cxa1700aq Sony Electronics, cxa1700aq Datasheet - Page 43

• Manufacturer Part Number: cxa1700aq
• Description: Luminance And Color Signal Processing For 8mm Vcr
• Manufacturer: Sony Electronics

9. Y cross talk cancellation
De-emphasized playback Y signal is input to the comb block. By passing the differential component of the
nH signal and the (n+1)H signal through the limiter, the cross talk component, which is line noncorrelation,
is extracted. Cross talk cancellation is accomplished by subtracting this cross talk component from the nH
playback Y signal.
In addition, by switching mode CFL1 and CFL2, the comb depth characteristics of PBY cross talk
cancellation can be changed . The standard characteristics of comb depth for low frequency
(approximately 1MHz) and insignificant input level (MAIN EMPH TC (Pin 3) 7.9mVp-p = –30dB) input are
shown below.
Playback Y
64ƒ
H
CFL2
+ +
High
Low
23
C comb
CFL1
DL IN1
CCD
TRAP
+
Playback C
–1.5dB
–
–10dB
High
—43—
CLAMP2
LIM
EQ
65ƒ
LPF
H
DOC
TRAP
–6dB
Low
+
0dB
ATT
–
VCA2
EQ
CFL1
CFL2
ƒ
19
DL OUT2
OUT
PB Y Comb Depth
CXA1700AQ/AR