Pyramid Communications VR-100 User Manual

15182 Triton Lane #102 Huntington Beach CA 92649

VR-100

Vehicular
Repeater

Revision D Aug 25 1994

VR-100

Table of Contents

Specifications ..................................................................................... 1

Introduction ........................................................................................ 2

Functional Description ....................................................................... 3

Trunking Operation ........................................................................... 4

Installation .......................................................................................... 5

Jumper Selection ................................................................................ 5

Radio Connections ............................................................................. 6

Alignment ........................................................................................... 8

RF Alignment ..................................................................................... 8

Repeater Alignment ........................................................................... 9

CTCSS Table .................................................................................... 10

Figure 1 RF Test Points ................................................................... 11

Crystals ............................................................................................. 11

Figure 2 VR-100 Parts Locator ........................................................ 12

Parts List ........................................................................................... 13

Schematic .........................................................................

Fold Out

VR-100

Specifications

General:

Operation: Motorola PAC/RT® compatible plus trunking.
Modes: Priority, non-priority disabled, test mode.
Indicators: 8 high brightness LEDs, handheld queueing tones.
Interface: 9 pin "D" connector with 6 ft. cable.
Adjustments: Receive sensitivity, transmit dev., squelch threshold,

local mic sens., lock tone decode frequency, lock
tone dev., local speaker audio.

Jumpers: COR polarity, on-air polarity, enable/disable polarity,

Tx audio flat/de-emph., Rx audio flat/pre-emph.

CTCSS: DIP switch selectable, 37 EIA tones + 69.3 & 97.4

Power Requirements:

DC supply: 13.6 VDC ±25% negative ground.
Standby: 80 mA.
Receive: 250 mA.
Transmit: 1.5 A.

Physical:

Dimensions: 5.275"W x 6"L x 1.12"H.
Weight: 18 oz.
Case: One piece extruded aluminium.

Transmitter:

Frequency Range: 450-470 MHz
RF Power: 0.25-2W adjustable
Tx Spurious: -50dbc
Stability: 5ppm
FM Noise: -55db
Audio dist: <5%
Tx sens: 50mV-2.5V RMS
Lock Tone: Jumper selectable: 832.5 or 847.5Hz
FCC TA: LRUVR-100U Parts 22, 90

Receiver:

Frequency Range: 450-470 MHz
Sensitivity: .4μV for 12db Sinad
Mod Acceptance: ±7.5kHz
Selectivity: 70db
Spurious/image rej.: 60db
IMD response: 65db
Stability: 5ppm
Lock Tone detect: Tunable: 820 Hz to 930 Hz, 1% bandwidth
Local Rx Audio: 400mW into 8 Ohms

Specifications Subject to Change without notification

Page 1

VR-100

Introduction

The Pyramid Communications model VR-100 is a microprocessor
controlled low power vehicular repeater. It is designed to interface
between a high power mobile radio and a low power UHF handheld. If
the radio operator is out of the vehicle and the mobile radio is receiving
a transmission, the VR-100 will repeat the signal to the users handheld.
The user may also transmit back to the VR-100 via the handheld, and their
transmission will be repeated back to the base by the high power mobile
radio, effectively extending the range of the low power handheld.
On-board logic control by the microprocessor ensures that only one
vehicle will become active as the repeater, should several vehicles arrive
at the same scene. The logic also handles cases where the priority vehicle
leaves the scene (or fails), or another priority vehicle arrives from a
different site.

The model VR-100 is fully compatible with Motorola PAC/RT®
systems, as well as GE Ericsson and Standard EX-10/ CTS-20 radios.
Additionally, the VR-100 supports connection to LTR® or Motorola
trunking radios, local mic audio repeat (local PTT from the mobile is
repeated to the HT's), and local speaker audio for HT-Base transmissions.

Designed to interface to a wide variety of mobile radios, the VR-100
has input and output adjustments for Rx audio sensitivity, mobile Tx
deviation, COR polarity and threshold, local mic sensitivity, local speaker
audio, on-air detect polarity, enable/disable polarity and audio response
selections for flat or 6db/octave for both Tx and Rx audio paths. There
are also jumper selections for lock tone frequency, priority sample rate,
conventional/trunking operation and a built in test mode.

The eight LED front panel status indicators confirm proper CPU
operation, priority status, and mobile/repeater COR and PTT status.

Page 2

VR-100

Functional Description

The VR-100 operates on UHF simplex frequencies; the handhelds
transmit CTCSS but are carrier squelch receive. The VR-100 has CTCSS
on receive only. The repeater should be connected to a VHF high band
or low band mobile for best operation. Connection to a UHF mobile is
possible, provided there is enough separation in the mobile transmit and
the VR-100 receive frequencies. Also, antennas for the VR-100 and the
mobile radio should be located as far apart as practical, and with vertical
separation if possible. Additionally, bandpass filters and notch cavities
may be used to reduce interference between the mobile and VR-100.

When the user leaves the vehicle, they activate the VR-100 via their
mobile radio front panel or a separate switch. When the mobile radio is
receiving carrier and proper tone, the VR-100 will begin transmitting on
the handheld's receive frequency. The user is able to hear and respond to
all radio traffic, including other handhelds at the site. The VR-100 will
cease transmission periodically to check for handheld activity. If the VR­100 detects proper carrier and tone from a handheld, it will key the mobile
radio and repeat the users transmission. In this way, the handheld is given
priority and may respond during repeater hang time. The VR-100 has a
3 minute time-out timer in the base to handheld direction. If the base
transmits to the mobile for more than 3 minutes, the VR-100 will send an
error tone to the handheld, unkey the repeater and remain idle until the
base ceases transmissions.

When the VR-100 is first activated, it will transmit a short "lock tone"
that alerts the user that the system is functioning. It will then assume the
priority status and be ready to repeat any base to handheld or handheld to
base transmissions. If another unit arrives at the same site and is
activated, it too will transmit the "lock tone"; when the first VR-100
detects the lock tone from the second unit, it will increment it's priority
counter and will no longer repeat any transmissions. This process will
continue for each unit that arrives at the scene, creating a priority
hierarchy for up to 256 vehicles.

Even though the other VR-100's are not at priority status, they will
continue to monitor the channel for activity. If the priority unit were to
leave the scene or become disabled, the other units will detect the
condition to repeat and determine that there is no priority unit repeating
the transmission. They will then begin decrementing their priority
counters until one of them reaches the priority status and begins repeating

Page 3

VR-100

the transmission. Since the VR-100's are all at different priority counts,
only one will reach priority status and begin transmitting. The other units
will sense the priority repeater and cease decrementing their counters,
preserving the priority hierarchy.

If another unit were to arrive from a different scene and it is still
the active priority, there will be two active repeaters on the air when a
condition to repeat exists. When one of the VR-100's unkeys to check
for handheld activity, it will detect the presence of the other active
VR-100 and increment it's priority counter and cease transmission.
This is the self clearing mode to prevent radio "collisions".

If the user were to key the mobile radio locally and his VR-100 is
the priority, the VR-100 will detect the local mic PTT and repeat the
transmission to the other handhelds at the site so that they would not
miss half of the transmission.

If the users wish to communicate HT-HT without accessing the
mobile repeater, they may transmit on the same frequency without

CTCSS encode. The repeater will only respond to carrier and tone from

the handhelds.

Trunking Operation

When the model VR-100 is connected to a trunking radio and the
user wishes to access the system from the handheld, they key their
handheld briefly then release. The VR-100 will key the mobile radio
for 200mS, during which time it monitors the mobile's transmitter for
an on-air condition. If it does not see the radio transmit at all (system
is busy), it will retry every 5 seconds until successful or time out (30
Sec). It will also send a "busy" tone to the handheld every 5 seconds to
indicate the progress of the call attempt. If unsuccessful after 30
seconds, the VR-100 will transmit an error tone to alert the user that the
call attempt failed.

When the VR-100 detects that the mobile is transmitting, it will
continue to monitor the on-air line until the transmitter remains
keyed for at least 250 mS to ensure that the radio is not merely
handshaking or retrying. After successful acquisition of a voice
channel, it will continue to hold the mobile PTT active for 2 seconds
and transmit a go-ahead blip to the handheld user. The user then
keys their handheld to speak on the voice channel. If the user does
not key up within the 2 second period, the VR-100 will unkey the
mobile and send the error tone as before.

Page 4

VR-100

Installation

Before installing the VR-100, ensure that the RF and repeater
sections are properly aligned per the tuning procedure beginning on page
8 of this manual. Additionally, ensure that the VR-100 jumpers are
properly configured for use with the particular mobile radio that it will be
connected to:

JP1 Controls the polarity of the remote enable/disable feature of the

VR-100. If the remote enable line (pin 3 of P1) goes low to
activate the repeater, set JP1 to the (-) position. If pin 3 goes high,
set JP1 to the (+) position. If pin 3 is not used and you wish to
have the repeater active at all times set JP1 to the (-) position and
ground pin 3.

JP2 Controls the polarity of the mobile COR line. Before setting this

jumper, COR threshold adjustment (RV5) should be made as
described in the alignment section of this manual on page 9. If
the mobile COR line goes more positive in the presence of
carrier, set JP2 to the (+) position or to the (-) position if the line
goes more negative during carrier.

JP3 Controls the polarity of the on-air detect line (pin 9 of P1). This

line is only used in trunking applications. If the transmitter

sense line goes more positive during transmit, set JP3 to the (+)

position, otherwise set JP3 to the (-) position. If using a trunking

radio, ensure that JP6 is also shorted.

JP4 Controls the audio response of the mobile transmit signal. If

pin 2 of P1 is connected to the mobile transmitter audio path

before pre-emphasis, JP4 should be set to de-emph. in order to

correct for the pre-emphasized audio coming from the handheld.

If pin 2 is connected after pre-emphasis, set JP4 to flat.

JP5 Controls the VR-100 lock tone encode frequency. If JP5 is open

(default) the lock tone frequency is 832.5 Hz. If JP5 is shorted,
the lock tone frequency is 847.5.

JP6 If the VR-100 is connected to a conventional radio, leave JP6

open. If connected to a trunking radio, short JP6. If JP6 is
shorted, ensure that pin 9 of P1 is connected to a point in the radio
that indicates the radio is transmitting and ensure that JP3 is
configured properly.

Page 5

VR-100

JP7 During base to handheld transmissions, the VR-100 will

periodically unkey the repeater to check for handheld activity.

JP7 enables the priority sampling. If open, the VR-100 will not

priority sample. If JP7 is shorted, the VR-100 will sample at 1
second intervals.

JP8 Used only for testing and alignment of the VR-100. If shorted,

the VR-100 transmitter is active and the lock tone is sent
continuously. For normal operation, ensure that JP8 is open.

JP9 Controls the audio response of the repeater transmit signal. If

pin 6 of P1 is connected to the mobile's discriminator or a point

in the receiver before de-emphasis, JP9 should be set to flat. If
pin 6 is connected after de-emphasis, set JP9 to pre-emph. in

order to correct the audio for the handheld receiver.

Make the connections between the mobile radio and the VR-100
cable as follows:

Pin 1: Ground. Connect the the radio's chassis or ground plane.

(Black/Shield)

Pin 2: Mobile transmit audio. Connect to the mobile transmit audio

(White)

path or tone input. If connected before pre-emphasis, ensure that
JP4 is set to de-emph. If connected after pre-emphasis, set JP4
to flat.

Pin 3: Remote enable/disable. Connect to the radios auxiliary output

(Blue)

or a separate switch to remotely enable or disable the repeater.
If this line goes high to activate the repeater, ensure that JP1 is
set to the (+) position. If this line goes to ground, set JP1 to the
(-) position. If not used ground pin 3 and set JP1 to the (-)
position; the repeater will be active any time there is 12 VDC at
pin 5.

Note: This line does not have a pull up resistor; if connected to

an open collector or dry contact output, add a 10K resistor
between pin 3 and pin 5 of P1 on the VR-100 main PCB.

Pin 4: Mobile PTT output. Connect to mic PTT on the mobile radio,

(Green)

or a line that goes active low to transmit. This line is also used
to sense local mic PTT in order to repeat the local mic audio to
the handhelds.

Note: To disable local mic repeat, remove D4.

Pin 5: 12 VDC input. Connect to the radio's switched 12V supply.

(Red)

Page 6

VR-100

Pin 6: Mobile receiver audio. Connect this line to the mobile receive

(Yellow)

audio path before the volume control. If pin 6 is connected before
de-emphasis ensure that JP9 is set to flat. If pin 6 is connected
after de-emphasis, set JP9 to pre-emph.

Pin 7: Mobile COR detect. This line is used to indicate when the

(Violet)

VR-100 should repeat the transmission to the handheld. Connect
to a logic point in the mobile that indicates proper tone and
carrier have been detected or the audio unmute line. If this line
goes more positive during an unmute condition, set JP2 to the (+)
position. If pin 7 goes more negative during unmute, set JP2 to
the (-) position. RV5 should also be set for the midway voltage
between mute and unmute. Example: If connected to a logic line
that goes between 0 and 5 VDC, set RV5 (pin 12 of U3) for 2.5
V. If pin 7 goes between 5.6 and 7.2 VDC, set RV5 for 6.4 VDC.

Pin 8: Local mic audio. When the user keys the mobile radio and the

VR-100 connected to it is the priority unit, the local mic audio

(Brown)

can be repeated to the handhelds. Connect this line to a point in
the mobile transmitter audio path after pre-emphasis but before
limiting or filtering. RV6 sets the sensitivity level.

Note: To disable local mic repeat, remove D4.

Pin 9: On-air detect. Used only in trunking applications to indicate

when the mobile transmitter is actually on the air. This is not the

(Grey)

same as mobile PTT. Connect radio PTT on the logic board or
to switched transmitter B+. If pin 9 goes positive during
transmit, set JP3 to the (+) position. If pin 9 goes to ground
during transmit, set JP3 to the (-) position.

Install the VR-100 in the vehicle using the supplied mounting
bracket and hardware. The bracket is secured to the housing using four

8-32 x ¼" machine screws. Do not use screws longer than ¼" for

mounting the VR-100 to the bracket or circuit damage may result.

Page 7

VR-100

Alignment

In order to properly align the VR-100, you will need two service
monitors and the mobile radio that the repeater will be installed with.
Refer to figures 1 and 2 for alignment points.

Dis-assemble the repeater by removing the two allen-head screws on
the rear panel, the phillips screw on the bottom and sliding the main
circuit board out of the housing with the rear panel attached. Connect one
service monitor to the VR-100 BNC jack and the other to the mobile
antenna jack; connect the cable from the mobile radio to the VR-100.
Turn on the mobile and active the VR-100. Adjust the squelch control on

the RF board (R115) so that the repeater COR LED on the front panel is

off.

RF Alignment

Important: The case of the VR-100 is integral to the heat sink for the RF

module and voltage regulators. Do not transmit at full power for extended
periods of time with the PCB removed from the case or damage may result!

1. Short jumper JP8 on the VR-100 main PCB. With a DC voltmeter

at TP01 on the RF board, adjust L203 and L204 for a maximum

reading.

2. Move the voltmeter to TP02 on the RF board; adjust L203, L204,

L205 and L206 for a maximum reading.

3. Move the voltmeter to TP03 on the RF board; adjust L205, L206,

L207 and L208 for a maximum reading.

4. Move the voltmeter to TP04 on the RF board; adjust R232 to midway.

Adjust C244 and C247 for a minimum reading at TP04. Adjust R232

for 2 Watts. Adjust C205 for the transmit frequency ±100 Hz.

Remove the short from JP8 on the VR-100 main PCB.

5. Set the service monitor connected to the VR-100 to generate the

repeater receive frequency with a 1kHz tone at ±3kHz deviation.

Connect a Sinadder to TP 1 on the VR-100 main PCB. Adjust the

signal generator output level for a reading of 12db Sinad.

6. Adjust L112, L113, C147, C151, L101, C104 and L104 in that order

for a maximum Sinad reading at TP 1. Re-adjust the signal generator

output level as necessary to maintain a usable reading.

7. Adjust C136 on the RF board for a maximum Sinad reading.

Page 8

VR-100

Repeater Alignment

1. Set the mobile service monitor to generate mode and RF output for

1mV with a 1 kHz tone at ±3kHz deviation on the mobile receive

frequency. Set the VR-100 service monitor to the transmit monitor

mode.

Mobile COR Threshold: With a positive voltmeter probe at pin

2.

13 of U3 (VR-100), measure and record the voltage when the mobile

signal generator is both on and off. Move the voltmeter probe to pin

12 of U3 and adjust RV5 for the midway point of the 2 measurements

taken at pin 13. Set JP2 to the (+) position if the voltage at pin 13 went

more positive when the signal generator was on, otherwise, set JP2

to the (-) position.

3.

Repeater modulation limiting: Open JP7. Set RV1 on the

VR-100 main PCB fully clockwise. Turn the mobile signal generator

on and confirm that the VR-100 is keyed and the mobile COR and

Rptr PTT LEDs are on. Adjust R205 on the RF board for ±4.5kHz as

read on the service monitor connected to the VR-100. Adjust RV1

on the VR-100 main circuit board for ±3kHz deviation. Confirm that

when the mobile signal generator deviation is reduced to ±2kHz and

±1kHz, the VR-100 deviation tracks with it. Increase the mobile

signal generator deviation to ±5kHz and confirm that the VR-100

deviation does not exceed ±4.5kHz. Set JP7 per the installation

section, page 6.

4. Lock Tone Deviation: Turn off the mobile signal generator and

short JP8 on the VR-100 main circuit board. Adjust RV3 for ±3kHz

deviation as read on the service monitor connected to the VR-100.

Remove the short from jumper JP8.

5. Local Mic Repeat Level: Set the service monitor connected to the

mobile to the monitor mode; key the mobile radio, inject a 1kHz tone

into the mic audio circuit and adjust the audio level to produce ±3kHz

deviation. Confirm that the VR-100 is also transmitting and adjust

RV6 on the main PCB for ±3kHz deviation as read on the service

monitor connected to the VR-100. Unkey the mobile radio.

6. Receive Audio Level: Set the service monitor connected to the

VR-100 to the generate mode and inject an RF signal at 1mV with a

1kHz tone at ±3kHz deviation. Connect a scope probe to TP1 on the

main PCB. Adjust R122 on the RF PCB for 1VPP as read at TP1.

Page 9

VR-100

7. Lock tone decode frequency: Move the scope probe to TP2 and

change the service monitor modulation frequency to 832.5 Hz.

Adjust RV4 for a maximum reading at TP2. Confirm that the PRI

LED is off on the front panel. Return the modulation frequency to

1kHz.

8. Mobile transmit audio level: Set the 6 position DIP switch for the

system CTCSS frequency as determined in table 1. Turn on the

service monitor CTCSS modulation at ±750 Hz deviation. Confirm

that the Rptr CTCSS and Mobile PTT LEDs are on, and the mobile

is keyed. Adjust RV2 on the VR-100 main PCB for ±3kHz deviation

as read on the service monitor connected to the mobile.

9.

Repeater Squelch level: Turn off the CTCSS deviation and reduce

the signal output to .25uV. Adjust R115 on the RF board so that the

Rptr COR LED is just off. Confirm that the LED comes on when the

signal generator level is increased to .4uV.

10. Local speaker level: Increase the signal generator output level to

1mV. Connect an 8 Ohm speaker to J1 of the VR-100 and adjust RV7

on the main PCB for the desired receive audio level.

Tone 123456

67.0 000000

69.3 000110

71.9 100000

74.4 000001

77.0 110000

79.7 000010

82.5 100001

85.4 000011

88.5 110001

91.5 000100

94.8 100010

97.4 000101

100.0 110010

103.5 100011

107.2 110011

110.9 100100

114.8 110100

118.8 100101

123.0 110101

127.3 100110

Note: '0' means off

Table 1

Tone 123456

131.8 110110

136.5 100111

141.3 110111

146.2 101000

151.4 111000

156.7 101001

162.2 111001

167.9 101010

173.8 111010

179.9 101011

186.2 111011

192.8 101100

203.5 111100

210.7 101101

218.1 111101

225.7 101110

233.6 111110

241.8 101111

250.3 111111
No Tone 001111

Page 10

VR-100

Figure 1

RF Test Points

Crystals

The model VR-100 uses a Standard Communications Corp. CU33
telemetry module for the RF section. Crystals are available from:

Frequency Management Co.
15302 Bolsa Chica Street
Huntington Beach CA 90649
[phone]

The crystal frequencies can be determined from the following
equations:

XtalRX=(FR-21.4)/9 XtalTX=FT/36

Page 11

Figure 2

VR-100 Main Board

Page 12

VR-100

Parts List

Reference Description Part #

C1,C32,C34 .068μfd Polyester Cap 1040-683
C2,C21 1μfd 16V Electrolytic Cap 1032-105
C3-C6, C33 100ufd 16V Electrolytic Cap 1032-107
C7 10μfd 16V Electrolytic Cap 1032-106
C8-C13,C22,C26-C31, C35,C37,C38 . 1μfd Polyester Cap 1040-104
C14 2.2μfd Tantalum Cap 1031-225
C15,C16 33pfd Ceramic Cap 1010-330
C17,C23,C24 .0068μfd Polyester Cap 1040-682
C18 .001μfd Polyester Cap 1040-102
C19,C36 .0033μfd Polyester Cap 1040-332
C20 .0022μfd Polyester Cap 1040-222
C25 4.7μfd 16V Electrolytic Cap 1032-475
D1,D4,D5,D6 1N914 Pin diode 5001-001
D2,D3 Right angle LED x4 6001-401
F1 3A Pica fuse 7300-030
JP1-JP4, JP9 .100" Vertical Header 7220-103
J1 3.5mm Speaker Jack 7210-350
P1 DB-9 M Right Angle PCB 7400-011
P2 14 pin dip socket 7401-014
Q1, Q3-Q10 2N4401 NPN TO92 3104-401
Q2 TIP32 PNP TO220 3200-032
RV1-RV3,RV5-RV7 10K Right Angle Pot 2101-103
RV4 50K 10 Turn Pot 2110-503
R1,R4,R40 100K 1/8 Watt Carbon Film 2008-104
R2,R3 560K 1/8 Watt Carbon Film 2008-564

R10,R17,R21,R23,R24,R34,R46,R59,R60 5.6K 1/8 Watt Carbon Film 2008-562

R7,R8,R16,R18-R20,R57,R58 22K 1/8 Watt Carbon Film 2008-223
R36,R37,R38,R41 27K 1/8 Watt Carbon Film 2008-273
R6,R44 33K 1/8 Watt Carbon Film 2008-333
R9 220 1/8 Watt Carbon Film 2008-102
R11,R12,R56 4.7K 1/8 Watt Carbon Film 2008-472
R5,R13,R28,R29,R39 2.2K 1/8 Watt Carbon Film 2008-222
R14,R15,R42,R43,R45 10K 1/8 Watt Carbon Film 2008-103
R22,R27,R35 1.0M 1/8 Watt Carbon Film 2008-105
R25,R26,R61 470K 1/8 Watt Carbon Film 2008-474
R30-R33 18K 1/8 Watt Carbon Film 2008-183
S1 6 Position DIP Switch 7410-006
U1,U2,U3 MC 3403 Quad Op-Amp 4003-403
U4 8749H Microprocessor 4008-749
U5 MX-365 CTCSS Processor 4000-365
U6 4066 Quad analog switch 4004-066
U7 5V 1A Regulator 4007-805
U8 9V 2A Regulator 4017-809
U9 LM 386 400mW Audio Amp 4000-386
U10 DS 1233 Reset Controller 4001-233
VAR1 18V MOV 4900-018
X1 1.0 MHz xtal HC49U 8001-000

Extruded Aluminium case 7201-001
Aluminium Endplate 7201-010
Acrylic Front panel 7201-011
BNC Chassis Mt. Connector 7400-010
Ribbon Cable with 14 Pin IDC Conns. 7301-002
6 Ft. Radio Cable with DB-9 F Conn. 7301-001
Shorting Blocks for JP1-JP4, JP9 7400-009

Page 13

4

4

3

3

2

2

1

1

D D

C C

B B

A A

VCC

VCC

VCC

VCC

9VDCVCC

VCC

VCC

9VDC

9VDC

9VDC

12VDC

VCC VDD VSS VEE GND

VCC

Bias

Bias

Bias

Bias

Bias

Bias

9VDC

VCC

VCC

Bias

Bias

12VDC

Size

Scale

CAGE Code

DWG NO

Rev

Sheet

of

B

Pyramid Communications

Monday, January 07, 2008

11

C

VR-100 Vehicular Repeater

Size

Scale

CAGE Code

DWG NO

Rev

Sheet

of

B

Pyramid Communications

Monday, January 07, 2008

11

C

VR-100 Vehicular Repeater

Size

Scale

CAGE Code

DWG NO

Rev

Sheet

of

B

Pyramid Communications

Monday, January 07, 2008

11

C

VR-100 Vehicular Repeater

Power

Priority

Rpt Cor

Rpt CTCSS

Rpt PTT

MCOR

MPTT

Spare

Lock
Tone
Dev

Lock Tone
Trunking

CW

CW

cwcw

Flat

De-Emp

Opt
Test Mode

Pre-Emp

Flat

cw

cw

Pica
Fuse

R47-R54
330 Ohm

cw

[-]

[+]

[-]

[+]

[-]

[+]

JP5
JP6
JP7
JP8

LTone Dec

R6

33KR633K

R351MR35
1M

Q1

2N4401Q12N4401

R5

2k2R52k2

U1D
MC3403

U1D
MC3403

12

13

14

R14 10KR14 10K

R23

5k6

R23

5k6

Q2

TIP117Q2TIP117

R15
10K

R15
10K

R13

2k2

R13

2k2

R8

22KR822K

C33
100U

C33
100U

R9

820R9820

U2C
MC3403

U2C
MC3403

10

9

8

RV5

COR Thresh

RV5

COR Thresh

U3A
MC3403

U3A
MC3403

3

2

1

Q6
2N4401Q62N4401

JP2JP2

1

2

3

R21
5k6

R21
5k6

+

-

U9
LM386

+

-

U9
LM386

2
3

5

6

1

4

8

7

C211UC21
1U

R20 22KR20 22K

RV7

Local Spkr

RV7

Local Spkr

Q5
2N4401Q52N4401

R61

470K

R61

470K

Q7
2N4401Q72N4401

C31 .1uC31 .1u

U2D
MC3403

U2D
MC3403

12

13

14

C6
100UC6100U

R17
5k6

R17
5k6

C32

.068u

C32

.068u

R18 22KR18 22K

R16

22K

R16

22K

C34
.068u

C34
.068u

RV3
LTone Dev

RV3
LTone Dev

Q8
2N4401Q82N4401

R55

8R_1W

R55

8R_1W

X1

1.0 MHzX11.0 MHz

D4

1N914D41N914

U6A
4066

U6A
4066

1 2

13

R56 4k7R56 4k7

U2B

MC3403

U2B

MC3403

5
6

7

RV6

Local Mic

RV6

Local Mic

C15
33p

C15
33p

JP4JP4

1

2

3

P2P2

1

2

3

4

5

6

7

14

13

12

11

10

9

8

U1A
MC3403

U1A
MC3403

3

2

1

C12
.1u

C12
.1u

+

-

U3D

MC_3403

+

-

U3D

MC_3403

12
13

14

411

R1
100KR1100K

R271MR27

1M

U4
8749U48749

X1

2

X2

3

RESET

4

SS

5

T0

1

T1

39

INT

6

P1.0

27

P1.1

28

P1.2

29

P1.3

30

P1.4

31

P1.5

32

P1.6

33

P1.7

34

EA

7

PROG

25

DB.0

12

DB.1

13

DB.2

14

DB.3

15

DB.4

16

DB.5

17

DB.6

18

DB.7

19

P2.0

21

P2.1

22

P2.2

23

P2.3

24

P2.4

35

P2.5

36

P2.6

37

P2.7

38

RD

8

WR

10

PSEN

9

ALE

11

R2

560KR2560K

R221MR22

1M

U2A
MC3403

U2A
MC3403

3

2

1

RV1

Rptr Dev

RV1

Rptr Dev

R19

22K

R19

22K

C16 33pC16 33p

C7

10UC710U

D6
1N914D61N914

R3

560KR3560K

R32

18K

R32

18K

R33

18K

R33

18K

R31

18K

R31

18K

R4 100KR4 100K

R30

18K

R30

18K

C1

.068uC1.068u

C19 3n3C19 3n3

RV2

Mob Dev

RV2

Mob Dev

S1S1

12345

6

12111098

7

C17 6n8C17 6n8

U6D
4066

U6D
4066

1110

12

C181nC18
1n

C10

.1u

C10

.1u

C27 .1uC27 .1u

C20
2n2

C20
2n2

JP3JP3

1

2

3

U3B

MC3403

U3B
MC3403

5
6

7

R26
470K

R26
470K

C5
100UC5100U

R25 470KR25 470K

U10

DS1233

U10

DS1233

I2O

1

3

R57

22K

R57

22K

D1
1N914D11N914

JP9JP9

1

2

3

C11

.1u

C11

.1u

C26

.1u

C26

.1u

R60

5k6

R60

5k6

C36

3n3

C36

3n3

R59
5k6

R59
5k6

C35

.1u

C35

.1u

R58
22K

R58
22K

Q4
2N4401Q42N4401

C28

.1u

C28

.1u

U1C
MC3403

U1C
MC3403

10

9

8

Q3 2N4401Q3 2N4401

C29C29

C37
.1u

C37
.1u

JP1JP1

1

2

3

C30C30

C38 .1uC38 .1u

Q10
2N4401

Q10
2N4401

R46

5k6

R46

5k6

R7

22KR722K

VAR1
18V

VAR1
18V

C4

100UC4100U

J1
3mm_JackJ13mm_Jack

P1

DB9_MP1DB9_M

5
9
4
8
3
7
2
6
1

U5

MX_365U5MX_365

VCC

1

XI

2

XO

3

LE

4

D5

5

D4

6

D3

7

D2

8

D1

9

D010VSS11REF12DEC13COMP14RX

15

TONE

16

R/T

17

PTL

18

RXO

19

TXO

20

VB

21

TXI

22

RXI

23

IN

24

R11
4k7

R11
4k7

U1B

MC3403

U1B

MC3403

5

6

7

C8
.1uC8.1u

U7
LM7805U7LM7805

IN15V

3

R24
5k6

R24
5k6

C13

.1u

C13

.1u

C25
4U7

C25
4U7

C9

.1uC9.1u

TP1TP1

TP2TP2

R12 4k7R12 4k7

R28
2k2

R28
2k2

R41

27K

R41

27K

R29

2k2

R29

2k2

R39

2k2

R39

2k2

R34

5k6

R34

5k6

Q9

2N4401Q92N4401

R37

27K

R37

27K

U6C
4066

U6C
4066

8 9

6

R38

27K

R38

27K

F13AF1
3A

U6B
4066

U6B
4066

43

5

R40 100KR40 100K

Rv4

50K 10Turn

Rv4

50K 10Turn

R42

10K

R42

10K

R43
10K

R43
10K

R44 33KR44 33K

R36 27KR36 27K

U3C
MC3403

U3C
MC3403

10
9

8

C3

100UC3100U

U8
LM7809U8LM7809

IN19V

3

R45

10K

R45

10K

R10
5k6

R10
5k6

D5

1N914D51N914

C22

.1u

C22

.1u

C21UC2

1U

C14
2U2

C14
2U2

C23

6n8

C23

6n8

C24

6n8

C24

6n8