Calibration - Array Solutions AIM4170 Manual

Antenna Analyzer AIM4170 page 7

Calibration

The AIM4170 has no internal adjustments. There are no trim pots or caps inside. All
the calibration is done with the following software procedure.
Click on the Setup menu and select Calibrate Analyzer.
A message box will appear near the center of the screen, as shown below:
Attach the BNC connector with an internal short circuit (this is included with the
AIM4170, it is labeled "short").
If this shorting connector is not handy, then a piece of wire, like a resistor lead, can be
used with good results too.
After the short circuit is in place, click Continue.
The program will run for a few seconds to take several reading of the short circuit.
Sometimes when calibrating with a coax stub or an external filter connected to the AIM
RF port, the impedance may appear to be significantly difference from a short circuit at
1MHz and a message will appear asking if this is a valid condition. If the connections are
correct and you really do want to continue with the special external hardware hooked up,
click YES. Otherwise, click NO to abort the cal procedure. Then after connecting the
desired load, restart the calibration.