3 VMA Mode
3.9 SEM Measurement
NOTE
On non-sweeping hardware, this control is grayed-out. The value shown on this
control is an estimate, which is the turnaround time to complete the
measurement of the entire carrier span, which is the sum of signal acquisition
time, FFT time, and other overhead time. If you need to specify the same Sweep
Time as you would for sweeping hardware, send [:SENSe]:SEMask:SWEep
[1]|2:TIME <time>. The measurement emulates the Sweep Time effect, but
this emulation is not straightforward, and therefore the behavior is not specified.
Instead, we recommend using "Minimum Acquisition Time" on page 1552, which
provides better control.
Remote Command
[:SENSe]:SEMask:SWEep[1]|2:TIME <time>
[:SENSe]:SEMask:SWEep[1]|2:TIME?
[:SENSe]:SEMask:SWEep[1]|2:TIME:AUTO OFF | 0 | ON | 1
[:SENSe]:SEMask:SWEep[1]|2:TIME:AUTO?
Example
:SEM:SWE:TIME 9ms
:SEM:SWE:TIME?
:SEM:SWE:TIME:AUTO OFF
:SEM:SWE:TIME:AUTO?
Notes Sub op code 1 is for BTS, 2 for MS. Default is BTS
Note that Sweep sub op code 2 is supported only in non-SA Modes. In SA Mode, Sweep sub op code 1
is used for both BTS and MS
Dependencies On non-sweeping hardware, this control is grayed out and the Auto/Man checkbox is invisible. The
read-only value shows the estimated sweep time
In those instruments, "Minimum Acquisition Time" on page 1552 is available
Couplings When the time is set manually, Auto is set to OFF
If state is Auto, coupled with Channel Detector selection, Channel Resolution BW, Channel Video BW
When set to Auto, the Time is automatically calculated
Preset Automatically calculated
ON
State Saved Saved in instrument state
Yes
Range
OFF|ON
Min Sweeping hardware
Depends on Channel "Sweep Type" on page 1553:
Sweep Type Min
Swept 1 ms
FFT 100 ns
Non-sweeping hardware: N/A
1551 Vector Modulation Analyzer Mode User's &Programmer's Reference
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