Common Measurement Settings
R&S
®
FSW
352
User Manual 1173.9411.02 ─ 19
6. Perform any measurement with the setup that contains the calibrated component.
The measurement results do not include the effects from the component.
How to Compensate for Additional Gain or Attenuation after Calibration
If a gain or an attenuation is inserted in the measurement after calibration, this effect
can be reflected in the display of the normalized trace on the R&S
FSW. Thus, the
measured trace and the normalized trace are not so far apart in the display, so that you
can zoom into the normalized trace without cropping the measurement trace.
Prerequisite: a calibration has been performed for the original measurement setup,
except for the component causing an additional gain or attenuation (as described in
"How to Calibrate a Measurement Setup using an External Generator"
1. Insert the additional component in the calibrated measurement setup and perform
a new measurement.
2. Press the INPUT/OUTPUT key and select "External Generator Config".
3. Switch to the "Source Calibration" subtab.
4. With active normalization, set the "Reference":"Value" to the same value as the
gain or attenuation the inserted component causes.
5. Optionally, shift the reference line further down in the result display by decreasing
the "Reference": "Position".
The normalized reference trace moves to the position of the measured trace.
6. Optionally, zoom into the measured trace by changing the y-axis scaling (or the
range: "AMPT > Scale Config > Range").
The measured trace is still fully visible, and the absolute values are still valid.
6.2.4.5
Measurement Example: Calibration with an External Generator
The following measurement example demonstrates the most common functions using
an external generator. This example requires the External Generator Control
(R&S
FSW-B10) option.
The example assumes an SMU06 generator is connected to the R&S
FSW. A band
elimination filter is the device under test. After calibration, an additional attenuator is
inserted between the DUT and the R&S
FSW.
The following procedures are described:
●
"Calibrating the measurement setup"
●
"Measuring the effects of the DUT"
●
"Compensating the effects of additional attenuation after calibration"
Calibrating the measurement setup
1. Connect the signal generator's GPIB interface connector to the EXT.
GEN.CONTROL GPIB connector on the rear panel of the R&S
FSW.
Data Input and Output
