Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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Common: MODulation:PERRor CMU-K20/21/22/23/24
1115.6088.12 6.94 E-12
Subsystem SUBarrays:MODulation[:PERRor]:EPSK
The subsystem SUBarrays:MODulation defines the measurement range and the type of output values.
CONFigure:SUBarrays:MODulation[:PERRor]:EPSK
<Mode>,<Start>,<Samples>{,<Start>,<Samples>}
Definition of Subarrays
<Mode> Description of parameters Def. value Def. unit
ALL |
ARIThmetical |
MINimum |
MAXimum |
IVAL, Return all measurement values
Return arithm. mean value in every range
Return minimum value in every range
Return maximum value in every range
Return single interpolated value at <Start> ALL –
<Start> Description of parameters Def. value Def. unit
0 bit to 146 ¾ bit, Start time in current range 0 bit
<Samples> Description of parameters Def. value Def. unit FW vers.
1 to 588 Number of samples in current range 588 – V2.15
Description of command
This command configures the
READ:SUBarrays..., FETCh:SUBarrays...,
and
SAM-
Ple:SUBarrays:MODulation[:PERRor]:EPSK
commands. It restricts the measurement to up to 32
subranges where either all measurement results (the number of which is given by the second numerical parame-
ter) or a single statistical value is returned. The subranges are defined by the start time and the number of test
points which are located on a fixed, equidistant grid with a step width of ¼ bit. If <Start> does not coincide with a
test point then the range will start at the next test point that is larger than <Start>.
For <Mode> = IVAL, the <Samples> parameter is ignored and the CMU returns a single measurement value
corresponding to the abscissa value <Start>. If <Start> is located beween two test points with valid results then
the result is calculated from the results at these two adjacent test points by linear interpolation.
The subranges may overlap but must be within the total range of the Modulation measurement. Test points out-
side this range are not measured (result NAN) and do not enter into the ARIThmetical, MINimum and MAXimum
values.
By default, only one range corresponding to the total measurement range is used and all measurement values
are returned.
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