LA7391AN View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
Manufacturer
LA7391AN Datasheet PDF : 11 Pages
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LA7391AN
Continued from preceding page.
Parameter
REC AFC pull-in range
Symbol Input Output
Conditions
min typ max Unit
∆fAFC1 T37A T24 Input a string of pulses (negative polarity) at 1.0 7.0
kHz
300 mV, 15.6 kHz with a width of 5 µs. After
increasing the frequency of the pulse string
until the waveform at pin 24 is disrupted,
then reduce the frequency until the waveform
at pin 24 is normal again; that pulse string
frequency is f1.
∆fAFC1 = f1 – 15.625 (kHz)
[PB Mode Chroma]
PB chroma video output
level
PB chroma pin 31 output
level
PB ACC characteristics
PB killer input level
PB killer chroma output
level
PB main converter carrier
leak
Burst de-emphasis amount
(NTSC mode)
PB XO output level
PB XO oscillation frequency
variation
∆ fAFC2
T37A T24 In the same manner, after reducing the
frequency of the pulse string until the
waveform at pin 24 is disrupted, then
increase the frequency until the waveform at
pin 24 is normal again; that pulse string
frequency is f2.
∆fAFC2 = f2 – 15.625 (kHz)
–3.7 –1.0 kHz
Vop-34
Vop-31
ACCP1
ACCP2
VACK-P
VOACK-P
CLP
GBD
VXO-P
∆ fXO
T39A
T15A
T4A
T39A
T15A
T4A
T39A
T15A
T4A
T39A
T15A
T4A
T39A
T15A
T4A
T39A
T15A
T4A
T39A
T14A
T4A
T39A
T4A
T27A
T34A
T31
T31
T31
T31
T34A
T34A
T31
T19
T19A
In PB, SP mode, input a 4 MHz: 300 mVp-p
continuous wave at T39A, and from T15A
input a chroma signal (SP mode, burst 50
mVp-p) that underwent low-band conversion
from a chroma noise test signal.
Input a 50% white signal from T4A and
measure the T34A burst level
Measure the T31 burst level under the same
conditions as for Vop-34.
Input the input chroma level at +6 dB under
the same conditions as for Vop-34 and
measure the T31 burst level, and calculate
the ratio with Vop-31.
Input the input chroma level at –6 dB under
the same conditions as for Vop-34 and
measure the T31 burst level, and calculate
the ratio with Vop-31.
Lower the input chroma level under the same
conditions as for Vop-34 and measure the
input burst level at the point where T31
chroma output ceases. (Calculate ratio with
standard input of 50 mVp-p)
Use a spectrum analyzer to measure the T34
chroma output level in the killer state
described previously. Calculate ratio with
VOP-34.
Monitor T34A with a spectrum analyzer under
the same conditions as for Vop-34 and
calculate the ratio between the 4.43 MHz
component and the 5.06 MHz carrier leak
component.
From T39A, input a 4 MHz 300 mVp-p
continuous wave; from T4A, input a 50%
white signal, and calculate the ratio between
the output level during the T31 burst interval
and the output level during other intervals.
Measure the PB mode T19 output level with
an FET probe
Measure the frequency at T19A during PB
mode...f
∆fXO = f – 4433619 (Hz)
240 300 360 mVp-p
220 270 320 mVp-p
0.5 0.8 dB
–0.5 –0.2
dB
–40 –32 –25 dB
–44 –40 dB
–40 –33 dB
–4.40 –4.65 –4.90 dB
480 610 750 mVp-p
–9 0 +9 Hz
Continued on next page.
No. 3951-6/11
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