WILLTEK 4400 Mobile Phone Tester Series, Руководство пользователя

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Chapter 8 SCPI
The Measurement subsystems
354
4460 GSM System Option and 4468 EDGE System Option Version 12.20
Example:
First a BER measurement command is issued to start a BER measurement
(because it takes some time).
Then several RF TX measurements are performed and the measurement results
are read out and used for statistic data evaluation.
After that the result of the BER measurement is read out.
Important notes:
– A newly issued RF TX MEASure command will terminate any RF TX or RF
spectrum measurements currently in progress.
– A newly issued RF SPectrum MEASure command will terminate any RF TX or
RF spectrum measurements currently in progress.
– A newly issued RF RX MEASure command will terminate any RF RX measure-
ments currently in progress.
– A newly issued AF MEASure command will terminate any RF TX, RF RX, RF
spectrum or AF measurements currently in progress.
– Measurements are always started, using the current system parameters and
the current state of the 4400.
– In case the 4400 is in a state that does not allow a specific measurement
command to be performed or completed, an error message will be added to
the 4400’s internal error queue. The related flag in
The STATus subsystem
will be set, too.
In case this is the first error message to appear within the error queue, the
error indicator bit of the service register (bit 2) will be set as well.
:MEASure[:CONTinuous] MEASure commands that are stated with or without the optional
:CONTinuous
command element will make the 4400 perform the related measurement for an
unlimited number of times.
The measurement will only be terminated if a new MEASure command of the
same or related type is issued (see
Notes above).
Series :ARRay This command element offers the possi-
bility to carry through a specific mea-
surement a certain number of times. All
the single measurement result values
can be read out with just one command.
Using this feature, measurement results
returned can then be used e.g. for sta-
tistic data evaluation on an external
computer.
Syntax
:MEASure[:CONTinuous]<{:measProp}>[?]
Parameters
The one-shot measurements do not require any parameters.