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Reflection Only: Corrects for the three error terms associated with an
S11 measurement (EDF, ESF, and ERF), an S22 measurement (EDR,
ESR, and ERR), or both.
1 Path, 2 Port: Corrects for the four forward-direction error terms
(EDF, ESF, ERF, and ETF), or the four reverse-direction error terms
(EDR, ESR, ERR, and ETR).
Full 12-Term: Corrects for all twelve error terms associated with a
two-port measurement. A 12-Term error model is shown in Figure 7-6.
Measurement calibration using the 37xxxE is straightforward and
menu directed. A short time spent in preparation and preplanning will
make the process simple and routine. (Example: Adjusting the coaxial
cables used in the measurement setup such that insertion of the DUT
causes minimal flexing of these cables).
The screen prompts on the 37xxxE guide you through the calibration
process—a process that consists of connecting and disconnecting
connectors and moving the slide on a sliding load (if one is used).
The most critical part of the calibration process is properly seating and
torquing the connectors. Also, you will notice that the calibration takes
longer when the ports are terminated with a load. This is intentional.
It allows for more averaging during the isolation measurement.
37xxxE OM 7-7
MEASUREMENT CALIBRATION DISCUSSION
REFLECTION MEASUREMENT ERRORS
·
Source Match
·
Directivity
·
Tracking
CALIBRATION TYPES
·
Frequency Response
·
Reflection Only—1 Port
·
1 Path, 2 Port
·
12 Term—2 Port, Both Directions