Measurements on CW Signals
R&S FSH
1145.5973.12 2.8
E-11
The R&S FSH opens the screen and the menu for the power measurement. If no power sensor is
connected, no measured value is displayed. If a power sensor is connected, the R&S FSH establishes
a connection to the power sensor via the interface and, after a few seconds, displays the connected
power sensor type (R&S FSH-Z14 or R&S FSH-Z44) as well as the measured forward power and return
loss of the load.
Before performing the power measurement, zero the power sensor.
!
Press the ZERO softkey.
The R&S FSH informs you not to apply any signals
while the power sensor is being zeroed.
!
Disconnect the power sensor from any signal
sources.
!
Start zeroing with the first or second softkey
(CONTINUE).
Softkey 4 or 5 (CANCEL) can be used to cancel
zeroing before it begins, e.g. if the signal source
cannot be disconnected.
The R&S FSH immediately starts power sensor zeroing. While this is being done, the R&S FSH outputs
the message "Zeroing power sensor, please wait...".
When zeroing is over, the R&S FSH outputs the message "Power Sensor Zero OK" and switches back
to the softkey menu for the power sensor.
!
Now connect the R&S FSH-Z14 or R&S FSH-Z44 between the source and the load.
!
The R&S FSH displays the measured forward power level in dBm and the VSWR of the load.
To achieve maximum measurement accuracy, enter the frequency of the signal under test.
!
Press the FREQ softkey.
The R&S FSH opens the entry box for the frequency.
!
Using the numeric keys, enter the desired frequency
and terminate the input with the ENTER key or by
pressing the FREQ softkey again.
The R&S FSH transfers the new frequency to the
power sensor which then corrects the measured power
readings.
