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參數(shù)資料
| 型號(hào)： | LA7191N |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Global VHS-format VCR Video Signal Processor |
| 中文描述： | 全球錄影帶格式錄像機(jī)視頻信號(hào)處理器 |
| 文件頁(yè)數(shù)： | 5/11頁(yè) |
| 文件大?。?/td> | 146K |
| 代理商： | LA7191N |
Continued from preceding page.
Parameter
Symbol
V
VXO-R
Input
Output
T37A
Conditions
min
450
typ
560
max
670
Unit
mVp-p
VXO oscillation level
T19
V
IN
= standard color bar signal (1 Vp-p),
measure T19 output amplitude (with a FET
probe)
T15A V
IN
= standard color bar signal (1 Vp-p),
input +6 dB chroma signal level only,
measure T15A burst level, and calculate ratio
with V
OR
-15
T15A V
IN
= standard color bar signal (1 Vp-p),
input –6 dB chroma signal level only,
measure T15A burst level, and calculate ratio
with V
OR
-15
T15A V
IN
= standard color bar signal (1 Vp-p),
lower the chroma signal, and measure the
input burst level at the point where output at
T15A ceases, and calculate the ratio with the
standard input level
T15A Use a spectrum analyzer to measure the
output level at T15A in the killer state
described previously; ratio with V
OR-15
T34A Starting from the killer state described
previously, gradually raise the input chroma
level and measure the input burst level when
output is generated at T15A and calculate the
ratio with the standard input level
T37A T17
T19A
standard color bar signal is input
(1 Vp-p)...V
0
Measure the frequency at T19A when V
0
is
applied to pin 17 from the external power
supply...f
1
Measure the frequency at T19A when V
0
+
10 mV is applied to pin 17...f
2
f
2
– f
1
10
REC ACC characteristics
ACC
R1
T37A
0.2
0.5
dB
ACC
R2
T37A
–0.5
–0.1
dB
REC ACC killer input level
VACC
K-ON
T37A
–26
dB
REC ACC killer output level
VO
ACCK
T37A
–60
–50
dB
Input level for REC ACC
killer return
V
ACCK-OFF
T4A
–20
dB
VXO control sensitivity
S
VXO
Measure the pin 17 DC voltage when a
S
VXO
=
Hz/mV
3.8
5.7
7.6
Hz/mV
REC APC pull-in range
f
APC1
T37A
T15A Input a 50% white signal overlapped with a
4.4336 MHz, 300 mVp-p continuous wave.
After confirming that there is output at T15A,
increase the frequency of the CW until the
output at T15A stops, and then gradually
reduce the frequency until output appears
again at T15A; that CW frequency is f1.
f
APC1
= f1 – 4433619 (Hz)
T15A In the same manner, reduce the frequency of
the CW until the output at T15A stops, and
then gradually increase the frequency until
output appears again at T15A; that CW
frequency is f2.
f
APC2
= f2 – 4433619 (Hz)
T32
T36
standard color bar signal (1 Vp-p) is input.
350
440
Hz
f
APC2
T37A
–900
–350
Hz
BGP delay time
t
D
T37A
Measure waveforms at T32 and T36 when a
4.3
μs
BGP pulse width
t
W
T37A
T32
T36
4.8
μs
Continued on next page.
LA7191N
No. 5471 - 5/11
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