R&S
ZVL
Glossary of Terms
Quick Start Guide 1303.6538.62 - 05
5
paths. Crosstalk causes an isolation error in the measurement which can be
corrected by means of a calibration.
CW frequency:
Continuous Wave frequency; fixed stimulus frequency.
D
Data trace:
Trace filled with measurement data and updated after each sweep
(dynamic trace).
Diagram area:
Rectangular portion of the screen used to display traces. Diagram
areas are arranged in windows; they are independent of trace and channel
settings.
Directivity error:
Measurement error caused by a coupler or bridge in the analyzer's
source port causing part of the generated signal to leak through the forward
path into the receive path instead of being transmitted towards the DUT. The
directivity error can be corrected by means of a full one port calibration or one
of the two-port calibration methods (except normalization).
Discrete marker:
The stimulus value of a discrete marker always coincides with a
sweep point so that the marker does not show interpolated measurement
values.
E
Excursion:
Difference between the response values at a local maximum (minimum) of
the trace and at the two closest local minima (maxima) to the left and to the
right.
F
Forward:
A measurement on a two-port DUT is said to be in forward direction if the
source signal (stimulus) is applied to port 1 of the DUT.
I
Isolation error:
Measurement error caused by a crosstalk between the source and
receive port of the analyzer.
L
Limit check:
Comparison of the measurement results with the limit lines and display of
a pass/fail indication.
Limit line:
A limit line is a set of data to specify the allowed range for some or all
points of a trace. Typically, limit lines are used to check whether a DUT
conforms to the rated specifications (conformance testing).
Load match error:
Measurement error caused by a mismatch of the analyzer's
receive (load) port causing part of the signal transmitted through the DUT to be
reflected off the receive port so that it is not measured there. The load match
error can be corrected by means of a two-port calibration (except
normalization).
