92 Getting Started GuideXSA InterfaceTrue MIMOSource Settings for MIMOUnlike measurement settings, which are made only to the primary TRX andapplied to the others, source settings can be made separately for each TRX.However, it is possible to make certain source settings to other TRXs bymaking them to the primary TRX. Also, when the measurement is run, theprimary TRX communicates with the other TRXs to ensure that they beginplaying ARB files simultaneously.To run the sources synchronously:1. If there are any source settings which you don’t plan to make by way of theprimary TRX, begin by making them individually on each TRX which will beused in the MIMO test.2. Select the source synchronization type on the primary TRX which will beused in the MIMO test:— For 2x2 MIMO, set up source synchronization as follows: in theSource > Source Sync Control menu, select 2x2. Do this for bothTRXs. The equivalent SCPI command is::SOURce:SYNC:CONFig TWO— For 3x3 MIMO, set up source synchronization as follows: in theSource > Source Sync Control menu, select 3x3. Do this for all threeTRXs. The equivalent SCPI command is::SOURce:SYNC:CONFig THRee— For 4x4 MIMO, set up source synchronization as follows: in theSource > Source Sync Control menu, select 4x4. Do this for all fourTRXs. The equivalent SCPI command is::SOURce:SYNC:CONFig FOUR— For 2x2 + 2x2 MIMO, set up source synchronization as follows: in theSource > Source Sync Control menu, select 2x2+2x2. Do this for allfour TRXs. The equivalent SCPI command is::SOURce:SYNC:CONFig DTWO— For 1x1 + 1x1 MIMO, set up source synchronization as follows: in theSource > Source Sync Control menu, select 1x1+1x1. Do this for allfour TRXs. The equivalent SCPI command is::SOURce:SYNC:CONFig DONE3. In the window for the primary TRX, go to the Source > Source SyncControl > Sync Settings Setup menu and press Sync Settings [On]. Withthis feature enabled, certain settings for the primary TRX source(frequency, amplitude, waveform, trigger source, trigger type, and RFoutput) are also applied to the other TRX sources. The equivalent SCPIcommand is::SOURce:SYNC:SETT:ENAB ON4. For 1x1 + 1x1 MIMO or 2x2 + 2x2 MIMO, go to the Source > Source SyncControl > Sync Settings Setup > Segment 2 Setup menu and press SyncSegment 2 [On]. With this feature enabled, certain non-frequency settings
