Overall Noise Level Check - Sony GV-D300 Service Manual

4. Overall Noise Level Check

Mode Recording and playback
Signal No signal: Insert a shorting plug in the
AUDIO jack left and right
Measurement Point AUDIO jack 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 AUDIO jack left and right.
2) Record in the signal.
3) Playback the recorded section.
4) Check that the noise level is the specified value.
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