MegiQ VNA04 Series, Руководство пользователя

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VNA0440 – VNA0440e
VNA0460 – VNA0460e
user manual V3.1
www.megiq.com
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Session files have the extension .vns .
To create a new, empty session, press the “Start a new Session” icon
Opening a session
You recall previous saved Session files by clicking the Open a session file -icon. This
opens a file dialogue box where you can navigate and select the right Session file.
You can also double-click a session file from the Windows file explorer to open the VNA
program and load the session file. Note that this action will not load a measurement from
the session file.
Recalling measurements
Select a previously saved measurement, by selecting it from the Session list.
Note this not only recalls the measurement data but also graphs, calibration data and other
settings.
So beware, this overwrites calibration data stored in the VNA before the recall. The
instrument cannot know whether this calibration is valid or not, i.e. whether you changed
the set-up since you saved the measurement.
Saving measurements thus also stores the calibration data and you can make good use of
that, since a 2-port calibration can take some time. If you work with very well defined set-
ups (cables, fixtures, connectors etc.) you can save a measurement after calibrating and
use this merely for recalling the calibration data-set. Still you will have to recalibrate every
now and then to be on the safe side.
Deleting and renaming
If you right-click on the name of a measurement in the session list, you can rename it, or
delete it.
Export and Import
The data of a measurement in the session file can be exported by right clicking the item
and select
Export as SnP from the context menu. This opens the same export screen as
the Export button in the measurement control bar.
A touchstone file can also be imported as a measurement by using the Import from SnP
item in the context menu. This allows the measurement data to be displayed in graphs or
manipulated by the program. You can even use the match calculator to calculate a match
circuit for the imported data. After loading an imported measurement you have to add the
graphs to the screen manually. You can then save the measurement with the display setup.
Export Touchstone
The Export Touchstone screen is used to select measurement items to export and where
to export them to.