Power Measurements – MEAS Key R&S FSL
1300.2519.12 4.102 E-11
Adjust Ref Level (span > 0)
Adjusts the reference level to the measured total power of the signal. The softkey is activated
after the first sweep with active measurement of the occupied bandwidth has been completed
and the total power of the signal is thus known.
Adjusting the reference level ensures that the signal path will not be overloaded and the
dynamic range not limited by too low a reference level. Since the measurement bandwidth for
channel power measurements is significantly lower than the signal bandwidth, the signal path
may be overloaded although the trace is distinctly below the reference level. If the measured
channel power is equal to the reference level, the signal path cannot be overloaded.
Remote: POW:ACH:PRES:RLEV
APD
Activates the function to measure the amplitude probability density (APD) and opens a
submenu.
Remote: CALC:STAT:APD ON
Percent Marker
Opens an edit dialog box to enter a probability value and to position marker 1. Thus, the power
which is exceeded with a given probability can be determined very easily. If marker 1 is
deactivated, it will be switched on automatically.
Remote: CALC:MARK:Y:PERC 0...100%
Res BW
Opens an edit dialog box to set the resolution bandwidth directly. The function of this softkey is
identical to the Res BW Manual softkey in the bandwidth menu.
For correct measurement of the signal statistics the resolution bandwidth has to be wider than
the signal bandwidth in order to measure the actual peaks of the signal amplitude correctly. In
order not to influence the peak amplitudes the video bandwidth is automatically set to 10 MHz.
The sample detector is used for detecting the video voltage.
Remote: BAND 3 MHz
# of Samples
Opens an edit dialog box to set the number of power measurements that are taken into account
for the statistics.
Apart from the number of measurements the overall measurement time depends also on the set
resolution bandwidth as the resolution bandwidth directly influences the sampling rate.
Remote: CALC:STAT:NSAM <value>
Scaling
Opens a submenu to change the scaling parameters of x– and y–axis.
To Next Page
Loading...
