Sony DNW-A100 Maintenance Manual page 123

2. Gain Adjustment
1. Connect and set the oscilloscope as follows:
CH-1: TP1/DM-89(E-1), DC 1 V/DIV
GND: E702/DM-89(D-1)
TIME: 10 us/DIV
2. During play back the alignment tape in PLAY mode,
measure level of A on the oscilloscope.
PB portion: Color-bar signal (14:00 to 17:00) of
CR5-1B (NTSC) / CR5-1B PS (PAL)
This measured level A is reference level 100% (0 dB).
3. During play back the alignment tape in the following
playback mode, adjust the level of B on the oscillo-
scope.
PB portion: The same as step 2
NTSC: REW playback
PAL: +24 times speed playback
Adj. point: 1RV507/DM-89(D-4)
Specification (Level in Normal PB is 100% {0 dB}.):
NTSC: B = 100 ± 3 % (0 ± 0.2 dB)
PAL: B = 105 ± 5 % (0.4 ± 0.4 dB)
4. During play back the alignment tape in the following
playback mode, check level of C on the oscilloscope.
PB portion: The same as step 2
NTSC: +24 times speed playback
PAL: REW playback
Specification (Level in Normal PB is 100% {0 dB}.):
C = 100 ± 10 % (0 ± 1.0 dB)
5. Stop the playback of the alignment tape.
n
It is not necessary to eject the alignment tape when
perform subsequent "3-8-17. Guard Band Width
Adjustment".
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
3-8. Analog Betacam PB System Alignment
Specifications for NTSC model
Specification for NTSC model
Playback mode (Level A in normal speed is 100% {0 dB}.)
Adjust: B = 100 ± 3 % (0 ± 0.2 dB)
REW
Check: C = 100 ± 10 % (0 ± 1.0 dB)
+24 times speed
Normal playback
A
(100%)
REW playback +24 times speed play back
B
C
Specifications for PAL model
Specification for PAL model
Playback mode (Level A in normal speed is 100% {0 dB}.)
Adjust: B = 105 ± 5 % (0.4 ±0.4 dB)
+24 times speed
Check: C = 100 ± 10 % (0 ± 1.0 dB)
REW
Normal playback
A
(100%)
+24 times speed play back
B
3-8-16. Search Picture Adjustment
REW playback
C
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