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Operating Tasks
Port Configuration
Configuration Examples (Switched MIMO)
For WLAN modulation accuracy measurements, a form of MIMO measurement
can be made with a single TRX, using a time-division multiplexing process. The
same source/analyzer pair within the TRX switches between the antenna ports
of the Device Under Test.
In contrast to true MIMO functionality, which is available in WLAN mode but
not in Sequence Analyzer mode, the switched MIMO feature is a WLAN
measurement which is available only in Sequence Analyzer mode. (See the
Sequence Analyzer Mode help files for more information about this
measurement.)
For 2x2 MIMO, the RFIO 2 and RFIO 4 ports are configured as Rx ports (that is,
input ports); they capture the data stream from the first and second antenna
ports of the DUT.
The RF Input Port Mode must be set to List, so that the sequence can change
the input port path from one acquisition to the next. In the Meas Setup > RF
Input Port Mode menu, select List. The equivalent SCPI commands is:
[:SENSe]:LSEQuencer:PORT:INPut:MODE LIST
Figure 5-21
2X2 switched MIMO connections
For 2x2 switched MIMO in Sequence Analyzer mode, two separate acquisitions
are used for the two separate ports, and must be integrated. Set up acquisition
integration as follows: in the Meas Setup > Acquisition Setup > Acquisition
Integration menu, select Primary for the first acquisition and Switch MIMO for
the second. The equivalent SCPI commands are:
[:SENSe]:LSEQuencer:ACQuire{1:512}:SETup:INTegration PRIMary
[:SENSe]:LSEQuencer:ACQuire{1:512}:SETup:INTegration SMIMo
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Getting Started Guide
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