參數(shù)資料
型號(hào)： LA71205M
廠商： SANYO SEMICONDUCTOR CO LTD
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP80
封裝： 14 X 14 MM, QFP-80
文件頁(yè)數(shù)： 17/19頁(yè)
文件大小： 436K
代理商： LA71205M
LA71205M
No.A0219-7/29
REC Mode Chroma
Ratings
Parameter
Symbol
In
Out
Conditions
min
typ
max
Unit
REC chroma low
frequency conversion
output level
VOR-46
T32A
T46
With VIN the standard color bar signal (1Vp-p), measure the
burst level on T46.
290
350
410 mVp-p
Burst emphasis
GBE
T32A
T46
With VIN the standard color bar signal (1Vp-p), calculate the
ratio of the T46 burst levels for SP/EP and LP modes.
5.5
6.0
6.5
dB
VXO oscillation
level
VVXO-RN
T32A
T50
With VIN the standard color bar signal (1Vp-p), measure the
T50 output amplitude with an FET probe.
290
430
690 mVp-p
REC ACC
characteristics (1)
ACCR1
T32A
T46
With VIN the standard color bar signal (1Vp-p), increase only
the chroma signal level by +6dB, measure the T46 burst
level, and calculate its ratio with VOR-46.
+0.2
+0.5
dB
REC ACC
characteristics (2)
ACCR2
T32A
T46
With VIN the standard color bar signal (1Vp-p), decrease only
the chroma signal level by -6dB, measure the T46 burst level,
and calculate its ratio with VOR-46.
-0.5
-0.1
dB
REC ACC killer-on
input level
VACCK-ON T32A
T46
With VIN the standard color bar signal (1Vp-p), decrease the
chroma signal and measure the input burst level at the point
that T46 output ceases.
Calculate the ratio of this value with the standard input level.
-26
dB
REC ACC killer-on
output level
V0ACCK
T32A
T46
Measure the T46 output level with a spectrum analyzer in the
killer state of the above item and calculate its ratio with
VOR-46.
-60
-50
dB
REC ACC killer
restored input level
VACCK-OFF T32A
T46
From the killer state of the above item gradually increase the
input chroma level and T46 output reappears.
Calculate its ratio with the standard input level.
-20
dB
REC APC pull-in
range (1)
fNAPC1
T32A
T46
Input a signal consisting of a 3.5795MHz CW added to a 50%
white signal. After confirming that a signal is output from T46,
increase the CW frequency until T46 output ceases.
Now slowly reduce the CW frequency, and let f1 be the
frequency at which T46 output reappears.
fAPC1 = f1-3579545 (Hz)
350
Hz
REC APC pull-in
range (2)
fAPC2
T32A
T46
As in the previous item, decrease the CW frequency until T46
output ceases.
Now slowly increase the CW frequency and let f2 be the
frequency at which T46 output reappears.
fAPC2 = f2-3579545 (Hz)
-350
Hz
REC AFC pull-in
range (1)
fAFC1
T32A
T48
Input a 300mVp-p,15.7kHz,5
s width pulse train (negative
polarity).
After increasing the pulse train frequency until the T48 wave
form is disrupted, decrease the frequency until the T48 wave
form returns to normal and let f1 be that frequency.
fAFC1 = f1-15.734 (kHz)
1.0
kHz
REC AFC pull-in
range (2)
fAFC2
T32A
T48
With the initial conditions of the previous item, decrease the
pulse train frequency until the output is disrupted, then
increase the frequency until the output returns to normal, and
let f2 be that frequency.
fAFC2 = f2-15.734 (kHz)
-1.0
kHz
The ratio of the REC
chroma level and FM
modulator output
level
C/FM2
T32
T69
The ratio of 100% chroma’s level which was converted to low
band and FM modulator output level.
(When Y/C Mix Ratio: FM -1.0dB)
-4.0
dB
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