Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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Common: MODulation[:PERRor] CMU-K20/21/22/23/24
1115.6088.12 6.68 E-12
Subsystem MODulation...:TIME
The subsystem MODulation...:TIME defines the decoding for the Modulation measurement. The
subsystem corresponds to the Decode hotkey in the graphical measurement menu Modulation.
CONFigure:MODulation[:PERRor][:GMSK]:TIME:DECode <Mode> Decode
<Mode> Description of parameters Def. value Def. unit FW vers.
STANdard |
GTBits The standard bit range is decoded
The guard and tail bits are also decoded GTBits – V2.15
Description of command
This command selects the type of decoding applied for the determination of phase and frequency errors.
Subsystem SUBarrays:MODulation[:PERRor][:GMSK]
The subsystem SUBarrays:MODulation[:PERRor][:GMSK] defines the measurement range and the type
of returned values.
CONFigure:SUBarrays:MODulation[:PERRor][:GMSK] <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 – V2.00
Description of command
This command configures the
READ:SUBarrays..., FETCh:SUBarrays...,
and
SAMPle:SUBarrays:MODulation[:PERRor][:GMSK]
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
parameter) 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[:PERRor][:GMSK]
measurement. Test points outside 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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