Programming Examples 15
U8480 Series Programming Guide 363
Power Sweep Operation
The power sweep feature is used when you make a measurement in which the
signal varies in amplitude. In power sweep, the U8480 Series will use the 50 MHz
frequency table as default for all measurements.
The SENS:FREQ? query can be used to check for the current frequency table in
use. The power sweep feature is to be used in conjunction with an external trigger.
When a trigger is sent to the U8480 Series, the U8480 Series will acquire a
measurement. With a maximum buffer size of 250, you can capture up to 250
readings in the power sweep mode.
For each measurement, you can opt to set the filter length.
For example, if the filter length is set to 128, the U8480 Series will take up to 128
readings and perform averaging, to acquire one reading for the power sweep.
To check if the power sweep operation has completed, first of all, you will have to
enable the OPC feature by issuing the *OPC command. When the *ESR? query is
issued for the first time, the returned value will not be 0. However, when the
*ESR? query is issued for the second time, its returned value will be cleared to 0. If
the subsequent *ESR? returns a 1, this indicates that the power sweep operation
has completed.
Enabling the OPC feature will cause the OPC bit in the ESR to be set when the
power sweep operation has completed. If the OPC feature is not enabled, the
OPC bit in the ESR will not be set when the power sweep operation has
completed.
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