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FM1246 数据表(PDF) 9 Page - NXP Semiconductors

部件名 FM1246
功能描述  Desktop video & FM radio module system CCIR I
Download  24 Pages
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

FM1246 数据表(HTML) 9 Page - NXP Semiconductors

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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
480.25
60 dB
µV
A1: CCIR I standard signal
with video modulation
480.25
60 dB
µV
(top sync)
100% (rest carrier 10%)
2T pulse and bar
B1: unmodulated sound
carrier I system
486.25
−7 dB w.r.t. A1
B2: FM modulated sound
carrier I system
486.25
−7 dB w.r.t. A1
1 kHz; modulation frequency
deviation
±27 kHz;
50
µs pre-emphasis
B3: unmodulated sound
carrier I system
478.25
−15 dB w.r.t. A1
C1: FM modulated sound
carrier
87.5
60 dB
µV
1 kHz; modulation frequency
deviation
±75 kHz;
10% pilot carrier (L = R)
C2: FM modulated sound
carrier
98.0
60 dB
µV
1 kHz; modulation frequency
deviation
±75 kHz;
10% pilot carrier (L = R)
C3: FM modulated sound
carrier
108.0
60 dB
µV
1 kHz; modulation frequency
deviation
±75 kHz;
10% pilot carrier (L = R)
C4: FM modulated sound
carrier
98.0
60 dB
µV
1 kHz; modulation frequency
deviation
±22.5 kHz
C5: unmodulated sound
carrier
98.0
60 to 100 dB
µV
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VSWR
reflection coefficient
referred to 75
Ω impedance
(worst case on or between picture
and sound carrier at maximum gain):
all channels in TV mode
5
FM (centre of channel)
4
VPSM
surge protection voltage
5
kV
Vant
antenna connection disturbance
voltage
<1.75 GHz
46
dB
µV


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