U4062B Datasheet, PDF (18/21 Pages) TEMIC Semiconductors – HF Front End for Car Radios and HiFi Receivers

U4062B
Figure 44. Block diagram of the test set up
Test conditions
D De-emphasis - 75ms
D AF bandwidth 30 to 20 kHz
D RMS, unweighted
Setup for one signal measurement
D f_D = 98 MHz
Note: V_oAF related to 75 kHz dev., 1 kHz, V_iD = 66 dB mV
Setup for three signals intermodulation measurement
D S_D :
D S_UD1 :
D S_UD2 :
D V_iD :
f_D = 98 MHz, FM: 1 kHz, 22.5 kHz dev.
FM: 0.15 kHz, 22.5 kHz dev.
Unmodulated
for 35 dB SINAD
80
70
f_UD1=98.8MHz,
f_UD2=99.6MHz
60
f_UD1=94.8MHz,
50
f_UD2=91.6MHz
40
f_UD1=97.2MHz,
f_UD2=96.4MHz
30
20
10
0
60 70
95 10443
f_UD1=101.2MHz,
f_UD2=104.4MHz
80 90 100 110 120
V_{iUD1, 2} ( dBmV )
Figure 45. V_ID vs. V_iUD1,2
V_ID = input desired, V_iUD = input undesired
20
FM: 1 kHz, 75 kHz dev.
0
FM: 1 kHz, 22.5 kHz dev.
–20
–40
THD: 1 kHz, 75 kHz dev.
–60
–80
Noise
AM: 1 kHz, 30%
0
10
20
30
40
50
60
70
80
90
100
110
95 10442
V_iD ( dBmV )
Figure 46. V_oAF vs. V_iD
18 (21)
Rev. A1, 07-Dec-98