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The set should be connected to a master unit for electrical
adjustments (See page 2).
Local OSC Adjustment
Setting:
oscilloscope
main board
TP LO
Procedure:
1. Adjust T102 so as to maximize the peak of waveform at 35.84
MHz.
Adjustment Location: See page 6.
IF2 Output Gain Adjustment
Setting:
digital
voltmeter
main board
TP LEL
Procedure:
1. Adjust RV101 so that the reading on digital voltmeter is 2.25 V.
Adjustment Location: See page 6.
AGC Adjustment
Setting:
ANT +B switch : OFF
ANTENNA jack
RF SSG
0.01 µ F
output level : 90 dBm (32 mV)
Non-modulation
Procedure:
1. Set the carrier frequency of RF SSG to 225.648 MHz.
2. Receive the channel 12B (225.648 MHz).
3. Adjust RV102 so that the reading on digital voltmeter is 3.1 ±
0.5 V.
4. Set the carrier frequency of RF SSG to 1471.792 MHz.
5. Receive the channel L12 (1471.792 MHz).
6. Adjust RV103 so that the reading on digital voltmeter is 3.2 ±
0.5 V.
Adjustment Location: See page 6.
SECTION 3
ELECTRICAL ADJUSTMENTS
digital
main board
voltmeter
TP AGC
set
Frame Sync Adjustment
Setting:
ANT +B switch : ON
ANTENNA jack
ANTENNA
set
Procedure:
1. Receive the DAB signal.
2. Adjust RV104 so that the rising edge of waveform of TP FSYNC
is positioned A.
(1) In case of Band ΙΙΙ (from channel 5A to 13F)
–1.68000 ms
200 us / div
1
2
500 mV/
2.00 V /
–1.12500 V
5.00000 V
(2) In case of L Band (from channel L1 to L23)
–370.00 us
50.0 us / div
1
2
500 mV/
2.00 V /
125.000 mV
3.00000 V
Adjustment Location: See page 6.
– 5 –
oscilloscope
main board
TP IF2
CH-1 CH-2
main board
TP FSYNC
A
–680.00 us
320.00 us
realtime
A
–120.00 us
130.00 us
realtime
TP
IF2
TP
FSYNC
TP
IF2
TP
FSYNC
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