3 Short-Range Comms & IoT Mode
3.8 SEM Measurement
Radio Std Presets
802.11j/p (10 MHz) 9 MHz
802.11p (5 MHz) 4.5 MHz
802.11ax/be (20 MHz) 19.5 MHz
802.11ax/be (40 MHz) 39.0 MHz
802.11ax/be (80 MHz) 79.0 MHz
802.11ax/be (160 MHz) 159.0 MHz
802.11be (320 MHz) 319.0 MHz
802.11ax (80 MHz + 80 MHz) 320.0 MHz
802.11af (6 MHz) 5.7 MHz
802.11af (7 MHz) 6.65 MHz
802.11af (8 MHz) 7.6 MHz
Sweep Time
Used to calculate the power in the reference channel. Sweep Time can be set
manually or put into Auto mode.
For instruments with non-sweeping acquisitions, such as VXT, the time value is the
acquisition time for an individual FFT segment, not the cumulated time for all FFT
segments in the channel.
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 1166, 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?
Short Range Comms & IoT Mode User's &Programmer's Reference 1165