Operating Manual 1302.6163.12 - 03 4.329
R&S ESU Instrument Functions
Tracking Generator – Option R&S FSU-B9
4.10.5 Frequency-Converting Measurements
For frequency-converting measurements (e.g. on converter units) the tracking gen-
erator is able to set a constant frequency offset between the output frequency of the
tracking generator and the receive frequency of the R&S ESU.
Up to an output frequency of 200 MHz the measurement can be carried out in both
inverted and normal positions.
Fig. 4.27 Test setup for frequency converting measurements
FREQUENCY
OFFSET
The FREQUENCY OFFSET softkey activates the input of the frequency offset
between the output signal of the tracking generator and the input frequency of the
R&S ESU. Possible offsets are in a range of ±200 MHz in 0.1 Hz steps.
The default setting is 0 Hz. Offsets <> 0 Hz are marked with the enhancement label
FRQ.
If a positive frequency offset is entered, the tracking generator generates an output
signal above the receive frequency of the R&S ESU. In case of a negative frequency
offset it generates a signal below the receive frequency of the R&S ESU. The output
frequency of the tracking generator is calculated as follows:
Tracking generator frequency = receive frequency + frequency offset.
Remote command: SOUR:FREQ:OFFS 50MHz
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