Philips Components
Desktop video & FM radio module
system M, N
Preliminary specification
FM1236
Definitions of test signals (see Fig.2)
TEST SIGNAL
A0: unmodulated vision
carrier
A1: RF M, N standard signal
with video modulation
B1: unmodulated sound
carrier M, N system
B2: FM modulated sound
carrier M, N system
B3: unmodulated sound
carrier M, N system
C1: FM modulated sound
carrier
C2: FM modulated sound
carrier
C3: FM modulated sound
carrier
FREQ.
(MHz)
AMPLITUDE
477.25 60 dBµV
477.25
481.25
481.25
60 dBµV
(top sync)
−7 dB w.r.t.
A0 to A1
−7 dB w.r.t.
A0 to A1
483.25
98.00
−12 dB w.r.t.
A0 to A1
60 dBµV
97.70 60 dBµV
or 98.30
98.00 60 dBµV
VIDEO
MODULATION
AUDIO
100% (rest carrier 12.5%)
2T pulse and bar
1 kHz; modulation frequency
deviation ±25 kHz;
75 µs pre-emphasis
1 kHz; modulation frequency
deviation ±22.5 kHz
1 kHz; modulation frequency
deviation ±22.5 kHz
1 kHz; modulation frequency
deviation ±75 kHz;
10% pilot carrier (L = R);
75 µs pre-emphasis
Aerial input characteristics
SYMBOL
PARAMETER
VSWR reflection coefficient
VPSM
Vant
surge protection voltage
antenna connection disturbance
voltage
CONDITIONS
MIN.
referred to 75 Ω impedance
(worst case on or between picture
and sound carrier at maximum gain):
all channels in TV mode
−
FM (centre of channel)
−
5
1 to <54 MHz
−
54 to <300 MHz
−
300 to <1000 MHz
−
MAX.
5
4
−
10
34
50
UNIT
kV
dBµV
dBµV
dBµV
1997 Feb 03
9