WILLTEK 4403 - Page 274

Chapter 7 SCPI
The Measurement subsystems
252 WCDMA Options Version 6.20
– defining single or complex limits, using the [:DATA] command element of
the
CALCulate subsystem and
– reading out the results of the limit checks, using the
:LIMit[:FAIL]?
query.
The limit evaluation system can be switched on or off for every single measure-
ment parameter using the
:LIMit:SATe command element.
[:DATa] - customize or query limits
[:FAIL]? - pass/fail result query
:STATe - switch limit evaluation on/off
Syntax
CALCulate<{measProp}>:LIMit<{limType}>[:DATa] <Val>
Parameters
limType is a placeholder for :UPPer or :LOWer.
Val is the numeric value (floating) for the limit of the specific measurement param-
eter.
Description
Sets or queries the limit value(s) for the limit identified with limType.
The limit evaluation will check the measurement results obtained against the limits
set, using this command.
Note: Some measurement types have more complex limits (such as the power/time
template or the modulation spectrum). Please find a detailled explanation on those
complex limits in subsection “Working with complex limits” on page 253.
Examples
:CALCulate:GSM:RFTX:PRMS:LIMit:UPPer:DATa 4.00
Sets the upper limit of the RMS phase error to 4.00.
:CALC:GSM:RFTX:PPEA:LIM:UPP?
Queries the currently set upper result limit for the peak phase error. The value will be
returend as floating in the result string like 6.35.
Syntax
CALCulate<{measProp}>:LIMit[:FAIL]?
Returns
A boolean value or array (dependent on the type of measurement as defined by
measProp).
When all measurements of a type are within the limits, a 0 (pass) will be returned. if
at least one mesaurement result is beyond the limits, a 1 (fail) will be returend.
Description
Checks whether any of the current measurement(s) failed to meet the limits. The type
of measurement is defined by measProp.
Examples
MEASure:GSM:ARRay:RFTX:POWer 10
Starts a series of 10 measurements of the RF peak power.
CALCulate:GSM:RFTX:POWer:LIMit:FAIL?
This command reads out the result of the 10 measurements checked against the limit.
When all 10 measurement results are within the limits, a single 0 will be returned.
If one or more measurement results are beyond the limits, a single 1 will be returned.
Syntax
CALCulate<{measProp}>:LIMit:STATe <limState>
Parameters
limState is either ON or OFF.