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LA7191N Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part No. LA7191N
Description  Global VHS-format VCR Video Signal Processor
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Maker  SANYO [Sanyo Semicon Device]
Homepage  http://www.ssdc-jp.com/eng/
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Parameter
Symbol
Input Output
Conditions
min
typ
max
Unit
VXO oscillation level
VVXO-R
T37A
T19
VIN = standard color bar signal (1 Vp-p),
measure T19 output amplitude (with a FET
probe)
450
560
670
mVp-p
REC ACC characteristics
ACCR1
T37A T15A VIN = standard color bar signal (1 Vp-p),
input +6 dB chroma signal level only,
measure T15A burst level, and calculate ratio
with VOR-15
0.2
0.5
dB
ACCR2
T37A T15A VIN = standard color bar signal (1 Vp-p),
input –6 dB chroma signal level only,
measure T15A burst level, and calculate ratio
with VOR-15
–0.5
–0.1
dB
REC ACC killer input level
VACCK-ON T37A T15A VIN = 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
–26
dB
REC ACC killer output level
VOACCK
T37A T15A Use a spectrum analyzer to measure the
output level at T15A in the killer state
described previously; ratio with VOR-15
–60
–50
dB
Input level for REC ACC
killer return
VACCK-OFF T4A
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
–20
dB
VXO control sensitivity
SVXO
T37A T17
T19A
Measure the pin 17 DC voltage when a
standard color bar signal is input
(1 Vp-p)...V0
Measure the frequency at T19A when V0 is
applied to pin 17 from the external power
supply...f1
Measure the frequency at T19A when V0 +
10 mV is applied to pin 17...f2
SVXO =
f
2 –f1
10
Hz/mV
3.8
5.7
7.6
Hz/mV
REC APC pull-in range
∆ fAPC1
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.
∆fAPC1 = f1 – 4433619 (Hz)
350
440
Hz
∆ fAPC2
T37A 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.
∆fAPC2 = f2 – 4433619 (Hz)
–900
–350
Hz
BGP delay time
tD
T37A
T32
T36
Measure waveforms at T32 and T36 when a
standard color bar signal (1 Vp-p) is input.
4.3
µs
BGP pulse width
tW
T37A
T32
T36
4.8
µs
Continued on next page.
LA7191N
No. 5471 - 5/11




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