Sony HVR-M15J Service Manual page 151

2. Audio Test Signal Level Check
Mode
Signal
Measurement Point
Measuring instrument
Specified Value
Note 1: 0 dBs = 0.775 Vrms
Switch setting
1) COLOR BAR (IN/OUT REC menu) ................. ON [TONE]
Checking method:
1) Set the 60i/50i SEL (OTHERS menu) to "60i".
2) Check that the output of AUDIO OUT terminal (CH-1, 2) sat-
isfies the specified value.
3) Check with the oscilloscope that no clip is found in the output
waveform.
4) Set the 60i/50i SEL (OTHERS menu) to "50i".
5) Check that the output of AUDIO OUT terminal (CH-1, 2) sat-
isfies the specified value.
6) Check with the oscilloscope that no clip is found in the output
waveform.
7) Set the 60i/50i SEL (OTHERS menu) to "50i" or "60i".
Note 2: 60i: HVR-M15J/M15U/M15N
50i: HVR-M15E/M15P/M15C
HVR-M15J/M15U/M15N/M15E/M15P/M15C
E-E
Audio test signal
AUDIO OUT terminal (CH-1, 2)
Audio level meter
Oscilloscope
–11 to –8.5 dBs
3. E-E Level Check
Mode
Signal
Measurement Point
Measuring instrument
Specified Value
Note: 0 dBs = 0.775 Vrms
Switch setting
1) AUDIO MODE (AUDIO SET menu) ......................... FS48K
Checking method:
1) Enter 1 kHz, –4 dBs signal to the AUDIO IN terminal (CH-1,
2).
2) Set the AUDIO REC LV (AUDIO SET menu) to "0 db". (REC
LEVEL: 0 dB)
3) Check that the output of AUDIO OUT terminal (CH-1, 2) sat-
isfies the specified value.
4) Check with the oscilloscope that no clip is found in the output
waveform.
5) Set the AUDIO REC LV (AUDIO SET menu) to "–6 db". (REC
LEVEL: –6 dB)
6) Check that the output of AUDIO OUT terminal (CH-1, 2) sat-
isfies the specified value.
7) Set the AUDIO REC LV (AUDIO SET menu) to "+6 db". (REC
LEVEL: +6 dB)
8) Check that the output of AUDIO OUT terminal (CH-1, 2) sat-
isfies the specified value.
6-57
E-E
Audio: 1 kHz, –4 dBs signal
AUDIO IN terminal (CH-1, 2)
AUDIO OUT terminal (CH-1, 2)
Audio level meter
Oscilloscope
REC LEVEL: 0 dB
–8 to –4 dBs
REC LEVEL: –6 dB
–7 to –5 dB
from the REC LEVEL: 0 dB
REC LEVEL: +6 dB
+5 to +7 dB
from the REC LEVEL: 0 dB