3 Short-Range Comms & IoT Mode
3.8 SEM Measurement
Sweep Type Rules
Selects which set of rules will be used for automatic selection of "Sweep Type" on
page 1120 when Sweep Type mode is Auto.
Rule Option Description
Best
Dynamic
Range
DRANge
The instrument selects either swept or FFT analysis with the primary
goal of dynamic range optimization. If the dynamic range of swept
and FFT is very close, then it chooses the faster one. In determining
the Swept or FFT setting, the auto rules use the following approach:
–
If the RBW > 210 Hz, use swept; for the RBW <= 210 Hz, use
FFT
–
If Sweep Time Mode is Man, the Sweep Type is always Swept for
backwards compatibility
Best Speed
SPEed
The instrument selects either FFT or swept analysis based on the
fastest instrument speed
Remote Command
[:SENSe]:SEMask:SWEep:TYPE:AUTO:RULes SPEed | DRANge
[:SENSe]:SEMask:SWEep:TYPE:AUTO:RULes?
Dependencies In modular products such as VXT, the value is always set to Best Dynamic Range and this control does
not appear
Preset
DRANge
State Saved Saved in instrument state
Spur Avoidance
Because VXT models M9410A/11A/15A are direct-conversion (zero-IF) receivers,
feedthrough leakage from the local oscillator appears as a spurious signal (spur) at
the Center Frequency. The Spur Avoidance function is provided to eliminate this
spur, at the expense of some measurement speed. For Spur Avoidance, the
instrument uses a software algorithm to remove this spur from the displayed
measurement data.
Some measurements allow you to turn off Spur Avoidance, but in this measurement
it is always enabled. Therefore, the Spur Avoidance switch is unavailable (grayed-
out) and set to ON.
If you press the grayed-out switch, a popup message appears stating:
Always enabled in this measurement. See manual for details
Remote Command
[:SENSe]:SEMask:SAVoid[:STATe]?
Example
:SEM:SAV?
Short Range Comms & IoT Mode User's &Programmer's Reference 1097
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