Philips Components
Desktop video & FM radio module
system CCIR I
Preliminary specification
FM1246
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
FM radio characteristics
α26
limiting sensitivity for (S+N)/N
α50
S/N ratio:
mono at f = 22.5 kHz
mono at f = 75 kHz
stereo
αi(FM)
FM image rejection
effective selectivity S300
frequency response:
lower −3 dB point
upper −3 dB point
AM suppression
FM AF output level at
terminal 20/21 (RMS value):
mono
stereo
stereo separation
THD
total harmonic distortion:
stereo at 1 kHz
during overmodulation at
f = ±100 kHz
test signal C1
−
7
30
test signal C3
−
30
40
test signal C1
55
58
−
65
68
−
test signal C3
55
63
−
test signal C1
53
65
−
test signal C1 + C2
50
−
−
test signal C3; −3 dB points
−
20
40
14
18
−
test signal C1
38
−
−
dBµV
dBµV
dB
dB
dB
dB
dB
Hz
kHz
dB
test signal C1
test signal C3
test signal C3; 1 kHz
test signal C3
40
57
74
mV
120 175 230
mV
28
35
−
dB
−
0.8
1.5
%
−
1.5
3
%
Note
1. All the pins of the desktop video tuner are protected against electrostatic discharge (ESD) up to 2 kV. The product is
classified in category B (‘‘MIL-STD-883C”).
1997 May 14
11