HYT Science and Technology Co TC3000V Two-Way Radio User Manual

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Date Submitted	2004-11-08 00:00:00
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Creation Date	2004-11-03 17:33:45
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Content
General
Brief Introduction
Radio Modes
Circuit Description
CPU Pins
Adjustment Description
TC3000-U Part List (Control Board)
TC3000-U Part List (RF Board)
TC3000-V Part List (Control Board)
TC3000-V Part List (RF Board)
Disassembly and Assembly for Repair
Exploded View
Part List 2
Packing
TC3000-U PC Board View
TC3000-V PC Board View
TC3000 Block Diagram
TC3000-U Schematic Diagram
TC3000-V Schematic Diagram
Specification
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:
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.
When in vehicles with an airbag, do not place a portable radio in the area over an
airbag or in the airbag deployment area.
Do not expose the radio to direct sunlight for a long time nor place it close to a
heating source.
Do not use any portable radio with a damaged antenna. If a damaged antenna comes
into contact with your skin, a minor burn may result.
When transmitting with a portable radio, hold the radio in a vertical position with its
microphone about 5 centimeters away from your mouth.
If 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.
This equipment should be serviced by a qualified technician only.
Brief Introduction
(1) Antenna
Used to transmit/receive signals.
(2) LED
Following table indicates LED indication and corresponding radio status.
LED
No display
Status
Standby
Green
Receive
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.
(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
Press and hold 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 briefly pressed, pressed and held or
held down:
Key function
Key Function
Briefly Press
Press and Hold
Hold Down
Emergency Siren
Enable emergency siren
Disable emergency siren
－
Monitor
－
－
Monitor
Scan
Enable/Disable scan
Enable/Disable scan
－
Nuisance Delete
Delete nuisance channel Delete nuisance channel in
in scan
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
Call
Select Repeater or
Select Repeater or
Reverse Frequency Mode Reverse Frequency Mode
Transmit a Call
Transmit a Call
－
－
Note: Please contact your dealer for more details about programmable keys.
Radio Modes
Radio Feature Description
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
CTCSS/CDCSS/2-Tone/5-Tone
Channel Spacing 25KHz/12.5KHz (Wide/Narrow)
Programmable key
Squelch Tail Elimination
Priority Channel Scan/Nuisance Delete
Busy Channel Lockout
High/Low Power
Emergency Siren
Repeater/Talk Around
Call
TOT
VOX
Battery Save
Low Battery Alert
Voice Compression and Expansion
Software Upgrade
Wired Clone
PC Mode
Frame of Radio Modes
Power On
User Mode
Clone Mode
PC Mode
Adjustment Mode
All Reset Mode
Entry for Mode Startup
User Mode
Turn the power on to enter user mode. This mode is for normal operation.
Clone Mode
1) Connect the two radios with the clone cable. Turn the power on while holding down PTT
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, pressing programmable key B can begin wired clone. MCU transmit 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.
PC Mode
1) Connect the radio with a PC by programming cable. And then turn the power on. The radio
enters PC mode after two seconds and LED glows orange.
2) Data can be transferred between MCU and PC via UART port. If data is transferred to the
radio from PC, it can be programmed into the EEPROM by MCU and LED flashes red during
data transfer. If data is transferred to PC from the radio, MCU sends the EEPROM data to PC
and LED flashes green during data transfer.
3) You can update software and provide second development feature for the user via PC
update programme. LED flashes orange during programme download.
4) To exit PC mode and enter conventional mode or other mode, turn on the power again.
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 A key to switch between wideband and narrowband.
Briefly press A key to save data. Press B key to adjust upwards and C downwards. Press PTT
to transmit or switch among center, low and high frequency.
CH1-CH16 are defined as following:
CH1: Transmitting VCO;
CH2: Receiving VCO;
CH3: Frequency Accuracy;
CH4: High power;
CH5: Low power;
CH6: CDCSS balance;
CH7: Maximum frequency deviation;
CH8: MIC sensitivity;
CH9: CTCSS deviation;
CH10: CDCSS deviation;
CH11: FFSK deviation;
CH12: TONE deviation;
CH13: Receiving sensitivity;
CH14: Squelch level;
CH15: Low battery alert level;
CH16: VOX sensitivity.
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.
AVR
BATT
FUSE
SW
5M
5R
5RC
SW
AVR
SW
PROTECT
5TC
5C
AVR
5T
1/2BIAS
BUFF
SAVE
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.
T/R
Q310
BUFF
VCO
D100
SW
To Drive Amp
Q416
BUFF
CV
D103
SW
IC400
PLL
To Mixer
UL
IC500
CPU
CLK,DAT,EN
X401
TCXO
MB
Fig2. PLL circuit
1) PLL
IC400 is fractional divider. Step frequency of PLL circuit is 2.5KHz or 6.25KHz. A
16.8MHz reference oscillator signal is divided at IC400 by a fixed counter to
generate a 20KHz or 50KHz 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 20KHz or 50KHz 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 the same as
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.
ANT
CF201,202
BPF
RF AMP
Q201
BPF
MIXER IF AMP
Q216
IC218
ANT
SW
MCF
XF201
IF AMP
Q222
AF AMP
IC720 SP
IF,MIX,DET
IC204
1st Local OSC
(PLL)
2nd Local OSC
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.
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. Under the control of MCU, IC601
produces DTMF/CTCSS/CDCSS/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)
AMP
Q101.102
DRIVE AMP
Q105
FINAL AMP
Q107
ANT SW
D101
ANT
LPF
5T
DET
Q103.Q104
B SW
Q109
SW
APC
IC100
5T
ANT SW
D201.202
Q106
SW
APC
TH101
Q108
SW
5T
SW
Q110
5TC
RX
5T
Title
Fig.4 APC System
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
10
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.
IC604
COM
SW
EXT_MIC
EXP_SW
IC603
MIC_FB
D601
LIMITTER
AF PA
SP
IC710
EXPANDER
Vbias
COMPRESSOR
Q701
SW
AF PA
COMPANDER
AUDIO
MIC
Q700
SW
MIC
EXP
SW
EXT_SPK+
COM_SW
Q710
SW
AUDIO_EN
Vbias
EXT_MIC_SEL
EXT_SP_SEL
IC605
BUFFER
IC611
FILTER
BASEBAND PROCESSOR
Ver
MB
IC601
AF DET
MOD
IC606
BUFF AMP
X601
BBP_RPL
BBP_IRQN
BBP_CLK
BBP_CMD
BBP_CSN
Fig.5 AF and Signalling Circuit
In the transmit section, signallings (CTCSS, CDCSS, DTMF, 2-Tone and 5-Tone) are
produced by IC601 under the control of MCU and 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 IC601 for decode. The decoded data is then sent to MCU for
recognition.
6. Control System
The IC500 CPU operates at 9.8304MHz.
The block diagram of MCU control system is shown as following:
11
E2PROM
RESET
FLASH
CTC/CDC Codec
AF Processor
MCU
TXD/RXD
PLL IC
APC/TV
SAVE
BEEP
LED
AP SW
MUTE
5TC
5RC
W/N
T/R
I/E
CH Encode
VOL Level
BATT Det
KEY SW
PTT
RSSI
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; output BEEP signal to drive the speaker.
12
CPU Pins
No.
Port Name
I/O
Feature
P94
Ver
P93
APC/TV
P92
Key1
P91
Description
Frequency accuracy adjustment
Transmit power/receiving sensitivity adjustment
NC
External option judgement NC
All reset mode control; ground this pin to enter all reset
P90
SELF
mode
BYTE
VCC
8 bit external data bus
CNVSS
GND
MCU operates in single-chip mode after reset
P87
Key2
NC
P86
Key3
10
RESET
Reset IC
NC
11
Xout
Crystal oscillator output
12
Vss
GND
13
Xin
Crystal oscillator input
14
Vcc
VCC
Power supply
15
P85
NMI
Connect with high level
16
P84
EN0
Channel selector knob input
17
P83
SW1
A key
18
P82
BBP_IRQN
CMX881 interrupt output
19
P81
BBP_RPL
CMX881 data output
MCU reset when low level is input
9.8304M crystal oscillator
Ground
9.8304M crystal oscillator
20
P80
BBP_CLK
CMX881 clock input
21
P77
BBP_CMD
CMX881 data input
22
P76
BBP_CSN
CMX881data enable, low level: Enable
23
P75
AUDIO_EN
AF amplifier control H: Enable
L: Standby
24
P74
COM_SW
Compressor enable H: Enable
L: Disable
25
P73
EXP_SW
Expander enable
L: Disable
26
P72
W/N
27
P71
I/O
EEPROM_DATA
28
P70
EEPROM_CLOCK
29
P67
NULL
NC
30
P66
NULL
NC
31
P65
LOCK
PLL unlock detect H: PLL lock
32
P64
PLL_EN
33
P63
TXD
Serial data output
34
P62
RXD
Serial data input
35
P61
Key4
NC
36
P60
37
P57
38
P56
39
P55
H: Enable
Narrowband/wideband H: Wideband L: Narrowband
EEPROM data
EEPROM clock input
L: PLL unlock
PLL IC strobe
External option judgement NC
VCC
Clock output, connected to high level (Null)
NULL
NC
VCC
HOLD pin, connected to high level (Null)
13
40
P54
NULL
NC
41
P53
NULL
NC
42
P52
43
P51
44
P50
WE
45
P47
OPTION2
External accessory select
46
P46
OPTION1
External accessory select
OE
NULL
Flash data output enable, active low
NC
Flash data input enable, active low
Transmit/receive PLL select
47
P45
T/R
H: receive
48
P44
CE
Flash chip select, active low
49
P43
50
P42
A18
Flash address
51
P41
A17
Flash address
52
P40
A16
Flash address
53
P37
A15
Flash address
54
P36
A14
Flash address
55
P35
A13
Flash address
56
P34
A12
Flash address
57
P33
A11
Flash address
58
P32
A10
Flash address
59
P31
A9
Flash address
NULL
L: transmit
NC
60
Vcc
VCC
61
P30
A8
62
Vss
GND
63
P27
A7
Flash address
64
P26
A6
Flash address
65
P25
A5
Flash address
66
P24
A4
Flash address
67
P23
A3
Flash address
68
P22
A2
Flash address
69
P21
A1
Flash address
70
P20
A0
Flash address
71
P17
SW3
C key
72
P16
SW2
B key
73
P15
PTT
PTT key
74
P14
LR
Red LED control
H: light
L: off
75
P13
LG
Green LED control
H: light
L: off
76
P12
SAVE
Battery save control
H: off
L: on
77
P11
5TC
Flash address
Transmit circuit power supply control
H: off
L: on
Receive circuit power supply control
78
P10
5RC
H: off
L: on
14
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
EN3
Channel selector knob input
88
P106
EN2
Channel selector knob input
89
P105
EN1
Channel selector knob input
90
P104
CTCSS_IN
91
P103
BATTD
92
P102
SQL
Squelch level input (analogue)
93
P101
RSSI
RSSI detect pin (analogue)
CTCSS input
Low battery level detect (analogue)
94
Avss
VCC
A/D conversion power supply input
95
P100
VOL
Volume knob input (analogue)
96
Vref
VCC
Battery detect reference voltage
97
Avcc
VCC
A/D conversion power supply input
98
P97
NULL
NC
99
P96
PLL_DATA
100
P95
PLL_CLK
PLL IC data input
PLL IC clock
15
Adjustment Description
Required Test Instrument
Radio communication test set
Scanner
3A/10V power supply
Digital voltmeter
3A Ammeter
1 set
1 set
1 set
1 set
1 set
Preparation
Open the programming software in PC and operate as the following instructions.
1. Programme Download:
Connect the radio with the computer via programming cable. And then turn the power on. LED
glows red. Click “Programme” → “Download” on the interface to choose programme. Click
“Open” to begin download and LED flashes red. When download is complete, click “End” and
turn the power off. And then disconnect the programming 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.
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
VCO
Measurement
Item
Condition
Test
Instrument
1. Setting
1.Turn to CH1. Press
lock
PTT. TX High
2. Press PTT again.
voltage
TX Low
3.
Receiving
VCO
voltage
Part
Specification/
Method
Remarks
Check
3.3V±0.2V
Check
1.0V±0.4V
Check
3.1V±0.2V
Check
1.0V±0.4V
Power supply 7.5V
2.Transmit
VCO
Terminal
Adjustment
lock
Digital
1. Turn to CH2. Press Voltmeter
PTT. TX High
2. Press PTT again.
TX Low
CV
TC350
TC351
16
Transmitter
Item
Measurement
Condition
Test Instrument
1. Transmit
Turn to CH3.
frequency
Press PTT.
Terminal
Radio
Communication
ANT
Test Set
Adjustment
Part
[B] (up)
[C] (down)
frequency. Press
[A] to save.
Press PTT.
I≤1.6A.
Center frequency
Press [A] to save.
Press
PTT.
high frequency.
Adjust to 4.0 W,
Radio
Communication
1. Turn to CH5.
Test Set
Press PTT.
Ammeter
4.0W±0.3W
I≤1.6A.
ANT
[B] (up)
Press [A] to save.
[C] (down) Adjust to 1.0 W,
I≤0.7A.
Center frequency.
Press [A] to save.
PTT.
Adjust to 1.0 W,
Low Frequency changes to
1W±0.3W
I≤0.7A.
low frequency.
Press [A] to save.
3. Press PTT again.
Adjust to 1.0 W,
Frequency changes to
I≤0.7A.
high frequency.
Press [A] to save.
Wideba- 1. Turn to CH6.
The
balance
with wideband.
radio
operates
Press
Communication
Test Set
LPF: 15KHz
Center frequency.
2.
Rectify
Radio
Press PTT.
CDCSS
4.0W±0.3W
Press [A] to save.
Frequency changes to
Press
150Hz
Adjust to 4.0 W,
3. Press PTT again.
2.
Error≤
I≤1.6A.
low frequency.
nd
Adjust to center
Adjust to 4.0 W,
2.
3.
/Remarks
Method
1. Turn to CH4.
High Frequency changes to
2. Power
Specification
ANT
[B] (up)
[C] (down)
the
waveform
to
square wave.
Press
[A]
to
save.
PTT.
Frequency changes to
low frequency.
3. Press PTT again.
Narrow- Frequency changes to
band
high frequency.
17
4. Press [A] for two
seconds. LED flashes
indicating
radio
that
the
operates
with
narrowband.
Center frequency.
Adjust
narrowband
following the above
steps.
1. Turn to CH7.
Wideband
4.
Maximu-
frequenc
deviation
The
radio
band
Communication
Test Set
seconds. LED flashes
LPF: 15KHz
radio
that
operates
to
Press [A] to save.
Radio
2. Press [A] for two
Narrow- indicating
it
4.0KHz±100Hz.
operates
with wideband.
Center frequency.
-y
Adjust
Press PTT.
ANT
[B] (up)
MIC Jack
[C] (down)
Adjust
the AF: 1KHz 1V
it
to
2.0KHz±100Hz.
with
Press [A] to save.
narrowband.
Center frequency.
Radio
Turn to CH8.
Communication
Press PTT.
5. MIC Sensitivity The
radio
operates
LPF: 15KHz
with wideband.
6.
CTCSS
deviation
Center frequency.
AF: 1KHz 24mV
1. Turn to CH9.
Radio
Press PTT.
Communication
The
LPF: 3KHz
nd
Center frequency.
2.
MIC Jack
[B] (up)
deviation
[C] (down) 2.9±0.1KHz.
Adjust
wideband.
Press [A] to save.
ANT
[B] (up)
[C] (down)
operates Test Set
radio
with wideband.
Wideba-
Test Set
Check frequency
ANT
Press
PTT.
Frequency changes to
low frequency.
Adjust
to
deviation
0.70KHz ±
50Hz.
Press [A] to save.
3. Press PTT again,
frequency changes to
high frequency.
Narrow- 4. Press [A] for two
band
seconds. LED flashes
to 0.35KHz±
that
the
50Hz.
operates
with
Press [A] to save.
indicating
radio
Adjust deviation
narrowband.
High frequency.
18
as
5.
Press
PTT.
Frequency changes to
center frequency.
6.
Press
PTT.
Frequency changes to
low frequency.
Wideband
7.
See CTCSS deviation
adjustment.
CDCSS
deviation
Adjust deviation
Turn to CH10.
to 0.70KHz±
Radio
Communication
Test Set
Narrowb See CTCSS deviation
-and
50Hz.
ANT
[B] (up)
Press [A] to save.
[C] (down)
Adjust deviation
LPF: 3KHz
to 0.35KHz±
adjustment.
50Hz.
Press [A] to save.
Turn to CH11.
Adjust deviation
Wideba- See CTCSS deviation
to 3KHz±
nd
adjustment.
8.FFSK
Communication
deviation
Test Set
Narrowband
See CTCSS deviation
0.1KHz.
Radio
ANT
[B] (up)
[C] (down)
LPF: 3KHz
Press [A] to save.
Adjust deviation
to 1.45KHz±
adjustment.
0.05KHz
Press [A] to save.
Turn to CH12.
Adjust it to
Wideba- See CTCSS deviation
nd
adjustment.
9.TONE
Communication
deviation
Test Set
Narrow- See CTCSS deviation
band
10. Low battery
alert level
3KHz±0.1KHz.
Radio
ANT
LPF: 3KHz
voltage to 6.2V.
Press [A] to save.
[C] (down) Adjust
1.45KHz
it
to
±
0.05KHz
adjustment.
Turn to CH15. Adjust
[B] (up)
Press [A] to save.
Digital Voltmeter
Press [A] to save.
Radio
11.VOX
Sensitivity
Communication
Turn to CH16.
Test Set
LPF:15KHz
ANT
MIC Jack
Press [A] to save.
AF:1KHz 3mV
19
Receiver
Item
Measurement
Condition
Test Instrument
1.
Turn
to
Adjustment
Terminal
Part
ANT
[B] (up)
T1
[C] (down)
Specification/
Remarks
Method
CH13.
Press PTT.
Center frequency.
2.
Sensitivity
Press
PTT.
Frequency changes to
Scanner
low frequency.
3.
Press
Adjust the
waveform.
Press [A] to save.
PTT.
Frequency changes to
high frequency.
1.
Turn
to
CH14.
Press PTT.
The
Radio
radio
operates Communication
with wideband.
Wideband
Test Set
Center frequency.
2.
Press
PTT.
MOD: 1KHz
low frequency.
DEV: ±3KHz
Press
PTT.
Frequency changes to
radio
communication
-118dBm
Frequency changes to
3.
Adjust
SSG output:
test
set.
SSG output:
SINAD: 12dB
FILTER:
Press [A] to save.
0.3-3.4KHz
high frequency.
Squelch
4. Press [A] for two
ANT
seconds. LED flashes
Speaker Jack
indicating
radio
that
operates
the
narrowband.
Test Set
High frequency.
Narrowband
5.
Press
SSG output:
PTT.
Frequency changes to
center frequency.
6.
Press
Radio
with Communication
-118dBm
MOD:1KHz
DEV:±1.5KHz
PTT.
Frequency changes to
FILTER:
Adjust
radio
communication
test
set.
SSG output:
SINAD: 12dB
Press [A] to save.
0.3-3.4KHz
low frequency.
20
Disassembly and Assembly for Repair
Disassemble the radio
1. Turn off the radio.
2. Remove the battery: a. Press the release at top of the battery downwards.
b. Separate top of the battery from the radio.
c. Lift the battery off. (See fig.1)
电池推钮
Battery Latch
Fig. 1
3. Remove the antenna.
4. Remove the knob. (See fig.2)
Fig. 2
5. Separate the chassis from PCB:
a. Insert a screwdriver (Material No. 99050312) into the clearance between chassis and
the case.
b. Push the screwdriver downwards to separate the chassis from the case.
c. Lift the bottom of the chassis and pull it out of the PCB. (See fig.3)
Fig.3
21
6. Remove the main PCB:
a. Remove the two screw caps on top of the unit.
b. Remove the five screws between PCB and the chassis.
c. Loosen the weld between antenna pedestal and PCB
using a soldering iron.
d. Lift the PCB off. (See fig.4)
Fig.4
7. Remove the small PCB: Loosen the screw to remove the small PCB. And then loosen
the socket of flexible PCB. (See fig.5)
Fig.5
8. Disassemble PTT key: Push the tab on PTT out of the hole on the case to disassemble
PTT key. (See fig.6)
Fig.6
Assemble the radio
1. Attach PTT: Align the tab on PTT with the corresponding hole on the case.
(See fig.7)
22
Fig.7
2. Assemble the small PCB:
a. Insert the flexible PCB into the socket on the small PCB and lock it up.
b. Insert the bottom of the small PCB into the underside of the two tabs under the
case.
c. Tighten the screws. (See fig.8)
Fig.8
3. Assemble the chassis and PCB
a. Insert the switch shaft in front of the PCB into the corresponding holes on the case.
b. Press the bottom of the chassis downwards until a click is heard. (See fig.9)
Fig.9
4. Attach the battery:
a. Insert the two extensions at the bottom of the battery into the two slots on the case.
b. Press the top of the battery toward the radio until a click is heard. (See fig.10)
Fig.10
Slot
23
Exploded View
24
Packing
Owner ' s Manual
Power Suppl y Cor d
Bel t Cl i p
Bat t er y
Adapt er
St r ap
Char ger
Ant enna
Mai n Uni t
Gi f t Box
25
Specification
Item
Specification
Frequency Range
400~430MHz
Channel Number
16
Channel Spacing
25KHz/12.5KHz
Frequency Stability
±2.5ppm
IF Frequency
44.85MHz/455KHz
Antenna Impedance
50Ω
Speaker Impedance
24Ω
Operation Voltage
7.2V
Operating Temperature
-20~+50ºC
440~470MHz
145~175MHz
Receiver
Sensitivity
0.25uV (Wide)/0.35uV (Narrow)
S/N
45 (Wide) /40dB (Narrow)
Modulation Acceptance
2*7.5KHz/2*3.5KHz
Adjacent Channel Selectivity
70dB (Wide) /60dB (Narrow)
Co-channel Rejection
-8dB (Wide) /-12dB (Narrow)
Blocking
85dB
Spurious Response
70dB
Intermodulation Rejection
65dB
Audio Response
From 6 dB/oct. De-Emphasis. +2dB -6dB
AF Power
500mW
Audio Distortion
5%
Transmitter
Carrier Frequency Error
±2.5ppm
Output Power
4W±0.5 (High)/1W±0.2 (Low)
Modulation Limit
5K (Wide)/2.5K (Narrow)
Adjacent Channel Power
70dB (Wide)/60dB (Narrow)
Modulate Sensitivity
24±3mV
Modulate Distortion
3% (Wide) /5% (Narrow)
Audio Response
From 6dB/oct. Pre-Emphasis ±3dB
Residual Frequency Modulation
45dB (Wide) /40dB (Narrow)
Conducted Spurious Emission
-70dB/-36dBm
Transmit Current
1.6A/0.7A
26

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