Refer to Antenna

[cuh]

I am a recent user trying to make the function "Refer to Antenna" work but keep getting the same values and curves as with a "standard Scan".

Occasionally it worked twice yesterday, so I am not completely lost!  Is there a hidden setting, secret, or bug somewhere?

AIM4170 / prog version 882 /  PC / Win 7/64

/cuh

[Bob]

Version 882 does have a problem with the Refer to Antenna function.
Version 865A can be used for this function.

This function does have it's limits though. It should only be used for good quality coax. The impedance and velocity factor of coax is not constant over the whole length and this limits the accuracy. Also the impedance may not be equal to the "nominal" impedance in the catalog. The impedance of 50 ohm cable can vary quite a bit. AC6LA.com has some interesting data showing how coax parameters vary with frequency.

Custom cal is much better when it is possible to put the cal loads at the far end of the transmission line. This takes into account variations in impedance, velocity factor, and loss and it can be used when there is coax and ladder line in one transmission line system.

--73/Bob