User Manual
F
75
Ω
Calibration Kit
Industrial Version
74CK011-170
Rosenberger Hochfrequenztechnik GmbH & Co. KG
P.O.Box 1260 D-84526 Tittmoning Germany
www.rosenberger.com
Tel. : +49 8684 18-0
Email : info@rosenberger.com
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TRM
(7-term)
Thru-Reflect-Match
The male and female Short standards of this kit are designed with the same offset length.
So the TRM calibration technique can be used. It requires high reflects with a symmetrical
reflection during VNA calibration on both test ports. TRM needs less connections during
calibration than OSLT and UOSM.
UOSL (SOLR)
(7-term)
Unknown-Open-Short-Load (Short-Open-Load- Reciprocal)
The UOSM technique is similar to the OSLT calibration but doesn’t need well-known
adapters. Even a low loss Device under Test (DUT) can be sufficient as Thru standard. The
UOSM technique is particularly well suited for calibration involving different connector types
at the test ports and is most effective when data based standards are available.
In cases when the two VNA test ports have different connector systems installed, e.g. RPC-N
75
Ω
and F 75
Ω
UOSM can handle this situation. A second calibration kit is needed.
Calibration Procedure
Adapt your VNA with Test Port Cables, Matching Pads and Adapters to a male / female
F 75
Ω
configuration and do the VNA Calibration.
The procedures to perform a VNA calibration are very different between the VNA models. Modern
VNA often guide you thru the settings and actions. For details please consult the manual of your
specific VNA.
4.2 Calibration Check
It is advisable to check the calibration after error correction has been performed, particularly when
test port cables and adapters have been used.
During the calibration
•
Calibration standards can easily be mixed up
•
Connections may not be tightened correctly
There might be defects
•
VNA, e.g. mechanically overloaded test port
•
Instable test port cables
•
Mechanically overloaded load
•
Bent or broken contact fingers
There is no Verification Kit available for F 75
Ω
connectors. So additional loads and adpaters can
be used to verify the quality of reflection and transmission measurements or short cable assem-
blies of high quality may be used to check for plausible measurement results. This should be done
from time to time to identify defects.
