Technisonic Industries Limited TiL-91-DE/8.33 Installation And Operating Instructions Manual

VHF/AM

LOW COST BASE STATION

MODEL TiL-91-DE/8.33

7 WATT BASE STATION SYSTEM

NO. 910807 Opt. 8.33

(TLC-150/8.33)

Installation and

Operating Instructions

Til Document No.

02RE310

Rev. N/C

November 2002

Technisonic Industries Limited

240 Traders Blvd., Mississauga, Ontario L4Z 1W7 Tel:[phone] Fax:[phone]

web site : www.til.ca

WARNING

Do not make physical contact with antenna when transmitter is on. This unit can produce up to 10 watts of
power.

CAUTION

This unit contains static sensitive devices. Wear a grounded wrist strap and/or conductive gloves when
handling printed circuit boards.

WARRANTY INFORMATION

The Base Stations, Model 91-DE series and Model Til 90-6R series are under warranty for one year from
date of purchase. Failed units caused by defective parts, or workmanship should be returned to:

Technisonic Industries Limited
240 Traders Blvd.
Mississauga, Amherst, NY
Ontario L4Z 1W7

Tel: [phone] Tel: [phone]
Fax: [phone]

A Page

TABLE OF CONTENTS

Paragraph Title Page

SECTION 1 GENERAL DESCRIPTION

1.1 Introduction ........................................................... 1-1

1.2 Description ........................................................... 1-1

1.2.1 Transceivers - Models Til-91-DE/8.33, Til-90-6R/8.33 ......................... 1-2

1.2.2 Power Supply Modules - Model SPG-010, P/N 911008-1 . ..................... 1-2

1.2.3 Microphone P/N 861902 ................................................ 1-3

1.2.4 Antenna ............................................................. 1-3

1.3 Modes of Operation .................................................... 1-3

1.3.1 Transmit/Receive Modes (Local Mode) .................................... 1-3

1.3.2 Local/Remote Operation ................................................ 1-4

1.3.3 AC and DC Operation .................................................. 1-4

1.4 Technical Summary.................................................... 1-5

SECTION 2 PREPARATION FOR USE AND STORAGE

2.1 Introduction ........................................................... 2-1

2.2 Disassembly/Assembly ................................................. 2-1

2.2.1 Remove/Replace Microphone ............................................ 2-1

2.2.2 Remove/Replace Transceiver Unit ........................................ 2-1

2.3 Loudspeaker, Headphone Installation ..................................... 2-2

2.3.1 External Loudspeaker .................................................. 2-2

2.3.2 Headset ............................................................. 2-2

2.4 Operational Check ..................................................... 2-2

2.5 Storage .............................................................. 2-2

SECTION 3 GENERAL OPERATING INSTRUCTIONS

3.1 Introduction ........................................................... 3-1

3.2 Preparation for Use .................................................... 3-1

3.3 Transmitter Operation .................................................. 3-2

3.4 Receiver Operation .................................................... 3-3

3.5 Switching OFF ........................................................ 3-4

3.6 Battery Charging ...................................................... 3-4

i

TABLE OF CONTENTS (Continued)

Paragraph Title Page

SECTION 4 TRANSCEIVER SET UP and OPERATING INSTRUCTIONS

Index to Section 4 ...................................................... 4-1

LIST OF TABLES

Table No. Title Page

1-1 Base Station Configurations ............................................. 1-1

1-2 Remote Control Connector Signals ....................................... 1-4

(Refer to Index to Section 4, Pg 4-1 for Tables located in Section 4)

LIST OF ILLUSTRATIONS

Figure No. Title Page

(Refer to Index to Section 4, Pg 4-1 for Illustrations located in Section 4)

ii

1.1 INTRODUCTION

This publication provides general information on the VHF/AM Low Cost Base Station Systems Nos.
910807, Opt. 8.33 (TLC-150/8.33) and 910907, Opt .8.33 (TLC-100/8.33) manufactured by
Technisonic Industries Limited. The /8.33 suffix or option indicates that this model of transceiver is
capable of operation with 8.33 kHz or 25 kHz channel spacing. Specific information on the VHF/AM
Transceiver Model indicated on the front cover can be found in Section 4 of this document. The Opt.

8.33 indicates that a version of the Model 91-DE transceiver with 26 memory positions and 8.33/25 kHz
spacing capability is utilized in the system as opposed to the 10 memory positions and 25 kHz spacing
capability of the standard 91-DE unit.

These 7 watt Base Station Systems consist of a simplex transceiver complete with microphone,
capable of 8.33 kHz or 25 kHz channel spacing operating over the frequency range of 117.975 MHz
to 138.000 MHz. The Base Station Systems are intended for base station operation in an air traffic
environment. These systems can operate from AC power or external DC battery power.

1.2 DESCRIPTION

The two low cost base station configurations employ either the keypad entry transceiver (91-DE/8.33)
or six channel pre-programmable transceiver (90-6R/8.33) which allow 7 Watt operation. Both base
station systems consist of a Model 91-DE/8.33 or 90-6R/8.33 Transceiver, Model SPG-010 Power
Supply/Battery Charger and a Microphone. Refer to Table 1-1 for system configuration details.

SECTION 1

GENERAL DESCRIPTION

TABLE 1-1 BASE STATION CONFIGURATIONS

System Transceiver Microphone Power

91-DE, 7W Low Cost
Base Station System
No. 920607 Opt. 8.33
(TLC-150/8.33)

90-6R, 7W Low Cost
Base Station System
No. 920707 Opt. 8.33
(TLC-100/8.33)

Model 91-DE /8.33
P/N 901006-2, Opt.

8.33

Model 90-6R/8.33
P/N 861605-2, Opt.

8.33

1-1

Supply

P/N 861902-1 SPG-010

P/N 911008-1

P/N 861902-1 SPG-010

P/N 911008-1

1.2 DESCRIPTION - continued

To improve the rejection of interfering signals, dual conversion receiver technology has been
incorporated on the Transmitter/Receiver (Module A1) board used in Technisonic VHF/AM base
stations. The second IF is 455kHz using a ceramic filter, which is immune to high energy ringing.
The dual conversion module also has a second local oscillator, second mixer and ceramic filter.
The first local oscillator is the original VCO.

The dual conversion receiver board, P/N 003494-1 was implemented into all transceivers capable of
supporting 8.33kHz or 25kHz channel spacing. An option label on the chassis will indicate OPTION

8.33 if the dual conversion board is installed.

The dual conversion receiver’s squelch knob must be rotated significantly more clockwise (4
o’clock position) to obtain the same squelch setting (3uV) as a single conversion receiver’s
squelch knob set to the 12 o’clock (straight up) position.

If the dual conversion receiver’s squelch knob is set to the 12 o’clock position, signals with a level
greater than 0.5uV will open the squelch. At most airports this will not be an adequate level of
squelch. Please be aware of this squelch knob adjustment variance when setting and/or
comparing squelch levels of dual conversion vs. single conversion base stations.

1.2.1 Transceivers - Models TiL-91-DE/8.33, TiL-90-6R/8.33,

The basic model of either transceiver is provided for the 7 Watt Base Stations. An optional 9-pin "D"
connector (Option 2) is available on each transceiver to facilitate remote operation. Refer to Section
4 for specific details on the Transceiver Model unique to the System indicated on the Front Cover of
this document.

1. Transceiver Model TiL-91-DE/8.33, Part Number 901006-2, Opt. 8.33

Transceiver Model Til-91-DE/8.33, is a microprocessor controlled VHF/AM 7 watt transceiver
operating over the entire band of 117.975 to 138.000 MHz in 25 kHz or 8.33 kHz steps. The
transceiver will store (25) user selected frequency channels in addition to the resident emergency
channel of 121.500 MHz. Frequency Selection, Storage, Recall, Channel Scan, Search, and Toggle
modes are all selected by the 12 key keypad. Current operating frequency is displayed on a backlit
liquid crystal display (LCD).

2. Transceiver Model TiL-90-6R/8.33, Part Number 861605-2, Opt. 8.33

Transceiver Model 90-6R/8.33, is a 7 watt VHF/AM transceiver which operates in simplex on six pre­programmable, frequency synthesized channels, with 25kHz or 8.33kHz channel spacing in the
frequency range 117.975 MHz to 138.000 MHz.

1.2.2 Power Supply/Battery Charger - Model SPG-010, P/N 911008-1

The Model SPG-010 converts 120 VAC to provide the 13.7 VDC supply voltage to the Transceiver
and houses a battery charger which can provide trickle charging to external rechargeable batteries,
if connected to the terminal block on the rear of the unit. When external batteries are connected the
unit will automatically revert to DC operation if the AC main power fails. A 220Vac version of the SPG­010 can be specially ordered.

1-2

1.2.3 Microphone P/N 861902-1

Microphone Assembly Part Number 861902-1, Series 1, is a rugged hand-held microphone housed
in a high impact plastic case. The dynamic microphone is a noise cancelling type with a two-stage
pre-amplifier, press-to-talk switch, and a retractable three-core cable terminated by a three-pin, male
contacts, connector which mates with the MIC/PTT connector located on the front panel of the
transceiver. The dc supply for the microphone is supplied by the transceiver. The microphone bracket
can be mounted on the left or right side of the SPG-010 Power Supply/Battery Charger as required.

1.2.4 Antenna

This unit is designed for use with a 50 ohm impedance antenna (not supplied). A 50 ohm RFUHF type
connector is provided on the rear of the transceiver unit for interfacing with an antenna.

1.3 MODES OF OPERATION

Refer to Section 4 for additional operating modes.

1.3.1 Transmit/Receive

The transceiver may be operated in either of two modes; transmit or receive, as selected by the
Press-to-Talk (PTT) switch on the microphone.

(1) TRANSMIT MODE - When the PTT switch on the microphone is pressed, the transceiver

operates in the transmit mode. The PTT signal line is grounded by the microphone PTT
switch via the microphone lead and the MIC/PTT connector to the transceiver. The Tx ON
amber LED will go ON, indicating that the transmitter is activated.

Transmission will occur on the channel frequency indicated on the front panel. Refer to
Section 4 for transceiver details

(2) RECEIVE MODE - When the PTT switch on the microphone is released, the transceiver

operates in the receive mode. The Tx ON amber LED will go OFF, indicating that the
transmitter is inhibited. Reception of the frequency displayed on the transceiver will occur.

The setting of the SQUELCH CONTROL determines the squelch threshold level. When the
SQUELCH CONTROL is rotated in the counter-clockwise direction, the SQUELCH
INDICATOR green LED will go ON, indicating that the squelch circuit is connecting the
demodulated audio to the VOLUME CONTROL. The setting of the VOLUME CONTROL
determines the audio level produced from the internal speaker. When the VOLUME
CONTROL is adjusted in the clockwise direction, the audio level will increase.

NOTE

When the connector of the external loudspeaker or
head phone is connected to the SPEAKER/PHONE
jack, the internal loudspeaker is disconnected and the
VOLUME CONTROL will control the audio level of the
external loudspeaker or headphone.

1-3

1.3.2 Local/Remote Operation (Option 2 required)

The Low Cost Base Station can only be operated in the Remote mode if the transceiver is ordered
with a remote 9-pin connector (extra cost option) which is located on the side of the transceiver
chassis.

Base Stations which employ the Model TiL 91-DE/8.33 or the TiL-90-6R/8.33 transceiver operate in
local and remote modes simultaneously. Older 91-DE units employ a front panel switch for local or
remote selection.

1. LOCAL OPERATION - In local operation, voice audio, and keying (PTT) functions are routed
from the microphone to the transceiver. Receive audio is routed to the internal loudspeaker.

2. REMOTE OPERATION - In Remote operation, transmit audio, keying (PTT), and receive
audio signals and others are available on the 9-pin "D" connector. See Table 1-2 for remote
connector signal details.

NOTE

In the 90-6R and 91-DE the audio and PTT signals are
connected in parallel. This allows the PTT and T X
audio to be functional on the 9-pin connector as well
as on the microphone connector. The RX audio is
routed to the internal speaker via the volume control
and to the 9-pin connector at a constant level.

TABLE 1-2 REMOTE CONTROL CONNECTOR SIGNALS

PIN

91-DE "9 pin" Connector Signals PIN

NO

Remote RX Audio Signal (100Ω)

2

Squelch

6

Remote Recorder Signal (100Ω)

3

+5 Vdc

9

Microphone - TX Audio (220Ω)

4

Remote PTT

5

Ground

1

Clock Out

7

Strobe Out

8

1.3.3 AC and DC Operation

The unit can be operated by external 120 VAC or external 13.7 VDC battery power.

1. AC OPERATION - During AC operation, the unit can trickle charge external batteries via the
+/- Battery connections located on the terminal block mounted on the rear of the SPG-010
Power Supply. The external battery ON/OFF switch must be in the ON position for these
functions to occur when an external battery is connected. A 220Vac version of the SPG-010
can be specially ordered.

NO

2
3
7
9
5
1
6
8
4

90-6R "9-pin" Connector Signals

Remote TX/RX Audio (100Ω)
Remote Recorder Signal (150Ω)
Remote Rx Audio Signal (600Ω)
+5 Vdc
PTT
Ground
Squelch
RF Indicator
Microphone - TX Audio (220Ω)

1-4

2. DC OPERATION - The transceiver unit can be operated from an external DC battery supply
within the range of 11.5 Vdc to 15.0 Vdc. A DC connector is mounted on the rear of the 91­DE or 90-6R which mates with DC Power Cable P/N 863701-1 (Supplied). Spade
connectors are provided on the other end of this cable to mate with the DC +/- output
connections on the terminal block of the SPG-010. A 12 Volt Battery Back-up Kit (7.2 AH),

P/N 989979-2 is available. See section 3.6 of this document for details.

1.4 TECHNICAL SUMMARY

A summary of electrical, operational, mechanical and physical characteristics of the Base Station are
provided in Tables 4-1.

1-5

PREPARATION FOR USE AND STORAGE

2.1 INTRODUCTION

This section provides the information required for use and storage of the low cost base station. Refer
to Section 4 for Channel/Frequency configuration.

2.2 DISASSEMBLY/ASSEMBLY

2.2.1 Remove Replace Microphone

REMOVAL

(1) Disconnect microphone from front panel of transceiver. Slide microphone clear of bracket.

(2) Remove and Retain two screws securing microphone bracket to the side of the SPG-010

Power Supply/Battery Charger.

REPLACEMENT

(1) Secure microphone bracket to left or right side of the SPG-010 Power Supply/Battery

Charger as required, with two screws and two washers.

SECTION 2

(2) Connect microphone to front panel connector on transceiver. Slide microphone onto bracket.

2.2.2 Remove/Replace Transceiver Unit

REMOVAL

(1) Disconnect the DC cable and RF antenna cable from the appropriate connectors located at

the rear of the transceiver.

(2) Remove and retain the two wing screw and nylon washers securing the transceiver to the

"U" shaped mounting bracket located on the SPG-010 chassis.

(3) Slide the transceiver upward to clear the "U" shaped mounting bracket.

REPLACEMENT

(1) Slide the transceiver downward into the mounting bracket, aligning the mounting bracket

holes with the threaded transceiver mounting holes.

2-1

(2) Screw transceiver to the mounting bracket using the two wing screws and nylon washers

included in Mounting Hardware kit, Part Number 869024-1.

(3) Adjust angle of transceiver on nylon clutches as required, before tightening the two wing

screws.

2.3 OPTIONAL LOUDSPEAKER, HEADPHONE INSTALLATION

Provision is made for connection of an external loudspeaker or headphone to the SPEAKER/PHONE
jack of the transceiver, as shown in Figure 4-1.

2.3.1 External Loudspeaker

When an external loudspeaker is to be installed, an 8-ohm nominal impedance loudspeaker should
be used. The loudspeaker cable should be terminated by a 1/4 in., 3-pole telephone plug (male), with
the loudspeaker connected between tip and sleeve (ground). Insert the external loudspeaker
connector into the SPEAKER/PHONE jack located on the front panel of the transceiver. When the
external loudspeaker is connected to the transceiver SPEAKER/PHONE jack, the internal
loudspeaker is automatically disconnected.

2.3.2 Headset

Headset impedance should be 150 to 600 ohms. The headset cable must terminate in a 1/4 in.,
3-pole telephone plug (male), to mate with the SPEAKER/PHONE jack located on the front panel of
the transceiver. The internal loudspeaker is automatically disconnected. Connect the headset as
indicated below for receiver audio with or without transmit audio.

(1) HEADSET WITHOUT TRANSMIT AUDIO - When receiver audio only without transmit audio

is required, the headset should be connected between the tip and sleeve (ground) of the
telephone plug.

(2) HEADSET WITH TRANSMIT AUDIO - When receiver audio with transmit audio is required,

the headset should be connected between the ring and sleeve (ground).

2.4 OPERATIONAL CHECK

Perform an operational check of the transceiver after all adjustments. Check each channel in use in
both the transmit and receive modes of operation, using the Operating Instructions given in Section
3 of this document and the appropriate specified operating procedures during transmission.

2.5 STORAGE

To store for an extended period, store unit in a dry place, in the original shipping container.

2-2

GENERAL OPERATING INSTRUCTIONS

3.1 INTRODUCTION

This section covers general operating procedures applicable to all base station configurations. Set
Up and Operating details for specific transceiver Models can be found in Section 4.

3.2 Preparation for Use

To prepare the transceiver for use (Refer to Figures 4-1, 4-2 and Table 4-2).

(1) Location for Transmit/Receive Operation.

The VHF frequency band is essentially line of site communication. When selecting an
antenna location there should be no obstacles between the communicating radio sites.
Objects greater than two metres will reflect The RF signal and foliage greatly attenuates
signal strength.

Do not make physical contact with antenna when
transmitter is on. This unit can produce up to 10 Watts
of power.

SECTION 3

WARNING

(2) Install Microphone in Microphone (PTT) connector.

(3) Ensure that transceiver POWER ON/OFF switch and the SPG-010 Power supply, AC and

External Battery ON/OFF switches are set to OFF.

(4) Install AC line cord in AC chassis connector on rear panel of the SPG-010 Power

Supply/Charger. Hook-up External Battery to appropriate connector on rear panel of the
SPG-010 Power Supply if required.

(5) Connect antenna connector to rear of transceiver chassis UHF connector.

(6) Connect 9-pin connector for Remote Operation (91-DE Transceiver with 9-pin connector

ONLY).

(a) For Remote Operation Connect appropriate wires to the 9-pin connector provided

on the side of the transceiver. Note: Unit will operate locally and remotely in parallel.

NOTE

Refer to Paragraph 1.3.2 of this document for remote
operation details.

NOTE

The following operating procedures are intended
specifically for Local Operation.

(7) Ensure that the microphone connector is connected to the MIC/PTT connector of the

transceiver.

3-1

(8) Set the SQUELCH control in the fully counter-clockwise (CCW) position.

(9) Set the VOLUME control in the 12 o'clock centre position.

(10) Set the AC POWER, External Battery (if connected) and transceiver ON/OFF switch to "ON".

(11) Verify that the FUSE BLOWN red LED on the transceiver is OFF.

(12) Verify that the POWER ON green LED on both the transceiver and Power Supply are ON.

(13) Proceed to operate in the transmit mode, paragraph 3.3 or operate in the receive mode,

paragraph 3.4 as required.

3.3 Transmitter Operation

To operate the transceiver in the transmit mode, proceed as follows:

(1) Hold the microphone in one hand, with the upper edge of the microphone as close as

possible to the upper lip.

This technique activates the noise cancelling feature
of the microphone. The microphone is most effective
when sound is ½ inch (12.7 mm) or more away from
the microphone.

NOTE

(3) Press and hold the PRESS-TO-TALK switch of the microphone during transmission.

(4) Ensure that the Tx ON amber LED is ON.

(5) Speak slowly and distinctly into the microphone using specified operating procedures during

transmission.

(6) When message is ended, release the PRESS-TO-TALK switch of the microphone.

(7) The transceiver is now operating in the receive mode.

(8) Verify that the Tx ON amber LED is OFF.

(9) Refer to Section 4 for Transceiver specific Operation and additional operating modes.

3-2

3.4 Receiver Operation

To operate the transceiver in the receive mode, proceed as follows:

(1) Ensure that the PRESS-TO-TALK switch on the microphone is NOT depressed, and verify

that the Tx ON amber LED is OFF.

(2) Verify that the correct operating frequency is indicated on the front panel. Refer to Section

4 for Channel/Frequency selection.

(3) Adjust the SQUELCH control to suit local reception conditions. When the SQUELCH control

is rotated in the counter-clockwise direction, the SQUELCH indicator green LED will switch
to ON, indicating that the squelch circuit is connecting the demodulated audio output to the
VOLUME control.

Further adjustment of the SQUELCH control determines the squelch setting.

IMPORTANT NOTE

The dual conversion receiver’s squelch knob must be rotated significantly more clockwise (4
o’clock position) to obtain the same squelch setting (3uV) as a single conversion receiver’s
squelch knob set to the 12 o’clock (straight up) position.

If the dual conversion receiver’s squelch knob is set to the 12 o’clock position, signals with
a level greater than 0.5uV will open the squelch. At most airports this will not be an adequate
level of squelch.

Recommended procedure:
The squelch taper on a dual conversion receiver looks as follows:

Squelch knob position Squelch setting

12 o’clock 0.5uV

3 o’clock 1.2uV
3:30 position 2.5uV
4 o’clock 3uV
Fully clockwise 9uV

It is recommended that the squelch be set to at least 2.5uV (3:30 knob position) at busy
airport locations. If ACARS signals are present on adjacent or nearby channels the squelch
level should be at least 3uV (4 o’clock) to prevent ACARS bleed through.

(4) The VOLUME control can then be adjusted in a clockwise direction to increase the audio

level, or in a counter-clockwise direction to decrease the audio level which can be heard on
the internal loudspeaker.

NOTE

When an external loudspeaker or headset is
connected to the SPEAKER/PHONE jack of the
transceiver, the internal loudspeaker is automatically
disconnected. The VOLUME control will now control
the audio level applied to the external loudspeaker or
headset, as applicable.

3-3

(5) Refer to Section 4 for transceiver specific operating modes.

3.5 Switching OFF

To switch off the Low Cost Base Station:

(1) Set the POWER ON/OFF on transceiver to switch to OFF.

(2) Verify that all indicator LED's on the front panel are OFF.

(3) Set the External Battery ON/OFF switch on the SPG-O10 Power Supply to OFF.

(4) Set the AC ON/OFF Power Switch on the SPG-010 Power Supply/Battery Charger to the

OFF position.

3.6 Battery Charging

(1) Set AC ON/OFF switch to OFF.

(2) Set External Battery ON/OFF switch to OFF.

(3) Connect the batteries to be charged, to the appropriate terminals located on the rear of the

SPG-010 Power Supply/Charger.

(4) Set AC ON/OFF switch to ON.

(5) Set External Battery ON/OFF switch to ON.

The following battery back-up kit is available for use with the TLC-150 or TLC-100 base station:

P/N 989979-2
12 Volt Battery Back-up Kit (7.2 AH)

Provides a minimum of 6.5 hours back-up for 7 watt unit with 20% Tx and 80% Rx duty cycle.
Kit includes:
qty. (1) p/n 027330-1, DC mating cable with battery connectors.
qty. (1) p/n LCR 12V7.2P, 7.2 amp hour sealed lead acid battery.
qty. (1) packing log/ instructions.

3-4

SECTION 4

OPERATING INSTRUCTIONS

INDEX TO SECTION 4

Paragraph Title Page

SECTION 4 TRANSCEIVER SET UP and OPERATING INSTRUCTIONS

4.1 Introduction ........................................................... 4-2

4.1.1 Transceiver Model TiL-91-DE/8.33, P/N 901006-2 Opt.8.33 .................... 4-2

4.1.2 Scan Search and Toggle Modes .......................................... 4-2

4.1.3 Technical Summary.................................................... 4-2

4.2 Operators Switches, Controls and Indicators ................................ 4-2

4.3 Front Panel Keypad Operation ........................................... 4-7

4.3.1 Keypad "Beeps" ....................................................... 4-8

4.3.2 Keypad and LCD Display Lighting ......................................... 4-8

4.3.3 Transmitter Time-out ................................................... 4-8

4.3.4 Selecting a Frequency .................................................. 4-8

4.3.5 Storing a Frequency to a Channel ........................................ 4-10

4.3.6 Recalling a Stored Channel . . ........................................... 4-11

4.3.7 Transmit Inhibit ....................................................... 4-11

4.3.8 Toggling Between Two Channels ........................................ 4-12

4.3.9 Search Mode ........................................................ 4-12

4.3.10 Scan Mode .......................................................... 4-12

4.4 Fixed Channel Frequency Set Up ........................................ 4-15

4.4.1 System Configuration.................................................. 4-15

4.4.2 Transceiver Disassembly/Assembly ...................................... 4-15

4.4.3 Operational Check .................................................... 4-15

LIST OF TABLES

Table No. Title Page

4-1 Model Til-91-DE Transceiver Leading Particulars ............................ 4-3

4-2 Operators Switches, Controls and Indicators ................................ 4-5

4-3 Channel/Function Selector Keypad ........................................ 4-7

LIST OF ILLUSTRATIONS

Figure No. Title Page

4-1 91-DE Low Cost Base Station Front Panel Layout ............................ 4-4

4-2 91-DE Low Cost Base Station Rear Panel Layout ............................ 4-4

4-3 Fixed Channel Jumper Locations ........................................ 4-14

4-1

4.1 INTRODUCTION

4.1.1 Transceiver Model TiL-91-DE/ 8.33, P/N 901006-2 with Option 8.33

The Transceiver is a microprocessor controlled VHF/AM transceiver operating over the entire band of

117.975 to 138.000 MHz in 25 KHz steps. The transceiver will store ten user selected frequency

channels in addition to the resident emergency channel of 121.500 MHz. Frequency Selection, Storage,
Recall, Channel Scan, Search, and Toggle modes are all selected by the 12 key keypad. Current
operating frequency is displayed on a backlit liquid crystal display (LCD).Option 2 of Model Til-91­DE/8.33 P/N 901006-2 with Option 8.33 has an external 9-pin connector installed on the side of its
chassis to support remote Tx/Rx functions..

4.1.2 Scan, Search, and Toggle Modes

1 . SCAN MODE - In Scan Mode, the transceiver cycles through the preset Channel Frequencies

and locks on to the first channel received in scan sequence. Audio is enabled for 5 seconds
for operator identification. Pressing the Press-to-Talk switch exits the scan mode. If there is
no operator action then the transceiver remains operating in the scan sequence continuously.

2. SEARCH MODE - In Search mode the transceiver cycles through the preset Channel
Frequencies and locks on to the first channel received in the scan sequence and normal
operation is resumed.

3. TOGGLE MODE - In toggle mode the transceiver alternates between the current channel
selection and the previous channel selected.

4.1.3 Technical Summary

A summary of electrical, operational, mechanical and physical characteristics of the transceiver, is
provided in Table 3-1.

4.2 OPERATOR'S SWITCHES, CONTROLS AND INDICATORS

A view of the front and rear panel is given in Figure 4-1 and 4-2. A functional description of each of
the operator's switches, controls and indicators, and the microphone PRESS-TO-TALK switch, is given
in Table 4-2, Operator's Switches, Controls and Indicators and in Table 4-3, Channel/Function Selector
Keypad.

This section includes a functional description of each switch, control, indicator and connector located
on the front and rear panels of the portable transceiver, including the PRESS-TO-TALK switch located
on the microphone. Operating instructions for transmit/receive and the special functions are also
included.

4-2

TABLE 4-1 MODEL TiL-91-DE/8.33 TRANSCEIVER LEADING PARTICULARS

GENERAL:
Dimensions & Weight:

Width ................................... 216 mm (8.5 in) MAX

Height ................................... 70 mm (2.75 in) MAX

Depth ................................. 260 mm (10.25 in) MAX

Weight................................. 1.8 Kg (3 lb 15 oz) MAX

Frequency Range ..................... 117.975MHz to 138.000MHz

Channel Spacing:

Wideband (Normal) ..................................... 25kHz

Narrowband ........................................ 8.33kHz

Frequency Selection.....................Keypad entry, 26 memories

Duty Cycle ............... One Minute Transmit/Four Minutes Receive

TRANSMITTER CHARACTERISTICS:

Power Output ................................... 5 to 10 Watts

Output Power Stability After One Minute .................... ±1Watt

VSWR ................................................. 4:1

Carrier Stability (-40 C to +55 C) ................ ±1,000Hz maximum

Incidental FM and PM Due to Modulation ............ . ±100Hz max.

Rise Time to 90% of Rated Power............... 100miliseconds max.

Audio Input ............................... 50millivolts to 2Vrms

Speech Processor Dynamic Range ...................35 dBminimum

Modulation Capability ............................... Up to 95%

Audio Distortion (with 90% modulation) .............. 10% maximum

Audio Frequency Response ............. 300 Hz to 2,500 Hz, +1 -3 dB

Spurious Emissions .......................... 60 dB below carrier

Hum and Noise Level ................. 45 dB below modulated carrier

RECEIVER CHARACTERISTICS:

RF Input Circuit ........... 50-ohms unbalanced, VSWR 2:1 maximum

Sensitivity (12 dB SINAD) 1 KHz 30% modulation ......... 1.8 microvolts

Selectivity, 25 kHz Channel Spacing:

Bandwidth at 6dB Points ............ More than 15 KHz (±7.5kHz)

Bandwidth at 60dB Points ............. Less than 22 KHz (±11kHz)

Selectivity, 8.33kHz Channel Spacing:

Bandwidth at 6B Points .. ............... More than 10kHz(±5kHz)

Bandwidth at 60B Points .. ............. Less than 15kHz(±7.5kHz)

Adjacent Channel Selectivity (for 25 kHz and 8.33 kHz).. . . . At least 80 dB

Pass Band Symmetry. ............................ 15% maximum

IF Band Pass Ripple Between -6dB Points.. ........... 2 dB maximum

Spurious Response Attenuation .....................At least 90 dB

Frequency Stability (-40EC to +55EC)................ ±1,000 Hz max.

AGC Characteristics With RF Input Signal

5 microvolts to 1 volt ......................... Audio Level:±3dB

4-3

Figure 4-1 Til-91-DE Low Cost Base Station Front Panel Layout

Figure 4-2 Til-91-DE Low Cost Base Station Rear Panel Layout

4-4

No.

TABLE 4-2 OPERATORS SWITCHES, CONTROLS AND INDICATORS

SWITCHES

CONTROLS &

FUNCTIONAL DESCRIPTION

INDICATORS

1POWER

ON/OFF
SWITCH

2 POWER ON

LED

A toggle switch applies the 13.7 volts nominal power supply to the
transceiver. The transceiver is switched to ON in the toggle UP position and
is switched OFF in the toggle DOWN position.

A GREEN LED indicates when the POWER ON/OFF switch is set to ON
and voltage is applied to the transceiver.

INDICATOR

3 FUSE A 5 Amp FUSE protects the 13.7 volts dc nominal power supply line.

4 FUSE BLOWN

RED LED

A RED LED indicates when the 5-Amp fuse is "blown", and External DC
Battery or AC power is present.

INDICATOR

5SQUELCH

CONTROL

A linear potentiometer determines the squelch threshold level. When the
SQUELCH CONTROL is rotated in the counter-clockwise direction, the
SQUELCH GREEN LED indicates that the squelch is connecting
demodulated audio to the VOLUME control.

6SQUELCH

INDICATOR

A GREEN LED indicates the squelch circuit is connecting demodulated
audio signal to the VOLUME control.

GREEN LED

7Tx ON

AMBER LED
INDICATOR

An AMBER LED indicates when the transceiver is keyed by the microphone
PRESS-TO-TALK (PTT) switch or rem ote land line, and the transceiver is
operated in the Tx mode. The Tx ON AMBER LED switches OFF, when the
transceiver is operated in the receive mode.

8VOLUME

CONTROL

A logarithmic potentiometer determines the audio level applied to the internal
speaker when the transceiver is operated in the receive mode. When the
SPEAKER/PHONE connector is in use the internal loudspeaker is
disconnected and the VOLUME CONTROL sets the audio level applied to
the external speaker or headphone.

9MIC/PTT

CONNECTOR

A 5-pin connector functions as Microphone/PTT and Test Connector.

Pin 1 - PTT Signal Line
Pin 2 - Microphone Signal Ground
Pin 3 - Microphone Signal and Microphone DC Supply Line
Pin 4 - AGC test voltage
Pin 5 - Squelch test voltage

10 MICROPHONE

PTT

PRESS-TO-TALK (PTT) switch determines transceiver operating mode.
When the PTT switch is pressed, the transceiver operates in Tx mode. When
the PTT switch is released, the transceiver operates in Rx mode.

11 LOC/REMOTE

SWITCH

Selects Local or Remote operation (Refer paragraph 2.3) for remote set up
details.

12 KEYPAD Performs Chan/Freq and Special Feature Selection (Refer Table 4-3).

4-5

TABLE 4-2 OPERATORS SWITCHES, CONTROLS AND INDICATORS (Continued)

FIG

3-1

No.

13 LIQUID

SWITCHES

CONTROLS &

INDICATORS

CRYSTAL
DISPLAY

FUNCTIONAL DESCRIPTION

A 5½ digit Liquid Crystal Display (LCD) displays the FREQUENCY/
CHANNEL that the transceiver is currently operating on. In SCAN mode it
displays the current frequency scanned if RF signal is present.

14 LOUDSPEAKER An 8-ohm internal speaker reproduces the receiver audio output. The audio

line is disconnected from the internal loudspeaker when the transceiver is
operated in Tx mode or when the SPEAKER/PHONE connector is in use.

15 SPEAKER/

PHONE
CONNECTOR

A 3-pole connector provides interconnection to either an external
loudspeaker or headphone. When in use, the internal speaker is
disconnected and the VOLUME control sets the audio level applied to the
external speaker or headphone.

16 AC ON/OFF

SWITCH

17 AC POWER ON

LED INDICATOR

A single pole switch applies external AC power to the Model SPG-010 Power
Supply/Battery Charger.

A GREEN LED indicates when AC power is applied to the SPG-010 and the
AC POWER SWITCH is set to ON. It also indicates that the SPG-010 Power
Supply is functioning.

18 AC FUSE A 2.5 Amp fuse protects the SPG-010 Power Supply from internal short

circuit or transceiver short circuit.

19 EXTERNAL

DC FUSE

A 5 Amp fuse protects the 13.7 volt nominal power supply line. As part of
reverse polarity protection, the fuse will "blow" when polarity of the External
DC supply line is reversed.

20 External Battery

ON/OFF Switch

A toggle switch allows external batteries (when connected) to be switched
in or out of the circuit. Switch should be in the ON position to trickle charge
external batteries when connected. DC Battery power will be automatically
selected should AC power fail. Switch should be in OFF position if external
batteries are not connected or if transceiver is operating with batteries that
are deeply discharged or that have a defective cell.

21 *AC POWER

3 Prong AC Connector for use with AC Power Cord P/N 927002-1.

CONNECTOR

22 **REMOTE

CONNECTOR

9 Pin "D" type connector (Optional) provides signals to facilitate remote
operation. Refer to Table 1-2 for connector details.

23 *TERMINAL Blk Terminal Block with DC output and external battery, +/- connections.

24 *EXTERNAL DC

CONNECTOR

Transceiver chassis mounted connector provides for Connection to SPG­010 DC output terminal block. Mating DC connector included.

* Denotes items located on rear panel.

** Item not shown, located in side of transceiver chassis, if ordered.

4-6

4.3 FRONT PANEL KEYPAD OPERATION

All frequencies within the range of 117.975 MHz to 138.000 MHz (8.33 or 25 kHz spacing) can be
stored on channels 00 to 25. Channels and feature settings are stored in non-volatile memory.
Removal of external power source or batteries will not erase stored channels, key "Beep" set up, Keypad
and LCD display lighting set up, 90 second Tx time-out set up or Tx Inhibit selections. The SCAN and
SEARCH features are NOT stored in memory when unit is turned off. Emergency channel 121.500 is
permanently stored as an 27th Channel. Refer to paragraph 4.3.6 for details. Table 4-2 Provides a
Quick Reference of the CHANNEL/FUNCTION SELECTOR KEYPAD Functions.

TABLE 3-3 CHANNEL/FUNCTION SELECTOR KEYPAD

KEYPAD FUNCTIONAL DESCRIPTION

DIGITS 00 to 25Functions as a digits 00 - 25 for frequency entry and channel

selection Recalls Channel when preceded by "R" key.
* Stores Channel when preceded by "E" key.
* Selects Special Function when preceded by "E" key.

"R" Recalls stored channel frequency when followed by digits 00 to 25.

Recalls last frequency displayed when followed by the "E" key.

"E" * Stores a frequency to channel when followed by digits 00 to 25.

Enables Special Features (See Below).

"E","0" Recalls permanently stored emergency channel 121.500 MHz.

"E","1" Selects Automatic Lighting of Keypad and LCD Display.

"E","2" Selects Continuous Lighting of Keypad and LCD Display.

"E","3" Disables Keypad and LCD Display Lighting.

"E","4" Selects SEARCH mode.

"E","5" Selects SCAN mode.

"E","6" Enables 90 second Tx time-out protection.

"E","7" Disables 90 second Tx time-out protection.

"E","8" Toggles Key "Beeps" ON and OFF.

"E","9" Disables/Enables transmit on selected frequency.

"R","E" Toggles between currently displayed frequency and the previously displayed

frequency.

* If key "E" followed by two digits (must be digits 00-25) is pressed within 5
seconds of Keyboard entry of a valid frequency then the frequency is stored
in the channel specified. If 5 seconds has elapsed then key "E" followed by a
digit selects the Special Function specified.

4-7

4.3.1 Keypad "Beeps"

Audible "Beeps" are generated when a key is pressed (default condition). Tones can be
enabled/disabled by toggling the "E","8" keys.

Press to disable Key"Beeps".

Press to enable Key "Beeps".

4.3.2 Keypad and LCD Display Lighting

Three Display and keypad lighting modes are available to the operator. The default mode provides no
keypad or LCD display backlighting. In Continuous mode, display backlight and keypad lighting is
permanent until power is removed or until lighting mode exited. In automatic mode, display backlight
and keypad lighting is off until a key on the keypad is pressed or until the lighting
mode is exited.

Press to initiate automatic lighting.

Press to initiate continuous lighting.

Press to turn to lighting OFF.

4.3.3 Transmitter Time-out

A 90 second time-out timer is provided to prevent accidental continuous transmission.

Press to initiate 90 second Tx time-out protection.

Press to disable 90 second Tx time-out protection.

4.3.4 Selecting a Frequency

To Select a frequency press the keypad digits in the sequence indicated (Refer to Fig 4-1, Operators
Switches Controls and Indicators).

1st Digit - must be 1 for 100 MHz, all other digits are ignored.
2nd Digit - must be 1,2 or 3, all other digits are ignored.
3rd Digit - must be any digit within the range of 117 MHz to 138 MHz.

th

4

and 5th Digit - Can be any digit. 6th Digit - Can only be 0 or 5.

4-8

NOTE:

Entry of 117 MHz fills 975 in remaining digits. Entry of 138 MHz fills 000 in
remaining digits.

The transceiver is capable of 25 kHz spacing (wide band) channels as well as 8.33 kHz spacing
(narrow band) channels. The frequency entered will determine whether the channel will be wide or
narrow. For example, if you type in 118.000 you will get 118.000 MHz wide band while if you enter

118.005 then you will get 118.000 MHz in narrow band mode. For the most part, this will be
transparent to the user since a frequency will be issued in the ICAO form and the radio will determine
whether or not to be in wide or narrow mode. Refer to the chart below:

Frequency Entered (MHz) Actual Operating Frequency Channel Spacing (kHz)

118.000 118.0000 25

118.005 118.0000 8.33

118.010 118.0083 8.33

118.015 118.0166 8.33

118.025 118.0250 25

118.030 118.0250 8.33

118.035 118.0333 8.33

118.040 118.0416 8.33

118.050 118.0500 25

118.055 118.0500 8.33

118.060 118.0583 8.33

118.065 118.0666 8.33

118.075 118.0750 25

118.080 118.0750 8.33

118.085 118.0833 8.33

118.090 118.0916 8.33

118.100 118.1000 25

118.105 118.1000 8.33

etc etc etc

4-9

Example:

Press

117.975 is displayed on screen.

Press

118.000 is displayed on screen.

Press

138.000 is displayed on screen.

After keypad entry of a desired frequency, normal Tx/Rx operation can begin or the frequency can be
stored as a channel as described in paragraph 4.3.5.

4.3.5 Storing a Frequency to a Channel

Up to 26 Frequencies can be stored and recalled in channels 00 to 25 as follows:

1 . Enter the frequency to be stored as described in paragraph 3.3.4 followed immediately by

Examples:

pressing "E" and the desired Channel number "##". The channel number must always consist
of two digits ie/ channel 1 must be entered as “01", channel 0 as “00", etc.

NOTE
"E","##" must be pressed within 5 seconds of
entry or frequency will not be stored.

Press

Frequency117.975MHz is stored as channel 00.

Press

Frequency 128.100 MHz is stored as channel 01.

Press

125.000 MHz as channel 23.

4.3.6 Recalling a Stored Channel

To recall the permanently stored emergency channel 121.500 MHz press "E","0". Press "R","##".
The frequency stored as the channel indicated will be displayed on the screen.

4-10

Example:

Press

Channel 01 frequency 128.100 MHz stored in the previous example will be displayed.

4.3.7 Transmit Inhibit

To Inhibit the transmit function on a desired channel press "E","9" immediately followed by the
channel "##" to be inhibited. Subsequent pressing of "E","9","##" will enable the transmit function.

After inhibiting the transmit function, the Tx
inhibited channel must be recalled from
memory for this function to take effect.

Example:

Press

NOTE

Channel 01 frequency 119.750 MHz stored in the previous example will be
displayed.
Press the PRESS-TO-TALK switch. Observe that the TX indicator LED lights.

Press Press

Press the PRESS-TO-TALK switch. Observe that the TX indicator LED des not light.

Press Press

Press the PRESS-TO-TALK switch. Observe that the TX indicator LED lights.

4-11

4.3.8 Toggling Between Two Channels

Press to recall previous channel.

Example:

Recall Channel 01 as described in para 4.3.6

117.975 will be displayed.

Recall Channel 02

128.100 will be displayed.

Press

117.975 will be displayed.

Press

128.100 will be displayed.

3.3.9 Search Mode

In SEARCH MODE the receiver steps through each stored channel until a transmitted signal is
found. The receiver will lock on to the first signal strong enough to quiet the squelch circuit.
SE A R CH mode is exited when a signal is found. Norma l op eration resumes as i f t h e S E A R CH
frequency was selected from the keypad or recalled from memory.

Press to enter SEARCH mode.

Press to exit SEARCH mode.

3.3.10 Scan Mode

In SCAN MODE the receiver steps through each stored channel until a transmitted signal is
found. The receiver will lock on to the first signal strong enough to quiet the squelch circuit.
When a signal is found, the frequency is displayed and the audio is enabled for as long as the
squelch is held open by the RF signal. After the signal drops below the squelch threshold SCAN
is resumed until the next frequency is found and the process is repeated. SCAN mode is
continuous until the operator exits or the unit is switched off.

4-12

PTT is inhibited during SCAN mode.
Pressing PTT once exits SCAN mode.
Pressing PTT twice is required to Key
the Transmitter.

Press to enter SCAN mode.

Press PTT to Lock on SCANned Frequency or

Press to exit SCAN.

NOTE

4-13

Figure 4-3 Fixed Channel Jumper Locations

4-14

4.4 FIXED CHANNEL FREQUENCY SET UP

The following procedure fixes preselected channel frequencies and inhibits transmit on receive only
channels. After completion of this procedure the operator will be able select stored channels only for
receive or transmit. Keypad entry of frequencies is disabled.

4.4.1 System Configuration

(1) Configure channel frequencies as desired (Refer to Section 4.3.5).

(2) Select channels for Rx only (transmit inhibit) operation (Refer to paragraph 4.3.7).

4.4.2 Transceiver Disassembly/Assembly and Jumper Installation

(1) Refer to Paragraph 2.2.1 for Transceiver installation and removal procedures.

(2) Remove and retain 12 flathead screws (1) and 3 Panhead screws (2) securing

transceiver top cover (3) to chassis (4). Refer to Figure 4-3.

(3) Position Jumper J6 on pin 1 and pin 2 to disable keyboard entry of frequency selection

and lock operating configuration.

(4) Position Jumper J6 on pin 2 and pin 3 to enable keypad frequency selection and unlock

operating configuration.

(5) Position Transceiver Cover (3) on Chassis (4). Ensure that cover holes are aligned with

threaded inserts.

(6) Position 12 flathead screws (1) and 3 Panhead screws (2) through cover (3) holes into

chassis (4) threaded inserts. Tighten screws with fingers.

(7) Tighten screws securing Transceiver Cover (3) to Chassis (4).

(8) Refer to section 2 for Transceiver installation and removal procedures.

4.4.3 Operational Check

(1) Turn Unit On (Refer to paragraph 4.2).

(2) Recall Channels "00" through "25" (Refer to paragraph 4.3.6). Ensure that the frequencies

indicated for each channel displayed correspond to those selected.

(3) Transmit on each channel. Observe that the TX Led (Refer to Figure 4-2, for location) does

not light on channels selected to operate exclusively in receive mode.

(4) Enter a valid frequency (within the frequency range of (117.975 MHz to 138 MHz) that differs

from the frequency stored in channel "00".

4-15

(5) Store the frequency in channel "00" (Refer to paragraph 4.3.5).

(6) Recall Channel "00" frequency. Channel "00" frequency displayed shall be the same

frequency entered before Locking the operating configuration (ie. different from the
frequency entered in step 4).

(7) Perform Steps 4 through 6 for each channel.

4-16