6-6
2-5-3. Overall Output Level and Distortion Factor
Check
Mode
Self-record playback
Signal
400Hz, –7.5dBs : CJ570
Measurement point
CJ570
Measuring instrument
Audio level meter and Distortion
meter
Specified value
Playback Level: –7.5 ± 3dBs
Distortion: 4.0% or less
[Check Method]
1)
Input signal of 400Hz and –7.5dBs to the audio input.
2)
Record signal.
3)
Playback the recorded portion.
4)
Check that the output level is –7.5 ± 3dBs.
5)
Check that the distortion factor is 4.0% or less.
2-5-4. Overall Noise Level Check
Mode
Self-record playback
Signal
No signal (Insert a shorting plug into
the Audio LINE IN terminal)
Measurement point
CJ570
Measuring instrument
Audio level meter
Specified value
– 45.5dBs or less
[Check Method]
1)
Record.
2)
Playback recorded portion.
3)
Check that noise level is – 45.5dBs or less.
2-6.
TUNER SYSTEM ADJUSTMENT
2-6-1. Separation Adjustment (MA-327 Board)
Mode
E-E
Signal
RF signal
Video : Color bar
white (100%) modulation
Audio : L: 400Hz, R: 2kHz
30% modulation
Electrical field:
60-80dBm/75
Ω
terminated
Measuring instrument
Audio level meter
Measuring point
LINE OUT L
Adjusting element
RV731
Specified value
2kHz component minimum
[Adjustment Method]
1)
Connect an audio level meter to LINE OUT L channel via HPF.
2)
Feed the RF signal from RF IN terminal.
3)
Adjust with RV731 so that the output level satisfies the specified
value.
Содержание RMT-V231B
Страница 9: ...1 2 ...
Страница 10: ...1 3 ...
Страница 11: ...1 4 ...
Страница 12: ...1 5 ...
Страница 13: ...1 6 ...
Страница 14: ...1 7 ...
Страница 15: ...1 8 ...
Страница 16: ...1 9 ...
Страница 17: ...1 10 ...
Страница 18: ...1 11 ...
Страница 19: ...1 12 ...
Страница 20: ...1 13 ...
Страница 21: ...1 14 ...
Страница 22: ...1 15 ...
Страница 23: ...1 16 ...
Страница 24: ...1 17 ...
Страница 25: ...1 18 ...
Страница 26: ...1 19 ...
Страница 27: ...1 20E ...