Sony DNW-A100 Maintenance Manual page 116

3-8. Analog Betacam PB System Alignment
3-8-12. PB Frequency Response Adjustment
4. OXIDE Y Adjustment
1. Watch the Y output signal on the analog component
waveform monitor.
n
As the Y output is overlapped the outputs of A channel
and B channel on the component waveform monitor,
adjust/check the level at each channel.
2. During play back the alignment tape in PLAY mode,
measure level at 0.5 MHz (NTSC) / 2T BAR (PAL).
PB portion: Multi-burst signal (3:00 to 6:00) of
CR5-2A (NTSC) / CR5-2A PS (PAL)
This measured level is reference level 100% (0 dB).
3. Restart the playback of alignment tape from the top of
PB portion in PLAY mode.
PB portion: The same as step 2
4. To operate the maintenance mode, press the MENU
button once.
5. Adjust the level at 2 MHz (NTSC) / 3 MHz (PAL).
PB portion: The same as step 2
Adj. points:
A channel: A32 : DM VR 1 : EQ1 OXIDE-Y-A
B channel: A32 : DM VR 1 : EQ1 OXIDE-Y-B
Specifications (A and B channels):
See the table below.
6. To perform the tape operation, press the SET button
once.
7. During play back the alignment tape in PLAY mode,
check each level at the other frequency parts.
PB portion: The same as step 2
Specifications (A and B channels):
See the table below.
8. During play back the alignment tape in PLAY mode,
check the output level difference between A and B
channels at high frequency (4.5 MHz) part.
PB portion: The same as step 2
Specification: It is not noticeable.
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If the output level difference of A and B channels at
4.5 MHz part is noticeable, change the data of "SUB
OXIDE-Y-A" or "SUB OXIDE-Y-B" in A34 : DM
VR 3 as following steps (1) to (8).
(1) To operate the maintenance mode, press the MENU
button once.
(2) To exit A32 : DM VR 1, press the MENU button once.
(3) Enter A34 : DM VR 3.
(4) Change the data of "SUB OXIDE-Y-A" (A channel
side), and judge a lower level channel.
3-80
Specifications for NTSC model
Specification for NTSC model
Frequency (Level at 0.5 MHz is 100% {0 dB}.)
2 MHz Adjust: 100% (104 to 95%) {0
1 MHz Check: 100% (106 to 50%) {0
3 MHz Check: 89% (106 to 50%) {_1.0
4.1 MHz Check: 71% (106 to 50%) {_3.0
0.5 1
100%
Specifications for PAL model
Specification for PAL model
Frequency (Level at 2T BAR is 100% {0 dB}.)
Adjust: 89% (100 to 79%) {_1.0 ±1.0 dB}
3 MHz
0.5 MHz Check: 100% (106 to 50%) {0
1 MHz, 2 MHz
4.1 MHz Check: 71% (106 to 50%) {_3.0
2T BAR 0.5 1
100%
(5) If the B channel side is lower: Return the data of "SUB
OXIDE-Y-A" to the former data, then adjust (add to
the data value) "SUB OXIDE-Y-B" until the level at
4.5 MHz of B channel is equal to the level at 4.5 MHz
of A channel.
If the A channel side is lower: Adjust (add to the data
value) "SUB OXIDE-Y-A" until the level at 4.5 MHz
of A channel is equal to the level at 4.5 MHz of B
channel.
(6) To exit A34 : DM VR 3, press the MENU button once.
(7) Enter A32 : DM VR 1.
(8) To perform the tape operation, press the SET button
+0.3
dB}
_0.4
+0.5
dB}
_6.0
+1.5
dB}
_5.0
+3.5
dB}
_3.0
2 3 4.1 4.5 [MHz]
+0.5
dB}
_6.0
+3.5
dB}
_3.0
2 3 4.1 4.5 [MHz]
DNW-A100/A50/A45
DNW-A100P/A50P/A45P