3- Analog Crosstalk
Fig. A7: Analog crosstalk measurements.
TRACKING GENERATOR
50Ω
+5V
Vg
Vin
TEST BOARD
DALC
208
C=100nF
DALC208SC6
SPECTRUM ANALYSER
50Ω
Vout
Figure A7 gives the measurement circuit for the
analog application. In usual frequency range of
analog signals (up to 100MHz) the effect on
disturbed line is less than -45 dBm (please see Fig.
A8).
Fig. A8: Analog crosstalk results.
dBm
0
-20
-40
-60
Fig. A9: Measurement conditions.
TRACKING GENERATOR
50Ω
+5V
Vg
Vin
TEST BOARD
DALC
208
C=100nF
SPECTRUM ANALYSER
50Ω
Vout
-80
-100
1
10
100
f(MHz)
1,000
As the DALC208SC6 is designed to protect high
speed data lines, it must ensure a good
transmission of operating signals. The attenuation
curve give such an information.
Fig. A10: DALC206SC6 attenuation.
dBm
0
-10
Fig. A10 shows that the DALC208SC6 is well
suitable for data line transmission up to 100 Mbit/s
while it works as a filter for undesirable signals as
GSM (900MHz).
-20
-30
1
10
100
f(MHz)
1,000
7/10