**** There is no reference signal from the AIM. Ca

[5h2da]

Need some help from the masses. I recently changed computers and wanted to get the AIM 4170C up and running for some antenna measurements. All was fine until I began the Standard Calibration step with the short circuit test load. I received a message indicating basically an open load. I change to a 50 ohm load and received the same. The load is connected directly to the AIM 4170c SO239.

Clicking CANCEL provided the following error message:


***DATA FROM CONTROLLER***

4170c version 5.7 date=dec 27 2008 10:28:17 cpuclk=6144 10khz fmax 170
Ddsclk=0 maxbaud115k sync sweep df2khz err=000 @
ID Num=75435352


**** There is no reference signal from the AIM. Cal aborted. ***


Computer runs Windows & (XP on previous computer)
Worked perfectly when last used.
Haven’t exposed the unit to RF or anything else that should damage box.

Ideas?

Dennis

[Harold]

It may be a driver conflict if you are using a USB to serial convertor, and most likely you are.
You may need to get a tested compatible convertor from the good guys here at AIM.
Harold K5GVR