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14.
Separation Check
Self recording /playback
No signal: Audio input terminal (left)
[right]
1 kHz, -7.5 dBs: Audio input
terminal (right)
[left]
Audio output terminal (left) [right]
Audio level meter
(Use an IHF-A curve audio correction
filter)
Below -27.5 dBs
Note: The [ ] indicates the measuring point during the right
channel check.
Measuring Instrument
Specified Value
Checking method:
1)
Insert a shorting plug into the audio input terminal (left)
[right], and input a 1kHz, —7.5 dBs signal only to the audio
input terminal (right) [left].
2)
Record the signal.
3)
Remove
the input signal,
and
adjust the input/output
switchover switch to [out].
4)
Playback the recorded section.
5)
Check that the cross talk level (1 kHz) of the audio output
terminal (left) [right] is below -27.5 dBs.
15.
Overall Noise Level Check
No signal: Audio output terminal left
and right
Audio output terminal (left) [right]
Audio level meter
(Use an IHF-A curve auditory
correction filter)
Below —65.0 dBs
Note: The [ ] indicates the measuring point during the right
channel check.
Signal
Measuring Instrument
Specified Value
Checking method:
1)
Insert the shorting plug to both left and right of the audio
input terminals.
—
2)
Record.
3)
Remove
the shorting plug, and adjust the input/output
switchover switch to [out].
4)
Playback the recorded section.
5)
Check that the noise level of the audio output terminal (left)
[right] is below —65.0 dBs.
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