Specifications

larger absolute difference, are used for the interval [f1, f2]. Data from
the two lines, which make up the smaller absolute difference, are used
for the interval [f2, f3].
LRL/LRM Calibration (Waveguide)
The waveguide procedure is the same as the Microstrip procedure,
except chose WAVEGUIDE as the line type and use the
WAVEGUIDE CUTOFF FREQ soft key (Appendix D, page D-32) to
select or change its value.
7-9 TRM CALIBRATION
PROCEDURE
The TRM Calibration procedure is the same as the LRL/LRM
procedure, except that certain parameters have been set by default so
that the calibration is simpler to perform (e.g., the L parameter in the
LRM calibration has been set to equal a length of 0 mm for a through,
and the R parameter is set for a short)
7-10 BALANCED
CALIBRATION
TECHNIQUE
Balanced calibration and measurement techniques are covered in the
companion MS462XX Measurement Guide, Anritsu Part
Number: 10410-00213.
7-11 FLEXIBLE
CALIBRATION
Flexible Calibration mode allows an existing 2, 3 or 4-port calibration
to be quickly subdivided so that only the required measurements are
used. This is accomplished by having all error coefficients available,
but just enabling those that are needed. The configuration can be
changed so that calibration setups do not need to be recalled from
memory or disk.
Using Flexible Calibration
Flexible Calibration requires that a single N-port (2, 3 or 4-port)
calibration be performed (see application notes AutoCal, 11410-00258,
or 4-Port AutoCal, 11410-00298, for more information). Then, when a
given measurement is to be performed, the user selects what portion of
the calibration is to be used. The simplest case is when a full M-port
calibration is enabled (M£N).
For example, a 4-port VNA is used to measure a pair of 2-port DUTs.
While one DUT is being measured, the second DUT is being loaded on
the remaining two ports. The user has two options:
q
Use two 2-port calibrations and recall the setup between each
measurement
q
Use a 4-port calibration
LRL/LRM MEASUREMENT
CALIBRATION CALIBRATION
7-34 MS462XX OM