I found a couple of birdies on my 396XT and thought the IF Exchange could be used to shift the birdie off frequency. However, when I turn IFX on from the keyboard, the birdie is unchanged. Does IFX really do anything or am I missing a step? Thanks!
I have no signal at 31.05 on my XT. ???Well for the 3 birdies I've found on my 396XT, it has no noticable affect. The strongest one is 31.05Mhz which is full signal without an antenna connected. Trust me, I know the difference between an external signal and a birdie, and this is a birdie being generated inside the radio. Turning IFX on does not reduce the signal what so ever.
I didn't search. I just put the frequencies in manually. I suspect that IFX doesn't do anything for you because these aren't birdies.Three birdies out of 1275Mhz is excellent! My question is why doesn't IFX work to shift the IF and lessen the internally generated signal? I thought that's what it was for, no?
If others are not hearing a birdie at 31.05, then where do you hear them? They are easy enough to find, just remove the antenna and set the frequency to 25Mhz and start searching up. Both forget to turn off the broadcast screens.
In my opinion a birdie would exist on the same frequency in every scanner of the same model. Maybe you can explain to me how two identical radios would be different in this aspect.Well what is your definition of a birdie? Mine is an internally generated signal inside the receiver. My criteria is that the signal is the same strength with the antenna on or off. I also move the radio to different locations to verify the signal strength does not change.
Please tell me your criteria, I'd love to learn somethiing new.
I apologize Steve. You are correct. I did some more testing and you are correct about the 31.05 and 72.45 frequencies. The reason I didn't find this on the first tests is because the only way I see it is with the antenna disconnected. If I hold on the frequencies, the noise goes away as I screw the antenna on and it returns as I am removing the antenna. I tried several antennas and I can attach the sma-bnc converter but any anything beyond that and the birdie goes away.I'm answering the same questions on two posts.
If it is an external signal as you propose, then why is it the exact same signal strength (1 bar) with or without the antenna (Uniden stock antenna)? I can go anywhere inside my house or outside without the antenna and the signal does not change even slightly.
That's how I know.
UPMan, since it has now been confirmed that 31.05 is a birdie on at least 2 XTs, would you be able to investigate why IFX does not work? I have only found 3 birdies on my XT and IFX has no detectable affect on any of them. So if the reason IFX was added to the XT was to eliminate birdies, I'd say it fails (at least in my case).The birdie might be wide enough that IFX doesn't shift far enough to eliminate it.