Using E9300 E-Series Power Sensors 3
N1913/1914A EPM Series Power Meters User’s Guide User’s Guide 111
CDMA Signal Measurements
Figure 3- 6 and Figure 3-7 show typical results obtained when measuring
a CDMA signal. In these examples, the error is determined by measuring
the source at the amplitude of interest, with and without CDMA
modulation, adding attenuation until the difference between the two values
stops changing. The CW sensor in Figure 3- 6 uses correction factors to
correct for power levels beyond its square law operating region.
Figure 3-6 Wideband CDMA error of E-Series E9300 power sensor versus corrected CW
sensor
Figure 3-7 CDMA (IS-95A): 9Ch Fwd
1.2
1
0.8
0.6
0.4
-30 -20 -10 0 10
20
30
0.2
0
0.2
Power (dBm)
Error (dB)
Lower Range Error
Upper Range Error
CW Sensor Error
0.1
0.05
0
-0.05
-30
-20
-10
0
10
20
30
-0.1
-0.15
-0.2
Power (dBm)
Modulation Error (dB)
Lower Range Error
(E9300 E-Series power
sensor only shown)
Upper Range Error
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