5-31
3-7.
AUDIO SYSTEM ADJUSTMENTS
[Connecting the measuring instruments for the audio]
Connect the audio system measuring instruments in addition to the
video system measuring instruments as shown in Fig. 5-3-18.
[Adjustment Procedure]
1)
Hi8/Standard8 AFM BPF fo adjustment
2)
Hi8/Standard8 AFM 1.5MHz deviation adjustment
3)
Hi8/Standard8 AFM 1.7MHz deviation adjustment
4)
Digital8 playback level check
5)
Overall level characteristics check
6)
Overall distortion check
7)
Overall noise level check
8)
Overall separation check
1. Hi8/Standard8 AFM BPF fo Adjustment
(VC-250 board)
Sets the BPF passing frequency of IC760 so that the AFM signal
can separate from the playback RF signal properly. If deviated. the
mono/stereo mode will be differentiated incorrectly, and noises and
distortions will increase during high volume playback.
Mode
Playback
Signal
Hi8/Standard8 alignment tape:
For BPF adjustment
(WR5-11NS (NTSC))
(WR5-11CS (PAL))
Measurement Point
AUDIO OUT jack LEFT or RIGHT
Measuring Instrument
Distortion meter
Adjustment Page
F
Adjustment Address
7D
Specified Value
The Main and Sub channel distortion
rate should be almost the same
(within ± 1%) and minimum.
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2)
Set the Hi-Fi SOUND switch (menu display) to “2”.
3)
Select page: F, address: 7D, change the data and minimize the
distortion rate.
4)
Press the PAUSE button.
5)
Set the Hi-Fi SOUND switch (menu display) to “1”.
6)
Select page: F, address: 7D, change the data and minimize the
distortion rate.
7)
Press the PAUSE button.
8)
Repeat steps 2) to 7) and set the data of address: 7D so that the
distortions rates when the Hi-Fi SOUND switch is set to “2”
and set to “1” respectively are almost the same and minimum.
9)
Press the PAUSE button.
10) Select page: 0, address: 01, and set data: 00.
11) Set the Hi-Fi SOUND switch to “STEREO”.
Fig. 5-3-18.
VIDEO OUT
(75
Ω
)
Pattern generator
AUDIO/VIDEO
INPUT
Main Unit
Audio generator
Attenuator
600
Ω
600
Ω
: 270
Ω
(1-249-410-11) + 330
Ω
(1-249-411-11)
AUDIO
LEFT
(White)
AUDIO
RIGHT
(RED)
VIDEO
(Yellow)
Recording
L
R
AUDIO OUT
VIDEO OUT
Main unit
Monitor TV
47k
Ω
47k
Ω
47k
Ω
(1-249-437-11)
Audio level meter
or distortion meter
Playback
Содержание GV-D200E
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Страница 56: ...GV D200 D200E D800 D800E 4 9 REC PB AMP DAC DV I F Y C PROCESSOR LINE SERVO MECHA HI CONT D D CONV VC 250 ...
Страница 160: ...GV D200 D200E D800 D800E 206 9 929 853 11 Sony EMCS Co 2003F1600 1 2003 6 Published by DI CS Strategy Div ...
Страница 165: ... 8 GV D200 D200E D800 D800E Sony EMCS Co 2002C1600 1 2002 3 Published by DI Customer Center 9 929 853 81 ...