3 VMA Mode
3.9 SEM Measurement
Max Sweeping hardware: 10 s
Non-sweeping hardware: N/A
Min/Max Depends on "Sweep Type" on page 1504:
Sweep Type Min/Max
Swept 1ms/10 s
FFT 100ns/10 s
Minimum Acquisition Time
Available on non-sweeping hardware.
Specifies the minimum acquisition time for each “chunk” of the measurement result.
The instrument automatically divides Span into multiple chunks if needed.
Therefore, the total signal acquisition time for the entire offset span is:
~(>~Minimum Acquisition Time) * (The number of chunks).
When in Auto, this parameter’s value is determined by other parameters, such as
Offset Start, Offset Stop, RBW and VBW.
You can manually increase this parameter value from this Auto value.
If increased, the instrument acquires signal for the specified time duration for each
chunk. It performs additional FFTs, and averages or peak-holds the FFT results for a
chunk, depending on Detector settings.
Note that the actual acquisition time for each chunk may exceed the Minimum
Acquisition Time value, in order to satisfy FFT time required by other parameters,
and to perform an integer number of FFTs.
Remote Command
[:SENSe]:SEMask:OFFSet[1]|2:INNer:LIST:SWEep:ACQuisition:TIME <time>, …
[:SENSe]:SEMask:OFFSet[1]|2:INNer:LIST:SWEep:ACQuisition:TIME?
[:SENSe]:SEMask:OFFSet[1]|2:INNer:LIST:SWEep:ACQuisition:TIME:AUTO ON | OFF
| 1 | 0, …
[:SENSe]:SEMask:OFFSet[1]|2:INNer:LIST:SWEep:ACQuisition:TIME:AUTO?
Example
:SEM:OFFS2:INN:LIST:SWE:ACQ:TIME 1.0 ms, 3.4 ms, 2.08 ms, 1.0 ms, 1.0 ms,
1.0 ms
:SEM:OFFS2:INN:LIST:SWE:ACQ:TIME?
:SEM:OFFS2:INN:LIST:SWE:ACQ:TIME:AUTO ON, ON, ON, ON, OFF, OFF
:SEM:OFFS2:INN:LIST:SWE:ACQ:TIME:AUTO?
Dependencies Available only on non-sweeping hardware
Couplings Coupled to Offset Start Freq, Offset Stop Freq, RBW, and VBW when in the Auto state
When you manually set a value while in Auto, the state automatically changes to Man
Vector Modulation Analyzer Mode User's &Programmer's Reference 1534
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