Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

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Glossary R&S
®
ZVA/ZVB/ZVT
1145.1084.12 2 E-1
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.
H
Harmonic: Integer multiple of the fundamental frequency. The fundamental is the first harmonic, the
nth harmonic is n times the frequency of the fundamental.
Harmonic distortion: The production of harmonic frequencies (harmonics) by an electronic system
when a signal is applied at the input.
Harmonic grid: A set of equidistant frequency points fi (i = 1...n) with spacing Delta(f) and the
additional condition that f1 = Delta(f). A harmonic grid is required for low pass time domain
transforms.
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. An acoustic warning can be generated in addition if a limit is exceeded.
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).