Chapter 7 SCPI
Command subsystem overview
226 WCDMA Options Version 6.20
Command subsystem overview
This subsection provides information about the SCPI command subsystems.
The Measurement subsystems – MEASure, FETCh, CALCulate
Measurement device configuration subsystems – RFGenerator, RFSPectrum,
RFANalyser, AFGenerator, AFANalyser, MS Power Supply
The Node B and UE parameter subsystems – CONFigure, CALL
The communication-related subsystems – PROGram, STATus, SYSTem, FORMat
SCPI command errors
Using the SCPI commands The various SCPI commands and their arguments/parameters are described
below. Please note that any SCPI command specified with an invalid of without
an argument required will be totally ignored by the system. This means that an
incomplete SCPI command will not affect the current system status at all.
Schematic view of the
subsystems of the 4400
This is a very simplified schematic view of the control and data flow inside the
4400.
serial poll Controller identifies SRQ device
to SYST:MESS? Controller queries system message
from “RX Calibration
OK”
4400 confirms successful RX cali-
bration
to :MEA-
Sure:GSM:RFTX:ALL
Start relevant RFTX measurements
serial poll Controller identifies SRQ device
to :CALC:GSM:RFTX
:ALL:LIM:FAIL?
Controller queries the result of the
limit check of the measurement
result values
from 0,0,1,0,0,0,0,0
,0,0,0,0,0,0,0,0,
0,0,0
4400 delivers results
to/
from
4400
Data Comment
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