參數(shù)資料
型號(hào)： LC074146LP
元件分類： 音頻／視頻放大
英文描述： 1 CHANNEL, AUDIO/VIDEO AMPLIFIER, QCC40
封裝： 5 X 5 MM, VQLP-40
文件頁(yè)數(shù)： 12/14頁(yè)
文件大小： 524K
代理商： LC074146LP
LA71582M
No.A0221-7/38
Continued from preceding page.
Ratings
Parameter
Symbol
In
Out
Conditions
min
typ
max
Unit
REC APC pull-in
range (1)
NTSC MODE
fAPC1
T38A
T72
Input a signal consisting of a 4.4336MHz CW added
to a 50% white signal. After confirming that a signal is
output from T72, increase the CW frequency until T72
output ceases.
Now slowly reduce the CW frequency, and let f1 be
the frequency at which T72 output reappears.
fAPC1 = f1-4433619 (Hz)
300
Hz
REC APC pull-in
range (2)
NTSC MODE
fAPC2
T38A
T72
As in the previous item, decrease the CW frequency
until T72 output ceases.
Now, slowly increase the CW frequency and let f2 be
the frequency at which T72 output reappears.
fAPC2 = f2-4433619 (Hz)
-300
Hz
REC AFC pull-in
range (1)
fAFC1
T38A
T62
Input a 300mVp-p, 15.6kHz, 5
s width pulse train
(negative polarity).
After increasing the pulse train frequency until the
T62 wave form is disrupted, decrease the frequency
until the T62 wave form returns to normal and let f1 be
that frequency.
fAFC1 = f1-15.625 (kHz)
1.0
kHz
REC AFC pull-in
range (2)
fAFC2
T38A
T62
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 = f2-15.625 (kHz)
-2.5
-1.0
kHz
The ratio of the REC
chroma level and FM
modulator output level 1
PAL MODE
C/FM1
T38A
T72
T12
The ratio of 100% chroma’s level which was
converted to low band and FM modulator output level.
*Serial Gr6: ---- --00,Gr7: ---- --00
-8
dB
The ratio of the REC
chroma level and FM
modulator output level 1
NTSC MODE
C/FM2
T38A
T72
T12
The ratio of 100% chroma’s level which was
converted to low band and FM modulator output level.
*Serial Gr6:---- --00,Gr7:---- --00
-8
dB
PILOT BURST
Amplitude
LPB
T38A
T72
The amplitude of pilot burst which was inserted in
recording.
100
mVp-p
PILOT BURST
Phase
PPB
T38A
T72
The phase of pilot burst which was inserted in
recording.
270
deg
PB Mode Chroma
Ratings
Parameter
Symbol
In
Out
Conditions
min
typ
max
Unit
PB chroma video
output level
PAL MODE
PVop-29
T74A
T20A
T29
Input a chroma signal that is a lower frequency
converted chroma noise test signal (SP mode, burst
50mVp-p) to T74A.
Input a 4MHz 300mVp-p sine wave to T74A, and a
50% white signal to T20A.
Measure the burst level on T29.
490
580
670
mVp-p
PB chroma video
output level
NTSC MODE
Nvop-29
T74A
T20A
T29
Input a chroma signal that is a lower frequency
converted chroma noise test signal (SP mode, burst
100mVp-p) to T74A.
Input a 4MHz 300mVp-p sine wave to T74A, and a
50% white signal to T20A.
Measure the burst level on T29.
490
580
670
mVp-p
PB chroma pin 72
output level
Vop-72
T74A
T20A
T72
Measure the burst level with the same conditions
as those for PVop-72.
280
mVp-p
PB ACC
characteristics (1)
ACCP1
T74A
T20A
T72
With the conditions used for PVop-29, increase the
input chroma level by +6dB, measure the burst level
on T72, and calculate the ratio with Vop-72.
+0.5
+0.8
dB
PB ACC
characteristics (2)
ACCP2
T74A
T20A
T72
With the conditions used for PVop-29, decrease the
input chroma level by -6dB, measure the burst level
on T72, and calculate the ratio with Vop-13.
-0.5
-0.2
dB
Continued on next page.
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