Y9071B Datasheet, PDF (20/29 Pages) Keysight Technologies – Measurement Applications For the E6640A EXM Wireless Test Set

20 | Keysight | Measurement Applications for the E6640A EXM Wireless Test Set - Solution Brochure
True MIMO
EXM offers True MIMO measurements for design and validation of multiple antenna
performance. EXM’s four independent TRXs make it easy to set up and quickly obtain
MIMO measurement results using trusted X-Series measurement science. EXM’s precise
time alignment across each TRX channel and high port-to-port isolation ensures
accurate MIMO measurement results. Each antenna in the DUT is connected to a
separate analyzer/source in the tester. EXM provides:
–– Multiple TRX for simultaneous test of all MIMO channels
–– Provides full set of MIMO metrics quickly; each channel is captured in parallel
–– Design and validate 802.11n and 802.11ac up to 4x4 MIMO devices
–– Multiple TRXs enable simultaneous test for up to 4x4 MIMO channels
–– Supports 802.11ac 20/40/80/160/80+80 MHz
–– Supports both Tx and Rx test for MIMO devices
–– Detailed measurement results per channel: EVM, power, SEM, cross talk, frequency
response, etc.
Switched MIMO
In contrast to True MIMO, Switched MIMO provides a much lower cost method for
obtaining a full set of MIMO performance metrics using just a single EXM TRX channel.
With any space time block code (STBC) and scrambling turned off, the EXM’s built-in
fast switching RFIO switches the DUT antennas in turn to the analyzer and captures
data sequentially from successive signal bursts. Keysight measurements reconstruct
the multiple MIMO streams and perform measurements. EXM’s quad-core processor
maximizes production throughput by bringing the speed penalty associated with
sequentially capturing data from the MIMO streams down to a barely perceptible level.
EXM provides:
–– Cost-effective solution to test MIMO performance
–– Built-in fast switching RFIO switches the DUT antennae in turn to the analyzer
–– Sequential capture from successive bursts
–– Detailed measurement results per stream and channel: RMS EVM, peak EVM, pilot
EVM, data EVM, IQ offset, frequency error, etc.
–– 802.11ac 20/40/80/160 MHz support
Figure 13. An EXM configured
with four TRX for testing 4X4
True MIMO