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ADJUSTMENT
\lignment
Measurement
Adjustment
F
a
-
.
item
Condition
enlists a | Unit | Terminal | Unit | Parts
od
Specifications/Remarks
|. Setting
1) Write in freq' designed with
EEPROM writer.
2) Connect DC 7.5V to the
battery terminal.
Note
1. Measure voltage at
battery terminal.
2. Adjust voltage of power
supply to be 7.5V in
transmitting.
2. PLL lock
1) CH: Channel with highest
| Voltmeter | TX-RX | TP1
vco
|L3
K.M3.7V
ADJ
|+0.2 V, —O4V
voltage
RX FREQ' (Rx)
M2
3.5V
ADJ
| +0.2V
2) PTT : ON
L6
K,M 3.7V
ADJ
|+0.2V,
-O.4V
M2
3.5V
ADJ
|+0.2V
3) CH : Channel with lowest
Check
1.1V or more.
RX FREQ' (fat).
4) CH : Channel with lowest
1.1V of more.
TX FREQ' (ft).
PTT : ON
.
3. Frequency
| 1) CH : Channet with lowest
Freq'
- | ANT
Check FREQ' of TX. | + 400Hz
adjustment
TX FREQ' (ftv).
counter
PTT: ON
Power meter
4. Sensitivity
| 1) CH : Channel with RX center | AFVTVM
SP
TX-RX | L6, 8, | SINAD MAX.
FREQ' (fam).
Oscilloscope
9, 10
See cate
pistornon
80 or 16Q dummy load |
> 500nV/54dBp/-53dBm =| 8Q. dummy
AF VIVM
|
SSG MOD : 1kHz
load
7
SSG DEV : 3kHz
Oscilloscope
}
Distortion meter
|
2) SSG output
0) S64
Check
SINAD 12dB or more.
: 0.28pV/—11dBal
— 118dBm
2
3} CH : Chaeck other channel
° ©
aS
SSG output
: 0.28nV/— 11dBaf—118dBm
5. Squelch
1) CH : Channel with RX center | Oscilloscope
SP
TX-RX
|VR6 | Set to threshold
* adjustment
FREQ' (fram).
Distortion
point.
SSG freq' : frm
meter
SSG output
AFVTVM
: 0.35pV/-9dBp/-116dBm
at 12dB SINAD
MONI : OFF
2) SSG output : 12dB SINAD
Check
Squeich open.
2 0.45nV/-114dBm
at 12DB SINAD
3) SSG output : OFF
Squelch close.
4) MONI : ON
Sound appear.
Note
Close when MONI : OFF.
Do not touch it normally.
Squeich adjust VR6 is adjusted at threshold point.
If it is readjusted the VR6, the squelch sensitivity is changed.
61
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