Electrical specifications TDA7703
18/32 Rev 1
3.5 Overall system performance
All measurements obtained with application of Figure 9 unless otherwise specified.
3.5.1 FM overall system performance
Antenna level equivalence: 0 dBµV = 1 µV
rms
(Antenna terminal voltage with 50 Ω source).
Figure 6. FM input set-up
Input level referred to signal generator loaded with 50 Ω (V
rf
, node 'A'); no antenna dummy;
AM input not connected. F
rf
= 98.1 MHz, V
rf
= 60 dBµV, mono modulation, f
dev
= 40 kHz,
f
audio
= 1 kHz. De-emphasis = 50 µs. Unless otherwise specified
Table 13. FM overall system performance
Parameter Test condition Min Typ Max Units
Tuning range FM Eu
(can be modified by the user)
87.5 108 MHz
Tuning step FM Eu 100 kHz
Tuning range FM US 87.5 107.9 MHz
Tuning step FM US 200 kHz
Tuning range FM Jp 76 90 MHz
Tuning step FM Jp 100 kHz
Tuning range FM EEu 65 74 MHz
Tuning step FM EEu 100 kHz
Sensitivity S/N =26dB -3 0 dBµV
Ultimate S/N
@ 60 dBµV, mono 72 75 dB
@ 60 dBµV,
Deviation = 75 kHz, mono
77 80 dB
@ 60 dBµV, stereo 70 73 dB
Distortion Deviation= 75 kHz 0.15 %
Max deviation THD=3% 120 kHz
Adjacent channel selectivity
(V
u
/V
d
)
ΔF=100 kHz, SINAD=30 dB
desired 40 dBµV, dev=40kHz,
400Hz
undesired. dev=40kHz, 1KHz
13 dB
Alternate channel selectivity
(V
u
/V
d
)
ΔF=200 kHz, SINAD=30 dB
desired 40 dBµV,
dev=40 kHz, 400 Hz
undesired. dev=40kHz, 1kHz
62 dB
V
rf
+ 6dB
PCB
UNDER
TEST
50
Ω
V
rf
+ 6dB
V
rf
50
Ω
50
Ω
A
