Sony DVCAM DSR-25, Service Manual, Page: 192 / 238

5-67
DSR-25
1. Playing Level Check
Mode PLAY
Signal Alignment tape: For audio check
(NTSC: XH5-3/PAL: XH5-3P)
Measurement Point AUDIO OUTPUT terminal
(CH-1, 2)
Measuring instrument Audio level meter
Oscilloscope
Specified Value 32 kHz mode section:
1 kHz signal must be outputted.
48 kHz mode section:
1 kHz signal level is +4 to +8
dBV.
44.1 kHz mode EMP ON section:
7.35 kHz signal level is –2 to +2
dBV.
44.1 kHz mode EMP OFF section:
7.35 kHz signal level is +4 to +8
dBV.
Note:
0 dBV = 1 Vrms
Checking method:
1)
Check that the play signal level satisfies the specified value.
2) Check with the oscilloscope that no clip is found in the output
waveform.
2. E-E Level Check
(1) –10dB Check
Mode STOP
Signal Audio: 1 kHz, –6 dBs signal
AUDIO INPUT terminal
(CH-1, 2)
Measurement Point AUDIO OUTPUT terminal
(CH-1, 2)
Measuring instrument Audio level meter
Specified Value AUDIO OUTPUT terminal
CH1: –12 to –8 dBV
CH2: –12 to –8 dBV
LCD monitor display
“–22” or “–20” or “–18”
Note 1:
0 dBV = 1 Vrms
Note 2:
0 dBs = 0.775 Vrms
Switch setting
INPUT LEVEL select switch .......................... –10
Menu setting (AUDIO SET menu)
AUDIO MODE ................................................ FS32K
Checking method:
1) Enter 1 kHz, –6 dBs signal to the AUDIO INPUT terminal
(CH-1, 2).
2) Check that the output of AUDIO OUTPUT terminal (CH-1, 2)
satisfies the specified value.
3) Check that the audio level indication on the LCD monitor shows
“–22”, “–20” or “–18”.
(2) –2dB Check
Mode STOP
Signal Audio: 1 kHz, +2 dBs signal
AUDIO INPUT terminal
(CH-1, 2)
Measurement Point AUDIO OUTPUT terminal
(CH-1, 2)
Measuring instrument Audio level meter
Specified Value AUDIO OUTPUT terminal
CH1: –12 to –8 dBV
CH2: –12 to –8 dBV
LCD monitor display
“–22” or “–20” or “–18”
Note 1: 0 dBV = 1 Vrms
Note 2: 0 dBs = 0.775 Vrms
Switch setting
INPUT LEVEL select switch .......................... –10
Menu setting (AUDIO SET menu)
AUDIO MODE ................................................ FS32K
Checking method:
1)
Enter 1 kHz, +2 dBs signal to the AUDIO INPUT terminal
(CH-1, 2).
2) Check that the output of AUDIO OUTPUT terminal (CH-1, 2)
satisfies the specified value.
3) Check that the audio level indication on the LCD monitor shows
“–22”, “–20” or “–18”.