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4-2 1-Port Cable Measurement
VNA Measurements
Measurement Readout and Interpretation
The screen-captured measurement that is shown in
Figure 4-1
uses a four-trace display to
show S
, a smoothed version of S
/2, a distance-to-fault (DTF) measurement using return
11
11
loss, and another distance-to-fault measurement using SWR. Note that these four
measurements are displayed in Quad format as Trace 1 (upper left quadrant), Trace 2 (upper
right quadrant), Trace 3 (lower left quadrant), and Trace 4 (lower right quadrant). For an
explanation of trace format versus the number of traces that are displayed, refer to section
"Trace Format Menu" on page
6-52. The screen-captured measurements that are shown in
this measurement guide are examples and may not match any display on your instrument.
Figure 4-1.
Four-Trace S
Display
11
SWR as a good tool for identifying major discontinuities, and Return Loss is better for
identifying minor discontinuities.
4-2
PN: 10580-00289 Rev. K
Vector Network Analyzer MG
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