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參數(shù)資料
| 型號： | LA71521M |
| 文件頁數(shù)： | 6/25頁 |
| 文件大?。?/td> | 520K |
| 代理商： | LA71521M |
LA71521M
No. 5842-6/25
min
typ
max
2 fsc output level
T28A
T58
T58 level measured in no-signal input condition
360
400
440
mVp-p
2 fsc duty
T28A
T58
T58 duty measured in no-signal input condition
40
50
60
%
[PB mode chroma chroma]
PB chroma video
T15A
T38
From T15A in PB and SP mode, a chroma signal
490
580
670
mVp-p
Output level
T26A
down-converted from the PAL chroma noise test signal
(PAL mode)
(SP mode, burst 80 mVp-p) and mixed with a 4 MHz
300 mVp-p sine wave is input.
From T26A, a 50% white signal is input.
Burst level is measured at T38.
PB chroma video
T15A
T38
From T15A in PB and SP mode, a chroma signal
490
580
670
mVp-p
Output level
T26A
down-converted from the NTSC chroma noise test signal
(NTSC mode)
(SP mode, burst 160 mVp-p) and mixed with a 4 MHz
300 mVp-p sine wave is input.
From T26A, a 50% white signal is input.
Burst level is measured at T38.
PB chroma
T15A
170
200
230
mVp-p
Pin 46 output level
T26A
T46
T15A
0.5
0.8
dB
T26A
T46
T15A
T46
–0.5
–0.2
dB
T26A
PB killer input level
T15A
T46
–25
dB
T26A
Chroma output level in PPB killer
T15A
T38
–44
–40
dB
condition
T26A
PB main converter carrier leak
T15A
T38
–40
–33
dB
T26A
%
Burst deemphasis
T15A
T46
629 kHz, 160 mVp-p CW is mixed with 4 MHz, 300 mVp-p
–5.75
–5.50
–5.25
dB
(PAL mode)
T26A
CW and input to T15A.
50% white signal is input from T26A.
Output level during T46 burst interval and during other
times is compared.
PB XO output level
T59
T59 output level measured with FET probe in PB mode
300
500
700
mVp-p
(NTSC mode)
PB XO oscillator frequency
T59
T59 frequency measured in PB mode: f
–9
0
Hz
deviation (PAL mode)
NTSC -> PAL conversion
T15A
–1
0
dB
V axis burst level
T26A
T38
NTSC -> PAL conversion
T15A
–2
0
dB
Burst level ratio
T26A
T38
Parameter
Symbol
+9
+1
+2
Input
Output
Conditions
Ratings
Unit
Under same conditions as above, +45
°
burst level is
measured and compared to V
BNAP
Continued from preceding page
Continued on next page
V2
fsc
D2
fsc
P
Vop-38
N
Vop-38
Vop-46
ACC
P
1
ACC
P
2
PB ACC characteristics 1
PB ACC characteristics 2
V
ACK-P
V
OACK-P
C
LP
G
BD
V
XO-PP
V
BNAP
f
XOP
B-NAP
Under same conditions as for P
Vop-38
, T46 burst level is
measured.
Under same conditions as for P
Vop-38
, input chroma
level is raised by +6 dB. T46 burst level is measured
and compared to P
Vop-38
.
Under same conditions as for P
Vop-38
, input chroma
level is raised by –6 dB. T46 burst level is measured
and compared to P
Vop-38
.
Under same conditions as for P
Vop-38
, input chroma
level is attenuated and input burst level is measured
when chroma output at T46 goes off (compared to
standard input 80 mVp-p)
T38 measured with spectrum analyzer and compared to
P
Vop-38
in killer condition as described above.
Under same conditions as for P
Vop-38
, T38 is measured
with spectrum analyzer and 4.43 MHz component is
compared to 5.06 MHz component.
From T15A, down-converted chroma noise test signal
mixed with 4 MHz, 300 mVp-p CW is input.
From T26A, 50% white signal is input.
–45
°
burst level at T38 is measured and compared to
P
Vop-38
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