LTE Multi Evaluation Measurement
R&S
®
CMW-KM5xx/-KS5xx
575
User Manual 1173.9628.02 ─ 16
3.4.1.7
Single-Shot and Continuous Measurements
// *****************************************************************************
// Start single-shot measurement, return magnitude error bar graph values.
// Return maximum magnitude error and phase bar graph values
// (without repeating the measurement).
// Query the measurement state (should be "RDY").
// *****************************************************************************
INIT:LTE:MEAS:MEValuation
FETCh:LTE:MEAS:MEValuation:MERRor:CURRent?
FETCh:LTE:MEAS:MEValuation:MERRor:MAXimum?
FETCh:LTE:MEAS:MEValuation:PERRor:MAXimum?
FETCh:LTE:MEAS:MEValuation:STATe?
// *****************************************************************************
// Start continuous measurement and wait for 5 s.
// Return average EVM bar graph results.
// Query measurement state and substates (should be "RUN,ADJ,ACT").
// *****************************************************************************
CONFigure:LTE:MEAS:MEValuation:REPetition CONTinuous
INIT:LTE:MEAS:MEValuation
Pause 5000
FETCh:LTE:MEAS:MEValuation:EVMagnitude:AVERage?
FETCh:LTE:MEAS:MEValuation:STATe:ALL?
3.4.2 Using LTE List Mode
The LTE multi evaluation list mode is programmed as follows:
●
The measurement is controlled by SCPI commands with the following syn-
tax:
...LTE:MEAS:MEValuation:LIST...
●
Use general commands of the type
...:LTE:MEAS...
(no
:MEValuation
mne-
monic) to define the signal routing and perform RF and analyzer settings.
●
After a
*RST
, the measurement is switched off and list mode is disabled. Use
CONFigure:LTE:MEAS:MEValuation:LIST ON
to enable the list mode and
INIT:LTE:MEAS:MEValuation
to initiate a single-shot measurement.
●
Use
FETCh:LTE:MEAS:MEValuation:LIST:...?
commands to retrieve the
results.
Speeding up list mode measurements
List mode tests are often used in production lines. The same tests are repeated again
and again for different UEs. Optimizing the test duration is important.
Consider the following rules to minimize the test duration:
●
Reduce the number and size of the segments and the statistical length as far as
possible for your use case.
●
Enable only the results that you need / disable the other result calculations.
Programming
深圳德标仪器
135-1095-0799