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Operating Tasks
Port Configuration
Configuration Examples (True MIMO)
In WLAN mode, True MIMO (simultaneous rather than switched MIMO) is
supported for the MIMO Modulation Analysis measurement. (This functionality
is not available in Sequence Analyzer mode.) Setting up this type of
measurement requires configuration of two separate TRXs. (See the WLAN
Mode help files for more information about this measurement.)
For MIMO Modulation Analysis, two or more measurement data streams are
captured simultaneously, by two or more separate TRXs in the E6680A. In the
E6680A, the TRXs share a common frequency reference. They also share a
common IP address, but have separate socket numbers. In MIMO testing, a
single TRX is designated the primary, and it controls the other TRX or TRXs
used.
For the MIMO Modulation Analysis measurement, go to the Meas Setup >
MIMO Type menu and select 2x2, 3x3, or 4x4. (This setting determines
whether the display shows two, three, or four constellation diagrams for the
measurement.) The equivalent SCPI command is:
[:SENSe]:EVMMimo:TYPe M2M2|M3M3|M4M4
Here is an example of 2x2 MIMO:
Figure 5-23
2X2 true MIMO connections
In the example setup shown here, TRX 1 runs the MIMO Modulation Analysis
measurement, and is also configured to control TRX 2, which collects the
second data stream. The primary TRX controls the measurement settings for
the secondary TRX, and also processes the measurement data collected by the
secondary. (The display window for the secondary will display a mostly-blank
screen, with a message indicating that it is in use by the primary.)
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Getting Started Guide
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