Keysight Technologies E Series - CDMA Signal Measurements

Making Measurements 2
Keysight E-Series E9300 Operating and Service Guide 33
CDMA Signal Measurements
Figure 2-3 and Figure 2-4 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 2-3 uses correction factors to correct for power levels beyond its square
law operating region.
Figure 2-3 Wideband CDMA error of Keysight E-Series E9300 power sensor
versus corrected CW sensor
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