RELM Communications RPV516A VHF FM Transceiver User Manual
RELM Communications Inc VHF FM Transceiver Users Manual
Contents
- 1. Users Manual
 - 2. Revised Manual 121901
 - 3. Revised Manual 010402
 
Users Manual

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Owner’s Manual
Owner’s ManualOwner’s Manual
Owner’s Manual 
The following statement will be added here 
in the Owner’s Manual. 
FCC REQUIREMENTS
FCC REQUIREMENTSFCC REQUIREMENTS
FCC REQUIREMENTS 
The RPV516A portable radio must be 
properly licensed by the Federal 
Communications Commission (FCC) prior to 
use.  Your local RELM dealer can assist you 
in meeting this requirement. 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Owner’s Manual
Owner’s ManualOwner’s Manual
Owner’s Manual 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Owner’s Manual
Owner’s ManualOwner’s Manual
Owner’s Manual 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Owner’s Manual
Owner’s ManualOwner’s Manual
Owner’s Manual 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Owner’s Manual
Owner’s ManualOwner’s Manual
Owner’s Manual 
PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 24 
Catalog
CatalogCatalog
Catalog 
General
GeneralGeneral
General                                                 
                                                 P2
P2P2
P2 
Specifications
SpecificationsSpecifications
Specifications                                         
                                          P3
 P3 P3
 P3 
Mode Combination                                        P4
Mode Combination                                        P4Mode Combination                                        P4
Mode Combination                                        P4 
Circuit Description                                     P5
Circuit Description                                     P5Circuit Description                                     P5
Circuit Description                                     P5 
Softwar
SoftwarSoftwar
Software Description
e Descriptione Description
e Description                               
                                    P10
     P10     P10
     P10 
Test Description                                        P15
Test Description                                        P15Test Description                                        P15
Test Description                                        P15 
RPV516A
RPV516ARPV516A
RPV516A Circuit Diagram
 Circuit Diagram Circuit Diagram
 Circuit Diagram 
RPV516A
RPV516ARPV516A
RPV516APCB Component Diagram
PCB Component DiagramPCB Component Diagram
PCB Component Diagram(
((
(Two layers Mech 1 and 
Two layers Mech 1 and Two layers Mech 1 and 
Two layers Mech 1 and 
Mech 2 in PCB
Mech 2 in PCBMech 2 in PCB
Mech 2 in PCB)
))
) 
PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 25 
General
GeneralGeneral
General 
This manual is intended for use by experienced technicians familiar with 
similar types of commercial grade communications equipment. It contains 
main required service information and data for the equipment. 
The following precautions are recommended for personal safety: 
1. DO NOT transmit until all RF connectors are verified secure and any 
open connectors are properly terminated. 
2. SHUT OFF and DO NOT operate this equipment near electrical 
blasting caps or in an explosive atmosphere. 
3. This equipment should be maintained by qualified technicians only. 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 26 
Main technical specifications 
General RPV516A(1) RPV516A(2) 
Frequency  136MHz~150MHz  150MHz~174MHz 
      Channel  16 
Channel space  25kHz / 12.5kHz 
Antenna impedance  50• 
Transmitter 
impedance  2KΩ 
Input voltage  7.2V DC 
Frequency stability  ±2.5×10-6 
TCXO  12.8MHz 
CPU clock Freq  7.3728MHz 
  Transmitter 
Frequency stability  ±
2.5×
10-6 
Output power    4.0±
0.5W  
Operating 
sensitivity  12±4mV 
Audio distortion  ≤5% 
Modulation limiting  ≤5kHz / 2.5kHz 
Bandwidth  ≤16 kHz/8kHz 
Modulate speciality  ≤±3dB 
Spurious RF   ≤7.5μW 
Adjacent power  ≤-65 d B / -55dB 
  Receiver 
 Reference 
sensitivity  Precede 0.28•V / 0.35•V 
Squelch turnon 
sensitivity   ≤0.4•V 
Audio frequency  500mW 
Audio deviation  ≤7% 
Operating bandwidth  ≥│
±
7 kHz│/│±
3.5 kHz│ 
Audio response    ≤+2dB   -8dB 
First IF Freq  38.85MHz 
Second IF Freq  450kHz 
Channel restrain  ≥-8 d B 
Obstruct  ≥85d B 
Selectivity  ≥65 d B / 60dB 
Spurious response  ≥60 d B 
Intermodulation  ≥60 d B 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 27 
Mode combination 
1.Mode 
User mode: Turn on the power to enter. 
PC mode:Set and adjust with PC software or programmer. 
2. Parts description: 
•.Antenna                                                 
•.Channel (frequency) selector knob 
turn the knob to choose channel from 1~16•channel 16 may be set by 
distributor as scan channel•• 
•.LED light 
Lights red while transmitting, green while receiving a signal. Flashes red 
when the battery voltage is low, while transmitting. 
•.Power switch/Volume control 
Turn the knob clockwise to switch the transceiver ON, anti-clockwise to turn 
off the power till there is a “click” sound , rotate to adjust the volume level. 
(5)Speaker 
•.Microphone 
•.PTT•push to talk•switch 
Press the button while transmitting, and release it while receiving. 
•.Monitor key 
Press it to shut off squelch, noise could be heard, release to connect 
squelch. 
•.Speaker/microphone jack 
•.Belt clip 
•.Battery•TB-82• 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 28 
Circuit Description 
3. Frequency configuration 
The receiver utilizes double conversion. The first IF is 38.85MHz and the 
second IF is 450KHZ. The first local oscillator signal is supplied from the 
PLL circuit. 
The PLL circuit in  the transmitter generates the necessary frequencies. 
Fig.1 shows the frequencies. 
                      Fig1.  Frequency configuration 
4. Receiver 
The receiver is double conversion superheterodyne, designed to 
operate in the frequency range of 150-174 MHz (M type), 136——
150MHZ•M2 type•• 
1)  Front-end RF amplifier 
An incoming signal from the antenna is applied to an RF 
amplifier(Q203) after passing through a transmit/receive switch 
circuit(D 102 and D103 are off ) and a band pass filter(L208, L209 
and L210). After the signal is amplified(Q203), the signal is filtered 
through a band pass filter (L203 and L214) to eliminate unwanted 
signals before it is passed to the first mixer. Band pass filters (L208, 
L209, L210, L203 and L214) have varactor diodes (D203, D204, 
D206, D202 and D201). 
The voltage of these diodes are controlled by to track the MPU 
(IC403) center frequency of the band pass filter. (See Fig. 2) 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 29 
Fig. 2.  Receiver section configuration 
2) First Mixer 
The signal from the RF amplifier is heterodyned with the first local 
oscillator signal from the PLL frequency synthesizer circuit at the first 
mixer (Q202) to create a 38.85 MHz first intermediate frequency (1st 
IF) signal. The first IF signal is then fed through two monolithic crystal 
filters (MCFs: XF200) to further remove spurious signals. 
3) IF amplifier 
The first IF signal is amplified by Q201, and then enters IC 200 (FM processing IC). The 
signal is heterodyned again with a second local oscillator signal within IC200 to create a 
450kHz second IF signal. The second IF signal is then fed through a 450kHz ceramic filter 
(CF200) to further eliminate unwanted signals before it is amplified and FM detected in 
IC200. 
4) AF amplifier 
The recovered AF signal obtained from IC200 is amplified by IC300 
(1/4), filtered by the IC300 low-pass filter (2/4) and IC300 high-pass 
filter (3/4) and  (4/4), and de-emphasized by R303 and C306. The AF 
signal is then passed through a WIDE/NARROW switch (Q303). The 
processed AF signal passes through an AF volume control and is 
amplified to a sufficient level to drive a loud speaker by an AF 
power amplifier (IC302). 
5) Squelch 
Part of the AF signal from the IC enters the FM IC again, and the 
noise component is amplified and rectified by a filter and an 
amplifier to produce a DC voltage corresponding to the noise level. 
The DC signal from the FM IC goes to the analog port of the 
microprocessor (IC403). IC403  determines whether to output 
sounds from the speaker, IC403 sends a high signal to the MUTE and 
AFCO lines and turns IC302 on through Q302, Q304, Q305, Q306 
and Q307. (See Fig.3) 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 30 
 Fig.3.  AF Amplifier and squelch 
6) Receiving signaling 
QT/DQT 
300 Hz and higher audio frequencies of the output signal from IF IC 
are cut by a low-pass filter (IC301). The resulting signal enters the 
microprocessor (IC403). IC403 determines whether the QT or DQT 
matches the preset value, and controls the MUTE and AFCO and the 
speaker output sounds according to the squelch results. 
3. PLL frequency synthesizer 
   The PLL circuit generates the first local oscillator signal for reception and 
the RF signal for transmission. 
2) PLL 
The frequency step of the PLL circuit is 5 or 6.25KHz. A 12.8MHz 
reference oscillator signal is divided at IC1 by a fixed counter to 
produce the 5 or 6.25KHz reference frequency. The voltage controlled 
oscillator (VCO) output signal is buffer amplified by Q6, then divided in 
IC1 by a dual-module programmable counter. The divided signal is 
compared in phase with the 5 or 6.25KHz reference signal in the phase 
comparator in IC1. The output signal from the phase comparator is 
filtered through a low-pass filter and passed to the VCO to control the 
oscillator frequency. (See Fig. 4) 
2) VCO 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 31 
The operating frequency is generated by Q4 in transmit mode and Q3 in receive mode. The 
oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase 
comparator, to the varactor diodes  (D2 and D4 in transmit mode and D1 and D3 in receive mode) 
. The T/R pin is set high in receive mode causing Q5 and Q7 to turn Q4 off, and turn Q3 on. The 
T/R pin is set low in transmit mode. The outputs from Q3 and Q4 are amplified by Q6 and sent to 
the buffer amplifiers. 
 Fig. 4.  PLL circuit 
4) UNLOCK DETECTOR 
If a pulse signal appears at the LD pin of IC1, an unlock condition 
occurs, and the DC voltage obtained from D7, R6, and C1 causes the 
voltage applied to the UL pin of the microprocessor to go low. When the 
microprocessor detects this condition, the transmitter is disabled, 
ignoring the push-to-talk switch input signal. (See Fig. 5) 
 Fig.5.   Unlock detector circuit 
4•Transmitter 
   1•Transmit audio 
The modulation signal from the microphone is amplified by IC500 
(1/2), passes through a preemphasis circuit, and amplified by the other 
IC500 (1/2) to perform IDC operation. The signal then passes through a low-
pass filter (splatter filter) (Q501 and Q502) and cuts 3kHz and higher 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 32 
frequencies. The resulting signal goes to the VCO through the VCO 
modulation terminal for direct FM modulation. (See Fig. 6) 
7) QT/DQT encoder 
A necessary signal for QT/DQT encoding is generated by IC403 and FM-
modulated to the PLL reference signal. Since the reference OSC does 
not modulate the loop characteristic frequency or higher, modulation is 
performed at the VCO side by adjusting the balance. (See Fig. 6) 
 •6.  Transmit audio QT/DQT 
8)  VCO and RF amplifier 
The transmit signal obtained from the VCO buffer amplifier Q100, is 
amplified by Q101. This amplified signal is passed to the power 
amplifier, Q102 and Q105, which consists of a 2-stage FET amplifier and 
is capable of producing up to 5W of RF power (See Fig. 7) 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 33 
 Fig. 7.  APC system 
9)  ANT switch and LPF 
The RF amplifier output signal is passed through a low-pass filter network 
and a transmit/receive switching circuit before it is passed to the antenna 
terminal. The transmit/receive switching circuit is comprised of D101, D102 
and D103. D102 and D103 turned on  (conductive ) in transmit mode and 
off (isolated) in receive mode. 
10) APC 
The automatic power control (APC) circuit stabilizes the transmitter output 
power at a predetermined level by sensing the drain current of the final 
amplifier Field Effect Transistor (FET). The voltage obtained from the 
above drain current with a reference voltage which is set using the 
microprocessor. An APC voltage proportional to the difference between 
the sensed voltage and the reference voltage appears at the output of 
IC100 (1/2). This output voltage controls the gate of the FET power 
amplifier, which keeps the transmitter output power can be varied by 
the microprocessor which in turn changes the reference voltage and 
hence , the output power. 
11)  Terminal protection circuit 
When the thermistor (TH102) reaches about 80℃•the protection circuit 
PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 34 
turns on Q110 to protect transmitting final amplifier (Q107). 
5•Power supply 
   A 5V reference power supply [5M] for the control circuit is derived from an 
internal battery. This reference is used to provide a 5V supply in transmit 
mode [5T] ,a 5V supply in receive mode [5R] , and a 5V•supply common in 
both modes [5C] based on the control signal sent from the microprocessor. 
6•Control system 
   The IC403 CPU operates at 7.37MHZ. This oscillator has a circuit that shifts 
the frequency according to the EEPROM data. 
PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 35 
RPV516A
RPV516ARPV516A
RPV516A/TC
/TC/TC
/TC368
368368
368 software specifications
 software specifications software specifications
 software specifications 
一. Specifications• 
1. Use mechanical knob to choose from 16 channels. 
  Frequency 
VHF:136~150MHz•VHF:150~174MHz•UHF:400~420MHz•UHF:450~47
0MHz 
2. Monitor 
3. Auto power saving 
4. Audio alarm 
5. Auto squelch control (0~9 level)• 
6. Timing 
7. Channel space 25KHz/12.5KHz(Wide/Narrow) 
8. CTCSS&DQT encode 
9. CTCSS &DQT decode 
10.  Busy channel lock 
11.  Clock frequency deviation 
12. Scan 
13. PC mode 
14.  PC modifying mode 
15. Wire clone 
16.  Manual modifying mode 
二. Description• 
1. User mode•general radio mode 
 2. PC mode• 
Make settings through external programmer or PC program software• 
(1) Receive frequency &transmit frequency 
(2) Receive signaling& Transmit signaling 
(3) Lock busy channel 
(4) Clock frequency deviation 
(5) Timing 
(6) Squelch level selectivity 
(7) Power saving 
(8) Audio Alarm 
(9) Channel space 25KHz/12.5KHz(Wide/Narrow) 
(10) Monitor mode 
(11) Scan mode 
PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 36 
(12) Reset scan mode 
(13) Scan priority 
3. PC modify mode• 
Make settings through external programmer or PC program software: 
(1) 
Frequency stability 
(2) 
RF power 
(3) 
Low power alarm 
(4) Squelch•level 9&3• 
(5) CTCSS deviation•Wide/Narrow•• 
(6) 
DQT deviation•Wide/Narrow•• 
(7) 
Receive sensitivity•low•medium•high• 
4. Wire Clone: 
Press MONI to turn on the power , enter wire clone mode 2 seconds 
later, press PTT,  
Begin cloning while red lights, finish while light goes out. 
5.  Mode setting:  
• Short cut the SELF on PCB, and turn on the power till “BEEP”. 
• Set channel selector knob to corresponding place according to 
the model•1-16• 
• Press [MONI]•then press [PTT], to set the channel, channel data and 
initial data. 
• Turn off the power, disconnect SELF on PCB to end mode settings.  
Eg. RPV516A•2•, its serial number is 2, to initialize: short cut SELF on 
PCB to turn on  
The power, set channel selector knob at CH2, press MONI, then press 
PTT, the initial data of 1-4 channel can be found in the diagram, 
serial number 2. Reset data to initial data. The receive and transmit 
frequency of channel 5-14 are the same with channel 1, signals are 
channel5, 10•67.0Hz•6,11•151.4Hz•7,12•250.3Hz•8,13•423•DQT••9,14•-
423•DQT•, Channel 1-9 are Wide , Channel 10-14 are Narrow•Turn off 
the power after reset, disconnecting SELF and restart the power to 
use the transceiver. 
• Remarks: 
The old data(frequency, CTCSS/DQT, channel function) will be deleted once set the new 
mode by pressing MONI AND PTT , part of the function also would be changed. Therefore, 
do not set this operation unless change the EEPROM, etc. 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 37 
•RPV516A/TC368 channel frequency diagram (after setting):  
1CH 2CH(central) 3CH(•) 4CH(H) 
No  Model  Frequency(M
Hz)  Initial 
(MHz)  IF(MHz)  Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) 
1 RPV516
A(1)  136.000~149.
995  140.00
0  +38.85 143.10
0  143.10
0  143.00
0  143.10
0  136.00
0  136.10
0  149.97
5  149.90
0 
2 RPV516
A(2)  150.000~173.
995  150.00
0  +38.85 162.10
0  162.10
0  162.00
0  162.10
0  150.00
0  150.10
0  173.97
5  173.90
0 
3 TC368(1
)  400.000~419.
995  410.00
0  -38.85 410.10
0  410.10
0  410.00
0  410.10
0  400.00
0  400.10
0  419.97
5  419.90
0 
4 TC368(2
)  450.000~469.
995  450.00
0  -38.85 460.10
0  460.10
0  460.00
0  460.10
0  450.00
0  450.10
0  469.97
5  469.90
0 
5  350.000~369.
995  360.00
0  -38.85 360.10
0  360.10
0  360.00
0  360.10
0  350.00
0  350.10
0  369.97
5  369.90
0 
6  370.000~389.
995  380.00
0  -38.85 380.10
0  380.10
0  380.00
0  380.10
0  370.00
0  370.10
0  389.97
5  389.90
0 
7  220.000~239.
995  230.00
0  -38.85 230.10
0  230.10
0  230.00
0  230.10
0  220.00
0  220.10
0  239.97
5  239.90
0 
8  240.000~259.
995  250.00
0  -38.85 250.10
0  250.10
0  250.00
0  250.10
0  240.00
0  240.10
0  259.97
5  259.90
0 
9  406.000~429.
995  410.00
0  -38.85 418.10
0  418.10
0  418.00
0  418.10
0  406.00
0  406.10
0  429.97
5  429.90
0 
10  144.000~147.
995  145.00
0  +38.85 146.10
0  146.10
0  146.00
0  146.10
0  144.00
0  144.10
0  147.97
5  147.90
0 
11  336.000~367.
995  350.00
0  -38.85 352.10
0  352.10
0  352.00
0  352.10
0  336.00
0  336.10
0  367.97
5  367.90
0 
12  268.000~395.
995  380.00
0  -38.85 382.10
0  382.10
0  382.00
0  382.10
0  268.00
0  268.10
0  395.97
5  395.90
0 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service
ServiceService
Service Manual
 Manual Manual
 Manual 
DR•                         CHKD•                       APPD• 38 
13  430.000~439.
995  430.00
0  -38.85 435.10
0  435.10
0  435.00
0  435.10
0  430.00
0  430.10
0  439.97
5  439.90
0 
14  438.000~449.
995  440.00
0  -38.85 444.10
0  444.10
0  444.00
0  444.10
0  438.00
0  438.10
0  449.97
5  449.90
0 
15  465.000~494.
995  480.00
0  -38.85 480.10
0  480.10
0  480.00
0  480.10
0  465.00
0  465.10
0  494.97
5  494.90
0 
16  490.000~519.
995  500.00
0  -38.85 505.10
0  505.10
0  505.00
0  505.10
0  490.00
0  490.10
0  519.97
5  519.90
0 
Initialization data of channel are in the above diagram CH1-CH4 •the modify frequency is reset to initial data . Frequency of 
Channel 5-14 are the same with Channel 1•signals are 5,10••67.0Hz•6, 11••151.4Hz•7,12•250.3Hz•8, 13••423•DQT••9, 14 •-
423•DQT•. Channel 1-9 are Wide, Channel 10-14 are Narrow• 
PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service Manual
Service ManualService Manual
Service Manual 
DR•                         CHKD•                       APPD• 39 
 6.  Manual Modify Mode• 
Press PTT and MONI simultaneously to turn on the power•enter manual modify 
mode out 3 seconds later. Choose the settings by turning the channel selector 
knob 1-12CH,           use PTT•upward•or MONI•downward•to modify•Notice: MIC 
shouldn’t be connected with external cable while modifying•,1~12CH are 
defined as follows: 
(1) Frequency stability 
(2) RF power 
(3) Low power alarm 
(4) Receiver sensitivity•IF point modify) 
(5) Receiver sensitivity•low point modify) 
(6) Receiver sensitivity (high point modify) 
(7) Squelch• level 9• 
(8) Squelch•level 3• 
(9) CTCSS deviation•Wide• 
(10) CTCSS deviation•Narrow• 
(11) DQT deviation•Wide• 
(12) DQT deviation•Narrow• 
13~16CH are used for adjusting transmitter and receiver. Press PTT to transmit; 
Press MONI to choose: Wide/Narrow•one Beep sound is Narrow•two Beep 
sound  is Wide. 13~16CH are defined as follows: 
(13) IF frequency (discrepancy of transmission and receive frequency 
is 0.1MHz). 
(14) Lowest frequency (discrepancy of transmission and receive 
frequency is 0.1MHz). 
(15) Highest frequency (discrepancy of transmission and receive 
frequency is -0.075MHz)• 
(16) IF frequency•sends 250.3Hz CTCSS signals (discrepancy of 
transmission and receive frequency is 0.1MHz). 
Notice:To enter and shut off manual modify mode by short cut the SELF. Turn on the 
power, and enter settings mode, the manual function is automatically on. Press [PTT] 
to disable manual modify. Once this function is disabled, this mode is not accessible, 
kindly suggest disable this mode after modifying. 
••CPU• 
CPU control M38034M4  

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service Manual
Service ManualService Manual
Service Manual 
DR•                         CHKD•                       APPD• 40 
Pin No.  Port 
name  I/O Function 
1  TI  I  Input QT/DQT signal 
2  BUSY  I  Input busy signal 
3  BATT  I  Detect battery voltage 
4 NC I NC 
5 TO O Output QT/DQT 
6 BEEP O Beep output 
7 NC I NC 
8 ENC0 I Input encode 
9 ENC1 I Input encode 
10 ENC2 I Input encode 
11 ENC3 I Input encode 
12 NC I NC 
13 PTT I [PTT] input •connect RXD 
14 TXD O RS-232C output 
15 RXD I RS-232C input 
16 MONI I [MONI] input 
17 SELF I program          L•set up mode 
18 CNVSS I  Connect VSS 
19 RST I Reset  
20 INT0 I Power detection 
21 NC I NC 
22 XIN I Oscillator•7.3728MHz• 
23 XOUT O 
Oscillator 
24 VSS I Grounding 
25  SHIFT  O  Clock frequency deviation           H•unlock 
26  PABC  O  MOS  FET power                 H•unlock 
27  WNRC  O  Audio referential sensitivity    L•narrow 
28 WNTC O Max deviation               H•narrow 
29 NC I NC 
30  SDA  I/O  EEPROM data cable 
31  SCL  O  EEPROM clock cable 
32  UL  I  Lock circuit detector       L•unlock 
33  DT  O  Common data output 
34  CK  O  Common clock output 
35  LE  O  PLL IC                H•lock up 
36  5MC  O  Power  control except CPU and EEPROM       
L•unlock 
37 AFCO O AF amplifier             H•unlock 
38  RX  O  TX/RX VCO             H•receive 
39  GLED  O  Green light control        H•light 
40  RLED  O  Red light control          H•light 
41  SAVE  O  Power saving control       H•power saving OFF 
42 MUTE O Squelch control           H•Mic squelch   L•AF 
squelch 
43  5RC  O  Receiver power control     L•unlock 
44  5TC  O  Transmitter power control   H•unlock 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service Manual
Service ManualService Manual
Service Manual 
DR•                         CHKD•                       APPD• 41 
45 NC I NC 
46 NC I NC 
47 NC I NC 
48 NC I NC 
49 NC I NC 
50 NC I NC 
51 NC I NC 
52 NC I NC 
53 NC I NC 
54 NC I NC 
55 VCCN O Frequency output 
56 APC O TX•auto frequency output   RX•BPF tune output 
57  VCC  I  CPU input power 5V 
58  VREF  I  Connect with VCC 
59  AVSS  I  Connect with VSS 
60 NC I NC 
61 NC I NC 
62 NC I NC 
63 NC I NC  
64  TIBI  I  QT/DQT exterior circuit central point input 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service Manual
Service ManualService Manual
Service Manual 
DR•                         CHKD•                       APPD• 42 
RPV516
RPV516RPV516
RPV516 adjust description
 adjust description adjust description
 adjust description 
Use programmer or PC software to program RPV516, or by manual program ,  
eg . To program RPV516A( refer to“RPV516/TC368 software description”for the 
manual 
program and mode settings•. 
一. Instrument• 
1• Synthesized test instrument    1 set 
2• Scanner                   1 set 
3• 3A/10V power              1 set 
4• Digital Voltmeter            1 set 
5• 3A DC Ammeter            1 set 
•• Adjust• 
1. Initialization:It is necessary to initialize the transceiver because there is 
useless data in EEPROM. Short cut the SELF on PCB, turn on the power till 
there comes the sound ”BEEP”•place the channel selector knob at 
CH1[RPV516B•1•] or CH2[RPV516A(2)]• press [MONI]• then press [ PTT] • to 
begin initializing the channel and other data. Please refer to the outcome 
of initialization at“RPV516/TC368 software description”. 
2. Adjust:The adjustment of RPV516, some are conducted in normal 
mode, some are in manual program mode. Turn on the power and enter 
the normal mode., at the same time, press the  PTT and MONI to turn on 
the transceiver•enter the manual program mode 3seconds later.•refer 
to“RPV516/TC368 software description”manual program mode•. 
VCO SECTION:
VCO SECTION:VCO SECTION:
VCO SECTION: 
measurement
measurementmeasurement
measurement 
 Adjustment
AdjustmentAdjustment
Adjustment 
ITEM
ITEMITEM
ITEM 
 CONDITION
CONDITIONCONDITION
CONDITION 
 Test equip
Test equipTest equip
Test equip 
  term
 term term
 terminal
inalinal
inal 
 part
partpart
part 
 Method
MethodMethod
Method 
Specifications/
Specifications/Specifications/
Specifications/
Remarks
RemarksRemarks
Remarks 
1.Setting 1.power 7.5V            
1.CH: TX HIGH  3.7V±0.1V    
2.Transmit VCO 
lock voltage  2.CH: TX LOW  check  •0.7V 
1.CH: RX HIGH  3.7V±0.1V    
3.Receive 
VCO lock 
voltage  2.CH: RX LOW 
Digital 
Voltmeter CV TC1 
check 
Notice:if unlock VCO, check adjustment is enabled in manual mode.(signal could 
be transmitted 
regardless of the lock of VCO in manual mode). 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service Manual
Service ManualService Manual
Service Manual 
DR•                         CHKD•                       APPD• 43 
Adjust the receiver section
Adjust the receiver sectionAdjust the receiver section
Adjust the receiver section:
::
:(enter manual mode) 
Measurement
MeasurementMeasurement
Measurement 
            Adjustment
          Adjustment          Adjustment
          Adjustment 
Item
ItemItem
Item 
 Condition
ConditionCondition
Condition 
 Test equip
Test equipTest equip
Test equip 
 Terminal
TerminalTerminal
Terminal 
 parts
partsparts
parts 
          Method
        Method        Method
        Method 
Specificati
SpecificatiSpecificati
Specificati
ons/Remarks
ons/Remarksons/Remarks
ons/Remarks 
1:CH:RX center 
 turn to channel 4 in 
manual mode  TC201    
Adjust the undee to the top, the 
bandwidth is about 10MHz, the 
sign of central frequency is in 
the middle of the undee 
2. CH: RX LOW 
 turn to channel 5 in 
manual mode 
PTT(up)   
MONI 
(down) 
Adjust the undee to the top to 
receive 
Low frequency , the sign is on 
the left of the top of the undee 
4.Band-pass 
filter 
3.CH:RX HIGH   
turn to channel 6 in 
manual mode 
Spectrum 
analyzer  ANT . TP2 
PTT(up)   
MONI 
(down) 
Adjust the undee to the top to 
receive 
High frequency , the sign is on 
the right of the top of the 
undee 
1. CH:RX center  
Turn to channel 13 
in manual mode 
dev : Wide 
2. CH: RX center  
Turn to channel 14 
in manual mode 
dev : Wide 
5.Sensitivity  
 (Wide) 
3. CH: RX center  
Turn to channel 15 
in manual mode 
dev : Wide 
Synthetical 
test        
SSG output : 
      -118dBm 
MOD:1kHz   
DEV:±3kHz   
FILER:  0.3-
3.4kHz      
ANT 
SP         
             check 
SINAD: 12dB 
or higher 
1. CH: RX center  
Turn to channel 13 
in manual mode 
Dev : narrow 
2. CH: RX center  
Turn to channel 14 
in manual mode 
Dev : narrow 
6.Sensitivity  
(Narrow) 
3. CH: RX center  
Turn to channel 15 
in manual mode 
dev : narrow 
Synthetical 
test        
SSG output : 
      -116dBm 
MOD:1kHz   
DEV:±1.5kHz 
 FILER:  0.3-
3.4kHz      
ANT        
SP            check 
SINAD: 12dB 
or higher  
1.CH: RX center  
Turn to channel 7 in 
manual mode 
Synthetical 
test      SSG 
output :       -
117dBm 
Level 9                     
Adjust to close the squelch. 
The squelch 
must be 
closed 
7.Squelch 
1.CH:RX center 
Turn to channel 8 in 
manual mode 
Synthetical 
test      SSG 
out
p
ut :       -
ANT        
SP          PTT(up)   
MONI 
(down) 
Level 3                     
Adjust to close the squelch. 
The squelch 
must be 
closed

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service Manual
Service ManualService Manual
Service Manual 
DR•                         CHKD•                       APPD• 44 
 manual mode  output :       -
125dBm 
 closed 
Adjust the Transmi
Adjust the TransmiAdjust the Transmi
Adjust the Transmitter section
tter sectiontter section
tter section:
::
: 
Measurement
MeasurementMeasurement
Measurement 
 Adjustment
AdjustmentAdjustment
Adjustment 
Item
ItemItem
Item 
 Condition
ConditionCondition
Condition 
 Test 
Test Test 
Test 
equip
equipequip
equip 
 Terminal
TerminalTerminal
Terminal 
 Parts
PartsParts
Parts 
 Method
MethodMethod
Method 
Specificati
SpecificatiSpecificati
Specificati
ons/Remarks
ons/Remarksons/Remarks
ons/Remarks 
8.Transimet 
frequency 
CH: TX center 
Turn to channel 1 in 
manual mode 
Synthetical 
test    ANT  PTT•up•MO
NI•down• Adjust it to center frequency error•150Hz 
1.CH:TX center 
Turn to channel 2 in 
manual mode 
PTT•up•MO
NI•down• Adjust it to:4.0•Po•4.8 W        
                             I•1.6A  
2.CH: TX LOW 
Turn to channel 3 
Press PTT 
Check:4.0•Po•4.8W            
                      I•1.6A   
9.Power 
3.CH:TX HIGH 
Turn to channel 4 
Press PTT 
Synthetical 
test     
Ammeter ANT 
Check:4.0•Po•4.8 W           
                       I•1.6A   
1.CH: TX center,   
turn to channel 13 
in manual mode, 
dev: wide 
Press PTT 
VR501  Adjust it to:4.2kHz±100Hz Wide 
10.MAX DEV  2.CH: TX center,   
turn to channel 13 
in manual mode, 
dev: narrow 
Press PTT 
Synthetical 
test      LPF: 
15kHz      
AF:1kHz  
120mV 
ANT        MIC 
   Check:1.8kHz-2.2kHz Narrow 
1.CH: TX center,   
turn to channel 13 
in manual mode, 
dev: wide 
Press PTT 
VR501 Check:2.2kHz-3.6kHz Wide 
11.MIC SENS  2.CH: TX center,   
turn to channel 13 
in manual mode, 
dev: narrow 
Press PTT 
Synthetical 
test      FILER: 
         0.3-
3.4kHz      
AF:1kHz  
12mV 
ANT        MIC 
   Check:1.1kHz-1.8kHz Narrow 
1.CH: TX center,   
turn to channel 9 in 
manual mode 
67.0Hz  
CTCSS 
12.DQT/QT 
2.CH: TX center,   
turn to channel 16 
in manual mode, 
press PTT 
Synthetical 
test      LPF: 
300Hz 
ANT VR500 
Adjust VR500,the test value of on 
condition 1 & condition 2 is 
consistent,  the difference 
value•20Hz 
250.3Hz 
CTCSS 

PRELIMINARY 
PRELIMINARY PRELIMINARY 
PRELIMINARY –
––
– 
 Service Manual
Service ManualService Manual
Service Manual 
DR•                         CHKD•                       APPD• 45 
1.CH: TX center,   
turn to channel 9 in 
manual mode  Adjust it to:0.75kHz±50Hz Wide 
13.QT DEV  2.CH: TX center,   
turn to channel 10 
in manual mode  Adjust it to:0.35kHz±50Hz Narrow 
1.CH: TX center,   
turn to channel 11 
in manual mode  Adjust it to:0.75kHz±50Hz Wide 
14.DQT DEV  2.CH:TX center,   
turn to channel 12 
in manual mode 
Synthetical 
test   
LPF:300Hz ANT  PTT•up•MO
NI•down• 
Adjust it to:0.35kHz±50Hz Narrow 
15.Low 
Battery level 
Turn to channel 3 in 
manual mode,    
Adjust the battery 
to 5.8V 
Digtal 
voltmeter     PTT•up•MO
NI•down• Adjust so that the LED flashes   
Notice
NoticeNotice
Notice:
::
:In manual mode , channel selector 1
In manual mode , channel selector 1In manual mode , channel selector 1
In manual mode , channel selector 1-
--
-12
1212
12,
,,
,M
MM
MIC
ICIC
IC can
 can can
 can’
’’’t connect line
t connect linet connect line
t connect line,
,,
,after 
after after 
after 
adjust complete
adjust completeadjust complete
adjust complete,
,,
,short 
short short 
short SELF
SELFSELF
SELF,
,,
,enter mode setting
enter mode settingenter mode setting
enter mode setting,
,,
,press 
press press 
press PTT
PTTPTT
PTT,
,,
,disable manual 
disable manual disable manual 
disable manual 
adjust.
adjust.adjust.
adjust.