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參數資料
| 型號： | MGM3000X |
| 廠商： | SIEMENS A G |
| 元件分類： | 消費家電 |
| 英文描述： | Video Modulator for FM/AM-Audio |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO20 |
| 文件頁數： | 8/23頁 |
| 文件大小： | 1016K |
| 代理商： | MGM3000X |
Semiconductor Group
8
MGM 3000X
RF-output voltage
V
Q
2.5
4.5
5.5
mVrms
Ch 60;
video 100 % white;
without audio- signal
1
RF-output phase
a
15, 17
140
180
220
deg
RF-output voltage
changes
V
Q
V
Q
V
Q
0
0
0
1.5
1.5
1.5
dB
dB
dB
f
= 743.25-
823.25 MHz
f
= 80 MHz;
Ch 55-65
f
= 100-300 MHz
f
= 48-100 MHz
1
1
1
Intermodulation ratio
a
IMR
60
75
dB
f
VC
+ 1.07 MHz
f
VC
+ 1.57 MHz
f
VC
+ 2.07 MHz
2
Harmonic wave ratio
a
O
60
dB
f
VC
+ 8.8 MHz
f
VC
+ 13.29 MHz
f
VC
+ 17.72 MHz,
without video
2
13, 14, 15 unmodulated video and audio carrier, measured with the spectrum analyzer as
difference between video carrier signal level and sideband signal level; loaded
Q
factor
Q
L
of the
audio oscillator resonance circuit adjusted by
R
P
to provide the required video to audio carrier ratio
of 12.5 dB;
Q
U
= 25.
Video to audio carrier
ratio
a
V/A
10
12.5
15
dB
f
VC
+
f
AC
(5.5 MHz)
1
Harmonic wave ratio
Harmonic wave ratio
a
O
a
O
60
80
dB
dB
f
VC
+ 2
f
AC
(11 MHz)
f
VC
+ 3
f
AC
(16.5 MHz)
1
1
AC/DC Characteristics
(cont’d)
T
A
= 25
°
C;
V
S
= 12 V
Parameter
Symbol
Limit Values
Unit
Test Condition
Test
Circuit
min.
typ.
max.
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