uF

C16
1uF/25V

R40
DNP

C10
DNP

4 8

VCC

GND

U6C
LM2904

D1

MMBD4148

R28
0ohm

1

2

3

U3A

LM2904

C1
100pF

C11

DNP
R12
10k

1

2

3

U4A
LM2904

C20

1uF/25V

R8

0.01ohm-1%

SWBAT1

C9
100pF

C3

100pF

L3

74nH
C72
DNP

R25
10K

1

2

3

LM35

U12

LM35

TEMP SENSOR

Q9
IRF4905

C39
1nF

C17
1uF/25V

C27
.01uF

FB2
FB

C23

1uF/25V

C8

100pF

C94

2.2pF

C105

1nF

R75

8.25k

C33

DNP

R15
10k

R87
402k

R85

6.19k

R86

5.62k

R2
100k

R6
100k

C67

.001uF

C66

.001uF

R26
1k

C53

1nF

C54

18pF

D10
1N6278

OUT

1

Vin+

3

V+

5

GND

2

Vin-

4

U1
DNP

C55

6.8pF

C81
DNP

R39

1k

C29
.01uF

C40

1nF

C64

47uF,20V

C65

47uF,20V

C30
.01uF

C19

0.1uF

C21
1uF/25V

R42
DNP

C12
DNP

7

5
6

U6B

LM2904

D3

MMBD4148

R30
0ohm

C2
100pF

C13
DNP

R19
10k

4 8

VCC

GND

U3C
LM2904

C4

100pF

Q10
IRF4905

C22
1uF/25V

C31
.01uF

C34

DNP

R22
10k

R57

20.5k

R4
100k

C58
18pF

OUT

1

Vin+

3

V+

5

GND

2

Vin-

4

U2
DNP

M68702H

RF_IN

1

DC12DC2

3

RF_OUT

4

GND

5

U9
701363

M68702H

RF_IN

1

DC12DC2

3

RF_OUT

4

GND

5

U10
701363

Vdet

R18
10k

R11
10k

Vdet

Vtemp

Vdet

D4

MMBD4148

Vtemp

D2

MMBD4148

Vtemp

Vref

R33

1k

R32

1k

4 8

VCC

GND

U4C

LM2904

C15

1uF/25V

7

5
6

U4B
LM2904

C106
DNP

4

3
5

112

9

10
8

K2

TX2SA-5V-X

4

3
5

112

9

10
8

K1

TX2SA-5V-X

D14

6.8V

SWBAT1

C51

1nF

C49
1nF

FB5

FB

L1

115uH

ANTENNA

RADIO

FB4FBFB3

FB

C47
1nF

C48
1nF

L12

2.7uH

7

5
6

U3B
LM2904

4 8

VCC

GND

U7C

LM2904

1

2

3

U6A

LM2904

C25
1uF/25V

SWBAT1

R55

0.01ohm-1%

R63

100k

SWBAT1

7

5

6

U7B

LM2904

Q12
2N7002

R37

20.5K
R27
10k

R59

20.5K

R58

20.5K

SWBAT2

Vref

R3
68k

R5
100k

Vref

C98

0.1uF

C100
10uF

C18

1uF/25V

R7
10k

1

2
3

U7A

LM2904

D5

MMBD4148

R20

5.62K 1%

R34

1k

R48
100k

Vdet

R66
0ohm

D13

6.8V

R88

1.8K

R72

100-1/2W

R71

100-1/2W

SWBAT1

Q11
2N7002

R62

100k

C99

0.1uF

D12

6.8V
C50

1nF

C52
1nF

C46
1nF

R50
10ohm

R51
10ohm

C41
1nF

C38
1nF

C70
10pF

C73
DNP

C95

2.2pF

C57
DNP

C69

.001uF

C68

.001uF

C103

6.8pF

C5
1uF/25V

7

5
6

U8B

LM2904

SWBAT2

1

2

3

U8A

LM2904

4 8

VCC

GND

U8C
LM2904

J1

080002001

J2

610551

R92
0ohm

R31
1k

R41
1k

D15

6.8V

R89
68K

R21

7.5K

Q4

MMBT2222

R46

2.7K

R14
330

C80

150pF

C82
150pF

C83
DNP

C84

4.7pf

C43
10pF

C71

12pF

L4
68nH

L2

74nH
C60
DNP

C75

2.2pF

C42

6.8pF

C77
DNP

C56
10pF

C61
DNP

C76

2.2pF

C78
DNP

C59
10pF

C74

12pF

R13

51.1K

R61
100k

E4

E5

E7

E6

E3

+

-

CHASSIS

GND

R17

150-1/2W

R23

150-1/2W

R24

150-1/2W

R29

150-1/2W

R35

150-1/2W

R38

150-1/2W

4

2

3

1

T1

CURRENTXFMR

R44
100

R47
100

VR1
10K/11T

R9
100K

Q6

DTA114EKA

Q5
2N7002

Q8

DTA114EKA

Q7
2N7002

COAX BYPASS-WHEN INSTALLED

R49
DNP

R67
150

R65
150

R64

150

R60

150

D8

MMBD4148

Q13

MMBT2222

Q14
MMBT2222

Q15
MMBT2907

R53
10k

R69
10k

R68
10k

D7

MMBD4148

D6

MMBD4148

R45
100k

R52
68K

R54

30.1K

C79

1uF/25V

Q1

TPC8106-H

Q17
TPC8106-H

Q2

TPC8106-H

Q18
TPC8106-H

R1
10k

Q3

TPC8106-H

Q19

TPC8106-H

Q16

TPC8106-H

Q20
TPC8106-H

D9
1N6278

C6

1uF/25V

1

2

3

U5A

LM2904M

7

5
6

U5B

LM2904M

4 8

VCC

GND

U5C
LM2904

C24
1uF/25V

SWBAT1

1

2

3

U11A

LM2904M

7

5
6

U11B

LM2904M

4 8

VCC

GND

U11C
LM2904

C7
1uF/25V

SWBAT2

Q22

2N7002

R81

DNP
R80
DNP

R82
DNP

R76
15K

R74
15K

R43

4.99K

R56

4.99K

Q21

2N7002

R79

DNP
R78
DNP

R77
DNP

R70
15K

R73
15K

R10

4.99K

R16

4.99K

FD1
FDU

FD2
FDU

FD3
FDU

PCB:738536

BOM:125-50110

SWBAT2

SWBAT2

R84

1K
R83
DNP

D11

MMBD4148

C36

100pF

C44

DNP

C45
DNP

11

994484

A

14-May-2002 10:57:49994484A.sch

Title:

Size: Drawing Number:

Date:File:

Rev:

Sheet of

Time:

D

GUARDIAN 100W MOBILE, CONTROL BD

Schematic

Date:

Date:

Appr:

Drawn:

REV ECN DESCRIPTION DATE APPR

3030 Enterprise Ct.
Vista, CA 92083
[phone]

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

11

11

12

12

13

13

14

14

15

15

16

16

17

17

18

18

19

19

20

20

21

21

22

22

23

23

24

24

25

25

26

26

27

27

28

28

29

29

30

30

31

31

32

32

33

33

34

34

35

35

36

36

37

37

38

38

39

39

40

40

41

41

42

42

43

43

44

44

45

45

46

46

47

47

48

48

49

49

50

50

51

51

52

52

53

53

54

54

55

55

56

56

57

57

58

58

59

59

60

60

61

61

62

62

63

63

64

64

65

65

66

66

67

67

68

68

69

69

70

70

71

71

72

72

73

73

74

74

75

75

76

76

77

77

78

78

79

79

80

80

J1

610354

LCD_CLOCK
LCD_TX

LCD_CS_N
LCD_RESET_N
LCD_DATA_MODE

KEYPAD_SCAN_OUT_1
KEYPAD_SCAN_OUT_2
KEYPAD_SCAN_OUT_3

KEYPAD_SCAN_IN_3
KEYPAD_SCAN_IN_4
KEYPAD_SCAN_IN_5
KEYPAD_SCAN_IN_6

INTERNAL_SPEAKER_P
INTERNAL_SPEAKER_N

INTERNAL_MIC

INTERNAL_PTT
AUXILLARY_SWITCH_3
AUXILLARY_SWITCH_2
AUXILLARY_SWITCH_1

VOLUME_SWITCH_1
VOLUME_SWITCH_2
VOLUME_SWITCH_3
VOLUME_SWITCH_4
TOGGLE_SWITCH_1
TOGGLE_SWITCH_2

CHANNEL_SWITCH_1
CHANNEL_SWITCH_2

CHANNEL_SWITCH_4

CHANNEL_SWITCH_3

EMERGENCY_SWITCH

LED_RED_N_SYS
LED_GREEN_N

EXTERNAL_MIC_BIAS/KEY
EXTERNAL_MIC/WE

WRU_MONITOR
EXTERNAL_PTT/KID

EXTERNAL_SPEAKER_N

EXTERNAL_SPEAKER_P/KLD

PC_232TXD

PC_232RXD

RS232_RTS

RS232_CTS

RS232_DTR

RS232_TXD

RS232_RXD

SERIAL_CLOCK

RADIO_OFF_SC_N

SQUELCH_INDICATOR

D2

4148

Q1

11

Q2

12

Q3

13

Q4

14

TOE

10

StD

15

ESt

16

INH

5

VDD

18

VREF

4

VSS

9

IN+

1

IN-

2

GS

3

PD

6

St/GT

17

OSC1

7

OSC2

8

U6

CM88L70

R47
DNP

D7
DNP

D6
DNP

3.3DTMF

R13
100k
R14
100k

C54
.01uF

C53

.01uF

C26

0.1uF

C40

47uF,20V

C22

0.1uF

ESt

Y1

3.579545 MHZ

C21

0.1uF

3.3V

C28

0.1uF

C29

0.1uF

FB13

FB

R45
DNP

PTT_SWITCH

KEYPAD_SCAN_IN_1
KEYPAD_SCAN_IN_2

R43
560

FB11
FB

R25 0ohm

R24 DNP

3V3_LOGIC

FB9
FB

VOLUME_SWITCH_1

VOLUME_SWITCH_2

VOLUME_SWITCH_3

VOLUME_SWITCH_4

ON/OFF

FB8
FB

AUDIO

INTERNAL_PTT

FB7
FB

INTERNAL_PTT

1Y

1

1Z

2

2Y

4

4E

12

2Z

3

3Y

8

3Z

9

4Y

11

4Z

10

2E

5

1E

13

3E

6

VEE

7

VCC

14

U3

74HC4016

Y5

6

Y0

11

Y2

10

Y1

9

GND

12

Y13

13

A0

2

/LE

1

Y6

5

A1

3

Y15

15

Y12

14

Y7

4

Y4

7

Y14

16

Y3

8

Y8

18

Y9

17

Y11

19

Y10

20

A2

21

A3

22

/E

23

Vcc

24

U2
74HC4514

1Y

1

1Z

2

2Y

4

4E

12

2Z

3

3Y

8

3Z

9

4Y

11

4Z

10

2E

5

1E

13

3E

6

VEE

7

VCC

14

U5

74HC4016

K1
K2
K3
K4

K5
K6
K7

K8
K9

K*

K0

K#

KEYPAD_SCAN_IN_5

KEYPAD_SCAN_IN_6

KEYPAD_SCAN_IN_3

KEYPAD_SCAN_IN_4

KEYPAD_SCAN_OUT_1

KEYPAD_SCAN_OUT_2

KEYPAD_SCAN_OUT_3

3.3DTMF

3.3DTMF

3.3DTMF

3.3DTMF

C23

0.1uF

C25

0.1uF

3.3DTMF

47K

Q2
DTA144EK

47K

Q10
DTA144EK

47K

Q3
DTA144EK

Q7
2N7002

KEYPAD_SCAN_IN_2

R35
100

R36
100

R37
100

R38
100

R46
270k

C27

0.1uF

R50
DNP

ESt

47K

Q4

DTA144EK

R29
0ohm

R15
100k

KEYPAD_SCAN_IN_1

47K

Q1
DTA144EK

3.3V

R28
0ohm

R26
0ohm

R27
0ohm

C24

0.1uF

C30

0.1uF

1Y

1

1Z

2

2Y

4

4E

12

2Z

3

3Y

8

3Z

9

4Y

11

4Z

10

2E

5

1E

13

3E

6

VEE

7

VCC

14

U4
74HC4016

FB10
FB

3.3DTMF

3.3DTMF

C39
DNP

ON/OFF

R22
1M

E4

PAD

E8
PAD

E9
PAD

E10
PAD

R2 1k

R1 1k

R21 10k

C42
DNP

C43
DNP

C44

DNP

C33

1uF/16V

R49
220K

R48
220K

10K

Q11
DTA114EKA

10K

Q12
DTA114EKA

10K

Q13
DTA114EKA

10K

Q14
DTA114EKA

C41

DNP

R20
10k

C32

1uF/16V

R51

47.5k

Q5

2N7002

Q6
2N7002

Q8
2N7002

3.3V 3.3V

C31

1uF/16V

(ESCAPE)

(ENTER)

R16
10k

R17
10k

R19
10k

R18
10k

R12
100k

R3

1k

FB6

FB5

FB4

FB3

FB2

FB1

C1
DNPC2DNPC3DNPC4DNPC5DNPC6DNPC7DNPC8DNPC9DNP

C10
DNP

C11
DNP

C12
DNP

C13
DNP

E1
PADE2PAD

E7

PAD
E6
PAD

E5
PAD

D4
12V

C14

100p

C15
100p

C16
100p

C17
100p

C18

100p

C19
100p

E3
PAD

+3.3V_LCD

PCB: 738535

BOM: 125-50210

1
2
3
4
5
6
7
8

J5

610669

BIAS(+)

PTT_SWITCH

EXTERNAL_MIC/WE

INTERNAL_MIC

EXTERNAL_SPEAKER_P/KLD

EXTERNAL_PTT/KID

L8
FB

C52

100p

L7
FB

C45

100p

L6
FB

C51

100p

L5
FB

C50

100p

L4
FB

C49

100p

L3
FB

C48

100p

L2
FB

C47

100p

L1
FB

C46

100p

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20

J4

621112

LCD_CLOCK

LCD_TX

LCD_RESET_N
LCD_DATA_MODE

AUXILLARY_SWITCH_1
AUXILLARY_SWITCH_2
AUXILLARY_SWITCH_3

KEYPAD_SCAN_OUT_1
KEYPAD_SCAN_OUT_2
KEYPAD_SCAN_OUT_3
KEYPAD_SCAN_IN_1
KEYPAD_SCAN_IN_2

LCD_CS_N

+3.3V_LCD

R40

0ohm

7.8Vsw

LED_TX

LED_GREEN_N

VOLUME_SWITCH_3

VOLUME_SWITCH_4

12

84

C

SW3

510038

VOLUME_SWITCH_1

VOLUME_SWITCH_2

R33
100

R30
DNP

R31
DNP

R32
DNP

C38
DNP

INT_5W_SPEAKER_P

INT_5W_SPEAKER_N

RED

GRN

D3

035500004

VOLUME

12

84

C

SW4

510038

AUDIO_EXT_DISABLE

CHANNEL_SWITCH_1

CHANNEL_SWITCH_2

CHANNEL_SWITCH_4

CHANNEL_SWITCH_3

R39

100

R34
330

CHANNEL

Q9
2N7002

FB12
FB

IN

1

OUT3

3

OUT2

2

ADJ

4

NC

8

OUT6

6

OUT7

7

NC

5

U1 LM317

R53
270

R54
150

R52
249

TOGGLE_SWITCH_1

TOGGLE_SWITCH_2

SW1

TOGGLE

R4
1K

SW2

TOGGLE

AUDIO_EXT_DISABLE

AUDIO_INTERNAL_DISABLE

A

B

C

E

B

I

R5
1K

EXTERNAL_MIC_BIAS/KEY

L10
DNP

L11
DNP

PC_232TXD

PC_232RXD

R60

0OHM

LED_RED_N_SYS

R6
DNP

R7

0ohm

LCD_BACKLIGHT_N

KEYPAD_BACKLIGHT_N

ON/OFF

R9
10K

D5

R56
330

R57
330

RED

ON/OFF

PA_PTT

LED_TX

INT_5W_SPEAKER_N

INT_5W_SPEAKER_P

AUDIO_INTERNAL_DISABLE

AUDIO_EXT_DISABLE

INTERNAL_SPEAKER_P

INTERNAL_SPEAKER_N

EXTERNAL_SPEAKER_P/KLD

EXTERNAL_MIC_BIAS/KEY

WRU_MONITOR

RS232_TXD

PC_232TXD

RS232_DTR

EXTERNAL_MIC/WE
EXTERNAL_PTT/KID

PC_232RXD

RS232_CTS

SERIAL_CLOCK

RS232_RTS

RS232_RXD1

2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20

J2

613507

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20

J3

613507

EXTERNAL_SPEAKER_N

VBAT

7.8V

PTT_SWITCH

SQUELCH_INDICATOR

3.3V

7.8Vsw

7.8Vsw

7.8V

Q16
2N7002

PA_PTT

Q15
2N7002

R8
1M

C20
1uF/16V

7.8Vsw

Q17

2N7002

R55
1M

R23
1M

IGN_SW

7.8Vsw

7.8V

3.3V

IGN_SW

EMERGENCY_SWITCH

VBAT

7.8V

3.3V

3.3V

7.8V

Q21
IRLML6302

Q20
2N7002

ON/OFF

R62

10K

R58

0OHM

R59

DNP

47K

Q19

DTA144EK

Q18
2N7002

7.8Vsw

R10
100K

R11
100K

R61
10k

TP21

BIAS

BIAS

SPEAKER

1
2

J6

610217

R44
100k

7.8V

FD1FD2FD3

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

EXTPWR

EXTPWR

4.5VSW

BATTSW

3V3LOGIC

7.5VT

3V3LOGIC

7.5VT

3V3LOGIC

3V3LOGIC

BATTSW 3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

EXTMICB/KEY 5

EXTSPKR+/KLD 4,5
EXTSPKR- 4

232CLK_SC 5
232RXD_SC 5

PCRXD_SC 5

EXTPWR_SC 6

EXTMIC/WE 5
WRUMON 2
EXTPTT/KID 5

232TXD_SC 5
232DTR_SC 5

232RTS_SC 5

PCTXD_SC 5

PROGDATA 2,9,11
SYNTHENA 2,11
SRENA 2,11

12DACENA 3,9

8DACENA 2,9

DACADCCLK 3,5

MULTCLOCK 5

PATMON 2

RSSIMON 2,3

IFOUT 3,10

SYNTHOOL 2
/BATTOFF 5
CTX 5

DTXD 2

TDO 5

/WR 2,3,5

/RESET_JTAG 2,3,7
/WP 2
/STBY 2,3,5
DRXD 2

TCK 3,5
TDI 3

TMSDSP 3,5
/TRST 3
/DE 3

TMSFPGA 5

/RADON 6,7

SPKR+ 4
SPKR- 4

LEDGREENN 5
BL_KNOB_N 7

AUX2 7
AUX1 7

PTTSW 7
AUX3 7

VOL1 7

VOL3 7
VOL4 7

EMERGSW 7

TOG1 7

SECSW 7

TOG2 7
CHN1 7
CHN2 7
CHN3 7
CHN4 7

LEDREDN 5

BATTSENSE8

7.5VA8

7.5VT6,8

EEPWP9

PATEMP12

RSSI10

SYNTHLOCK11

IFOUT3,10

BATTCTRL8

TXCTRL8
20VCLK11

PROGCLK2,9,11
PROGDATA2,9,11
SYNTHENA2,11

SRENA2,11

8DACENA2,9

4.5VSW6,8

12DACENA3,9

12DACCLK9
12DACDATA3,9

232CTS_SC 5

/RADOFF_SC 6

SQL_SC 5

VOL2 7

INTMIC 4

GND_SIGNAL2,3,4,5,6,7,8,9,10,11,12

PROGCLK 2,9,11

BATTBUS 2

KOUT3 7

KOUT2 7

KOUT1 7

KIN1 7

KIN6 7

KIN3 7
KIN4 7

BL_KP_N 7

KIN5 7

KIN2 7

MTXD 5,7
/LCD_CS 5
/XRST 2,3,7
LCDA0 5

MCLK 5,7

BL_LCD_N 7

12DACDATA 3,9

RADONSW6

APPROVED

REVISIONS

ZONE REV DESCRIPTION DATE

PREPRODUCTION RELEASE

--

01

FILENAME

SOFTWARE VERSION

REV STATUS

OF SHEETS

REVISION

SHEETS

123456

Orcad Capture 7.00

07160101.DSN

-

NOTES: UNLESS OTHERWISE SPECIFIED.

1. INTERPRET DRAWING PER MIL-STD-100.

2. ALL RESISTANCE VALUES ARE IN OHMS,

3. CAPACITANCE VALUES ARE IN MICROFARADS,

4. LAST REF DES USED:

5. REF DES NOT USED:

SCALE

REV

SHEET

OF

SIZE CAGE CODE DWG NO

NONE

DATE

23386

TITLE

CONTRACT NO.

UNLESS OTHERWISE SPECIFIED

DIMENSIONS ARE IN INCHES
TOLERANCES ARE:

FRACTIONS DECIMALS ANGLES

DO NOT SCALE DRAWING

TREATMENT

FINISH

SIMILAR TO

PART

DASH

NO.

NEXT ASSY USED ON

APPLICATION

CHECKED

MFG/TEST ENG

TECH DIR

QA

APPROVALS

DSGNR

ADDITIONAL APPROVALS DATE

MECH ENG.

ELEC ENG.

DRAWN

THALES COMMUNICATIONS, INC.

Thursday, November 15, 2001

1 12

ROCKVILLE, MARYLAND

02

4200716

CCA CONTROL/TRANSCEIVER

SCHEMATIC DIAGRAM,

07/20/00E. HOOKER

.XX +/-

.XXX +/-

+/- +/-

DATRON4101421

D

THALES COMMUNICATIONS, INC.
This information represents intellectual property which
shall not be disclosed or released, except to comply with
contractural requirements. This information is provided
on a limited basis and does not include any rights to
manufacture, or have manufactured, any equipment
depicted therein.

JTAG/DEBUG
INTERFACE

CONTROL SIDEXCVR SIDE

B1,C550,D69,FL6,J5,L80,P2,Q71,R580,RT1,
T2,TP24,U77,Y1

C20,C24,C32,C33,C35-C37,C39-C42,C44-C52,
C54,C55,C58,C60,C62-C73,C76,C79,C80,C85,
C89-C91,C93,C99,C119,C122,C147,C153,C189,C194,C197,
C198,C204,C205,C207,C208,C210-C213,C217-C221,
C232,C234,C238,C239,C243,C250-C255,C258-C266,
C272-C274,C277,C278,C280-C283,C291,C296-C300,
C313-C317,C320-C327,C329,C330,C333,C391,C394-C398,
C402-C404,C530,C533,C548,D5,D6,D22,D29-D34,D51,
J1,J4,L23,L26,L27,L29,L32-L34,L36,L54,L57-L59,L67,P1,
Q3-Q6,Q8,Q9,Q20,Q28-Q30,Q37-Q45,Q56,R13-R30,R32,

U5-U10,U18,U22,U23,U25,U26,U30,U34,U38-U41,

R90,R93,R108,R158,R161,R163-R168,R170,R174,

R34-R43,R45,R46,R50,R53,R54,R56,R58-R63,R88,

R399,R402-R405,R407,R425,R438,R441-R443,R508,

R176,R184,R188-R190,R192,R194,R195,R197-R202,

R267-R271,R274,R275,R277,R278,R285,R286,R289,

R205,R207,R209-R211,R216,R221,R223,R226,R228,

U61,U66,U67,U72

R509,R519,R520,R532,TP4,TP15,TP16,TP22,TP23,U2,

R301-R305,R307-R314,R317,R318,R379,R383,R397,

R231-R235,R239,R242-R249,R260,R261,R265,

02 BOARD SPIN 2 UPDATED 10/10/01 B.MAAT

R368
10K

1%

C372

100 pF

5%

R354

100 1%

R396

2.21K

1%

C405

100 pF

5%

R356

100 1%

R384

10 1%

C408

0.01 uF

10%

J5
20 POS

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

R358
100 1%

R367
10K

1%

C401

100 pF

5%

R360
100 1%

R388

10 1%

R361

100 1%

R401
100K

1%

R362

100 1%

R398

10 1%

R363

100 1%

R366
10K

1%

R359

100 1%

R365
10K

1%

C407

0.01 uF

10%

R351

10K 1%

R364
10K

1%

C399

0.01 uF

10%

R350

10K 1%

R390

10 1%

C374
47 pF

5%

R352

10K 1%

R386

10 1%

C356
47 pF

5%

C406

100 pF

5%

R369
10K

1%

C351
100 pF

5%

R375

2.21K 1%

R406

47.5 1%

C352
100 pF

5%

R380
1K1%

R395

2.21K

1%

R357

1K 1%

C353
100 pF

5%

C350
100 pF

5%

R327

1K 1%

R381

100

1%

R329

1K 1%

R331

1K 1%

R333

1K 1%

R387

10K 1%

FL5

BEAD

R335

1K 1%

D36
BAR43S

1 2

3

R337

1K 1%

R393

100 1%

R339

1K 1%

C393

0.01 uF

10%

R385

100

1%

FL6
BEAD

R341

1K 1%

C400

0.01 uF

10%

R353

1K 1%

R343

1K 1%

C409

0.01 uF

10%

R355

1K 1%

R344

1K 1%

C392

0.01 uF

10%

R349
100

1%

D37
BAR43S

1 2

3

C346
100 pF

5%

R324

1K 1%

P2
80 POS

61619-80

1

1

2

2

3

3

4

4

5

5

6

6

7

7

8

8

9

9

10

10

62

62

63

63

64

64

65

65

66

66

67

67

68

68

69

69

70

70

71

71

72

72

73

73

74

74

75

75

76

76

77

77

78

78

79

79

80

80

11

11

12

12

13

13

14

14

15

15

16

16

17

17

18

18

19

19

20

20

21

21

22

22

23

23

24

24

25

25

26

26

27

27

28

28

29

29

30

30

31

31

32

32

33

33

34

34

35

35

36

36

37

37

38

38

39

39

40

40

41

41

42

42

43

43

44

44

45

45

46

46

47

47

48

48

49

49

50

50

51

51

52

52

53

53

54

54

55

55

56

56

57

57

58

58

59

59

60

60

61

61

R389

100 1%

C347
100 pF

5%

R325

1K 1%

R391

100 1%

C345
100 pF

5%

R345

1K 1%

R347

1K 1%

C390
100 pF

5%

D38
CMDSH2-3

2 1

R346
1K 1%

C342

0.01 uF

10%

R348

1K 1%

C343

0.01 uF

10%

R326

1K 1%

D39

BAR43S

1 2

3

R374
100K

1%

C381

0.01 uF

10%

R328

1K 1%

Q49
BSS123

1

3 2

R376
100 1%

C364

0.01 uF

10%

R330

1K 1%

C348

0.01 uF

10%

C363

0.01 uF

10%

C349

0.01 uF

10%

R332

1K 1%

C380

0.01 uF

10%

R334

1K 1%

C344

0.01 uF

10%

C369

47 pF

5%

R336

1K 1%

C376

100 pF

5%

C383

0.01 uF

10%

R338

1K 1%

C358

100 pF

5%

C366

0.01 uF

10%

R340

1K 1%

C377

100 pF

5%

C382

0.01 uF

10%

R342

1K 1%

C359

100 pF

5%

C365

0.01 uF

10%

R394

10 1%

C378

100 pF

5%

C385

0.01 uF

10%

R378

10 1%

C360

100 pF

5%

C368

0.01 uF

10%

R377
1K1%

C379

100 pF

5%

C384

0.01 uF

10%

R400

56.2

1%

C361

100 pF

5%

C367

0.01 uF

10%

R382

1K1%

C389

0.01 uF

10%

C388

0.01 uF

10%

R372

10 1%

C373

0.01 uF

10%

C371

0.01 uF

10%

R371

10K 1%

C355

100 pF

5%

C387

0.01 uF

10%

R373

100 1%

C354

100 pF

5%

C370

0.01 uF

10%

R392

10 1%

C375

100 pF

5%

C386
47 pF

5%

R370
1K

1%

C357

0.01 uF

10%

C362

0.01 uF

10%

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

XTALVCC

XTALCLK

DVRINCLK

CLKDVRVCC

RSTVCC

FLASHVCC

FLASHVPP

DVROUTCLK

TCXOCTRL

TCXOCTRL

RAMVCC

DB10

DB7

DB0

DB3

DB10

AB1

DB13

AB8

AB7

DB3

AB20

DB4

AB0

/RES

DB15

AB15

AB6

DB2

AB18

DB1

DB0

/RESO

BATTMON

AB14

AB18

DB4

AB2

DB1

AB19

DB8

AB16
AB17

DB15

AB5

DB7

AB2

AB1

AB10

AB3

AB9

AB1

AB9

DB15

AB14
AB15

DB14

AB10

DB8

AB11

AB16

AB12

AB0

DB6

AB17

DB12

AB13

AB2

AB12

AB13

AB5

AB19

AB11

DB11

AB12

AB3

DB8

DB14

DB9

AB14

AB11

AB8

AB20

DB13

AB4

/RES DB2

AB15

AB7

AB6

DB12

AB9

AB6

DB5

DB10

AB8

/RESO

AB16

DB13

AB10

AB4

DB11

DB9

DB14

AB7

AB3

DB5

AB5

DB12

DB11

DB9

AB4

DB6

AB13

MPUCLK

MPUCLK

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3CONT

H8VCC

H8VCC

3V3LOGIC

H8VCC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

/STBY1,3,5

SYNTHOOL1

DRXD1

/WP1

DTXD1

/DSPO_CS3

SYNTHENA11

PROGDATA9,11

/BREQ 3
/BACK 3

DSPWD3

/RES 5

DB[0..15] 3

/RD 3
/WR 1,3,5

/RAM_CS 3

/FLASH_CS 3

LBI 6

RSSIMON 1,3

8DACENA9

WRUMON 1

KEYLOAD5

AB[0..20] 3,5

DATIN_H8 5

/MINT 7

CONFDONE5

ALM 4

/LBOUT3,6

SOCLK 5

TXDO 5

232RTS_H8 5

/EXTPTT 5,6

/HINT 3

/XRST 1,3,7

/FPGA_CS 5

DATOUT_H8 5

PATMON 1

RXDO 5

GND_SIGNAL1,3,4,5,6,7,8,9,10,11,12

SRENA11

VPPCTRL3

BATTBUS1

/DINT3

PROGCLK9,11

/PWROFF6

FPGACLK 5

DSPCLK 3

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

2 12

024200716

E. HOOKER

D

ALARM INPUT?

Control MPU

U64
IS62LV12816LL-70BI

365766

A0

A3

A1

A4

A2

A5

A3

B3

A4

B4

A5

C3

A6

C4

A7

D4

A8

H2

A9

H3

A10

H4

A11

H5

A12

G3

A13

G4

A14

F3

A15

F4

A16

E4

IO0

B6

IO1

C5

IO2

C6

IO3

D5

IO4

E5

IO5

F5

IO6

F6

IO7

G6

GND

D1

UB#

B2

CE#

B5

OE#

A2

WE#

G5

VCC

D6

LB#

A1

NC

A6

IO8

B1

IO9

C1

IO10

C2

IO11

D2

IO12

E2

IO13

F2

IO14

F1

IO15

G1

NC

D3

VCC

E1

NC

E3

GND

E6

NC

G2

NC

H1

NC

H6

R514
150K

1%

R505
10

1%

R506
10K

1%

C482

0.1 uF

10%

C485

0.01 uF

10%

PORT A

PORT B

PORT 9

PORT 8

PORT 7

U63
HD6433044SS00XI

365582

VCC

68

5174163152141130124913

90

MD2

75

MD1

74

MD0

73

EXTAL

66

XTAL

67

^

61

STBY

62

RES

63

VPP* /RESO

10

NMI

64

0

93

1

94

2

95

3

96

4

97

5

98

6

99

7

100

0

2

1

3

2

4

3

5

4

6

5

7

6

8

7

9

289188087785684583482381280179078AVSS86VSS11VSS22VSS44VSS57VSS65VSS

92

0

18

1

19

2

20

3

21

4

23

5

24

6

25

7

26

0

53

1

54

2

55

3

56

0

58

1

59

2

60

3

69

4

70

5

71

6

72

VCC35VCC

1

AVCC

76

VREF

77734633532431330128229027752651550449348247146045743642541440339238137036

U68

12.288 MHz

O.P

3

VCC

4

VCONT

1

GND

2

Q66
2N7002

1

32

U60
MAX825TEUK

RESET3MR

4

RESET

1

GND

2

VCC

5

R537

100

1%

C507
100 pF

5%

R511
150K

1%

U62

RC28F160C3BA90

365764

A1

A1

A2

B1

A3

C1

A4

D1

A5

D2

A6

A2

A7

C2

A8

D7

A9

D8

A10

A7

A11

B7

A12

C7

A13

C8

A14

B8

A15

A8

A16

G8

A17

B2

A18

A3

DQ0

F2

DQ1

E2

DQ2

G3

DQ3

E4

DQ4

G4

DQ5

F5

DQ6

E6

DQ7

H6

DQ8

E1

DQ9

E3

DQ10

F3

DQ11

F4

DQ12

E5

DQ13

G5

DQ14

F6

DQ15

G6

GNDA6GND

G7

OE#

H2

CE#

F1

WP#

C3

RP#

B4

WE#

C4

VPP

A4

VCCQ

H3

A19

B3

A0

G1

VCCQ

H7

VSSQH5VSSQ

G2

VCCH4VCC

A5

R536

4.75K

1%

R517
150K

1%

R518
NU

C487

0.01 uF

10%

C484

0.1 uF

10%

C490

100 pF

5%

C497

0.1 uF

10%

Q67
2N7002

1

32

C486

1000 pF

5%

L77

BEAD

C483

0.01 uF

10%

+

C496

2.2 uF

10%
10V

R513
221K

1%

R516
182K

1%

R507
10

1%

R567

82.5

1%

R515

82.5

1%

R568

82.5

1%

R512
10K

1%

C488
12 pF

5%

R563
10K

1%

R579
10K

1%

R564
10K

1%

R534
100

1%

+

C489

2.2 uF

10%
10V

R580
10K

1%

R530

100

1%

C502

0.01 uF

10%

R321
10K

1%

R535

100

1%

R323
10K

1%

C504
100 pF

5%

L76

1.2 uH

5%

R533

4.75K

1%

C503

0.01 uF

10%

R572
10K

1%

C506

0.01 uF

10%

R529

100

1%

R528

100 1%

R531

100K

1%

C505

0.01 uF

10%

C538

0.1 uF

10%

R522
100K

1%

R523
10K

1%

R525
100K

1%

C491

0.1 uF

10%

U71
NC7SZ14

365647
SOT23/5P

NC

1

A

2

GND

3

Y

4

VCC

5

C500

0.1 uF

10%

C492

0.1 uF

10%

R521

100 1%

C493

0.1 uF

10%

L78
BEAD

U69
NC7SZ126

SC70-5

365773

1
2

3

4

5

+

C499

2.2 uF

10%
10V

C498

0.01 uF

10%

C494

0.1 uF

10%

Q65
BSS84TA

1

32

C537

0.1 uF

10%

R524
100K

1%

R510
10

1%

C501

0.01 uF

10%

L75

BEAD

U70
NC7SZ126

SC70-5

365773

1
2

3

4

5

R526

100

1%

R527
100K

1%

C495

NU

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

455IFCOUT

ADCDIN

ADCDOUT

AB10

AB3

DB13

AB18

DB15

AB2

AB0

DB9

DB6

AB17

AB16

DB13

AB11

AB9

AB6

AB2

DB12

DB0

DB15

DB14

AB1

AB19

DB8

DB14

DB11

DB5

AB8

DB9

AB7

AB5

AB4

DB10

DB8

AB0

DB12

DB10

DB3

AB12

AB1

DB11

DB7

DB4

DB2

AB15

AB13

DB1

AB14

ADCVCC

ADCREFVCC

ADCDOUT

ADCDIN

DSPVCC

3V3LOGIC

3V3ANALOG

3V3ANALOG

3V3LOGIC

3V3LOGIC

DACADCCLK1,5

IFOUT10

/RD2

/WR1,2,5
/BREQ2
/BACK2

/STBY1,2,5

DSPCLK2

/LBOUT2,6

DB[0..15]2

AB[0..20]2,5

/FLASH_CS2

/RAM_CS2

RSSIMON1,2

12DACDATA 9

/DSPO_CS 2

CODECFSK 4

232RXD_DSP 5

/RESET_JTAG1,2,7

/IRQD 5

TDI 1

/HINT 2

232TXD_DSP 5

CODECDOUT 4

CODECCLK 4

DACADCCLK 1,5

232CTS/DIGSQ_DSP 5

/DINT 2

VPPCTRL 2

TCK 1,5

/DE 1

CODECDIN 4

DSPWD 2

/CODECEARMUTE 4

232RTS/EORS_DSP 5

232DTR/SYNC_DSP 5

/TRST 1

12DACENA 9

/WR 1,2,5

TDODSP 5

/CODECMICMUTE 4

/XRST1,2,7

/RD 2

232CLK_DSP 5

TMSDSP 1,5

GND_SIGNAL1,2,4,5,6,7,8,9,10,11,12

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

3 12

024200716

E. HOOKER

D

DECOUPLING CAPS MUST BE CLOSE TO DSP VCC PINS

1.536 MHz

2.048 MHz

Control DSP

TEST PAD

R541
100

1%

C523
.033 uF

10

R542

47.5

1%

C543

0.047 uF

10%

R544

100

1%

C534

0.01 uF

10%

R539
10K

1%

R545

100

1%

R549
100K

1%

R555
100K

1%

R548

100

1%

C529

0.1 uF

10%

R551

100

1%

R553

100

1%

R556
100

1%

C521

0.01 uF

10%

C520

0.1 uF

10%

C519

0.01 uF

10%

C517

0.01 uF

10%

C518

0.1 uF

10%

U74
MAX1246

365695
QSOP16/025/210

CH0

2

CH1

3

CH2

4

CH3

5

COM

6

SHDN

7

VREF

8

REFADJ

9

DIN

14

SCLK

16

Vdd

1

AGND10DGND

11

DOUT

12

SSTRB

13

CS

15

C516

0.1 uF

10%

C515

0.01 uF

10%

C541
12 pF

5%

R547
10

1%

C514

0.1 uF

10%

+

C528

4.7 uF

10%
10V

C513

0.01 uF

10%

C512

0.1 uF

10%

C511

0.01 uF

10%

C510

0.1 uF

10%

C509

0.01 uF

10%

+

C522

2.2 uF

10%
10V

C508

0.1 uF

10%

E4
PAD2

1

L79

BEAD

R540
10K

1%

R546

100

1%

R552
10K

1%

R569
NU

R550
NU

C525
100 pF

5%

C532

NU

C526
100 pF

5%

C527
100 pF

5%

C531
100 pF

5%

C535
100 pF

5%

CLOCK

PLL

PORT A

TIMER

PORT E

PORT D

PORT C

PORT B

U65

XC56309GC100A

365770

GNDD4GNDD5GNDD6GNDD7GNDD8GNDD9GND

D10

GND

D11

EXTAL

M8

XTAL

P8

CLKOUT

M9

PCAP

P5

GNDE4GNDE5GNDE6GNDE7GNDE8GNDE9GND

E10

GND

E11

GND

F4

VCCQL

N9

VCCQH

M7

VCCP

M6

VCCH

M4

VCCA

L12

VCCA

K12

VCCS

K1

VCCA

H12

VCCQL

H2

VCCQH

H1

VCCQL

G13

VCCQH

F12

VCCS

E2

VCCD

D14

VCCD

C11

VCCD

C9

VCCQL

C7

VCCD

A7

PINIT/NMI

D1

A0

N14

A1

M13

A2

M14

A3

L13

A4

L14

A5

K13

A6

K14

A7

J13

A8

J12

A9

J14

A10

H13

A11

H14

A12

G14

A13

G12

A14

F13

A15

F14

A16

E13

A17

E12

D0

E14

D1

D12

D2

D13

D3

C13

D4

C14

D5

B13

D6

C12

D7

A13

D8

B12

D9

A12

D10

B11

D11

A11

D12

C10

D13

B10

D14

A10

D15

B9

D16

A9

D17

B8

D18

C8

D19

A8

D20

B7

D21

B6

D22

C6

D23

A6

AAO

N13

AA1

P12

AA2

P7

AA3

N7

RD

M12

WR

M11

TA

P10

BR

N11

BG

P13

BB

P11

CAS

N8

BCLK

N10

BCLK

M10

GND

F5

MODAIRQA

C4

MODBIRQB

A5

MODCIRQC

C5

MODDIRQD

B5

RESET

N5

H0

M5

H1

P4

H2

N4

H3

P3

H4

N3

H5

P2

H6

N1

H7

N2

HA0

M3

HA1

M1

HA2

M2

HCS/HCS

L1

HRW

J2

HDS/HDS

J3

HREQ/HREQ

K2

HACK/HACK

J1

SC00

F3

SC01

D2

SC02

C1

SCK0

H3

SRD0

E3

STD0

E1

SC10

F2

SC11

A2

SC12

B2

SCK1

G1

SRD1

B1

STD1

C2

RXD

F1

TXD

G3

SCLK

G2

TI00

L3

TI01

L2

TI02

K3

TCK

C3

TDI

B3

TDO

A4

TMS

A3

TRST

B4

DE

D3

NCA1NC

A14

GND

G4

NC

B14

GNDF6GNDF7GNDF8GNDF9GND

F10

GND

F11

GNDG5GNDG6GNDG7GNDG8GNDG9GND

G10

GND

G11

GNDH4GNDH5GNDH6GNDH7GNDH8GNDH9GND

H10

GND

H11

GNDJ4GNDJ5GNDJ6GNDJ7GNDJ8GNDJ9GND

J10

GND

J11

GND

K4

GND

K5

GND

K6

GND

K7

GND

K8

GND

K9

GND

K10

GND

K11

GNDL4GNDL5GNDL6GNDL7GNDL8GNDL9GND

L10

GND

L11

GNDP

N6

VCCC

N12NCP1

GNDP1

P6

VCCC

P9NCP14

+

-

U73
NU

SOT23/3P

1

2

3

R543
10K

1%

R570

NU

R538

33.2K

1%

R554
10K

1%

C524
100 pF

5%

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

ACODVCC CODECVCC

5VMICBIAS

3V3ANALOG

3V3ANALOG

3V3LOGIC

5VAUDIO

5VAUDIO

5VAUDIO

5VAUDIO

5VLOGIC

SPKRON5

ALM2

/CODECMICMUTE3

EXTMIC5

INTMIC1

EXTSPKRON5

CODECCLK 3
CODECDOUT 3

CODECDIN 3

SPKR+ 1

SPKR- 1

EXTSPKR- 1

EXTSPKR+/KLD 1,5

CODECFSK 3

GND_SIGNAL1,2,3,5,6,7,8,9,10,11,12

/CODECEARMUTE3

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

4 12

024200716

E. HOOKER

D

Control Audio

U59

LM4872

+IN

7

-IN

1

SDOWN

5

BYPASS

3

GND

2

V01

8

V02

4

VDD

6

R502
150K

1%

Q64
2N7002

1

32

R488
100K

1%

R503
100K

1%

R491
221K

1%

C475

0.033 uF

10%

R501
15K

1%

C469

0.047 uF

10%

R498
100K

1%

R500
100K

1%

R496

15K

1%

+

C471

2.2 uF

10V

C480

0.033 uF

10%

C470

0.1 uF

10%

C478

470 pF

10%

C467

0.1 uF

10%

C479

0.1 uF

10%

L74

BEAD

R485

10

1%

R560
475

1%

R562
475

1%

R561

33.2K

1%

R559

33.2K

1%

R492

150K

1%

R495
100K

1%

D68
BAR43C

1

3

2

R489

562

1%

D67
BAR43C

1

3

2

R493
150K

1%

R487

4.75K

1%

C476

0.1 uF

10%

R499
10K

1%

R494
150K

1%

D69
BAR43S

1 2

3

R486

5.62K

1%

Q63
2N7002

1

32

R497
150K

1%

C468

1.0 uF

20%

C463

3900 pF

5%

R484
100

1%

C465

0.1 uF

10%

+

C466
15 uF

10%
10V

C473

470 pF

10%

C474

0.1 uF

10%

+

C477
1 uF

10%

C549
470 pF

10%

+

-

U57
LMC7101A

365438

3

4

1

5 2

+

C481
1 uF

10%

R483
10

1%

R490

15K

1%

C464

0.1 uF

10%

U56
TLV320

MICGS

41

MICIN

40

MICBIAS

42

MICMUTE

11

EARB

45

EARGS

46

EARA

44

EARMUTE

17

PDN

43

VMID

36

AGND34DGND

27

DCLKR

14

CLK

19

DOUT

21

FSX

20

FSR

16

DIN

15

TSX/DCLKX

22

LINSEL

26

AVCC

4

DVCC

9

R504
150K

1%

C472

1.0 uF

20%

U58

LM4872

+IN

7

-IN

1

SDOWN

5

BYPASS

3

GND

2

V01

8

V02

4

VDD

6

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

FPGAVCC

KVLSEL

AVR_CLK

232DTRIN

232TXDIN

232RTSIN

KEYOUT

KEYIN

KEYID

DAC_ADC_CLK

232CTSOUT

232RXDOUT

232CLKOUT

232DTRIN

232RTSIN

232CLKOUT

232CTSOUT

232VCC

KEYID

KVLSEL

KEYIN

KEYOUT

AB16
AB17
AB18
AB19

/WE

/WE AVR_CLK

DAC_ADC_CLK

LEDGREEN

LEDGREEN

PSU_CLK

PSU_CLK

/232SHDN

/232SHDN

LEDRED

LEDRED

232RXDOUT

232TXDIN

AB20

3V3LOGIC

3V3LOGIC

3V3LOGIC

5VLOGIC

5VLOGIC

5VLOGIC 5VLOGIC

5VLOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

3V3LOGIC

5VLOGIC

5VLOGIC

3V3LOGIC

5VLOGIC

RXDO 2

232RTS/EORS_DSP 3

/IRQD 3

SPKRON 4

232RTS_H8 2

232DTR/SYNC_DSP 3

DACADCCLK 1,3

232DTR_SC 1
232TXD_SC 1
232RTS_SC 1
PCTXD_SC 1

232CTS_SC 1
232CLK_SC 1
232RXD_SC 1
PCRXD_SC 1DATOUT_H82

DATIN_H82

232CLK_DSP 3

LEDREDN 1
LEDGREENN 1

EXTMIC/WE1
EXTPTT/KID1

EXTSPKR+/KLD1,4

EXTMIC 4

/EXTPTT 2,6

KEYLOAD 2

EXTMICB/KEY1

MULTCLOCK 1

MRXD 7

AVRCLK 7

232CTS/DIGSQ_DSP 3

GND_SIGNAL1,2,3,4,6,7,8,9,10,11,12

/RES2

SOCLK2

TXDO2

CONFDONE2

FPGACLK2

232RXD_DSP 3

EXTSPKRON4

AB[0..20]2,3

/WR1,2,3

/FPGA_CS2

/LCD_CS1

MCLK1,7
MTXD1,7

SQL_SC1

/KPD_CS7

PWRHOLD6

CTX1

/BATTOFF1

LCDA01

TCK1,3

TDODSP3

TMSFPGA1

TMSDSP1,3

TDO1

PSUCLK6

/STBY1,2,3

232TXD_DSP3

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

5 12

024200716

E. HOOKER

D

Control FPGA

R449
1K

1%

C462

0.1 uF

10%

R447
1K

1%

U54
MAX213EEAI

V+

13

EN

24

GND

10

T4I

21

T2I

6

R4O

22

R1O

8

R2O

5

T1I

7

R3O

26

C1+

12

T3I

20

R5O

19

C2-

16

C2+

15

C1-

14

V-

17

T10

2

T20

3

T30

1

T40

28

R1I

9

R2I

4

R3I

27

R4I

23

R5I

18

SHDN

25

VCC

11

R466
NU

D52
CMPSH-3A

1

3

2

R451
100K

1%

R469
NU

C454
100 pF

5%

Q60
2N7002

1

32

R471

10

1%

D53

CMDSH2-3

2 1

R468
10

1%

R464
10K

1%

L73

BEAD

C457

0.1 uF

10%

Q62

2N7002

1

32

R480

4.75K

1%

D54

CMDSH2-3

2 1

C461
100 pF

5%

R565
10K

1%

D55

CMDSH2-3

2 1

D60

CMDSH2-3

21

R475
10K

1%

D56

CMDSH2-3

2 1

R477
100K

1%

D57

CMDSH2-3

2 1

R476
10K

1%

R478
10K

1%

R481
10K

1%

R482
150K

1%

D65

CMDSH2-3

21

R463
10K

1%

R462
10K

1%

C456
100 pF

5%

R461
10K

1%

D66
BAR43S

1 2

3

R460
100K

1%

D62
BAR43S

1 2

3

D63
BAR43S

1 2

3

D64
BAR43S

1 2

3

D59

CMDSH2-3

21

C542
12 pF

5%

R448
10K

1%

R467
100K

1%

U55

MAX4053

NCC

12

NOC

13

NCB

2

NOB

1

NCA

5

NOA

3

INH

6

ADDC

11

ADDB

10

ADDA

9

COMC

14

COMB

15

COMA

4

V+

16

GND8V-

7

R446

10

1%

R472

1K

1%

+

C455
15 uF

10%
10V

C448

0.1 uF

10%

Q61
2N7002

1

32

R459

22.1K

1%

D61

CMDSH2-3

21

R452

47.5

1%

C449

0.1 uF

10%

+

C447

2.2 uF

10%
10V

C450

0.1 uF

10%

R470
10K

1%

C451

0.1 uF

10%

C460

0.1 uF

10%

R473
100K

1%

R465
10K

1%

C452

0.1 uF

10%

R455
150K

1%

R457
10

1%

R479
100K

1%

U53
EPF6016AFI100-3

365765

nCE

C2

INIT_DONE

E10

MSEL

H2

nSTATUS

G5

nCONFIG

K5

DCLK

D6

CONFIG_DONE

C9

nCEO

K9

nWS

C7

nRS

A7

nCS

A9

CS

C8

RDYnBUSY

D10

CLKUSR

C10

DATA

A6

TDI

D2

TCK

G3

TMS

G2

TDO

K10

IN

E1

IN

E2

IN

F9

IN

F10

DEV_CLRn

B5

DEV_OE

B6

GND

D4

VCC

D7

VCC

E4

VCC

E5

VCC

F6

VCC

F7

VCC

G4

GND

E6

GND

E7

GND

F4

GND

G7

GND

F5

I/O

A1

I/O

A2

I/O

A3

I/O

A4

I/O

A5

I/O

A8

I/O

A10

I/O

B1

I/O

B2

I/O

B3

I/O

B4

I/O

B7

I/O

B8

I/O

B9

I/O

B10

I/O

C1

I/O

C3

I/O

C4

I/O

C5

I/O

C6

I/O

D1

I/O

D3

I/O

D5

I/O

D8

I/O

D9

I/O

E3

I/O

E8

I/O

E9

I/O

F1

I/O

F2

I/O

F3

I/O

F8

I/O

G1

I/O

G6

I/O

G8

I/O

G9

I/O

G10

I/O

H1

I/O

H3

I/O

H4

I/O

H5

I/O

H6

I/O

H7

I/O

H8

I/O

H9

I/O

H10

I/O

J1

I/O

J2

I/O

J3

I/O

J4

I/O

J5

I/O

J6

I/O

J7

I/O

J8

I/O

J9

I/O

J10

I/O

K1

I/O

K2

I/O

K3

I/O

K4

I/O

K6

I/O

K7

I/O

K8

C453

0.1 uF

10%

R456
150K

1%

C458

0.1 uF

10%

R474
100

1%

D58

CMDSH2-3

21

Q59
2N7002

1

32

C459

0.1 uF

10%

R453

56.2

1%

R458

100

1%

R454

56.2

1%

R450
1K

1%

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

P64

P61

P62

P58

P59

P63

P56 P57

P60

3V3LOGIC

5VLOGIC

5VMICBIAS

BATTSW

3V3LOGIC

4.5VSW

7.5VT
3V3CONT

5VAUDIO

3V3ANALOG

BATTSW

7.5VT

4.5VSW

7.5VT

7.5VT

3V3CONT

EXTPWR_SC1

/LBOUT 2,3

/EXTPTT2,5

LBI 2

PSUCLK5

7.5VT1,8

GND_SIGNAL1,2,3,4,5,7,8,9,10,11,12

4.5VSW8

/PWROFF2

/RADON1,7

PWRHOLD5

RADONSW1

/RADOFF_SC1

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

6 12

024200716

E. HOOKER

D

Control Power

NC

D50
BZX84C8V2

33606

1 3

2

Si4953DY

U47B

345

6

R428
562K

1%

R435
182K

1%

R436
10K

1%

R578
150K

1%

C436

0.01 uF

10%

U52
LP2980A-5.0

VIN

1

GND

2

VOUT

5

NC4EN

3

C437
47 pF

5%

R424

2.00

1%

C435
6800 pF

10%

C433
680 pF

5%

U46
MIC5205

VIN

1

GND

2

VOUT

5

BYP4EN

3

R573
150K

1%

R437

5.11K

1%

+

C425

1.0 uF

20%
35V

C423

0.1 uF

10%

C424

0.01 uF

10%

C432
100 pF

5%

C422

0.1 uF

10%

D49
ZHCS1000

3 1

R445

475

1%

+

C421

4.7 uF

10%
10V

R434
100K

1%

C446

0.1 uF

10%

R431
274K

1%

+

C445

4.7 uF

10%
10V

U51
LT1118

GND

2

VOUT

1

TAB-GND

4

VIN

3

Q57
2N7002

1

32

R440

10

1%

Q58
2N7002

1

32

U49A

Si4953DY

127

8

U48

LTC1434IGN

365421

PWRVIN

20

SVIN

18

LBI

10

PLLIN

17

PLL LPF

16

COSC

15

ITH

13

VPROG

11

RUN/SS

7

PGND19SGND

5

BSW

4

SSW

2

VOSENSE

12

NC

1

NC

3

POR

14

NC

6

NC

8

LBO

9

R444
150K

1%

C444

0.1 uF

10%

U50
LP2980A-5.0

VIN

1

GND

2

VOUT

5

NC4EN

3

C442

0.1 uF

10%

Q68
2N7002

1

32

C428

0.1 uF

10%

+

C443

4.7 uF

10%
10V

C440

0.1 uF

10%

C434

0.1 uF

10%

+

C441
15 uF

10%
10V

+

C439

4.7 uF

10%
10V

R427
150K

1%

C429

0.1 uF

10%

R574
150K

1%

R426
562K

1%

+

C430
100 uF

20%
6V

R575
150K

1%

R577
150K

1%

C414

0.1 uF

10%

+

C431

4.7 uF

10%
10V

R576
150K

1%

R439
150K

1%

L70

10 uH

5%

C416

0.1 uF

10%

D48

CMSH2-40

2 1

Q71
2N7002

1

32

R429
10K

1%

+

C415

4.7 uF

10%
10V

U44
LP2980A-3.3

VIN

1

GND

2

VOUT

5

NC4EN

3

R421

100

1%

R432
10K

1%

C417

0.1 uF

10%

Q69
2N7002

1

32

C438

0.1 uF

10%

R433

8.25K

1%

C420

0.1 uF

10%

+

C418

4.7 uF

10%
10V

Q55
MMBT3906

1

23

+

C419
100 uF

20%
6V

U47A

Si4953DY

127

8

D47

ZHCS1000

31

R422

47.5

1%

Si4953DY

U49B

345

6

L71

33 uH

20%

Q70
2N7002

1

32

R423

10

1%

L72

1.2 uH

t

RT1
miniSMD050-2

R430
150K

1%

D46
CMDSH2-3

2 1

U45
LP2980A-3.6

VIN

1

GND

2

VOUT

5

NC4EN

3

C426

0.1 uF

10%

+

C427

4.7 uF

10%
10V

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

ATFVCC

/BK_DIM

ATMELVCC

/BK_ON

3V3LOGIC

3V3LED

3V3LOGIC

3V3LOGIC

VOL21
VOL31
VOL41

/RADON1,6

BL_LCD_N 1
BL_KP_N 1
BL_KNOB_N 1

/MINT 2

KIN51

KIN21

CHN41

AUX11

KOUT3 1

TOG11

CHN21

KIN31

AVRCLK5

/XRST1,2,3

KOUT2 1

TOG21

KIN41

MTXD1,5

MCLK1,5

/KPD_CS5

EMERGSW1

KIN61

CHN11

KIN11

SECSW1

AUX21

GND_SIGNAL1,2,3,4,5,6,8,9,10,11,12

MRXD 5

PTTSW1

KOUT1 1

CHN31

VOL11

AUX31

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

7 12

024200716

E. HOOKER

D

Added GND to ICP.

Control Keypad

R414
100

1%

C410

0.01 uF

10%

R410
1K

1%

D40
CMDSH2-3

21

L69
BEAD

R411
1K

1%

R419

10

1%

D42
CMDSH2-3

21

C411

0.01 uF

10%

D45
CMDSH2-3

21

Q54
2N7002

1

32

R417
100

1%

R413
100K

1% Q52

MMBT3904

1

2 3

C412

0.01 uF

10%

R416
100K

1%

D44
CMPSH-3A

132

Q53
MMBT3904

1

2 3

AT90S8515

U43

AT90S8515-4AC

PB040PB141PB242PB343PB4

44

PA037PA136PA235PA3

34

PA4

33

PA5

32

PA6

31

PA7

30

PC018PC119PC220PC321PC4

22

PC5

23

PC6

24

PC7

25

PD1

7

PD2

8

PD3

9

PD4

10

PD5

11

PD612PD7

13

PB5

1

PB6

2

PB7

3

NC

39

NC

28

NC

17

NC

6

RESET

4

PD0

5

XTAL115XTAL214GND

16

ALE

27

OC1B

26

ICP

29

VCC

38

Q50

BSS84TA

1

32

D41
CMDSH2-3

21

R420

47.5K

1%

R415
100K

1%

Q51
MMBT3904

1

2 3

R418
100

1%

C413

0.1 uF

10%

R408

47.5K

1%

D43
CMPSH-3A

132

R412

1.5K

1%

R409
1K

1%

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

P54 P55

GND_SIGNAL 1,2,3,4,5,6,7,9,10,11,12

7.5VA_XCVR 11

PATEMP1,12

RSSI1,10

SYNTHLOCK1,11

TOPRF 12

SYNTHENA 2,11

SRENA 2,11

4.5VSW_XCVR 11,12

12DACENA 3,9

12DACCLK 1,9

12DACDATA 3,9

PROGCLK 2,9,11

PROGDATA 2,9,11

SIDERF 12

7.5VT1,6

GND_SIGNAL1,2,3,4,5,6,7,9,10,11,12

BATTSENSE1

PATEMP1,12

RSSI1,10

SYNTHLOCK1,11

BATTCTRL1

TXCTRL1
20VCLK1,11

PROGCLK2,9,11

PROGDATA2,9,11

SYNTHENA2,11

SRENA2,11

4.5VSW6

12DACENA3,9
12DACCLK1,9

12DACDATA3,9

8DACENA2,9

7.5VT_XCVR 12

20VCLK 1,11

EEPWP 1,9

8DACENA 2,9

EEPWP1,9

7.5VA1

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

8 12

024200716

E. HOOKER

D

BATTCTRL TXCTRL

BATTERY+

BATTERY-

BATTSENSE

Transceiver Interface

E2
PAD1

1

U36-2

Si4925DY

32675

G

4

S3D

5

D

6

E3
PAD1

1

E1
PAD1

1

C311

0.1 uF

10%

R299
150K

1%

R297
150K

1%

R298
150K

1%

R300
150K

1%

+

C312
15 uF

20%

20V

J2
OSMT

60165

1

234

Q47
2N7002LT1

SS-32550

1

32

J3
OSMT

60165

1

234

Q48
2N7002LT1

SS-32550

1

32

C318

0.1 uF

10%

R306

0

C319

0.1 uF

10%

U36-1

Si4925DY

32675

G

2

S1D

7

D

8

C304
.22 uF

10

L66

1.2 uH

5%

C305
.22 uF

10

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

PROGCLK

PROGDATA

PROGCLK

PROGDATA

+5VDIG

+2.5VREF

+5VDIG

+5VDIG

+5VDIG

7.5VA_XCVR

+3.3VRX

+5VDIG

+5VDIG

+5VDIG

+2.5VREF

3V3LOGIC

20V

20V

+5VDIG11

GND_SIGNAL1,2,3,4,5,6,7,8,10,11,12

REFOSCMOD 11

IFAGC 10

7.5VA_XCVR8,11

+3.3VRX10,11

2ND_LO_TUNE 10

RXVTF 10

PWRSET 12

CTUNE 11

TXVCOMOD 11

12DACDATA3

12DACENA3

12DACCLK1

8DACENA2

PROGCLK2,11

PROGDATA2,11

EEPWP1

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

9 12

024200716

E. HOOKER

D

8 BIT DAC

EEPROM

2.5 VDC

12 BIT DAC

Transceiver DACs

R175
130K

1%

R180
100K

1%

C275

0.1 uF

10%

R177

43.2K

1%

R272
100K

1%

R182
100K

1%

U33

MAX534B

365590

OUTB

1

OUTA

2

OUTC

16

OUTD

15

VDD

13

AGND

14

DGND

12

REF

3

DOUT

8

DIN

11

UPO

4

PDE

5

CLR*

7

LDAC

6

CS*

9

SCLK

10

R291

100

1%

R172

90.9K

1%

R290
100

1%

R252
100K

1%

C545
.033 uF

C257

0.1 uF

10%

R254
100K

1%

U76

LM7301

365661

OP

1

V-

2

-IP

4

+IP

3

V+

5

R255
100K

1%

C269

0.1 uF

10%

C271

0.1 uF

10%

C544
.033 uF

U31

MAX525B

365588

OUTA

3

FBA

2

OUTB

4

FBB

5

OUTC

17

FBC

16

OUTD

18

FBD

19

AGND

1

DGND

11

DOUT

12

UPO

13

REFAB

6

REFCD

15

CS*

8

DIN

9

SCLK

10

VDD

20

CL*

7

PDL*

14

R258
100K

1%

C303

0.1 uF

10%

R259
100K

1%

C117

0.1 uF

10%

R86

100K

1%

C267

0.1 uF

10%

U15

24C64

365440

A01A12A2

3

GND4SDA

5

SCL

6

WP

7

VCC

8

R253
100K

1%

+

C206

1.0 uF

20%
35V

C276

0.1 uF

10%

R186

47.5K

1%

R273

100

1%

R169
274K

1%

U35

74HCT125

365078-125

4A

12

4OE*

13

1A

2

1OE*

1

2A

5

1Y

3

2Y

6

4Y

11

3OE*

10

3A

9

VCC

14

2OE*

4

GND

7

3Y

8

R287
1M

1%

R256
100K

1%

C279
1000 pF

5%

+

-

U32

AD1582C

SOT23/3P

365795

1

2

3

R257

100K

1%

R262
100K

1%

TP17

TP

1

R263
100K

1%

TP18

TP

1

TP19

TP

1

TP20

TP

1

TP21

TP

1

TP24

TP

1

+

C268

2.2 uF

10%

10V
SS-25131

D25
BAR43S

SS-35620

231

C270

0.1 uF

10%

R266
100K

1%

R264
100K

1%

R179

23.7K

1%

R181
NU

R196
10K

1%

R193
10K

1%

U75

LM7301

365661

OP

1

V-

2

-IP

4

+IP

3

V+

5

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

P3

P6

R2

R3 R5 R8 R9

P1

P11

R10 R11

R12

P2

R7

P5

P4

R6

P9

P10

R13

P12

P7

P8

R1

R4

+3.3VRX

+3.3VRX

+3.3VRX

+3.3VRX

+3.3VRX

+3.3VRX

+3.3VRX

+3.3VRX

RXVTF9

GND_SIGNAL1,2,3,4,5,6,7,8,9,11,12

RX_INPUT12

RSSI 1

IFOUT 3

2ND_LO_TUNE9

RXSINK12

IFAGC9

+3.3VRX 11

RXLO11

+3.3VRXEN11

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

10 12

024200716

E. HOOKER

D

1T

4T

11T

136-174 MHZ

2 POLE BANDPASS FILTER

LOWPASS FILTER & IF NOTCH

MIXER

IF AMPLIFIER

1T

4T

11T

7T-AW

IF IC

2nd LO

RF

181-219MHz

AMPLIFIER

2nd IF AMPLIFIER

1st

2 dB PAD

Transceiver Receiver

PLACE NEAR FL3-3

PLACE C230 NEAR PIN 16, C536 NEAR PIN 20

PLACE NEAR U28-9
(VMID)

L62

0.82 uH

2%

R219

12.1K

1%

C28
27 pF

5%

C290

0.1 uF

10%

R229

2.21K

1%

L19
15 nH

2%

R225
681

1%

L20
33 nH

2%

C1

0.1 uF

10%

L63
150 nH

10%

R217

12.1K

1%

C30
18 pF

2%

C7

0.01 uF

10%

C289
91 pF

5%

R238

1.5K

1%

L21
39 nH

2%

C3

0.1 uF

10%

C293

12 pF

2%

R218

2.67K

1%

C31
10 pF

0.25pF

L7

0.39 uH

2%

L65
680 nH

10%

L64

1.0 uH

2%

C75

5.6 pF

0.25pF

C4

1000 pF

5%

R282

68.1

1%

R220

3.01K

1%

L15

5T-AW

3400439-3

C87

1.8 pF

0.25pF

C8

1.0 pF

0.1pF

R284

68.1

1%

C57

1.8 pF

0.25pF

C27

0.1 uF

10%

C2

0.1 uF

10%

R283
150

1%

L12

680 nH

10%

L18

6.8 uH

5%

C5

1000 pF

5%

C294
NU

C241

0.01 uF

10%

C29
NU

L1

56 nH

2%

C536

0.1 uF

10%

C227
56 pF

5%

Q2
MMBR901

32099

1

2 3

C9

2.7 pF

0.1pF

C222

0.1 uF

10%

R6

2.67K

1%

L3

56 nH

2%

C34

0.1 uF

10%

C223
18 pF

2%

R10

3.01K

1%

C11

5.6 pF

0.1pF

C292

4.7 uF

10%

10V

R212

18.2K

1%

R11
332

1%

L9

56 nH

2%

U4
LP2980A-3.3

365460

VOUT

5

ON/OFF

3

VIN

1

GND2NC

4

R213

1.3K

1%

R4

51.1

1%

L4

100 nH

2%

L2

47 nH

2%

R204
NU

R5

51.1

1%

C12
120 pF

5%

C10

9.1 pF

0.1pF

L24

1.2 uH

10%

L17
82 nH

2%

L5

100 nH

2%

C302

0.1 uF

10%

R31

200K

1%

C23

150 pF

5%

C13

120 pF

5%

C19
2-10 pF

SS-28058

12

C6

39 pF

5%

R208
NU

L10

330 nH

5%

C14
18 pF

2%

R251

51.1

1%

C15
22 pF

2%

C215

0.1 uF

10%

L11

1.2 uH

5%

C56
10 pF

0.25pF

L22
150 nH

2%

R276

51.1

1%

C21
NU

R571

49.9

1%

R33

1.82K

1%

R1
10

1%

L13

470 nH

10%

C547
NU

R2
10

1%

FL1
45 MHz 4-POLE

1600471-1

1 4

235

6

C224

0.1 uF

10%

R8

332

1%

C230

0.1 uF

10%

C242

39 pF

5%

R203
100

1%

C237

8.2 pF

.1pF

Y1

44.545 MHz

1600407-1

4 1

2

3

C244

0.1 uF

10%

+

C229

4.7 uF

10%
10V

C26

0.01 uF

10%

U1
EMRS-1A

84586

RF

4

GND

2

IF

5

GND

6

GND

3

LO

1

C550

0.1 uF

10%

D26

SMV1236-011

29037

2 1

C214

0.1 uF

10%

U28

AD607ARS

365513

RFHI

6

RFLO

5

MXOP8VMID

9

IFOP

14

RSSI

12

LOIP

4

IFHI10IFLO

11

VPS120VPS2

16

PRUP

3

COM12COM2

13

GREF

7

DMIP

15

IOUT

18

FDIN

1

FLTR

19

QOUT

17

C248

0.1 uF

10%

Q1
MMBR941

32098

1

2 3

R250

1.5K

1%

C246

0.1 uF

10%

C231

0.1 uF

10%

L6

3400439-5

NC

D1
MMBD701

SS-36034

1 3

2

C256

0.1 uF

10%

C240

0.1 uF

10%

C284
91 pF

5%

T1
136-174MHz

1600462-1
2 5

4

1 3

C247

3.3 pF

0.25pF

NC

D2
MMBD701

SS-36034

13

2

FL3
455 kHz

37121

231

C285

2.2 pF

.25pF

T2

45MHz

1600463-1
2 5

4

1 3

FL2
455 kHz

37107

231

C236
NU

R280
20K

1%

L8

7T-AW

3400439-5

+

-

U29
OPA343

365701

1

V+

5

3

4

V-

2

C228

0.01 uF

10%

R281
20K

1%

R187
100K

1%

R222

49.9

1%

C225

0.1 uF

10%

C287

120 pF

5%

R9
100K

1%

SMV1204-136

D3

29050

3

21

R240
475

1%

L61
390 nH

10%

L25
100 nH

2%

R241
475

1%

L60

1.5 uH

2%

C61

120 pF

5%

R316
10

1%

C235
NU

SMV1204-136

D27

3

2 1

C286

3.3 pF

0.25pF

SMV1204-136

D28

3

2 1

C338

0.1 uF

10%

R230
332

1%

SMV1204-136

D4

3

21

C337

0.1 uF

10%

R12

51.1

1%

R215
10

1%

C18

8.2 pF

0.1pF

R206
10K

1%

R3

2.67K

1%

Q36
MMBR901

32099

1

2 3

R237
174

1%

C59

100 pF

5%

C22

0.1 uF

10%

C245

0.1 uF

10%

R236

1.3K

1%

Q35
MMBR901

32099

1

2 3

R7

3.01K

1%

C233

0.1 uF

10%

+

-

U27
LMC7101A

365438

1

V+

2

3

4

V-

5

C249

0.1 uF

10%

C226
56 pF

5%

C16
22 pF

2%

L14

5T-AW

3400439-3

R279
100

1%

R227

1.21K

1%

TP1

TP

1

C17
22 pF

2%

FL4
45 MHz 2-POLE

1600479-1

1 4

235

6

R224

1K

1%

TP2

TP

1

L16

1.8 uH

2%

C288
15 pF

2%

R214

1K

1%

TP3

TP

1

C25

6.2 pF

0.25pF

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

P20

R14

P18

R17

R18

R16

P26

P24

P25

P14

P13

P22

P15

P35

P34

P32

P33

P30

P31

P28

P29

R15

R19

P16

P36

R20

P17

P21

P27

P23

+3.3VDIG

+3.3VDIG

+3.3VRXS

+3.3VTXS

+3.3VTXS

+3.3VA

+3.3VA

+3.3VTXS

+3.3VA

+3.3VRXS

+3.3VTXS

4.5VSW_XCVR

+5VDIG

+3.3VDIG

7.5VA_XCVR

+5VDIG

+3.3VDIG

4.5VSW_XCVR

+3.3VRX

+5VDIG

7.5VA_XCVR

7.5VA_XCVR
+3.3VA

+3.3VRX

+3.3VTXS

20V

20V

+3.3VRXS

STD/SIDE 12

TX/RX 12

CTUNE9

REFOSCMOD9

SRENA2

+5VDIG 9

4.5VSW_XCVR8,12

+3.3VRX10

20VCLK1

PROGCLK2,9

SYNTHLOCK 1

+3.3VDIG12

RXLO 10

TXLO 12

GND_SIGNAL

1,2,3,4,5,6,7,8,

9,10,12

PROGDATA2,9

SYNTHENA2

TXVCOMOD9

7.5VA_XCVR8

+3.3VRXEN 10

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

11 12

024200716

E. HOOKER

D

TX VCO

RX VCO

SYNTHESIZER

REF OSC

NC

VOLTAGE
MULTIPLIER

BUFFER
AMPLIFIER

+3.5V

6.00VDC

Note: Use single
point ground here

RX BUFFER
AMPLIFIER

TX BUFFER
AMPLIFIER

Transceiver Synthesizer

KEEP VERY SHORT

C301
1000 pF

5%

C159

1000 pF

5%

D18

BBY40

SS-29029

1 3

R288
1M

1%

R102

1K

1%

D15

BBY31

SS-29031

1 3

C167
15 pF

5%

R292

100

1%

R135

0

C175
15 pF

2%

R145

4.75K

1%

L52

27 nH

5%

2 1

C176
15 pF

2%

U20

MIC5205

365499

VOUT

5

ON/OFF

3

VIN

1

BYP4GND

2

R130

2.21K

1%

C154
1000 pF

5%

L51

1.5 uH

10%

1 2

R295

86.6K

1%

R149
332

1%

C150

1000 pF

5%

L50
68 nH

5%

12

+

C121

1.0 uF

20%
35V

R296
332K

1%

R124

47.5

1%

C141

0.1 uF

10%

R322
10K

1%

L47

1.5 uH

10%

12

C310
470 pF

10%

R146

10

1%

+

C124

4.7 uF

10%
10V

C145

1000 pF

5%

L43
82 nH

5%

12

C200

0.1 uF

10%

D35
BAR43S

132

R150

5.62K

1%

C149

12 pF

2%

L44

1.5 uH

10%

1 2

C151

0.1 uF

10%

C308
.033 uF

10%

R137

4.32K

1%

L49

68 nH

5%

12

C546
.033 uF

C188
1000 pF

5%

C156

0.1 uF

10%

C309
.033 uF

10%

R136
182

1%

C178

0.1 uF

10%

L56
68 nH

5%

12

R159

121

1%

R152
511

1%

C168

1000 pF

5%

C182

1000 pF

5%

L48
56 nH

5%

12

C341
100 pF

C184
1000 pF

5%

R128

47.5

1%

C185

15 pF

5%

L55

1.5 uH

10%

1 2

C183

1000 pF

5%

R141

16.2

1%

C195
1000 pF

5%

L53
3400439-1

1 2

R92

7.5K

1%

C172
6800 pF

10%
22562-682

C307

.033 uF

10%

R142

16.2

1%

C53

10 pF

2%

C126

0.015 uF

10%

C177

0.068 uF

5%

C173
2200 pF

10%

R131

16.2

1%

R97

3.92K

1%

U77

LM7301

365661

OP

1

V-

2

-IP

4

+IP

3

V+

5

C161

0.022 uF

10%

R105

4.75K

1%

R95
15K

1%

C146

0.022 uF

10%

R293
100

1%

R101

2.21K

1%

R153

22.1

1%

R109
332

1%

+

C143

4.7 uF

10V
10%

U24

74HC595

365459-595

SER

14

SRCLK

11

SRCLR

10

RCLK

12

G

13

QA

15

QB

1

QC

2

QD

3

QE

4

QF

5

QG

6

QH

7

QH'

9

VCC

16

GND

8

R106

22.1

1%

C140
1000 pF

5%

R107

10

1%

+

C123

4.7 uF

10%
10V

SS-25122-475-10

C160
1000 pF

5%

R99

47.5

1%

R183
1M

1%

C131
3300 pF

5%

R104

4.32K

1%

R116
10K

1%

R110

5.62K

1%

R143

51.1

1%

C135

8.2 pF

.1pF

R129
1M

1%

R103
182

1%

C165

10 pF

2%

R96

4.32K

1%

C539
NU

R114
1M

1%

R100

47.5

1%

C166

9.1 pF

.1pF

U19

SA7025DK

365423

CLK

1

DATA

2

STROBE

3

VSS

4

AUXIN

10

VSSA

12

RFIN

5

RFIN*

6

REFIN

8

VCCP

7

VDD

20

TEST

19

LOCK

18

RF

17

RN

16

VDDA

15

PHP

14

PHI

13

PHA

11

RA

9

C136

6.8 pF

.1pF

+

C162

4.7 uF

10V
10%

R566
NU

R94
182K

1%

C169
27 pF

5%

L46
100 nH

2%

12

Q34
BSS123

1

32

R112
511

1%

+

C120

4.7 uF

10%
10V
SS-25122-475-10

C180
18 pF

2%

D16
BBY40

13

Q33
BSS123

SS-32564

1

32

+

C152

2.2 uF

10%

10V

C187
1000 pF

5%

R147

3.01K

1%

L45

100 nH

2%

12

C155

0.1 uF

10%

R148
267

1%

R133

2.21K

1%

D19

SMV1493-011

29054

2 1

U21

MIC4416BM4

365621

VS

3

CTL4GND

1

G

2

C163

1000 pF

5%

R132

182

1%

Q32
Si2301DS

1

3 2

Q24
MMBR901

1

2 3

R185

47.5K

1%

R125

47.5

1%

C340

0.01 uF

C174

4.7 pF

.25pF

Q31
Si2301DS

32631

1

3 2

Q26
MMBR901

1

2 3

R98

23.7K

1%

R138

16.2

1%

C181
1000 pF

5%

U17

MIC5205

1%
365499

VOUT

5

ON/OFF

3

VIN

1

BYP4GND

2

Q21
MMBR901

32099

1

2 3

C158

0.1 uF

10%

C132
220 pF

5%

R139

16.2

1%

C295

0.01 uF

10%

Q22
MMBR901

1

2 3

C164

1000 pF

5%

R144

16.2

1%

+

C118

1.0 uF

20%
35V

25122-105-35-A

Q25
MMBR901

1

2 3

R120

1.3K

1%

R121
NU

C170
15 pF

5%

U16

LP2980A-5.0

365413

VOUT

5

ON/OFF

3

VIN

1

GND

2

NC

4

Q23
MMBR901

1

2 3

TP8

TP

1

C148

1000 pF

5%

R117

1.1K

1%

Q27
MMBR901

1

2 3

C191

0.01 uF

10%

R115
475

1%

TP9

TP

1

C137
22 pF

2%

C192

0.1 uF

10%

R89
110K

1%

C142
22 pF

2%

R111
10

1%

TP10

TP

1

R160

10

1%

R87
10

1%

R122
121

1%

C339

0.1 uF

TP11

TP

1

C139

4.7 pF

.25pF

R118
681

1%

+

C193

1.0 uF

20%
35V

C133

1000 pF

5%

R156

1.1K

1%

TP13

TP

1

R123

35.7K

1%

+

C190

2.2 uF

20%
16V

C128

0.1 uF

10%

R155
825

1%

TP12

TP

1

C202
.033 uF

10%

R113
100

1%

+

C125

2.2 uF

10%
10V

R157
100

1%

TP7

TP

1

C203
.033 uF

10%

R119
100

1%

TP14

TP

1

C129

0.1 uF

10%

R154
475

1%

D23
BAR43S

SS-35620

132

R126
100

1%

C134

1000 pF

5%

R151

22.1

1%

D24

BAR43S

132

R140

22.1K

1%

R91
200K

1%

C138

22 pF

2%

C199
.033 uF

10%

R134

47.5K

1%

C130

1.0 pF

.1pF

R171
100K

1%

+

C201

1.0 uF

20%
35V

R127

22.1

1%

C144
1000 pF

5%

R178
1M

1%

R162

1K

1%

U42

12.8 MHz

37132

Vc

1

GND

2

OUT

3

Vcc

4

C186

1000 pF

5%

R173
100K

1%

Q46
MMBT3904

SS-32089-3904

1

2 3

R320

22.1

D20
SMV1207-001

13

C171

1000 pF

5%

+

C196

1.0 uF

20%
35V

D21

SMV1207-001

29036

1 3

C179
1000 pF

5%

R294

100

1%

C157

0.1 uF

10%

D17

SMV1213-001

29044

1 3

1

1

2

2

3

3

4

4

5

5

A A

B B

C C

D D

P38

R22R21 R23

P41P40

P43

P44

R29

P47 P49P45

R28

P46

P48

R30

R27

P42

P52

P53

P39

P50

R26R25

P51

R24

7.5VT_XCVR

+5VTX

+5VTX

VCONTROL

+5VTX

7.5VT_XCVR

TXSINK

4.5VSW_XCVR

TXSINK

4.5VSW_XCVR

+3.3VDIG

4.5VSW_XCVR

7.5VT_XCVR

VCONTROL

+3.3VDIG

7.5VT_XCVR

7.5VT_XCVR

TXLO11

PATEMP 1

7.5VT_XCVR8

TX/RX11

RXSINK 10

SIDERF 8

RX_INPUT 10

4.5VSW_XCVR8,11

PWRSET9

GND_SIGNAL1,2,3,4,5,6,7,8,9,10,11

+3.3VDIG11

TOPRF 8

STD/SIDE11

Scale

Rev

Sheet

of

Size

CAGE Code Dwg No.

None

23386

Drawn

Thales Communications, Inc.

Rockville, Maryland

Thursday, November 15, 2001

12 12

024200716

E. HOOKER

D

(FROM SYNTH)

PRE-DRIVER POWER MODULE

SENSOR LOCATED CLOSE
TO POWER MODULE

DETECTOR / POWER
CONTROL

TX/RX PIN
SWITCH

ANTENNA PIN
SWITCH

2 dB attenuator

Transceiver Transmitter

R74
100K

1%

L35

180 nH

5%

C114
10 pF

2%

R69
1K

1%

L37
100 nH

2%

L41

1.2 uH

2%

+

C108

4.7 uF

10%
10V
SS-25122-475-10

C86

15 pF

5%

R82

100K

D13

MA4P7001F

36047

2 1

R47
562

1%

L40

1.2 uH

2%

D14

MA4P7001F

36047

21

Q7

MMBR941

32098

1

2 3

Q14

BSS123

1

32

L80
NU

5%

D7

MA4P7001F

2 1

C83

10 pF

2%

Q16

BSS123

1

32

D8

MA4P7001F

36047

21

L30
6T#24-AW

3400439-9

C94
1000 pF

5%

D10

MA4P7001F

2 1

L31
5T#24-AW

3400439-10

C97

1000 pF

5%

D9

MA4P7001F

2 1

C84

6.8 pF

.25pF

C74

0.01 uF

10%

R73

1.82K

1%

C92

0.01 uF

10%

C98

1000 pF

5%

TP5

TP

1

R57
150

1%

R72

1.82K

1%

R319
0

TP6

TP

1

R55

1.3K

1%

L38

1.2 uH

2%

R52
475

1%

Q15
BSS123

SS-32564

1

32

U14

LP2980A-5.0

365413

VOUT

5

ON/OFF

3

4

4

VIN

1

GND

2

C216

0.1 uF

10%

C540
1000 pF

5%

Q18
BSS123

1

32

L28
120 nH

10%

R191
100

1%

R79
100K

1%

R49

10

1%

R81
100K

R44
475

1%

C78

1000 pF

5%

Q17

BSS123

1

32

Q19
BSS123

1

32

NC

D12

HSMS-2800

SS-35616

13

2

R80
100K

1%

NC

D11

HSMS-2800

SS-35616

1 3

2

C331

0.018 uF

10%

C104
390 pF

5%

+

C328

3.3 uF

10%
16V

C306

0.1 uF

C335

0.018 uF

10%

C103
390 pF

5%

L68

0.22 uH

10%

L39

1.2 uH

2%

C334

0.1 uF

10%

C109

0.1 uF

10%

R315

562

1%

C38

0.1 uF

10%

C82

22 pF

2%

C107
1000 pF

5%

C81

2.7 pF

.25pF

U3

LP2980A-3.3

365460

VOUT

5

ON/OFF

3

4

4

VIN

1

GND

2

L42

6T-AW

3400439-11

U11

LM50B

365437

GND

3

+V

1

OUT

2

+

C43

4.7 uF

10%
10V
SS-25122-475-10

R66

51.1

1%

RF IN

VGG

VDD

RF OUT

U37

M68776-E01

84604

1

2

3

4

5

R68
100K

1%

C332

0.018 uF

10%

R67

51.1

1%

B1
50@100

45270

Q10
Si2301DS

32631

1

3 2

C95

3300 pF

5%

C100

1000 pF

5%

Q12
Si2301DS

32631

1

3 2

R71
20K

1%

U12

20 dB Coupler

1600458-1

3 1

5

2

4

Q13
Si2301DS

32631

1

3 2

+

-

U13

LMC7101A

365438

3

4

1

5 2

R78

47.5

1%

Q11
Si2301DS

32631

1

3 2

R85

47.5

1%
1/10W

C110

0.01 uF

10%

C127

1.5 pF

.1pF

R75

2.21K

1%

R84

43.2

1%

R64

0

R77

43.2

1%

R70
1K

1%

R83

43.2

1%

C106
1000 pF

5%

R76

43.2

1%

C105

1000 pF

5%

C111

1000 pF

5%

C96
1000 pF

5%

C209

6.8 pF

.25pF

R65
NU

C88

0.01 uF

10%

C115
10 pF

2%

R558
562

1%

C102

1000 pF

5%

C77

10 pF

2%

C113

1000 pF

5%

R557
562

1%

C101

1000 pF

5%

R48
2K

1%

C112

1000 pF

5%

C336

0.01 uF

10%

R51

51.1

1%

C116
1000 pF

5%