Keysight E6640A, Measurement Applications User & Programmer Reference

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13 Modulation Accuracy (Composite EVM) Measurement
Source
The ARB can only be turned on when there is a waveform file selected for playback. On the GUI If no
waveform is selected, this key is grayed out. If you send the SCPI command to turn the ARB on with
no waveform selected for playback, the ARB state remains OFF and an error is generated. “-
When you try to recall a certain set of states in which the selected waveform is not in ARB memory
and the ARB state is On, errors are reported
Preset Off
Range On | Off
Initial S/W Revision A.05.00
Select Waveform
Allows you to access to the waveform selection sub-menus.
Pressing this key changes the central view area to show the Waveform File Selection view.
Key Path
Source, Modulation Setup, ARB
Initial S/W Revision A.05.00
Select Waveform
Allows you to select a waveform sequence or segment for the dual ARB to play.
NOTE: Selecting a waveform file does not result in automatic adjustments to burst timing (to compensate
for the presence or absence of a Multiport Adapter); that adjustment occurs only when a waveform is
loaded to ARB memory. See "Load Segment to ARB Memory" for more information about this adjustment.
Key Path
Source, Modulation Setup, ARB, Select Waveform
Remote Command
:SOURce:RADio:ARB:WAVeform <string>
:SOURce:RADio:ARB:WAVeform?
Example :SOUR:RAD:ARB:WAV “test_waveform.bin”
Notes If intended waveform is not in the memory yet, then issuing this command by SCPI will invoke ARB
loading operation first, which involves a delay of unpredictable length. So this command should be
followed by the query *OPC?, which holds off subsequent commands until the loading operating is
complete.
<string> - specifies the name of the waveform segment or waveform sequence to be played by the
ARB.
When in Sequence Analyzer mode, and Include Source is Yes, if the you attempt to play a waveform
sequence but not all the required waveform segments are in the ARB playback memory, the
application will reject the loading operation with an error is generated .
When Include Source is No, if you attempt to play a waveform sequence but not all the required
waveform segments are contained in the ARB playback memory, the application will attempt to load
the required segments from either the default directory of the current directory. If the ARB memory
does not have enough space for all the waveform segments to be loaded, an error is generated and
W-CDMA & HSPA Measurement Applications Reference 2203