Rohde & Schwarz FSV3000, Руководство пользователя

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Measurements and results
R&S
®
FSVA3000/ R&S
®
FSV3000
210 User Manual 1178.8520.02 ─ 08
Figure 5-38: Measurement of the R&S FSV/A's intrinsic noise power in a 1.23 MHz channel band-
width.
5.3.8 Optimizing and troubleshooting the measurement
If the results do not meet your expectations, or if you want to minimize the measure-
ment duration, try the following methods to optimize the measurement:
●
Only activate as many adjacent channels as necessary to minimize the required
span and thus the required measurement time for the measurement.
●
Increase the RBW to minimize the measurement time; however, consider the
requirements of the standard if you need to measure according to standard! The
automatic settings are always according to standard.
●
Take advantage of the speed optimization mode in the "Sweep" settings if you do
not require the larger dynamic range (see "Optimization" on page 475).
●
Reduce the "Sweep Time" and thus the amount of data to be captured and calcu-
lated; however, consider the requirements regarding the standard deviation.
●
To improve the stability of the measured results , increase the "Sweep Time" ,
which also leads to more averaging steps.
●
Instead of trace averaging , use an RMS detector with a higher "Sweep Time" to
obtain better average power results in less time.
●
To determine a channel power level quickly, use the Time domain power mea-
surement (TDP) rather than a Channel Power measurement. The TDP measure-
ment is a zero span measurement where the sweep time determines the measure-
ment time. Due to the FFT measurement, duplicate averaging is performed, provid-
ing very stable results very quickly.
Note, however, that for TDP measurements, channel filters are not available and a
fixed RBW is used. Thus, the measurement may not be according to standard for
some test cases.
Channel power and adjacent-channel power (ACLR) measurement