Measurements on Modulated Signals R&S FSL
1300.2519.12 2.28 E-11
A
CPR Repeatability IS95
IBW Method
0
0,2
0,4
0,6
0,8
1
1,2
1,4
10 100 1000
Sweep time/ms
Standard dev / dB
Adjacent channels
Alternate channels
Tx channel
Fig. 2-20 Repeatability of adjacent channel power measurement on CDMA 2000 standard
signals if the integration bandwidth method is used
6. Switch to fast ACP mode to increase the repeatability of results.
Switch the Fast ACP softkey to On.
The R&S FSL measures the power of each channel with zero span. The trace represents
power as a function of time for each channel (see Fig. 2-23). The numerical results over
consecutive measurements become much more stable.
Fig. 2-21 Measuring the channel power and adjacent channel power ratio for 2000 MC1
signals with zero span (Fast ACP)
Fig. 2-22 shows the repeatability of power measurements in the transmit channel and of relative
power measurements in the adjacent channels as a function of sweep time. The standard
deviation of measurement results is calculated from 100 consecutive measurements as shown
in Fig. 2-22. Take scaling into account if comparing power values.
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