Sony EVO-720P - Page 254

8-4-6, Colour Difference Signat Level Adjustment’
(DM-24 Board)
8-4-8. APC Oscillation Free-run Frequency Adjustment
(DM-24 Board)
Mode Stop (Recorder side) Mode Stop (Recorder side)
Signal Color. bar Signal Non-signal
Measurement Point TPOO7 (R-Y) Measurement Point TPO12
Measuring Instrument | Oscilloscope Measuring Instrument | Frequency counter
Adjusting Element RV003 | Adjusting Element CVvo002
Specified Value
0.90+0.05 Vp-p
[ Specified Value
4433618420 Hz
Switch setting :
* Recorder input select switch ++++++++-EXT
Adjusting method :
1) Adjust the R-Y signal level to 0.9040.05 Vp-p
with RVO003,
0,90+0.05 Vp-p
Ge
H
Fig. 8-39. Color difference signal DC level adjustment
8-4-7. Y A-D Input DC Level Adjustment
(DM-24 Board)
Mode Stop (Recorder side)
Signal Color bar
Measurement Point TPOO8 (Y)
Measuring Instrument | Oscilloscope (DC range)
Adjusting Element RVOO5
Specified Value 3,1540.05 Vde
Switch setting :
* Recorder input select switch s--+--EXT
Adjusting method :
1) Adjust the Y signal pedestal level to 3.15 +0.05 Vde
with RVOOS.
3.1520.05 Vde
Vde
Fig.8-40. Y A-D input DC level adjustment
Note: Connect the frequency counter through a
buffer amplifier (oscilloscope, etc.) with a high
input resistor (1 MQ or more) and. low
capacity (10 pF or less).
Connection :
1) Remove the pattern generator from the: recorder
video input terminal, and input no’ signals,
Switch setting:
* Recorder input select switch e+-EXT
Adjusting method :
1) Adjust to 4433618 +20 Hz with CV002.
+
Approx. 0.6 Vp-p
+
4433618220 Hz
Fig. 8-41. APC oscillation free-run frequency
adjustment
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