Sony EVO-720P - Audio System Adjustment

8-4-17. External Sync-VD Adjustment (DM-24 Board)
Mode | Stop (Recorder side)
Signal Cofor: bar
. CHL: Pin ® of CNO04
Measurement Point CH2 : TPOIS
Measuring Instrument | Oscilloscope
Adjusting Element RVO16
Specified Value
136.725 usec
Switch setting:
e Recorder input select switch ....... LINE
Adjusting method:
1) Adjust delay to 136.7 £5 ysec with RVO16.
“IIL
f j
wi 136.745 usec
Fig. 8-49, External sync VD adjustment
8-5, AUDIO SYSTEM ADJUSTMENT
«Use a color bar signal as video input signal for
adjusiment.
[Connection of measuring instruments for audio}
In addition to video system’ measuring instruments,
connect the audio system ones as shown in the figure
below and perform adjustment in the VTR mode.
Audio level meter
or distortion meter
Audio
Recorder audio input L and R
VTR
Attenuator /
wel
rp ROOOn
a BEET
600 ale en}
Specified measuring point Be
Fig. 8-50.
8-5-1, PCM Audio System Adjustment
Unless otherwise indicated, set switches to the
following positions for adjustment.
*Moniter audio output select switchs: PCM
* Player audio output select switch PCM
* Recorder input select switch EXT
Input the audio signal to both L and R= input
terminals of the recorder simultaneously,
Note: Adjusting elements for the R channel are
shown in [ J.
{Adjustment procedure]
1) PCM master clock adjustment
2) PCM playback VCO free oscillation frequency
adjustment
3) D-A converter level adjustment
4)NR decode tevel adjustment
5) AD converter offset adjustment
6) E-E output level check
7) PCM recording level adjustment
8) Overall frequency characteristics check
9) Overall distortion check
10) Overall noise level check
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