Overall Level Characteristics Check; Overall Distortion Check; Overall Noise Level Check - Sony DCR-IP45 Service Manual

1. Overall Level Characteristics Check

Mode Recording and playback
Signal 400Hz, –7.5dBs signal:
AUDIO L and AUDIO R terminal of
A/V jack
Measurement Point AUDIO L and AUDIO R terminal of
A/V jack
Measuring Instrument Audio level meter
–7.5 ± 1.0dBs
Specified Value
Checking Method:
1) Input the 400Hz, –7.5dBs signal in the AUDIO L and AUDIO
R terminal.
2) Record in the signal.
3) Playback the recorded section.
4) Check that the 400Hz signal level is the specified value.

2. Overall Distortion Check

Mode Recording and playback
Signal 400Hz, –7.5dBs signal:
AUDIO L and AUDIO R terminal of
A/V jack
Measurement Point AUDIO L and AUDIO R terminal of
A/V jack
Measuring Instrument Audio distortion meter
Specified Value Below 0.4%
(200Hz to 6kHz BPF ON)
Checking Method:
1) Input the 400Hz, –7.5dBs signal in the AUDIO L and AUDIO
R terminal.
2) Record in the signal.
3) Playback the recorded section.
4) Check that the distortion is the specified value.
DCR-IP45/IP45E/IP55/IP55E

3. Overall Noise Level Check

Mode
Signal
Measurement Point
Measuring Instrument
Specified Value
Checking Method:
1) Insert shorting plugs in each of AUDIO L and AUDIO R
terminal.
2) Record in the signal.
3) Remove the shorting plugs.
4) Playback the recorded section.
5) Check that the noise level is the specified value.
5-61
Recording and playback
No signal:
AUDIO L and AUDIO R terminal of
A/V jack
AUDIO L and AUDIO R terminal of
A/V jack
Audio level meter
Below –45dBs
(IHF-A filter ON, 20kHz LPF ON)