R&S FSH Network Analyzer Mode
Performing Vector Measurements (R&S FSH-K42)
Operating Manual 1173.6275.12 - 30 192
6.4.1 Measuring the Transmission
The example included here is based on a transmission measurement of a two-port
filter. The filter works in the frequency from of 1920 MHz to 1980 MHz.
Test setup
► Connect the input of the DUT to the tracking generator output (port 2).
► Connect the output of the DUT to the RF input (port 1).
Preset the R&S FSH
Before starting the measurement procedure, preset the R&S FSH to restore the default
configuration and connect the filter between the measurement ports.
► Press the PRESET key.
► Connect the DUT.
Start vector measurements.
► Press the MEAS key.
► Press the "Meas Mode" softkey.
► Select the "Vector" menu item.
Select the type of transmission measurement
► Press the "Result Display" softkey.
► Select the "Transmission Fwd (Port 12)" menu item for transmission
measurements in forward direction or "Transmission Rev (Port 12)" menu item
for transmission measurements in reverse direction.
Simultaneous display of several results
You can also display two results simultaneously in a single diagram. In that case, the
R&S FSH shows two traces with a different color in the result display.
► Press the MEAS key.
► Press the "Result Display” softkey.
► Select one of the result combinations to be displayed in a single diagram.
- Reflection S11 + S22
- Transmission S21 + S12
- Transmission / Reflection S21 + S11
- Transmission / Reflection S12 + S22
The information, which trace carries which result, is indicated by a label in the
diagram area.
Note that the simultaneous display of more than one result in a single diagram is
only possible with a high accuracy calibration.
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