MegiQ VNA04 Series, Руководство пользователя

Страница: 39 / 64

VNA0440 – VNA0440e
VNA0460 – VNA0460e
user manual V3.1
www.megiq.com
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The Cal Kit panel shows the properties of the selected Cal Kit in the list. The name and
label can be changed. The label is used for a short notation of the kit in an element
definition.
The Cal Kit Elements panel shows the calibration elements in the selected Cal Kit. You
can again add new elements, export and import them from a Cal Element file (.vce).
The bottom panel shows the properties of the selected Cal Element. On the left are general
properties and on the right are the coefficients or S-parameters that define the
measurement compensation for the element.
The Label is used for short notation of the calibration element. The frequency range is
used to determine if an element is suited for the current measurement range. A zero value
for the max frequency causes the software to ignore the max frequency.
The type selection identifies the type of calibration and the connector and gender boxes
allow for the selection of connector and gender of the element. The serial number allows
identifying a specific Cal Element from a specific Kit.
There are actually three Genders: Female , Male and Neutral . Neutral can be used for
sexless connectors or for test fixtures and PCB Cal Kits that don’t calibrate at a connector.
Neutral is
not compatible with Female or Male.
The Gender is that of the Cal Kit Element itself while the gender of the port setup is that
of the measurement port. The software will match a Male Element with a Female Port
and Neutral with Neutral .
Cal Element definitions
The electrical properties of the calibration elements can be defined with Coefficients or
by measured S-parameters .
In the Coefficient mode all element have a Delay and Loss property. Some elements have
a small length of transmission line (or adapter). The Delay is the distance (travel time)
from the reference plane to the actual calibration impedance. The Loss is the skin effect
loss of that transmission line.
The other coefficient definitions depend of the type of the Cal Element.
Open Element