Sony GV-D200 Service Manual page 68

7. Overall Noise Level Check
Mode Recording and playback
Signal No signal: Audio terminal left and
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)
Checking Method:
1) Connect the audio terminal left of AUDIO/VIDEO INPUT jack
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.
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
Signal
Measurement Point
Measuring Instrument
Specified Value
< > : Left channel check
[ ] : Right channel check
Checking Method:
1) Connect the audio terminal <left> [right] of AUDIO/VIDEO
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.
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.
6) Remove the jumper wires.
5-33
Recording and playback
No signal: Audio terminal <left>
[right] of AUDIO/VIDEO INPUT
jack
400Hz, –7.5dBs signal: Audio
terminal <right> [left] of AUDIO/
VIDEO INPUT jack
AUDIO OUT jack <LEFT> [RIGHT]
Audio level meter
Below –40dBs