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ACP Measurement
Sweep/Control
Sweep/Control
Accesses a menu of functions that enable you to set up and control the sweep time, and source.
See “Sweep/Control” on page 1267 for more information
Sweep Time
Selects the length of time in which the test set sweeps the displayed frequency span. In swept spans, the
sweep time varies from 1 millisecond to 2000 seconds. Additional overhead time, which impacts the
sweep rate, is not calculated as part of the sweep time. In fact:
sweep rate = span/sweep time
update rate = 1/(sweep time + overhead)
sweep cycle time = sweep time + overhead
Sweep time is coupled to RBW and VBW, and is impacted by the number of sweep points, so changing
those parameters may change the sweep time.
If you increase the sweep time, you increase the length of the time data captured and the number of
points measured. You might need to specify a specific sweep speed to accommodate a specific condition
in your transmitter. For example, you may have a burst signal and need to measure an exact portion of
the burst.
Selecting a specific sweep time may result in a long measurement time since the resulting number of data
points my not be the optimum 2n. Use [:SENSe]:ACP:OFFSet:LIST:SWEep:TIME to set the number of
points used for measuring the offset channels for Basic and cdmaOne.
For cdma2000 and W-CDMA, this command sets the sweep time when using the sweep mode. See
[:SENSe]:ACP:SWEep:TYPE
Key Path Front-panel key
Initial S/W Revision Prior to A.02.00
Key Path
Sweep/Control
Mode WCDMA, C2K, WIMAX OFDMA, TD-SCDMA, 1xEVDO, LTE, LTETDD
Remote Command [:SENSe]:ACPower:SWEep:TIME <time>
[:SENSe]:ACPower:SWEep:TIME?
[:SENSe]:ACPower:SWEep:TIME:AUTO OFF|ON|0|1
[:SENSe]:ACPower:SWEep:TIME:AUTO?
Example ACP:SWE:TIME 50ms
ACP:SWE:TIME?
ACP:SWE:TIME:AUTO OFF
ACP:SWE:TIME:AUTO?