R&S FSW Series, User Manual

Page: 307 / 1450

Measurements and Results
R&S
®
FSW
307 User Manual 1173.9411.02 ─ 43
The CCDF trace indicates the probability that a level will exceed the mean power.
The level above the mean power is plotted along the x-axis of the graph. The origin
of the axis corresponds to the mean power level. The probability that a level will be
exceeded is plotted along the y-axis.
7.8.8 Optimizing and Troubleshooting the Measurement
If the results do not meet your expectations, try the following methods to optimize the
measurement:
●
Make sure the defined bandwidth is wide enough for the signal bandwidth of the
device under test to be fully analyzed (see
"Analysis Bandwidth" on page 298).
●
If the complete signal is be measured, increase the number of samples so that the
resulting measurement time is longer than one period of a bursted signal.
●
If only parts of the signal are to be examined, define a trigger source and a gate.
7.9 Time Domain Power Measurement
The Time Domain Power measurement determines the power of a signal in the time
domain.
A time domain power measurement is only possible for zero span.
● About the Measurement ........................................................................................307
● Time Domain Power Results .................................................................................307
● Time Domain Power Basics - Range Definition Using Limit Lines ........................308
● Time Domain Power Configuration ....................................................................... 309
● How to Measure Powers in the Time Domain .......................................................310
● Measurement Example ......................................................................................... 311
7.9.1 About the Measurement
Using the Time Domain Power measurement function, the R&S FSW determines the
power of the signal in zero span by summing up the power at the individual measure-
ment points and dividing the result by the number of measurement points. Thus it is
possible to measure the power of TDMA signals during transmission, for example, or
during the muting phase. Both the mean power and the RMS power can be measured.
For this measurement, the sample detector is activated.
7.9.2 Time Domain Power Results
Several different power results can be determined simultaneously:
Time Domain Power Measurement