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Text excerpt from page 5 (click to view)
SECTION 3 ELECTRICAL ADJUSTMENTS
The set should be connected to a master unit for electrical adjustments (See page 2). Local OSC Adjustment Setting:
ANTENNA jack
oscilloscope main board TP LO
Frame Sync Adjustment Setting: ANT +B switch : ON
oscilloscope ANTENNA main board TP IF2 CH-1 set CH-2
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
main board TP FSYNC
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 ��� (from channel 5A to 13F)
TP IF2
TP FSYNC
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
�1.68000 ms �680.00 us 200 us / div 5.00000 V
A
320.00 us realtime
1 500 mV/ 2 2.00 V /
�1.12500 V
(2) In case of L Band (from channel L1 to L23)
RF SSG ANTENNA jack digital main board voltmeter TP AGC 0.01 µF set
TP IF2
output level : 90 dBm (32 mV) Non-modulation
A
TP FSYNC
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.
