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參數(shù)資料
| 型號： | FM1246 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | CABLE ASSEM 2MM 40POS F-F 12,1 |
| 中文描述： | 桌面視頻 |
| 文件頁數(shù)： | 9/24頁 |
| 文件大?。?/td> | 177K |
| 代理商： | FM1246 |
1997 May 14
9
Philips Components
Preliminary specification
Desktop video & FM radio module
system CCIR I
FM1246
Definitions of test signals
(see Fig.2)
Aerial input characteristics
TEST SIGNAL
FREQ.
(MHz)
AMPLITUDE
MODULATION
VIDEO
AUDIO
A0: unmodulated vision
carrier
A1: CCIR I standard signal
with video modulation
B1: unmodulated sound
carrier I system
B2: FM modulated sound
carrier I system
480.25
60 dB
μ
V
480.25
60 dB
μ
V
(top sync)
7 dB w.r.t. A1
100% (rest carrier 10%)
2T pulse and bar
486.25
486.25
7 dB w.r.t. A1
1 kHz; modulation frequency
deviation
±
27 kHz;
50
μ
s pre-emphasis
B3: unmodulated sound
carrier I system
C1: FM modulated sound
carrier
478.25
15 dB w.r.t. A1
87.5
60 dB
μ
V
1 kHz; modulation frequency
deviation
±
75 kHz;
10% pilot carrier (L = R)
1 kHz; modulation frequency
deviation
±
75 kHz;
10% pilot carrier (L = R)
1 kHz; modulation frequency
deviation
±
75 kHz;
10% pilot carrier (L = R)
1 kHz; modulation frequency
deviation
±
22.5 kHz
C2: FM modulated sound
carrier
98.0
60 dB
μ
V
C3: FM modulated sound
carrier
108.0
60 dB
μ
V
C4: FM modulated sound
carrier
C5: unmodulated sound
carrier
98.0
60 dB
μ
V
98.0
60 to 100 dB
μ
V
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VSWR
reflection coefficient
referred to 75
impedance
(worst case on or between picture
and sound carrier at maximum gain):
all channels in TV mode
FM (centre of channel)
5
5
4
46
V
PSM
V
ant
surge protection voltage
antenna connection disturbance
voltage
kV
dB
μ
V
<1.75 GHz
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