6-60
HVR-M25J/M25U/M25N/M25E/M25P/M25C
3.
E-E Level Check
(1) –10dB Check
Mode
E-E
Signal
Audio: 1 kHz, –2 dBs signal (NTSC)
1 kHz, –4 dBs signal (PAL)
AUDIO IN terminal (CH-1, 2)
Measurement Point
AUDIO OUT terminal (CH-1, 2)
Measuring instrument
Audio level meter
Oscilloscope
Specified Value
At max. REC LEVEL:
+8 to +12 dBs (NTSC)
+6 to +10 dBs (PAL)
At min. REC LEVEL:
No signal is present.
At –12 dB REC LEVEL:
–4 to 0 dBs (NTSC)
–6 to –2 dBs (PAL)
Control knob position:
±
30 deg. of center
Note 1:
0 dBs = 0.775 Vrms
Switch setting
1) AUDIO MODE (AUDIO SET menu) ......................... FS48K
2) STATUS CHECK button .......................... Audio Level meter
3) AUDIO INPUT LEVEL switch ....................................... –10
Checking method:
1) Enter 1 kHz, –2 dBs (NTSC) or –4 dBs (PAL) signal to the
AUDIO IN terminal (CH-1).
2) Check that the output of AUDIO OUT terminal (CH-1) satis-
fies the specified value, when the AUDIO REC LEVEL con-
trol knob (CH-1) on the front panel is in the maximum posi-
tion.
3) Check with the oscilloscope that no clip is found in the output
waveform.
4) Check that the output of AUDIO OUT terminal (CH-1) satis-
fies the specified value, when the AUDIO REC LEVEL con-
trol knob (CH-1) is in the minimum position.
5) Press the “STATUS CHECK” button on the front panel to dis-
play the audio level meter on LCD monitor.
6) Adjust the AUDIO REC LEVEL control knob (CH-1) so that
the audio level meter on CH-1 displays “–12”.
Note 2:
Unless otherwise specified, do not rotate the
AUDIO REC LEVEL control knob, as other
checking items use this setting (rotation angle)
of the AUDIO REC LEVEL control knob.
7) Check at this time that the control knob position and AUDIO
OUT terminal (CH-1) output satisfy the specified values.
8) Check with the oscilloscope that no clip is found in the output
waveform.
9) For the CH-2, make a checking in the same manner.
(2) –2dB Check
Mode
E-E
Signal
Audio: 1 kHz, +6 dBs signal (NTSC)
1 kHz, +4 dBs signal (PAL)
AUDIO IN terminal (CH-1, 2)
Measurement Point
AUDIO OUT terminal (CH-1, 2)
Measuring instrument
Audio level meter
Oscilloscope
Specified Value
–4 to 0 dBs (NTSC)
–6 to –2 dBs (PAL)
Note:
0 dBs = 0.775 Vrms
Switch setting
1) AUDIO MODE (AUDIO SET menu) ........................ FS48K
2) AUDIO INPUT LEVEL switch ........................................ –2
3) AUDIO REC LEVEL control knob
........... The position at –10 dB Check of E-E Level Check
Checking method:
1) Enter 1 kHz, +6 dBs (NTSC) or +4 dBs (PAL) signal to the
AUDIO IN terminal (CH-1).
2) Check that the output of AUDIO OUT terminal (CH-1) satis-
fies the specified value.
3) Check with the oscilloscope that no clip is found in the output
waveform.
4) For the CH-2, make a checking in the same manner.
(3) +4dB Check
Mode
E-E
Signal
Audio: 1 kHz, +12 dBs signal (NTSC)
1 kHz, +10 dBs signal (PAL)
AUDIO IN terminal (CH-1, 2)
Measurement Point
AUDIO OUT terminal (CH-1, 2)
Measuring instrument
Audio level meter
Oscilloscope
Specified Value
–4 to 0 dBs (NTSC)
–6 to –2 dBs (PAL)
Note :
0 dBs = 0.775 Vrms
Switch setting
1) AUDIO MODE (AUDIO SET menu) ........................ FS48K
2) AUDIO INPUT LEVEL switch ........................................ +4
3) AUDIO REC LEVEL control knob
........... The position at –10 dB Check of E-E Level Check
Checking method:
1) Enter 1 kHz, +12 dBs (NTSC) or +10 dBs (PAL) signal to the
AUDIO IN terminal (CH-1).
2) Check that the output of AUDIO OUT terminal (CH-1) satis-
fies the specified value.
3) Check with the oscilloscope that no clip is found in the output
waveform.
4) For the CH-2, make a checking in the same manner.
