2-port vector network analyzer ARINST VNA-PR1
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9.5. Information about the device
9.5.1. Enter the
Device
section of the main menu (Figure 9.10).
Figure 9.10 - Information about the device
Information about the device will be displayed on the screen:
device ID;
information about the developer;
device firmware version.
9.5.2. In addition to information about the device, this section of the menu contains options:
electrical cable length compensation
Electrical delay;
shift of the amplitude scale
S21 Amp. Offset
;
adjusting the output signal power
Power output
;
displaying the VSWR limit line
SWR limit line.
For a detailed description of these options, see units 9.6, 9.7, 9.8, and 9.9.
Back
button-exit to the main menu.
9.6. Compensation electrical length of the cable
9.6.1. Enter the
Device
section of the main menu (Figure 9.10).
Option
Electrical delay
designed to compensate for phase overrun and transfer of the calibration
plane when connecting additional cables with low attenuation to the device.
Let's look at the example of the Smith chart, how the
Electrical delay
option of compensation for the
electrical length of the cable works.
During the measurement process, when an additional adapter cable is used with a small total signal
attenuation (no more than 1 dB), the calibration plane shifts. To compensate for phase overrun when ad-
ditional cables are connected to the device, the measurement plane must be moved to the calibration
plane.
9.6.2. Calibrate the device in accordance with unit 9.4. If the factory calibration parameters are correct
for the measurement conditions, calibration is not necessary.
The graph on the Smith chart, if the calibration is successful, will be tightened into a circle with a mini-
mum radius (Figure 9.11).
Summary of Contents for ARINST VNA-PR1
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