Sony DCR-TRV240 Service Manual page 153

DCR-TRV240/TRV340
7. Overall Noise Level Check
Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
Checking Method:
1) Connect the left terminal of MIC jack and its ground terminal
with a jumper wire.
2) Connect the right terminal of MIC 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.
Recording and playback
No signal: MIC jack left and right
AUDIO/VIDEO jack left or right
Audio level meter
Below –45dBs
(IHF-A filter ON, 20kHz LPF ON)
8. Overall Separation Check
Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
< >: Left channel check
[ ]: Right channel check
Checking Method:
1) Connect the <left> [right] terminal of MIC jack and its ground
terminal with a jumper wire.
2) Input the 400Hz, -66dBs signal in the MIC jack <right> [left].
3) Record the signal.
4) Playback the recorded section.
5) Check that the signal level of the AUDIO/VIDEO jack <left>
[right] is the specified value.
6) Remove the jumper wire.
5-52
Recording and playback
No signal: MIC jack <left> [right]
400Hz, –66dBs signal: MIC jack
<right> [left]
AUDIO/VIDEO jack <left> [right]
Audio level meter
Below –40dBs