R&S FSH
Measuring the channel power of continuously modulated signals
1145.5973.12 4.37
E-11
Using the R&S FSH View control software, additional
standards can be generated and permanently loaded
into the R&S FSH. You can also delete the factory-set
standards provided in the instrument if you do not need
them. The R&S FSH then offers only the standards
you require, for example for measurements on TV
signals.
Setting the reference level
When selecting the reference level, ensure that the R&S FSH is not overdriven. As the power is
measured with a resolution bandwidth that is small in comparison with the signal bandwidth, the
R&S FSH may still be overdriven even though the trace is still within the measurement diagram. To
prevent the R&S FSH from being overdriven, the signal can be measured at the largest resolution
bandwidth possible using the peak detector. If this setting is selected, it is not possible for the trace to
exceed the reference level.
To simplify operation and to prevent incorrect measurements, the R&S FSH has an automatic routine
for setting the reference level.
Press the LEVEL ADJUST softkey.
The R&S FSH starts the measurement of the optimal
reference level using a resolution bandwidth of 1 MHz,
a video bandwidth of 1 MHz and the peak detector.
During the measurement, the message "Adjusting level
for channel power measurement, please wait... " is
output.
The optimal reference level is then set.
Setting the channel bandwidth
The channel bandwidth specifies the frequency range about the center frequency, over which the
R&S FSH performs the power measurement.
