Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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CMU-K20/21/22/23/24 Common: MODulation:XPERror
1115.6088.12 6.77 E-12
Measured Values – Subsystem MODulation:XPERror[:GMSK]
The subsystem MODulation:XPERror[:GMSK] measures and returns the modulation results and
compares them with the tolerance values. The subsystem corresponds to the various output elements
in the graphical measurement menu
MODulation:XPERror[:GMSK].
Scalar Results:
READ[:SCALar]:MODulation:XPERror[:GMSK]? Start single shot meas. and return results
FETCh[:SCALar]:MODulation:XPERror[:GMSK]? Read out meas. results (unsynchronized)
SAMPle[:SCALar]:MODulation:XPERror[:GMSK]? Read out meas. results (synchronized)
Returned values Value range Def. value Def. unit FW vers.
Phase Err. Peak Current,
Phase Err. Peak Average,
Phase Err. Peak MaxMin,
Phase Err. RMS (x3),
Origin Offset (x3),
I/Q Imbalance (x3),
Frequency Error (x3),
AvgBurstPowerCurr,
BurstsOutOfTol
Phase of Origin Offset Vector –100.0° to +100.0°
–100.0° to +100.0°
–100.0° to +100.0°
–100.0° to +100.0°
–100.0 dB to +100.0 dB
–100.0 dB to +100.0 dB
–1000.0 Hz to +1000.0 Hz
–137 dBm to +53 dBm
0.0 % to 100.0 %
–180° to +180° NAN
NAN
NAN
NAN
NAN
NAN
NAN
NAN
NAN
NAN deg
deg
deg
deg
dB
dB
deg
dBm
%
deg V2.15
Description of command
These commands are always queries. They start a measurement and return all scalar measurement results (see
chapter 5). The symbol (x3) behind a value indicates that the list contains three results corresponding to the
Current , the Average, and the MMAX curve.
The phase of the origin offset vector, which is measured relative to the phase of the 3
rd
test point in the
Modulation trace (bit ½), can be retrieved in remote control only. The origin offset vector in the I/Q plane is thus
completely determined by its phase and its magnitude (i.e. the quantity Origin Offset) .
The calculation of results in an average or peak measurement is described in chapter 3 (cf. calculation of
statistical quantities ).
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