Glossary
R&S
®
ZVA
98
Quick Start Guide 1145.1090.62 ─ 10
Harmonic distortion:
The production of harmonic frequencies (harmonics) by an elec-
tronic 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
Intercept point:
Fictitious lower-tone DUT input/output level where the intermodulation
suppression (-->) for a given intermodulation product reaches 0 dB
Intermodulation measurement:
Measurement where the DUT is supplied with two RF
signals of equal power but different frequencies termed the upper and lower tone. The
analyzer measures the frequency-converting behavior of the DUT (--> intermodulation
product).
Intermodulation product:
Special type of emissions of a nonlinear DUT that is supplied
with a two-tone RF signal (--> intermodulation measurement). The intermodulation prod-
ucts occur at frequencies which correspond to sums and differences of the upper and
lower tone frequencies and their integer multiples.
Intermodulation suppression:
The ratio of the power of an --> intermoulation product
to the power of the lower tone fundamental wave.
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 excee-
ded.
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).
M
Marker:
Tool for selecting points on the trace and for numerical readout of measured
data. A marker is displayed with a symbol (a triangle, a crossbar or a line) on the trace;
its coordinates are shown in the marker info field.
