Read Sony GV-D200 Service Manual online
5-33
7. Overall Noise Level Check
Mode
Recording and playback
Signal
No signal: Audio terminal left and
right of AUDIO/VIDEO INPUT jack
right of AUDIO/VIDEO INPUT jack
Measurement Point
AUDIO OUT jack LEFT or RIGHT
Measuring Instrument
Audio level meter
Specified Value
Below –45dBs
(IHF-A filter ON, 20kHz LPF ON)
(IHF-A filter ON, 20kHz LPF ON)
Checking Method:
1)
1)
Connect the audio terminal left of AUDIO/VIDEO INPUT jack
and its ground terminal with a jumper wire.
and its ground terminal with a jumper wire.
2)
Connect the audio terminal right of AUDIO/VIDEO INPUT
jack and its ground terminal with a jumper wire.
jack and its ground terminal with a jumper wire.
3)
Record the signal.
4)
Playback the recorded section.
5)
Check that the noise level is the specified value.
6)
Remove the jumper wires.
8. Overall Separation Check
Mode
Recording and playback
Signal
No signal: Audio terminal <left>
[right] of AUDIO/VIDEO INPUT
jack
400Hz, –7.5dBs signal: Audio
terminal <right> [left] of AUDIO/
VIDEO INPUT jack
[right] of AUDIO/VIDEO INPUT
jack
400Hz, –7.5dBs signal: Audio
terminal <right> [left] of AUDIO/
VIDEO INPUT jack
Measurement Point
AUDIO OUT jack <LEFT> [RIGHT]
Measuring Instrument
Audio level meter
Specified Value
Below –40dBs
< > : Left channel check
[ ] : Right channel check
[ ] : Right channel check
Checking Method:
1)
1)
Connect the audio terminal <left> [right] of AUDIO/VIDEO
INPUT jack and its ground terminal with a jumper wire.
INPUT jack and its ground terminal with a jumper wire.
2)
Input the 400Hz, –7.5dBs signal in the audio terminal <right>
[left] of AUDIO/VIDEO INPUT jack.
[left] of AUDIO/VIDEO INPUT jack.
3)
Record the signal.
4)
Playback the recorded section.
5)
Check that the signal level of the AUDIO OUT <LEFT>
[RIGHT] jack is the specified value.
[RIGHT] jack is the specified value.
6)
Remove the jumper wires.
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