Rohde & Schwarz 1145.1010.04/05/06, Operating Manual

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Glossary R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4 E-1
Source match error: Measurement error caused by a mismatch of the analyzer's source port causing
part of the signal reflected off the DUT to be reflected again off the source port so that it is not
measured there. The source match error can be corrected by means of a full one-port
calibration or a two-port calibration (except normalization).
Source power calibration: Correction method that ensures accurate power levels of the generated
wave at an arbitrary reference plane in the measurement path. The source power calibration
eliminates frequency response errors in the signal path between the source and the reference
plane.
Stimulus value: Value of the sweep variable (frequency/power/time/point number) where a
measurement is taken. Also termed sweep point.
Sweep: Series of consecutive measurements taken at a specified sequence of stimulus values = series
of consecutive measurement points.
Sweep point: Value of the sweep variable (stimulus value: frequency/power/time) where a
measurement is taken.
Sweep range: Continuous range of the sweep variable (frequency/power/time) containing the sweep
points where the analyzer takes measurements. In a Segmented Frequency sweep the sweep
range can be composed of several parameter ranges or single points.
Sweep segment: Continuous frequency range or single frequency point where the analyzer measures
at specified instrument settings (generator power, IF bandwidth etc.). In the Segmented
Frequency sweep type the entire sweep range can be composed of several sweep segments.
T
TNA: A calibration type using a through, a symmetric network and an attenuation standard. The
properties of the network and the attenuation don't have to be known exactly. Like TRL and
TRM, TNA is especially useful for DUTs in planar line technology.
TOM: A calibration type using three fully known standards (through, open, match), recommended for 2-
port measurements on coaxial systems.
Topology: Assignment of the physical ports of the NWA to the logical ports used for the measurement
of mixed mode S-parameters (balance-unbalance conversion).
TOSM: A calibration type using four known standards (through, open, short, match), also called SOLT
or 12-term error correction model. TOSM calibration is available for 2, 3 and 4-port
measurements.
Trace: A trace is a set of data points that can be displayed together on the screen. The trace settings
specify the mathematical operations used to obtain traces from the collected data. They
complement the definitions of the Channel menu. Each trace is assigned to a channel. The
channel settings apply to all traces assigned to the channel.
Trace point: Point on the screen which is an element of the displayed trace. The trace points for ratios
and wave quantities can be derived from the entire set of measurement points using different
detector settings.
Transmission tracking error: Frequency-dependent variation of the ratio of the transmitted wave to
the reference wave at a test port when an ideal transmission coefficient (= 1) is measured. The
transmission tracking error can be corrected by means of a transmission normalization or one
of the more sophisticated calibration methods.
TRL: A calibration type using a through and a line standard plus a possibly unknown reflect standard.
The calibration range is limited. Like TNA and TRM, TRL is especially useful for DUTs in planar
line technology.
TRM: A calibration type using a through and a match standard plus a possibly unknown reflect
standard. Like TRL and TNA, TRM is especially useful for DUTs in planar line technology.