RELM Communications RPU416A UHF FM Transceiver User Manual Service Manual

RELM Communications Inc UHF FM Transceiver Service Manual

Service Manual

Download: RELM Communications RPU416A UHF FM Transceiver User Manual Service Manual
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Document ID233592
Application IDe9hSkanpPAaCzjOgqSTEow==
Document DescriptionService Manual
Short Term ConfidentialNo
Permanent ConfidentialNo
SupercedeNo
Document TypeUser Manual
Display FormatMicrosoft Word - pdf
Filesize99.16kB (1239553 bits)
Date Submitted2002-03-27 00:00:00
Date Available2002-06-07 00:00:00
Creation Date2002-03-27 10:42:42
Producing SoftwareAcrobat Distiller 4.0 for Windows
Document Lastmod2002-03-27 10:42:46
Document TitleService Manual

CONTENTS
General
Mode Combination
RPU416A Circuit Description
RPU416A Software Description
10
RPU416A Parts List
RPU416A Adjust Description
26
Disassembly for Repair
30
Exploded View
31
Packing
32
RPU416A PC Board View
33
RPU416A Block Diagram
37
RPU416A Level Diagram
39
RPU416A Schematic Diagram
41
Main Technical Specifications
49
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:
! DO NOT transmit until all RF connectors are verified secure and any open connectors are
properly terminated.
! SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive
atmosphere.
! This equipment should be maintained by qualified technicians only.
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:
(1) Antenna
(2) Channel (frequency) selector knob
Turn the knob to choose channel from 1~16(channel 16 may be set by distributor as scan channel).
(3) LED light
Lights red while transmitting, green while receiving a signal. Flashes red when the battery voltage is
low while transmitting.
(4) 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
(6) Microphone
(7) PTT switch (push to talk)
Press the button while transmitting, and release it while receiving.
(8) Monitor key
Press it to shut off squelch, noise could be heard, release to connect squelch.
(9) Speaker/microphone jack
(10) Belt clip
(11) Battery (TB-82)
RPU416A Circuit Description
1. 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.
RPU416A frequency range: 450MHz—470MHz
CF
450KHz
ANT
MCF
RF
AMP
ANTSW
IF
SYSTEM
AF
AMP
SP
38.85MHz
X3
multiply
TCXO
12.8MHz
RX
PA
AMP
TX
AMP
PLL
VCO
MIC
AMP
MIC
TX
Fig.1 Frequency configuration
2. Receiver
The receiver is double conversion superheterodyne.
1) Front-end RF amplifier
An incoming signal from the antenna is applied to a Preamplifier (Q203) after passing through a
transmit/receive switch circuit (K102 and D103 are off) and a 3-pole LC filter. After the signal is amplified
(Q203), the signal is filtered by a band pass filter (a3-pole LC filter) to eliminate unwanted signals before it
is passed to the first mixer. The voltages of these diodes are controlled by to track the MPU. (See Fig. 2-b)
ANT
CF200
D102
D103
BPF
RF AMP
BPF
MIXER
L208-L211 Q203 L214.L203.L204 Q202
MCF
XF200
IF AMP
Q201
AF PA AMP
IC302
IF.MIX
IC200
AF AMP
LPF.HPF
IC300
SP
TUNE
APC
IC403
MCU
TCXO
X3
multiply
Q1
1st Local OSC
(PLL)
WIDE/NARROW SW
Q303
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
st
(1 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
RPU416A Circuit Description
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)
FM IF IC200
IF AMP
IC 300
DET
AF AMP
LPF
HPF
Q302
SW
IC302
AF/PF AMP
Q307
SW
SP
DET
HPF
AMP
Q304.Q305.Q306
SW
IC301
LPF
67 62
TI
AFCO
MUTE
BUSY
Q303
W/N SW
IC403
MPU
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.
1) 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
RPU416A Circuit Description
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 of Next Page)
D
PLL IC IC1
D2.4
I/N
Q4
TX VCO
Q2
RF AMP
5KHz/6.25KHz
Q6
BUFF AMP
LPF
PLL DATA
PHASE
COMPARATOR
CHARGE
PUMP
D1.3
REF OSC
Q3
RX VCO
I/M
Q5.7
T/R SW
5KHz/6.25KHz
12.8MHz
Fig. 4. PLL circuit
2) VCO
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.
3) 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)
5C
R6
IC1
IC403
D7
LD
UL
C1
PLL IC
MPU
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 frequencies.
RPU416A Circuit Description
The resulting signal goes to the VCO through the VCO modulation terminal for direct FM modulation. (See
Fig. 6)
2) 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)
IC500(1/2)
MIC
AMP
IC500(1/2)
IDC
PREEMPHASIS
Q501.502
LPF
(SPLATTER FILTER)
VR501
MAX
DEV
D5.Q4
MIC
VCO
Q503
SW
VR500
BALANCE
X1.IC1
IC403
QT/DQT
TO
REFERENCE
OSC
MUTE
Fig. 6. Transmit audio QT/DQT
3) RF amplifier
The transmit signal obtained from the VCO buffer amplifier Q100, is amplified by Q101 and
Q102. This amplified signal is passed to the power amplifier, Q105 and Q107, which consists of a 2-stage
FET amplifier and is capable of producing up to 4W of RF power (See Fig. 7-b)
ANT
AMP
Q101.102
DRIVE AMP
Q105
FINAL AMP
Q107
ANT SW
D101
LPF
5T
DET
Q103.Q104
B SW
Q109
SW
APC
IC100
5T
ANT SW
D102.103
Q106
SW
APC
Q108
SW
TH102
RX
5T
SW
Q110
5T
Title
Size
Number
Revision
Fig. 7 APC system
4) ANT switch and LPF
The RF amplifier output signal is passed through a low-pass filter network and a transmit/receive
RPU416A Circuit Description
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.
5) 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.
6) Terminal protection circuit
When the thermistor (TH102) reaches about 80", the protection circuit 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.
RPU416A Software Specifications
.Specifications:
1. Use mechanical knob to choose from 16 channels.
Frequency range: UHF: 450~470MHz
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.Two Tone Signal decode
11.Two Tone Signal encode
12.Busy channel lock
13.Clock frequency deviation
14.Scan
15.PC mode
16.PC modifying mode
17.Wire clone
18.Manual modifying mode
.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
(12) Reset scan mode
(13) Scan priority
3. PC modify mode:
Make settings through external programmer or PC program software:
RPU416A Software Specifications
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Frequency stability
RF power
Low power alarm
Squelch (level 9&3)
CTCSS deviation (Wide/Narrow).
DQT deviation (Wide/Narrow).
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:
(1) Short cut the SELF on PCB, and turn on the power till “BEEP”.
(2) Set channel selector knob to corresponding place according to the model(1-16)
10
(3) Press [MONI],then press [PTT], to set the channel, channel data and initial data.
(4) Turn off the power, disconnect SELF on PCB to end mode settings.
(5) 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.
11
RPU416A Software Specifications
(6) TC- 368(2) channel frequency diagram (after setting):
Frequency(MHz)
Initial
(MHz)
IF(MHz)
136.000~149.995
140.000
150.000~173.995
No
Model
1CH
2CH(Central)
3CH(L)
4CH(H)
Tx(MHz)
Rx(MHz)
Tx(MHz)
Rx(MHz)
Tx(MHz)
Rx(MHz)
Tx(MHz)
Rx(MHz)
+38.85
143.100
143.100
143.000
143.100
136.000
136.100
149.975
149.900
150.000
+38.85
162.100
162.100
162.000
162.100
150.000
150.100
173.975
173.900
400.000~419.995
410.000
-38.85
410.100
410.100
410.000
410.100
400.000
400.100
419.975
419.900
450.000~469.995
450.000
-38.85
460.100
460.100
460.000
460.100
450.000
450.100
469.975
469.900
350.000~369.995
360.000
-38.85
360.100
360.100
360.000
360.100
350.000
350.100
369.975
369.900
370.000~389.995
380.000
-38.85
380.100
380.100
380.000
380.100
370.000
370.100
389.975
389.900
220.000~239.995
230.000
-38.85
230.100
230.100
230.000
230.100
220.000
220.100
239.975
239.900
240.000~259.995
250.000
-38.85
250.100
250.100
250.000
250.100
240.000
240.100
259.975
259.900
406.000~429.995
410.000
-38.85
418.100
418.100
418.000
418.100
406.000
406.100
429.975
429.900
10
144.000~147.995
145.000
+38.85
146.100
146.100
146.000
146.100
144.000
144.100
147.975
147.900
11
336.000~367.995
350.000
-38.85
352.100
352.100
352.000
352.100
336.000
336.100
367.975
367.900
12
268.000~395.995
380.000
-38.85
382.100
382.100
382.000
382.100
268.000
268.100
395.975
395.900
13
430.000~439.995
430.000
-38.85
435.100
435.100
435.000
435.100
430.000
430.100
439.975
439.900
14
438.000~449.995
440.000
-38.85
444.100
444.100
444.000
444.100
438.000
438.100
449.975
449.900
15
465.000~494.995
480.000
-38.85
480.100
480.100
480.000
480.100
465.000
465.100
494.975
494.900
16
490.000~519.995
500.000
-38.85
505.100
505.100
505.000
505.100
490.000
490.100
519.975
519.900
RPU416A
RPU416A
Initialization data of channel are in the above diagram CH1-CH4, the modify frequency is reset to initial data. Frequency of CH5~CH14 are the same with CH1.
The signaling of CH5 and CH10 is 67.0Hz; the signaling of CH6 and CH11 is 151.4Hz; the signaling of CH7, CH12 is 250.3Hz; the signaling of CH8 and CH13 is
423(DQT); the signaling of CH9 and CH14 is -423(DQT). CH1~CH9 are Wide, CH10~CH14 are Narrow.
13
RPU416A Software Specifications
6. Manual Adjust Mode:
Press PTT and MONI simultaneously to turn on the power"enter manual Adjust mode out 3
seconds later. Choose the settings by turning the channel selector knob 1-12CH, use PTT
(upward) or MONI (downward) to adjust (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 (center frequency adjust)
(5) Receiver sensitivity (low frequency adjust)
(6) Receiver sensitivity (high frequency adjust)
(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) center 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) center frequency: sends 250.3Hz CTCSS signals (discrepancy of transmission and receive
frequency is 0.1MHz).
Note:
To enter and shut off manual adjust 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 adjust.
. CPU:
CPU control M38034M4
Pin No.
Port
name
I/O
10
TI
BUSY
BATT
NC
TO
BEEP
NC
ENC0
ENC1
ENC2
11
12
13
14
ENC3
NC
PTT
TXD
Function
Input QT/DQT signal
Input busy signal
Detect battery voltage
NC
Output QT/DQT
Beep output
NC
Input encode
Input encode
Input encode
Input encode
NC
[PTT] input ,connect RXD
RS-232C output
RPU416A Software Specifications
15
x16
17
18
19
20
21
22
14
RXD
MONI
SELF
CNVSS
RST
INT0
NC
XIN
RS-232C input
[MONI] input
Program
L: set up mode
Connect VSS
Reset
Power detection
NC
Oscillator(7.3728MHz)
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
XOUT
VSS
SHIFT
PABC
WNRC
WNTC
NC
SDA
SCL
UL
DT
CK
LE
5MC
AFCO
RX
GLED
RLED
SAVE
MUTE
5RC
5TC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
VCCN
APC
VCC
VREF
AVSS
NC
NC
NC
NC
TIBI
I/O
Oscillator
Grounding
Clock frequency deviation H: unlock
MOS FET power
H: unlock
Audio referential sensitivity L: narrow
Max deviation
H: narrow
NC
EEPROM data cable
EEPROM clock cable
Lock circuit detector
L: unlock
Common data output
Common clock output
PLL IC
H: lock up
Power control except CPU and EEPROM
L: unlock
AF amplifier
H: unlock
TX/RX VCO
H: receive
Green light control
H: light
Red light control
H: light
Power saving control
H: power saving OFF
Squelch control
H: mic squelch L:AF squelch
Receiver power control L: unlock
Transmitter power control H: unlock
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
Frequency output
TX:auto frequency output RX:BPF tune output
CPU input power 5V
Connect with VCC
Connect with VSS
NC
NC
NC
NC
QT/DQT exterior circuit central point input
15
RPU416A Adjust Description
Use programmer or PC software to program RPU416A, or by manual program, refer to”RPU416A
software description ” for the manual program and mode settings.
. Instrument:
1.
2.
3.
4.
5.
Synthesized test instrument 1 set
Scanner
1 set
3A/10V power
1 set
Digital Voltmeter
1 set
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, press [MONI], then press [PTT], to begin initializing the channel and other data. Please refer
to the outcome of initialization at”RPU416A software description”.
2.Adjustment:
The adjustment of RPU416A, 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”RPU416A
software description” manual program mode).
VCO SECTION:
measurement
ITEM
CONDITION
1.Setting
1.power 7.5V
2.Transmit
1.CH: TX HIGH
VCO
lock
voltage
2.CH: TX LOW
3.Receive
1.CH: RX HIGH
VCO
lock
voltage
2.CH: RX LOW
Test equip
terminal
Adjustment
part
Method
Specifications/
Remarks
3.7V±0.1V
Digital
Voltmeter
CV
TC1
check
RPU416A >1V
3.7V±0.1V
check
RPU416A>1V
Note:
If unlock VCO, check adjustment is enabled in manual mode.(signal could be transmitted regardless of the
lock of VCO in manual mode).
16
RPU416A Adjust Description
Adjust the receiver section: (enter manual mode)
Item
Condition
Measurement
Test equip Terminal
1:CH:RX center
turn to channel 4 in
manual mode
4.Band- 2. CH: RX LOW
Spectrum
pass
turn to channel 5 in
analyzer
filter
manual mode
ANT . TP2
parts
Adjustment
Method
TC202
TC203
Adjust the undee to the top,
the bandwidth is about
10MHz, the sign of central
frequency is in the middle of
the undee
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
Specifications
/Remarks
Adjust the undee to the top to
PTT(up)
receive
MONI High frequency , the sign is on
(down)
the right of the top of the
undee
3.CH:RX HIGH
turn to channel 6 in
manual mode
1. CH:RX center
Turn to channel 13 in
manual mode
Dev : Wide
Synthetical
test
2. CH: RX center
SSG output :
5.Sensitivity Turn to channel 14 in -118dBm
MOD:1kHz
(Wide) manual mode
Dev : Wide
DEV:±3kHz
FILER: 0.33.4kHz
3. CH: RX center
Turn to channel 15 in
manual mode
Dev : Wide
ANT
SP
check
SINAD: 12dB
or higher
ANT
SP
check
SINAD: 12dB
or higher
1. CH: RX center
Turn to channel 13 in
manual mode
Dev : narrow
Synthetical
test
2. CH: RX center
SSG output :
6.Sensitivity Turn to channel 14 in -116dBm
(Narrow) manual mode
MOD:1kHz
Dev : narrow
DEV:±1.5kH
z FILER:
0.3-3.4kHz
3. CH: RX center
Turn to channel 15 in
manual mode
dev : narrow
Synthetical
1.CH: RX center
test
SSG
Turn to channel 7 in
output :
manual mode
117dBm
7.Squelch
Synthetical
2.CH:RX center
test
SSG
Turn to channel 8 in
output :
manual mode
125dBm
Level 9
The squelch
Adjust to close the squelch. must be closed
ANT
SP
PTT(up)
MONI
(down)
Level 3
The squelch
Adjust to close the squelch. must be closed
17
RPU416A Adjust Description
Adjust the transmitter section:
Item
Condition
Measurement
Test equip
CH: TX center
8.Transmit Turn to channel 1 in Synthetical
frequency
test
manual mode
Terminal
Parts
Method
Specifications
/Remarks
ANT
PTT(up)M
ONI(down)
Adjust it to center frequency
Error<150Hz
PTT(up)M
ONI(down)
Adjust it to:
3.7
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Create Date                     : 2002:03:27 10:42:42
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Modify Date                     : 2002:03:27 10:42:46-05:00
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FCC ID Filing: ARURPU416A

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