VNA0440
–
VNA0440e
VNA0460
–
VNA0460e
user manual V3.1
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The list shows the
calibrations
that are required for the current port setup. When the
calibration has been performed it will be marked with the green checkbox. When an item
is highlighted in the list the VNA device will show what kind of termination is required
on what port by blinking its LED colours.
The list also shows the
Cal Kit Elements
that are used for the calibration. The format is
for example ‘stp:F-O’. This means that element Female-Open is used from the SMA
Template kit.
The
Calibrate
button will perform the calibration for a highlighted item in the list. After
that the list will step to the next item. Note that calibrations can be done in any order; they
do not need to follow the order of the list.
With the
Dual Calkit
box the calibration procedure can be simplified for multi-port
calibration if a dual calibration kit is available. This box can be toggled without losing
calibrations that are already performed.
When the
User Calibration
box is off, the VNA will use its port calibration and the
measurements will be normalized to the port calibration of the VNA.
When the
User Calibration
box is checked the user calibration will be used and the
Sweep
and
Run
buttons will only be enabled when all calibration items are complete.
This box has no effect on performing the actual calibrations.
After a measurement is done and normalized by the software, it is possible to re-do the
calibration. With the
Renormalize
button this new calibration can be applied to the
current measurement. This button will first (re) apply the current Calibration Kit to the
calibrations and then use this calibration for the measurement normalization.
The
Clear Data
button clears the measurement data but not the calibration data. The
Clear All
button clears both measurement and calibration.
Instrument calibration
The VNA will perform internal hardware calibration to keep the measurements accurate.
This is necessary when the temperature changes or when the measurement setup has
changed. When starting a sweep, the software will perform this internal calibration when
necessary.
When using the continuous sweep mode the software will do an automatic calibration
check at the start of this mode and during sweeping. The continuous mode may get
interrupted by a calibration sweep every now and then, especially during warm up of the
hardware.
The
Cal VNA
button can be used to force an internal calibration. This is usually not
necessary because it is handled automatically.
