R&S FSH3 Measurements on CW Signals
Two Port Transmission measurements
(only for R&S FSH3 with tracking generator: order No. 1145.5850.13 or 1145.5850.23).
For measurement of the gain or attenuation of two port devices the R&S FSH3 provides a tracking
generator. It generates a sinewave signal at exactly the receive frequency of the Spectrum Analyzer.
¾ Press the MEAS key.
¾ Press the MEASURE softkey.
The measurement function menu opens.
¾ Using the Cursor keys or the Rotary knob, select the TRACKING GEN menu item and confirm your
selection with the ENTER key or the MEAS softkey.
The R&S FSH3 turns on the tracking generator and switches to its softkey menu.
When the tracking generator is switched on, the R&S FSH3 displays Track Gen Uncal . This indicates
that tracking generator measurements are uncalibrated.
Before calibration, the frequency range you want should be set because calibration is only valid for the
calibrated frequency range. Changing the frequency settings after calibration invalidates calibration.
¾ Press the FREQ key.
¾ Using the number keys enter the Center Frequency.
¾ Press the SPAN key.
¾ Using the number keys, enter the span.
Alternately the Start and Stop Frequency can be input using the START and STOP softkey in the
frequency menu.
Calibrate the R&S FSH3 for the transfer function measurement.
¾ Press the MEAS key.
¾ Press the TRANSM CAL softkey.
The R&S FSH3 now prompts you to connect the RF
input to the tracking generator’s output so that
calibration can be carried out.
¾ Connect the RF output to the generator’s input
without the DUT.
¾ Press the CONTINUE softkey to start calibration.
During calibration the R&S FSH3 outputs the message
"Calibrating THROUGH, please wait..".
When calibration is over, the R&S FSH3 outputs the
message "Transm. calibrated" for 3 seconds.
1145.5973.12 2.9 E-6
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