Rohde & Schwarz R&S AMS32-K31, Руководство пользователя

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Noise-Limited OTA Performance in Transmit Diversity Mode
R&S
®
AMS32-K31
19 User Manual 1175.6678.02 ─ 01
measurement points or double-click in order to set markers and retrieve numeric
results.
Fig. 2-6: Example of a CDF graph
According to the test case specification, the CDF serves as the overall figure of merit
for the EUT. CDF(x dBm) = y % means that y % of all sensitivity thresholds (measured
at arbitrary angles) are
≤
x dBm. In the example above, all measured sensitivity
thresholds are
≤ –
95 dBm, but none of them was found to be
≤ –
106 dBm.
The lower the recorded sensitivity threshold levels, the better the EUT’s MIMO per-
formance. The steeper the CDF curve, the more uniform the antenna performance.
●
The "Avg. Throughput" and "CCDF" graphs are required for dual-antenna tests and
decribed in the relevant chapter; see
​
figure 3-3 and
​
figure 3-4 .
●
The "MIMO Report" contains the result tables, the CDF graph, the average through-
put and CCDF graphs, and all 3D graphs. A separate report file is generated for each
RF channel.
Notice that some of the SISO OTA test results (e.g. the Total Isotropic Sensitivity, TIS)
are not relevant for the MIMO test cases and therefore not calculated.
Result Evaluation and Reporting