Overall Noise Level Check; Overall Separation Check - Sony DCR-TRV120 Service Manual

7. Overall Noise Level Check

Mode Camera recording and playback
Signal No signal: Insert a shorting plug in the
MIC jack
Measurement Point Audio left or right terminal of A/V
jack
Measuring Instrument Audio level meter
Specified Value Below –45 dBs
(IHF-A filter ON, 20 kHz 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 400 Hz, –66 dBs signal: MIC jack
<right> [left]
(Connect the MIC jack <left> [right]
to GND)
Measurement Point Audio <left> [right] terminal of A/V
jack
Measuring Instrument Audio level meter
Specified Value Below –40 dBs
< > : Left channel check
[ ] : Right channel check
Checking Method:
1) Input the 400 Hz, –66 dBs 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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