RELM RP3000 User manual

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Content
General………………………………………………………………………..……………………2
Brief Introduction…………………………………………………………………………………3
Radio Feature Description………………………………………………………………………5
Radio Modes………………………………………………………………………………………6
Circuit Description………………………………………………………………………………7
CPU Pins…………………………………………………………………………………………13
Adjustment Description………………………………………………………………………16
RPU3000 Part List 1 (Control Board) ……………………………………………………24
RPU3000 Part List 1 (RF Board) …………………………………………………………32
RPV3000 Part List 1 (Control Board) ……………………………………………………46
RPV3000 Part List 1 (RF Board) …………………………………………………………54
Disassembly and Assembly for Repair………………………………………………………66
Exploded View……………………………………………………………………………………70
RP3000 Part List 2………………………………………………………………………………71
Packing……………………………………………………………………………………………72
RPU3000 PC Board View (Control Board) ……………………………………………73
RPU3000 PC Board View (RF Board) …………………………………………………75
RPV3000 PC Board View (Control Board) ………………………………………………77
RPV3000 PC Board View (RF Board) ……………………………………………………80
RP3000 Block Diagram…………………………………………………………………………81
RPU3000 Schematic Diagram……………………………………………………………82
RPV3000 Schematic Diagram……………………………………………………………90
Specifications……………………………………………………………………………………98

RP3000 General
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General
Manual Scope
This manual is intended for use by experienced technicians familiar with similar types of communication
equipment. It contains all service information required for the equipment and is current as of the
publication date.
User Safety Information
The following precautions are recommended for personnel safety:
zDO NOT transmit until all RF connectors are verified secure and any open connectors are properly
terminated.
zSHUT OFF and do not operate this equipment near electrical blasting caps or in an explosive
atmosphere.
zWhen in vehicles with an airbag, do not place a portable radio in the area over an airbag or in the
airbag deployment area.
zDo not expose the radio to direct sunlight for a long time nor place it close to a heating source.
zDo not use any portable radio with a damaged antenna. If a damaged antenna comes into contact
with your skin, a minor burn may result.
zWhen transmitting with a portable radio, hold the radio in a vertical position with its microphone
about 5 centimeters away from your mouth.
zIf you wear a portable radio on your body, be sure to keep the antenna at least 2.5 centimeters away
from your head or body when transmitting.
zThis equipment should be serviced by a qualified technician only.

RP3000 Brief Introduction
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Brief Introduction
(1) Antenna
Used to transmit/receive signals.
(2) LED
Following table indicates LED indication and corresponding radio status.
LED Status
No display Standby
Glow green Receive
Glow red Transmit
Flashing green Scan
Flashing red Low battery voltage
Flashing orange Call waiting
(3) Channel Selector
Used to select wanted channel.
(4) Programmable key [A]
(5) Power/Volume Control Knob
Rotate the Power/Volume Knob clockwise until a “click” is heard to turn the radio on, fully counter
clockwise to turn the radio off. When the radio is on, turn the knob to adjust volume.
(6) Battery Latch
Used to fasten the battery.
(7) Speaker
Used to output sounds.

RP3000 Brief Introduction
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(8) Microphone
Used to input sounds.
(9) External Jack
Used to connect with external earphone or programming cable.
(10) Belt Clip
Used to clip the radio on your belt.
(11) Battery Pack
(12) PTT key
Hold down PTT, radio operates in transmit mode. Release PTT, radio returns to receive mode.
(13) Programmable Key [B]
(14) Programmable Key [C]
The following table shows the key function when short pressed, long pressed and held down:
Key function
Key Function Short Press Long Press Hold Down
Emergency Siren Enable emergency siren Disable emergency siren －
Monitor －－Monitor
Scan Enable/Disable scan Enable/Disable scan －
Nuisance Delete Delete nuisance channel
in scan
Delete nuisance channel in
scan －
Select High/Low
Power Select High/Low Power Select High/Low Power －
Repeater/Talk Around Select Repeater or Talk
Around Mode
Select Repeater or Talk
Around Mode －
Repeater/Reverse
Frequency
Select Repeater or
Reverse Frequency Mode
Select Repeater or
Reverse Frequency Mode －
Call Transmit a Call Transmit a Call －
Selective Call Transmit Selective Call Transmit Selective Call －
Group Call Transmit Group Call Transmit Group Call －
Vibration Toggle Vibration On/Off Toggle Vibration On/Off －
Note: You can program emergency siren feature to [A] key only. Once [A] key is programmed as
emergency siren key, you can’t program it with other features. Monitor feature can be programmed to [B]
or [C] key only. After programmed as monitor key, [B]/[C] key can’t be programmed with other features.

RP3000 Radio Feature Description
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Radio Feature Description
1. CTCSS/CDCSS/2-Tone/5-Tone
2. Channel Spacing 25KHz/12.5KHz (Wide/Narrow)
3. Programmable key
4. Squelch Tail Elimination
5. Priority Channel Scan/Nuisance Delete
6. Busy Channel Lockout
7. High/Low Power
8. Emergency Siren
9. Repeater/Talk Around
10. Call
11. TOT
12. VOX
13. Battery Save
14. Low Battery Alert
15. Voice Compander
16. Software Upgrade
17. Wired Clone
18. PC Programming
19. Vibration

RP3000 Radio Modes
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Radio Modes
Frame of Radio Modes
Entry for Mode Startup
User Mode
Turn the power on to enter User Mode. This mode is for normal operation.
Clone Mode
1) Turn the power on while holding down [PTT] key and programmable key [B] simultaneously. After
two seconds, a BEEP sounds and LED glows orange indicating that the radio enters clone mode.
2) In clone mode, press programmable key [B] to begin wired clone. Then press [PTT] key, MCU
transmits data directly through UART port. During cloning, LED of source radio flashes red and
that of target radio flashes green. A BEEP sounds when cloning is complete.
3) Press programmable key C to enter wireless clone mode. Press and hold PTT key, the radio
transmits data on the default frequency. To receive the data, the target radio should enter wireless
clone mode. User mode is reset when cloning is completed.
Power On
User Mode
Clone Mode
Program Download
Adjustment Mode
All Reset Mode

RP3000 Radio Modes
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Program Download
1) Connect the radio with the PC through download cable, after two seconds, the radio enters
download mode. LED glows orange.
2) You can update software and provide second development feature for the user via PC update
program. LED flashes orange during program download.
All Reset Mode
Turn on the power while holding down PTT and programmable key A simultaneously (or short circuit the
two SELF points) to enter all reset mode. The EEPROM data is all reset. A BEEP sounds and LED
glows orange when All Reset is complete.
Adjustment Mode
Turn the power on while holding down PTT and programmable key C, after two seconds, the radio
enters adjustment mode. LED glows orange. Rotate channel selector knob to select corresponding test
item. Hold down PTT key to switch between wideband and narrowband. Briefly press PTT to transmit or
switch among center, low and high frequency. Briefly press A key to save data. Press B key to adjust
upwards and C downwards.
CH1-CH16 are defined as following:
CH1:TransmittingVCO; CH2:ReceivingVCO;
CH3: CTCSS balance; CH4: Frequency Accuracy;
CH5:Highpower; CH6:Lowpower;
CH7: CDCSS balance; CH8: MIC sensitivity;
CH9: Maximum frequency deviation; CH10: CTCSS deviation;
CH11: CDCSS deviation; CH12: TONE deviation;
CH13: Receiving sensitivity; CH14: Squelch level;
CH15: Low battery alert level; CH16: VOX sensitivity.

RP3000 Circuit Description
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Circuit Description
1. Power Supply
Power supply of the radio is derived from the battery, which supplies battery B+ after passing
through fuse 3A and then feeds through power switch. The power supplies voltage for three AVRs.
IC505 supplies 5V (5M) voltage for the control circuit. IC9 supplies 5V (5C) voltage for the shared
circuit. And IC6 supplies voltage for the transmit/receive circuit. In transmit mode, 5TC becomes low
voltage and Q3 is turned on to supply 5V(5T) voltage for the transmit circuit. In receive mode, 5RC
becomes low voltage and Q2 is turned on to supply 5V (5R) voltage for the receive circuit.
BATT FUSE
PROTECT
5C
5M
BUFF
1/2BIAS
AVR
AVR
SW
5R
5T
AVR
SW
SW
SAVE
5RC
5TC
Fig. 1 Power Supply Block Diagram
2. PLL Frequency Synthesizer
PLL circuit generates the first local oscillator signal for reception and RF signal for
transmission.
CPU
Q416
UL
X401
IC400
PLL
IC500
CV
CLK,DAT,EN TCXO
VCO BUFF SW
MB
D100
T/R
To Drive Amp
BUFF
D103
SW
To Mixer
Q310
Fig2. PLL circuit

RP3000 Circuit Description
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1) PLL
IC400 is a divider. Step frequency of PLL circuit is 2.5 KHz or 6.25 KHz. A 16.8MHz reference
oscillator signal is divided at IC400 by a fixed counter to generate a 2.5 KHz or 6.25 KHz reference
frequency. Output signal from VCO is buffer amplified by Q416 and divided at IC400 by a frequency
divider. Divided signal is compared in the phase comparator with 2.5 KHz or 6.25KHz reference
signal of IC400. Output signal from phase comparator is filtered through a low pass filter and
passed to the VCO to control oscillator frequency.
2) VCO
The operating frequency is generated by Q352 in transmit mode and by Q350 in receive mode.
Operating frequency generates a control voltage by phase comparator to control varactor diodes so
that the oscillator frequency is consistent with the MCU preset frequency (D350, D352, D354 and
D355 in transmit mode and D351, D353, D356 and D357 in receive mode). T/R pin is set high level
in receive mode and low in transmit mode. The output from Q352 and Q350 is amplified by Q354
and sent to buffer amplifier.
3) Unlock Detector
An unlock condition appears if low level appears at LOCK pin of IC400. Transmission is forbidden if
this condition is detected by microprocessor.
3. Receiver
The receiver utilizes double conversion superheterodyne.
C
ANT
ANT
SW
BPF Q201
RF AMP
BPF
MCF
XF201
IF AMP
Q222
MIXER
IC218
CF201,202
IF,MIX,DET
IC204
AF AMP
IC720 SP
1st Local OSC
(PLL)
2nd Local OSC
IF AMP
Q216
Fig.3 Receiver Section Configuration
1) Front-end Amplifier
The signal from antenna is amplified at RF amplifier (Q201) after passing through a
transmit/receive switch circuit and a band pass filter. The amplified signal is filtered
through a band pass filter to remove unwanted signals before it passes the first mixer.
2) First Mixer
The signal from RF amplifier is mixed with the first local oscillator signal from PLL frequency
synthesizer circuit at the first mixer (IC218) to create a 44.85MHz first IF signal. The first IF signal is
then fed through a crystal filter (XF201) to further remove spurious signals from adjacent channel.

RP3000 Circuit Description
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3) IF Amplifier
The first IF signal is amplified by Q216 before passing through crystal filter and by Q222 after crystal
filter and then enters IF processing chip IC204. The signal is mixed with the second local oscillator
signal again in IC204 to create a 455KHz second IF signal. The second IF signal then passes
through a 455KHz ceramic filter (wideband: CF201/narrowband: CF202) to eliminate unwanted
signals before it is amplified and detected in IC204.
4) Narrowband/Wideband Switch Circuit
Turn on ceramic filter CF201 (wideband)/CF202 (narrowband) to set each channel as wideband or
narrowband. W/N pin of IC500 outputs wideband (high level) and narrowband (low level) signal.
5) AF Amplifier
The result AF signal from IC204 is amplified by IC606, and then passes through AF processing chip
IC601 and compander IC603. The processed AF signal is then amplified by an AF power amplifier
(IC720) to drive the speaker.
4. Transmitter
1) AF and Signaling
Modulating signal from the microphone passes through Q700 switch and compander IC603 before
it enters AF processing chip IC601. CPU generates CTCSS/CDCSS signaling and IC601 produces
DTMF/2-Tone/5-Tone signaling, which then pass through MOD and enter VCO together with the
modulating signal for direct FM modulation. (See fig.5)
2) RF Amplifier
The transmit signal from VCO buffer amplifier (Q310) is amplified by Q101 and Q102. The
amplified signal is then amplified by the power amplifier Q105 and Q107 (include a two-stage FET
amplifier) to create 4.0W RF power. (See fig.4)
D
C
B
A
Title
AMP
Q101.102
5T
DRIVE AMP
Q105
FINAL AMP
Q107
ANT SW
D101 LPF
ANT
ANT SW
D201.202
RX
Q106
SW
Q109
SW
5T
IC100
APC
DET
Q103.Q104
B SW
B
APC
5T
TH101
SW
Q110 5T
Q108
SW 5TC
Fig.4 APC System

RP3000 Circuit Description
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3) Antenna Switch and LPF
Output signal from RF amplifier passes through a low-pass filter network and a transmit/receive
switch circuit comprised of D101, D201 and D202 before it reaches the antenna terminal. D201 and
D202 is turned on (conductive) in transmit mode and off (isolated) in receive mode.
4) APC
The automatic power control (APC) circuit stabilizes the transmit output power by detecting the
drain current of final stage amplifier FET. IC100 (2/2) compares the preset reference voltage with
the voltage obtained from final current. APC voltage is proportional to the difference between auto
detect voltage and reference voltage output from IC100 (1/2). The output voltage controls FET
power amplifier and keeps the transmitter output power constant. The output voltage can be varied
by the microprocessor, which hence controls the transmitter output power.
5. Signalling Section
The block diagram of signaling section is shown as figure 5.
D601
LIMITTER
X601
BASEBAND PROCESSOR
IC601
BBP_IRQN
BBP_RPL
SP
MIC SW
Q700 AF PA
IC710
SW
Q710
MIC
AUDIO_EN
EXT_SPK+
EXT_MIC
BBP_CSN
BBP_CMD
BBP_CLK
Q701
SW
EXT_MIC_SEL EXT_SP_SEL
IC605
BUFFER Ver
Vbias
COMPANDER
IC603
BYPATH
MOD
MB
COMPRESSOR EXPANDER
AF PA
MIC_FB AUDIO
IC606
BUFF AMP
Vbias
IC611
FILTER
Fig.5 AF and Signalling Circuit
In the transmit section, CTCSS/CDCSS signaling are produced by MCU and DTMF/2-Tone/5-Tone
by IC601 under the control of MCU. Signalings then enter VCO together with AF signal from MIC
for modulation.
In the receive section, after buffer amplified together with IF demodulation signals, the signallings
enter CPU and IC601 respectively for decode.

RP3000 Circuit Description
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6. Control System
The IC500 CPU operates at 9.8304MHz.
The block diagram of MCU control system is shown as following:
MCU
SAVE
APC/TV
BATT Det
VOL Level
CH Encode
5TC
5RC
W/N
MUTE
T/R
BEEP
LED
AP SW I/E RSSI PTT
KEY SW
TXD/RXD
CTC/CDC Codec
E2PROM FLASH
AF Processor
PLL IC
RESET
Fig.6 MCU Block Diagram
Circuit in this section is mainly comprised of MCU, EEPROM, FLASH and reset IC etc.
MCU control circuit accomplishes the following functions: accomplish the reset initialization
according to the programmed feature of the radio when power on; detect key signal and monitor
battery voltage; send necessary frequency data to PLL according to encode of the channel; switch
and control transmit/receive according to the signal input from PTT; turn on/off the mute circuit
according to the input signaling decode signal and squelch level signal; output control signal to
control the light/off of LED; control signaling process IC to perform tasks.

RP3000 CPU Pins
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CPU Pins
No. Port Name I/O Feature Description
1 P94 O Ver Frequency accuracy adjustment
2 P93 O APC/TV Transmit power/receiving sensitivity adjustment
3 P92 I MOTCON Motor control
4 P91 I External option judgement NC
5 P90 I SELF All reset mode control; ground this pin to enter all reset mode
6 BYTE I VCC 8 bit external data bus
7 CNVSS I GND MCU operates in single-chip mode after reset
8 P87 I Key2 NC
9 P86 I Key3 NC
10 RESET I Reset IC MCU reset when low level is input
11 Xout O Crystal oscillator output 9.8304M crystal oscillator
12 Vss I GND Ground
13 Xin I Crystal oscillator input 9.8304M crystal oscillator
14 Vcc I VCC Power supply
15 P85 I NMI Connect with high level
16 P84 I EN0 Channel selector knob input
17 P83 I SW1 A key
18 P82 I BBP_IRQN CMX881 interrupt output
19 P81 I BBP_RPL CMX881 data output
20 P80 O BBP_CLK CMX881 clock input
21 P77 O BBP_CMD CMX881 data input
22 P76 O BBP_CSN CMX881 data enable, low level: Enable
23 P75 O AUDIO_EN AF amplifier control H: Enable L: Standby
24 P74 O CTC_COD CTCSS output
25 P73 O BYPATH Compander enable L: Enable H: Disable
26 P72 O W/N Narrowband/wideband H: Wideband L: Narrowband
27 P71 I/O EEPROM_DATA EEPROM data
28 P70 O EEPROM_CLOCK EEPROM clock input
29 P67 O MIC_SEL
30 P66 I MIC_JUG
31 P65 I LOCK PLL unlock detect H: PLL lock L: PLL unlock
32 P64 O PLL_EN PLL IC strobe
33 P63 O TXD Serial data output
34 P62 I RXD Serial data input
35 P61 I Key4 NC

RP3000 CPU Pins
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36 P60 I SOFT_SW NC
37 P57 O VCC Clock output, connected to high level (Null)
38 P56 NULL
39 P55 I VCC HOLD pin, connected to high level (Null)
40 P54 NULL
41 P53 NULL
42 P52 O OE Flash data output enable, active low
43 P51 NULL
44 P50 O WE Flash data input enable, active low
45 P47 I OPTION2 External accessory select
46 P46 I OPTION1 External accessory select
47 P45 O T/R Transmit/receive PLL select
H: receive L: transmit
48 P44 O CE Flash chip select, active low
49 P43 NULL
50 P42 O A18 Flash address
51 P41 O A17 Flash address
52 P40 O A16 Flash address
53 P37 O A15 Flash address
54 P36 O A14 Flash address
55 P35 O A13 Flash address
56 P34 O A12 Flash address
57 P33 O A11 Flash address
58 P32 O A10 Flash address
59 P31 O A9 Flash address
60 Vcc I VCC
61 P30 O A8 Flash address
62 Vss I GND
63 P27 O A7 Flash address
64 P26 O A6 Flash address
65 P25 O A5 Flash address
66 P24 O A4 Flash address
67 P23 O A3 Flash address
68 P22 O A2 Flash address
69 P21 O A1 Flash address
70 P20 O A0 Flash address
71 P17 I SW3 C key
72 P16 I SW2 B key

RP3000 CPU Pins
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73 P15 I PTT PTT key
74 P14 O LR Red LED control H: light L: off
75 P13 O LG Green LED control H: light L: off
76 P12 O SAVE Battery save control H: off L: on
77 P11 O 5TC Transmit circuit power supply control
H: off L: on
78 P10 O 5RC Receive circuit power supply control
H: off L: on
79 P07 I/O D7 Flash data
80 P06 I/O D6 Flash data
81 P05 I/O D5 Flash data
82 P04 I/O D4 Flash data
83 P03 I/O D3 Flash data
84 P02 I/O D2 Flash data
85 P01 I/O D1 Flash data
86 P00 I/O D0 Flash data
87 P107 I EN3 Channel selector knob input
88 P106 I EN2 Channel selector knob input
89 P105 I EN1 Channel selector knob input
90 P104 I CTCSS_DEC CTCSS input
91 P103 I BATTD Low battery level detect (analogue)
92 P102 I SQL Squelch level input (analogue)
93 P101 I RSSI RSSI detect pin (analogue)
94 Avss I VCC A/D conversion power supply input
95 P100 I VOL Volume knob input (analogue)
96 Vref I VCC Battery detect reference voltage
97 Avcc I VCC A/D conversion power supply input
98 P97 NULL
99 P96 O PLL_DATA PLL IC data input
100 P95 O PLL_CLK PLL IC clock

RP3000 Adjustment Description
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Adjustment Description
Button Layout
1
4
9
7
8
6
5
3
2
Required Test Instrument
Radio communication test set 1 set
Scanner 1 set
3A/10V power supply 1 set
Digitalvoltmeter 1set
3AAmmeter 1set
Preparation
Open the programming software in PC and operate as the following instructions.
1. Programme Download
Connect the radio with the computer via download cable. And then turn the power on. LED glows orange.
Click “Programme Download” on the interface to select wanted programme. Click “Open” to begin
download and LED flashes orange. When download is completed, click “End” and turn the power off.
And then disconnect the download cable.
2. Initialization
Turn the power on while holding down [PTT] and [A] key simultaneously. LED glows orange and a BEEP
sounds. Radio channel frequency and setting data are initialized.
1. Antenna
2. Channel Selector knob
3. Power/Volume Control Knob
4. LED indicator
5. Programmable Key A
6. External Jack
7. Programmable Key B
8. Programmable Key C
9. PTT key

RP3000 Adjustment Description
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3. Destination Set
Connect the radio with the computer via programming cable. And then turn the power on. LED glows red.
Set “frequency range” on the programming software interface. And then click “Programme” →
“ Writing”.
4. Factory Setting
The compander is open. Squelch level 2. Adjustment mode is disabled.
Adjustment Method
1) Turn the power on while holding down PTT and programmable key C, after two seconds, the radio
enters adjustment mode.
2) CH1-CH16 are defined as following:
CH1: Transmitting VCO;
CH2: Receiving VCO;
CH3: CTCSS balance
CH4: Frequency Accuracy;
CH5: High power;
CH6: Low power;
CH7: CDCSS balance;
CH8: MIC sensitivity;
CH9: Maximum frequency deviation;
CH10: CTCSS deviation;
CH11: CDCSS deviation;
CH12: TONE deviation;
CH13: Receiving sensitivity;
CH14: Squelch level;
CH15: Low battery alert level;
CH16: VOX sensitivity.

RP3000 Adjustment Description
-18 -
VCO
Measurement Adjustment
Item Condition Test
Instrument Terminal Part Method
Specification/
Remarks
1. Setting Power supply 7.5V
1.Turn to CH1. Press
PTT. TX High Check 3.1V±0.2V
2.Transmit
VCO lock
voltage 2. Press PTT again.
TX Low Check 1.0V±0.2V
1. Turn to CH2. Press
PTT. TX High Check 3.1V±0.2V
3. Receiving
VCO lock
voltage 2. Press PTT again.
TX Low
Digital
Voltmeter CV TC350
TC351
Check 1.0V±0.2V
Transmitter
Measurement Adjustment
Item Condition Test Instrument Terminal Part Method
Specification/
Remarks
1. CTCSS
balance
2. Transmit
frequency
Turn to CH3.
Press PTT.
Turn to CH4.
Press PTT.
Oscillograph
Radio
Communication
Test Set
ANT
ANT
VR601
[B] (up)
[C] (down)
A
djust variable
resistor to rectify the
waveform to balance.
Press [A] to save.
A
djust to center
frequency. Press [A]
to save.
Error≤150Hz

RP3000 Adjustment Description
-19 -
1. Turn to CH5.
Press PTT.
Center frequency
A
djust to 4.0 W,
I≤1.6A.
Press [A] to save.
2. Press PTT.
Frequency changes
to low frequency.
A
djust to 4.0 W,
I≤1.6A.
Press [A] to save.
High
3. Press PTT again.
Frequency changes
to high frequency.
A
djust to 4.0 W,
I≤1.6A.
Press [A] to save.
4.0W±0.3W
1. Turn to CH6.
Press PTT.
Center frequency.
A
djust to 2.0 W,
I≤1.2A.
Press [A] to save.
2. Press PTT.
Frequency changes
to low frequency.
A
djust to 2.0 W,
I≤1.2A.
Press [A] to save.
3. Power
Low
3. Press PTT again.
Frequency changes
to high frequency.
Radio
Communication
Test Set
A
mmete
r
ANT [B] (up)
[C] (down)
A
djust to 2.0 W,
I≤1.2A.
Press [A] to save.
2W±0.3W
1. Turn to CH7.
Press PTT.
The radio operates
with wideband.
Center frequency.
2. Press PTT.
Frequency changes
to low frequency.
3. Press PTT again.
Frequency changes
to high frequency.
4. CDCSS
balance
Wideband
Narrow-
band
4. Press PTT for
two seconds. LED
flashes indicating
that the radio
operates with
narrowband.
Center frequency.
A
djust narrowband
following the above
steps.
Radio
Communication
Test Set
LPF: 15KHz
ANT [B] (up)
[C] (down)
Rectify the
waveform to
square wave.
Press [A] to
save.

RP3000 Adjustment Description
-20 -
1. Turn to CH8.
Press PTT.
The radio operates
with wideband.
Center frequency.
2. Press PTT.
Frequency
changes to low
frequency.
5. MIC Sensitivity
(Wideband)
3. Press PTT
again. Frequency
changes to high
frequency.
Radio
Communication
Test Set
LPF:15KHz
A
F: 1KHz 24mV
ANT
MIC Jack
[B] (up)
[C] (down)
Check Frequency
deviation
2.9±0.1KHz.
Press [A] to save.
Adjust as
wideband.
1. Turn to CH9.
Press PTT.
The radio operates
with wideband.
Center frequency.
2. Press PTT.
Frequency
changes to low
frequency.
Wideband
3. Press PTT
again. Frequency
changes to high
frequency.
A
djust it to
4.0KHz±100Hz.
Press [A] to save.
6. Maximum
frequency
deviation
Narrow-band
4. Press PTT for
two seconds. LED
flashes indicating
that the radio
operates with
narrowband.
Center frequency.
A
djust narrowband
following the above
steps.
Radio
Communication
Test Set
LPF:15KHz
A
F:1KHz
200mV
ANT
MIC Jack
[B] (up)
[C] (down)
A
djust it to
2.0KHz±100Hz.
Press [A] to save.