R&S ESU Series, Operating Manual, Page: 82 / 855

Operating Manual 1302.6163.12 - 03 4.51
R&S ESU Instrument Functions
Receiver Mode
4.5.5 Frequency Scan and Time Domain Scan – SWEEP Key
4.5.5.1 Stepped Scan in the Frequency Domain
In the scan mode, R&S ESU measures in a predefined frequency range with select-
able step width and measurement time for each frequency.
Either the current receiver settings or the settings defined in the Scan table are
used. Up to 10 subranges which need not be next to each other can be defined
within one scan. The subranges are then scanned by R&S ESU one after the other.
Measurement ranges should not overlap. The parameters to be measured in each
subrange can be selected independently (
SWEEP menu, SCAN TABLE table).
Transducer factors or transducer sets and limit lines can be defined and displayed
separately and are not part of the scan data record.
The scanned frequency range is defined by the start and stop frequency set inde-
pendently of the scan table (
SCAN TABLE table or FREQUENCY menu). A scan
table can thus be defined for each measurement task, which can be stored and
reloaded. The required frequency range can be defined by means of two parameters
which can be set via keys so that no elaborate editing has to be done in the scan
table.
Fig. 4.23 Definition of scan range
Scanning is started with the RUN SCAN softkey. The scan can be performed as a
single scan or continuously. In the case of single scan it is stopped when the stop
frequency is reached. The continuous scan can be interrupted with the
HOLD SCAN
softkey or terminated with the STOP SCAN softkey.
The maximal number of measured frequencies is limited to 2.000.000. A maximum
of 3 x 2.000.000 values (2.000.000 per detector) can be stored for postprocessing. If
the scan subranges are defined so that more than the possible values would be
measured, a respective message is output upon the scan start. Afterwards the scan
is performed up to the maximum value.
At least one scan is defined in the list. Two subranges are defined in the default
setup. All other parameters are shown in the following table:
scan ranges
transducer set
start frequency stop frequency