1-2. Electrical Alignment
1-2-2. Video Level Adjustment (625 mode)
1. When the APR-31 board is installed in the DSM-R1
n
When D/A converter IC (IC605) or its peripheral parts (RV600, RV601, IC601, IC602, IC606 to 608,
etc.) on the APR-31 board is replaced, this adjustment is required.
If the following equipment (or the equivalent) are not available, replace the APR-31 mounted curcuit
board itself.
Measuring Equipment
. Digital Satellite Modulator, DSM-T1
. Analog Input Board, BKSM-T103
. Synthesized signal generator (HP 8648B)
. Mixer (ZAD-11)
. Composite video signal generator (TSG-271)
. Waveform monitor /vector scope (1781R)
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-R1031-3 (E) |