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LA71525M Datasheet(PDF) 5 Page - Sanyo Semicon Device

Part No. LA71525M
Description  Video/audio signal processor for VHS VCRs
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Manufacturer  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LA71525M Datasheet(HTML) 5 Page - Sanyo Semicon Device

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LA71525M
No. 5843-5/25
min
t y p
max
[REC mode chroma]
REC chroma
T28A
T14A
215
225
235 mVp-p
low-range converter output level
180
190
200
REC chroma/FM ratio
T28A
T14A
–3.7
–3.0
–2.3
dB
T18
Burst emphasis amount
T28A
T14A
5.5
6.0
6.5
dB
(NTSC mode)
VXO oscillation level
T28A
T56
300
500
700
mVp-p
(PAL mode)
VXO oscillation level
T28A
T56
300
500
700
mVp-p
(NTSC mode)
REC ACC characteristics 1
T28A
T14A
dB
REC ACC characteristics 2
T28A
T14A
–0.5
–0.1
dB
REC ACC
T28A
T14A
–26
dB
Killer input level
REC ACC
T28A
T14A
T14A output level measured with spectrum analyzer and
–60
–50
dB
Killer output level
compared to VOR-14, in killer condition as described
above.
REC ACC
T28A
T14A
–20
dB
Demodulator input level
REC APC
T28A
T14A
Input signal: 50% white signal superimposed with
350
Hz
Pull-in range 1
4.4336 MHz 300 mVp-p CW. After checking that T14A
output is on, CW frequency is raised until T14A output
goes off. Frequency then is gradually reduced.
CW frequency when T14A output goes on: f1
REC APC
T28A
T14A
Same as above, CW frequency is lowered until T14A
–350
Hz
Pull-in range 2
output goes off. Then frequency is gradually raised.
CW frequency when T14A output goes on: f2
REC AFC
T28A
T51
300 mVp-p, 15.6 kHz pulse train with 5
µs pulse width
kHz
Pull-in range 1
is input. Pulse train frequency is raised until T51 output
waveform is impaired. Then frequency is lowered.
Pulse train frequency when T51 waveform becomes
normal: f1
REC AFC
T28A
T51
Same as above, pulse train frequency is lowered until T51
–1.0
kHz
Pull-in range 2
output waveform is impaired. Then frequency is raised.
Pulse train frequency when T51 waveform becomes
normal: f2
BGP delay time
T28
T37
T37 and T60 waveforms are observed with standard color
3.1
3.4
3.7
µs
T60
bar input to T28A
BGP width
4.7
4.9
5.1
µs
+0.5
Symbol
Parameter
+0.2
0.5
0.2
+1.0
Input
Output
Conditions
Unit
Ratings
Continued on next page
VOR-14
C/FM
GBE
VVXO-RP
VVXO-RN
ACCR1
ACCR2
VACCK-ON
VOACCK
VACCK-OFF
∆f
APC1
∆f
APC2
∆f
AFC2
∆f
AFC1
T14A burst level measured with VIN = 1 Vp-p
CTL 0
standard color bar signal
1
tD
tW
Down-converted chroma level/FM level ratio with 100%
chroma input
(RL: 5.1 kΩ)
SP/EP and LP T14A burst level ratio with VIN = 1 Vp-p
standard color bar signal
T56 output amplitude measured with FET probe at
VIN = 1 Vp-p standard color bar signal
T56 output amplitude measured with FET probe at
VIN = 1 Vp-p standard color bar signal
VIN = 1 Vp-p standard color bar signal and chroma
signal only boosted by +6 dB
T14A burst level measured and compared to VOR-14
VIN = 1 Vp-p standard color bar signal and chroma
signal only boosted by –6 dB
T14A burst level measured and compared to VOR-14
T14A input burst level measured when output goes off
and compared to standard input level, with VIN = 1 Vp-p
standard color bar signal and chroma signal being
gradually attenuated.
From killer condition as described above, T14A input
burst level is measured when output goes on with input
chroma level being gradually increased. This is
compared to standard input level.
Continued from preceding page
T37
T60
tD tW
A10276


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