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参数资料
| 型号： | NTE1570 |
| 厂商： | NTE Electronics, Inc. |
| 英文描述： | Integrated Circuit TV Video IF, Sound IF |
| 中文描述： | 集成电路电视视频中频，声音中频 |
| 文件页数： | 5/5页 |
| 文件大小： | 36K |
| 代理商： | NTE1570 |
Notes (cont
’
d):
Note18. Output Impedance
(1) SIF IN: f = 4.5MHz, FM f
MOD
= 400Hz,
f =
±
25kHz, 80dB
μ
.
(2) At P
23
read the V
O1
at R
X
=
∞
, then read the R
X
when recovered output become
V
O1
/2 with varying the R
X
. The R
X
is the output impedance.
Note19. ATT MAX.
(1) SIF IN: f = 4.5MHz, FM f
MOD
= 400Hz,
f =
±
25kHz, 80dB
μ
.
(2)
Read the 400Hz component of V
A1
at P
2
with R
A
= 0, then read V
A1
’
with R
A
=
∞
.
Note20. v
PT
(1) SIF IN: f = 4.5MHz, FM f
MOD
= 400Hz,
f =
±
25kHz, 80dB
μ
.
(2) Read the 400Hz component at P
3
.
Note21. G
V
AF
(1) Apply 400Hz 0.1V
rms
signal to P
2
.
(2) Read the output voltage at P
3
.
Note22. Read the 400Hz component of V
A1
at P
2
with R
A
= 0. Set R
A
so that V
A1
’
= 1/2V
A1
(
–
6dB),
then read DC voltage of Pin1 (V
1
).
Note23. Read the 400Hz component of V
A1
at P
2
with R
A
= 0. Set R
A
so that V
A1
’
= 3.16 x 10
–
3
V
A1
(
–
50dB), then read DC voltage of Pin1 (V
1
).
V
CC
Pin Connection Diagram
AFT Output 2
AFT Output 1
AFT Tank
Video Output
Video Tank
Video Tank
SIF Detector
De
–
Emphasis
SIF Detector
SIF Input
1
2
3
4
5
6
7
8
9
10
11
12
Volume Control
NFB
Audio Output
Audio GND
IF AGC Filter/
VCR Switch
PIF Input
PIF Input
PIF Input
PIF Input
24
23
22
21
20
19
AFT Tank
18
17
16
15
14
13
RF AGC Delay
RF AGC Output
PIF GND
1
12
24
13
1.300 (33.02)
Max
.520
(13.2)
.600
(15.24)
1.100 (27.94)
.100 (2.54)
.225
(5.73)
Max
.126
(3.22)
Min
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