Concepts and features
R&S
®
ZNA
329User Manual 1178.6462.02 ─ 29
For every supported switch matrix, the available routes are prioritized according to the
number of switches they traverse (the rectangles in Figure 4-49).
●
To obtain highest measurement precision, the driving port uses the "best possible"
(highest priority) route. On the other hand this can causes additional matrix switch-
ing procedures and hence can result in a reduced measurement speed.
●
If the focus is on measurement speed, the number of matrix switching procedures
is minimized, disregarding a possible loss in measurement precision.
The R&S ZNA allows you to select which optimization should be performed.
4.7.41.5 Multiple paths and calibration
With switch matrices, a signal loss of up to 25 dB is possible, so (full) calibration is a
must! For a high number of test ports, manual calibration is time-consuming and error-
prone, so automatic calibration (with auto-detection) is recommended.
During calibration, correction data are determined for all possible paths from the VNA
to the related test ports. For the currently supported matrices a maximum of 2 paths
per test port are available, resulting in a maximum of
●
2 paths per reflection measurement
VNA
Route 1 Route 2
●
2 paths per transmission measurement for a 2-port VNA:
Optional extensions and accessories
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