I have an older AA-230 Zoom and a 6ish month old Stick? Pro.?
I went to make up a 1/4 wave stub to notch out some interference and by accident? discovered that the two units disagree. The Stick? Pro says 97.991MHZ and the AA-230 says 96.409MHz. I set them both to check the length of the stub and the result was identical on both.
Another weird thing is that the AA-230 when set to TDR and a sweep is started, it says you can cancel the sweep by hitting the X (cancel) button. If I do this, the AA-230 locks up and I have to remove a battery so it resets and then re-install the battery and all other functions work fine.
The AA-230 passes ALL the self diagnostics and has been updated to the latest firmware.
This leaves me with the question, which one is reporting an incorrect stub length frequency and is there a problem with the AA-230 TDR mode locking up the unit when cancelled. If the TDR scan is allowed to complete, the unit behaves normally (The TDR scan with the AA-230? in much slower than the Stick Pro, but I'm assuming it's simply a faster processor in the Stick Pro).?
Does anyone have any advice?
Regards
Chris VE4FU
kaptain_zero VE4FU