WILLTEK 4400 Mobile Phone Tester Series, Руководство пользователя

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Appendix A SCPI Command Reference
FETCh Subsystem
4460 GSM System Option and 4468 EDGE System Option Version 12.20
595
:FETCh:EGPRs:RFTX:ALL?
:FETCh:EGPRs:RFTX:ERMS?
Syntax
:FETCh:EGPRs:RFTX:ALL?
Parameters
There are no parameters.
Description
There is solely a query form of this command available.
Query
The query form of this command will return the latest measurement result values of
the
:MEAS:EGPR[:ARR]:RFTX:ALL
measurement. The string delivered back
will contain 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 undesire leakage produced due to a DC offset in the phones I/Q modu-
lator. It is measured in dBc,
5.
FREQuency
, floating point real number representing the mobile's frequency
error,
6.
LENGth
, floating point real number representing the length of the burst in micro-
seconds,
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's RF output power level
in dBm,
9.
TEMPlate
boolean number.
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 pre-defined positions of a burst.
Example
:MEAS:EGPR:RFTX:ALL
:FETC:EGPR:RFTX:ALL?
This example will return the latest measurement result values for the 17 most impor-
tant EGPRS RF TX measurements. The string delivered back in this example is:
"5.13,11.94,3,12,4.54,-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"
.
Syntax
:FETCh:EGPRs:RFTX:ERMS?
Parameters
There are no parameters.
Description
There is solely a query form of this command available.
Query
The query form of this command returns the latest measurement result value(s) of the
MEAS:EGPR[:ARR]:RFTX:ERMS
measurement. The string delivered back will
contain at least one floating point real number with the physical dimension of %.