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0 dBm=0.775 V
Carrier Frequency of each channel
(Frequency intervals are 25 kHz at each channel, but the interval
between 7ch and 8ch is 4.85 MHz)
1ch : 462.5625 MHz
8ch : 467.5625 MHz
2ch : 462.5875 MHz
9ch : 467.5875 MHz
3ch : 462.6125 MHz
10ch : 467.6125 MHz
4ch : 462.6375 MHz
11ch : 467.6375 MHz
5ch : 462.6625 MHz
12ch : 467.6625 MHz
6ch : 462.6875 MHz
13ch : 467.6875 MHz
7ch : 462.7125 MHz
14ch : 467.7125 MHz
PLL Reference Frequency Adjustment
Setting:
RF board
TP (ANT2)
TP (GND)
50 Ω
Procedure:
1. Turn the power ON, and set to 8ch.
2. Set to receive state.
3. Adjust C53 on the RF board so that the frequency counter read-
ing become 467.5625 MHz
Specification Values: 467.56235 to 467.56265 MHz
Adjustment Location: RF board (See page 8)
TX Power Adjustment
Setting:
RF board
TP (ANT2)
TP (GND)
Procedure:
1. Turn the power ON, and set to 8ch.
[TALK]
2. Press the
button (S107) on the MICRO COMPUTER
board continuously and set to transmit state.
3. Adjust RV107 on the MICRO COMPUTER board so that the
power meter reading become 475 mW.
Specification Values: 450 to 500 mW
Adjustment Location: MICRO COMPUTER board (See page 8)
All manuals and user guides at all-guides.com
SECTION 4
ELECTRICAL ADJUSTMENTS
frequency counter
+
–
coaxial cable
power meter
(impedance: 50 Ω )
+
–
coaxial cable
– 7 –
Tone Modulation and Modulation Sensitivity
Adjustments
Setting:
resistor network
AF oscillator
PTT switch
ON: Transmit
OFF: Receive
+
10 µ F
1.6 k Ω
–
600 Ω
level meter
+
–
RF board
TP (ANT2)
Set
MIC jack
RF board
(J102)
TP (GND)
Procedure:
– Tone Modulation Adjustment –
1. Turn the power ON.
[MODE]
2. Press the
button (S105) to set the GROUP talk mode.
[+/–]
3. Press the
button to set GROUP1.
4. Turn the PTT switch ON to set transmit state in no modulate
condition. (AF oscillator: OFF)
5. Adjust RV104 on the MICRO COMPUTER board so that the
modulation meter reading become 0.3 kHz deviation.
Specification Values: 0.27 to 0.33 kHz deviation
– Modulation Sensitivity Adjustment –
6. Turn the AF oscillator and PTT switch ON to apply 1 kHz/0
dBm signal.
7. Adjust RV103 on the MICRO COMPUTER board so that the
modulation meter reading become 2.4 kHz deviation.
Specification Values: 2.3 to 2.5 kHz deviation
8. Turn the AF oscillator OFF.
9. Repeat step 5 to 8 several times.
10. Set the AF oscillator level to –33 dBm, and confirm that the
modulation meter reading is 1.75 kHz deviation.
Specification Values: 1.6 to 1.9 kHz deviation
Note: • Any channel is available.
• Set the L. P. F, H. P. F and etc. on the modulation meter OFF.
Adjustment Location: MICRO COMPUTER board (See page 8)
1000 pF
modulation meter
oscilloscope
(impedance: 50 Ω )
+
+
+
–
–
–
coaxial cable
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