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1-2. Electrical Alignment
1-2-5. Video Level Adjustment (525 mode)
1. When the APR-30 board is installed in the DSM-T1
n
When A/D converter IC (IC304) or its peripheral parts (RV300, 301, IC300 to 303, etc.) on the APR-30
board is replaced, this adjustment is required.
If the following equipment (or the equivalent) are not available, replace the APR-30 mounted circuit
board itself.
Measuring Equipment
. Digital Satellite Demodulator, DSM-R1
. Analog Output Board, BKSM-R103
. Synthesized signal generator (HP 8648B)
. Mixer (ZAD-11)
. Composite video signal generator (TSG-170A)
. Waveform monitor/vector scope (1780R)
Connection
Composite video
signal generator
Synthesized signal
BLACK BURST
generator
COLOR BARS
RF OUT
DSM-T1Mixer
DSM-R1
L
(IN1 side)VIDEO INI
R
BKSM-R103
L-BAND
REF IN
BKSM-T103IN
IF OUT
BNC to F adaptor
VIDEO OUT
Waveform monitor/
vector scope
A
75Z
BKSM-T1031-11 (E) |