Rohde & Schwarz CMU-K20, Operating Manual

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Common: MODulation:XPERror CMU-K20/21/22/23/24
1115.6088.12 6.72 E-12
MODulation:XPERror
The subsystem MODulation:XPERror[:GMSK] measures the modulation parameters (frequency and
phase errors) in GMSK modulation including the I/Q Imbalance and the Origin Offset in the I/Q
constellation diagram. The subsystem corresponds to the measurement menu
Modulation, application
Ext. Phase Err. GMSK, and the associated popup menu Modulation Configuration.
If no results for the I/Q Imbalance and the Origin Offset are needed, it is recommended to use the faster
MODulation[:PERRor] measurement; see p. 6.64 ff.
Control of Measurement – Subsystem MODulation:XPERror[:GMSK]
The subsystem MODulation:XPERror[:GMSK] controls the modulation measurement. It corresponds to
the softkey Ext. Phase Err. GMSK in the measurement menu Modulation .
INITiate:MODulation:XPERror[:GMSK] Start new measurement
⇒
RUN
ABORt:MODulation:XPERror[:GMSK] Abort running measurement and switch off
⇒
OFF
STOP:MODulation:XPERror[:GMSK] Stop measurement after current stat. cycle
⇒
STOP
CONTinue:MODulation:XPERror[:GMSK] Next measurement step (only stepping mode )
⇒
RUN
Description of command FW vers.
These commands have no query form. They start and stop the modulation measurement, setting it
to the status indicated in the top right column. V2.15
CONFigure:MODulation:XPERror[:GMSK]:EREPorting < Mode > Event Reporting
<Mode> Description of parameters Def. value Def. unit FW vers.
SRQ |
SOPC |
SRSQ |
OFF Service request
Single operation complete
SRQ and SOPC
No reporting
OFF – V2.15
Description of command
This command defines the events generated when the measurement is terminated or stopped (event reporting,
see chapter 5 of CMU manual).
FETCh:MODulation:XPERror[:GMSK]:STATus? Measurement Status
Ret. values Description of parameters Def. value Def. unit FW vers.
OFF |
RUN |
STOP |
ERR |
STEP |
RDY,
1 to 10000 |
NONE,
1 to 1000 |
NONE Measurement in the OFF state (
*RST
or
ABORt
)
Running (after
INITiate, CONTinue
or
READ
)
Stopped (
STOP
)
OFF (could not be started)
Stepping mode (<stepmode>=STEP)
Stopped according to repetition mode and stop condition
Counter for current statistics cycle
No counting mode set
Counter for current evaluation period within a cycle
Statistic count set to off
OFF
NONE
NONE –
–
– V2.15
Description of command
This command is always a query. It returns the status of the measurement (see chapters 3 and 5 of CMU
manual).
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