User Manual
RPC-2.92
Calibration Kit
LRL-Version
02CK020-150
Rosenberger Hochfrequenztechnik GmbH & Co. KG
P.O.Box 1260 D-84526 Tittmoning Germany
www.rosenberger.com
Tel. : +49 8684 18-0
Email : [email protected]
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3. Standard Definitions
3.1 Standard Definitions
Standard definitions provide the data needed to mathematically describe the electrical
characteristics of each calibration standard.
Model based
standard definitions are the traditional format and can be used on both old and
modern VNAs. The values of these constants are theoretically derived from the physical
dimensions and material of each calibration standard, or from actual measurements. All necessary
values are delivered with this calibration kit.
All standard definitions are delivered on Standard Definition Cards in the calibration kit and in
printed form in the calibration certificate.
The Short devices are stated in two functions:
•
Reflect
calibration standards: LRL, TRL and TRM calibrations need the same reflection
value for both ports. Therefore a gender independent model is used with a short inductance
(L0 to L3) of 0 H.
•
Short
calibration standards: OSL (OSM) and OSLT (TOSM) calibrations which can only be
carried out with additional calibration standards need well modelled calibration standards.
Therefore the short inductances (L0 to L3) for both genders are optimized individually from
the measured phase values to get the best model.
The Air Line devices are stated in two functions:
•
Line
calibration standards: with LRL and TRL calibrations Lines can only be used in a
limited frequency range.
•
Air Lines
: they can be used in their full frequency range as well matched, low loss
transmission lines as well as for verification purposes. Even below the specified lower
frequency limit they can be used with degraded performance.
Standard definitions as VNA files for a LRL calibration (Line and Reflect) in the frequency range
from 1 GHz to 40 GHz are included on an USB stick.
These standard definitions are used in the calibration of the VNA to determine the systematic
errors of the measurement system. Please always use the most recent source of information
(Standard Definitions Cards or VNA specific files).
NOTE: The calibration certificate states dimensional measurements (lengths and diameter)
for the Air Lines. Please do not mix up the dimensional length of the outer
conductor with the electrical length that is needed as standard definition for the
VNA.
