Keysight N1911A

Using E9300 E-Series Power Sensors 5
Keysight N1911A/1912A User’s Guide 193
CDMA signal measurements
Figure 5-5 and Figure 5-6 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 5-5 uses correction factors to correct for power levels beyond its square
law operating region.
Figure 5-5 Wideband CDMA error of E-Series E9300 power sensor versus
corrected CW sensor.
Figure 5-6 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