Sony Digital8 DCR-TRV410 Service Manual page 160

7. Overall Noise Level Check
Mode Camera recording and playback
Signal No signal: Insert a shorting plug in the
MIC jack
Measurement Point Audio output terminal left or right
Measuring Instrument Audio level meter
Specified Value Below –45dBs
(IHF-A filter ON, 20kHz LPF ON)
Checking Method:
1) Insert a shorting plug in the MIC jack.
2) Record in the camera mode.
3) Playback the recorded section.
4) Check that the noise level is the specified value.
8. Overall Separation Check
Mode Camera recording and playback
Signal 400Hz, –66dBs signal: MIC jack
<right> [left]
(Connect the MIC jack <left> [right]
to GND)
Measurement Point Audio output terminal <left> [right]
Measuring Instrument Audio level meter
Specified Value Below –40dBs
< > : Left channel check
[ ] : Right channel check
Checking Method:
1) Input the 400Hz, –66dBs signal in the <right> [left] terminal
of the MIC jack only.
2) Record in the camera mode.
3) Playback the recorded section.
4) Check that the signal level of the audio output <left> [right]
terminal is the specified value.
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