cxa1700aq Sony Electronics, cxa1700aq Datasheet - Page 28
cxa1700aq
Manufacturer Part Number
cxa1700aq
Description
Luminance And Color Signal Processing For 8mm Vcr
Manufacturer
Sony Electronics
Datasheet
1.CXA1700AQ.pdf
(51 pages)
- Current page: 28 of 51
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(2) DDS measurement
(3) Measurement of gain difference between PB ACC channels
SG26 (Pin 26 DDS/MASK input)
SG30 (Pin 30 VIN1 input)
SG31 (Pin 31 RECL/JVD input)
P34 (Pin 34 Y OUT) output
When a pulse with the following timing is input, the output from P34 (Pin 34 Y OUT) becomes as shown
below; measures each DC differential.
The ACC amplifier in the CXA1700 has a built-in 4-channel time constants, and those time constants can
be switched by SWP (Pin 46) input. In addition, in NTSC playback chroma signal processing, PI return
occurs in the SWP (Pin 46) input for Low interval. In this measurement, the signal k, that is phase-inverted
each 1H, is input to PBC IN (Pin 45) for the Low interval of SWP; the continuous wave of the signal is
input for the High interval of SWP.
In this case, measure each channel level V
the gain difference between channels using the following equations:
G
G
G
CH12
CH13
CH14
=
=
=
V
V
V
V
V
V
Pedestal level reference
2
1
3
1
4
1
V
VOB
1
, V
—28—
2
, V
V
VOW
3
,and V
4
of output P63 (Pin 63 C OUT) and calculate
V
JOGV
3V
0V
5V
0V
1.5V
Sync tip level reference
357mV
143mV
CXA1700AQ/AR
100% white
Y signal
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