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Adjustment
Test
Items
Mode
(A
Battery Low
)
Confirmation
(B
TX VCO
)
Voltage
(C
RX VCO
)
Confirmation
(D
TX Frequency
)
Adjustment
(E
TX Power
)
Adjustment
(F) RX
Sensitivity
Confirmation
(2nd IF
output)
(G
Noise
)
Squelch
Confirmation
(H
Speaker
)
Output Level
confirmation
(I) Mic
Modulation
Factor
Confirmation
(J) Data
Modulation
Confirmation
The connections of adjustment equipment are as shown in
SSG Frequency: 46.670 MHz
9.4. Adjustment Standard (Handset)
(Component View)
Note: (A) - (I) is refered to
Adjustment
Point
1. Adjust the power supply voltage to DC3.60V,and confirm so that the reading of
3ch
-
oscillosope is High.
Talk
2. Adjust that power supply voltage to DC 3.40V, and confirm so that the reading of
oscilloscope is Low.
1. Adjust T6 so that the reading of the Digital Voltmeter is 1.5V ± 0.1V.
3ch
T6
Talk
1. Set S2 to RX VCO side.
3ch
-
2. Adjust T801 so that the reading of the Digital Voltmeter is 1.65V ± 0.85V.
Talk
(After adjusting, set S2 to OFF).
-
3ch
VC1
Talk
-
3ch
T5
Talk
1. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev. 0KHz).
3ch
T3
2. Confirm 2nd IF output so that the reading of RF VTVM is more than 15mV.
Talk
1. ...Measure the SSG output level when the noise squelch changes from Low to
3ch
-
High. (modulation frequency 1KHz, dev.3kHz)
Talk
2. Confirm that the SSG output level is -105dBm.
1. Apply -60dBm output from S.S.G. (modulation frequency 1KHz, dev. 3KHz).
3ch
-
2. Confirm that SP output level is 100mV ± 20mV.
Talk
(distortion: less than 7%) (volume High).
1. Apply a MIC signal (1KHz, 12mV at 600
3ch
-
2. Confirmation so that the reading FM Deviation Meter is 3.1KHz ± 0.4KHz.
Talk
-
3ch
-
Talk
ADJUSTMENTS (HANDSET)
Confirm so that the reading of the frequency counter is 49.860MHz ± 0.1KHz.
Output level should be over 2.5mW ± 0.5mW on RF VTVM (50
Confirm for 5KHz ± 1KHz FM Deviation Meter reading.
Adjustment Standard (Handset)
()
26
Procedure
load).
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