– 6 –
0 dB=1 µV
Note: As a front-end (FE1) is difficult to repair if faulty, replace it with
new one.
AM Section Adjustment
Setting:
AM Tuned Level Adjustment
Band: AM or MW
Procedure:
1. Set the output of SSG so that the input level of the set be-
comes 55 dBµ/m.
2. Tune the set to 999 kHz or 1,000 kHz.
3. Adjust RV1 to the point (moment) when the TUNED indica-
tor will change from going off to going on.
Adjustment Location : MAIN board
FM Section Adjustment
Note: This adjustment should be performed after the AM Tuned Level
Adjustment due to the same adjustment element.
Setting:
FM Tuned Level Adjustment
Band: FM
Procedure:
1. Supply a 26 dBµ 98 MHz signal from the ANTENNA termi-
nal.
2. Tune the set to 98 MHz.
3. If the TUNED indicator does not light, adjust RV2 to the point
(moment) when the TUNED indicator will change from going
off to going on.
Adjustment Location: MAIN board
SECTION 4
ELECTRICAL ADJUSTMENTS
AM RF SSG
loop antenna
set
loop antenna
(Supplied accessories)
60 cm
AM ANTENNA
terminal
30% amplitude
modulation by
400 Hz signal
Carrier frequency: 999 kHz (at 9 k step)
1,000 kHz (at 10 k step)
Output level : 25 dB
Field strength dB (
µ
V/m) =SSG output level dB (
µ
V/m) –26 dB.
Carrier frequency: 98 MHz
Modulation : AUDIO 1 kH, 75 kHz
deviation (100%)
Output level : 26 dB
µ
(17.8
µ
V)
FM ANTENNA termina
(75
Ω
open)
75
Ω
coaxial
set
FM RF stereo signal
generator
RV1
IC1
FE1
RV2
Adjustment Location:
[MAIN BOARD] (Component Side)
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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