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Philips Semiconductors
User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)
Application Note
96029
AM characteristics
V
supply
= 14.4 V, T
amb
=25°C, f
o
= 999 kHz, m = 0.3, f
mod
= 1 kHz unless otherwise specified. Dummy aerial
as shown in Figure 3.
50
60
50
Signal generator
Vin
Radio aerial input
65 pF
15 pF
Figure 3 Dummy aerial to test the AM mode
Aerial input voltage (Vin),
for (S+N)/N = 26 dB MW 55 µV
LW 80 µV
SW t.b.f.
Signal-to-noise ratio for Vin=1mV > 55 dB
AGC range 5 mV/Vin for 10 dB variation of AF output > 60 dB
RF signal handling capability for THD < 10 % at m = 0.8 > 3 V
Total Harmonic Distortion over most of the
AGC range, m = 0.8, fmod = 1 kHz < 2 %
Total bandwidth B 3dB 4.5 kHz
Fidelity ( -3 dB ) 10 Hz - 2 kHz
IF suppression IF1 (10.7 MHz) > 70 dB
IF2 (450 KHz) > 100 dB
IF selectivity S
9
>55 dB
S
18
>60 dB
IF counter resolution 250 Hz
21