2201R Mobile Tester SCPI Reference Guide
Chapter 10 Measurement commands
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:MEASure:EGPRs[:CONTinuous]:RFTX:ALL
Syntax
:MEASure:EGPRs[:CONTinuous]:RFTX:ALL
Parameters
There are no parameters.
Description
Starts a continuous measurement of the most important EGPRS RF TX tests. To read out the latest measurement
results, use the :FETCh:EGPRs:RFTX:ALL command. The RF TX tests performed by this command are:
ERMS, the error vector magnitude rms-averaged over a burst.
EVM is a relative value and shown as a percentage.
EPEAk, the maximum error vector magnitude within a burst.
EVM is indicated in per cent.
ENFTh, the error vector magnitude that is not exceeded by 95% of the symbols of a burst. The 95% EVM is shown in %.
EOFFset, the origin offset indicates the accuracy of the i/Q modulators DC setup; it is usually an undesired leakage
produced due to a DC offset in the phones I/Q modulator. It is measured in dBc, FREQuency means the frequency
error of the mobile under test.
LENGth the length of the burst in microseconds.
UTIMe stands for the timing error of the mobile under test in microseconds (taking the ordered timing advance into
account).
POWer is the mobile RF output power level in dBm.
TEMPlate indicates whether the power-time template has been violated by a burst or not.
CORNer gives the RF power level in dBm at eight predefined positions of a burst.
Notes: Please keep in mind that the start of a new RF TX test always terminates the preceding one instantly. For
further details regarding group measurements and their specific advantages, refer to section :MEAS:...:GROup. For a
further description of the single measurements, see description of the related commands below.
Query
The query form of this command starts the measurements and - after all measurements have been completed and
all measurement results obtained - delivers a string, containing 17 measurement result values, separated with
commas. The order and type of these measurement result values delivered back is as follows:
1. ERMS, the error vector magnitude rms-averaged over a burst. EVM is a relative value and shown as a percentage,
2. EPEAk, the maximum error vector magnitude within a burst. EVM is indicated per cent,
3. ENFTh, the error vector magnitude that is not exceeded by 95% of the symbols of a burst. The 95% EVM is shown
in %,
4. EOFFset, the origin offset indicates the accuracy of the i/Q modulators DC setup; it is usually an undesired leakage
produced due to a DC offset in the phones I/Q modulator. It is measured in dBc,
5. FREQuency, floating point real number representing the mobile frequency error,
6. LENGth, floating point real number representing the length of the burst in microseconds,
7. UTIMe, floating point real number representing the timing error of the mobile under test in microseconds (taking
the ordered timing advance into account),
8. POWer, floating point real number representing the mobile RF output power level in dBm,
9. TEMPlate boolean number. A 0 indicates that the power-time template (PTT) was not violated by the last burst
measured, while a 1 means that the burst did violate the PTT.
10...17. CORNer, eight floating point real numbers, representing the RF power level in dBm at eight predefined
positions of a burst.
Example
:MEASure:EGPRs:CONTinuous:RFTX:ALL?
In this case, all relevant EGPRS RF TX measurements are performed in a sequence. As soon as all measurements have
been completed and all measurement results obtained, a string is delivered back containing 17 measurement results:
"5.13,11.94,2.43,4.55,-2.22,557.0,0.1,11.22,0,-72.18, -61.91,-20.91,-0.05,-0.04,-17.97,-56.60, -73.95".
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