CHIRP

Attached radio file and screen shot of problem... If you open black chirp file it allows you to have duplex set to (+,-, off, none, or split) and split is missing with the b5.

Thanks

Here is the radio file

I'm sorry, I didn't check the manual carefully enough to notice that the radio itself does not support split operations.
Anyway you can program a different shift offset for each memory; shift is limited to 69.995 MHz which should allow the use of all "single band" repeater.

73 de IZ3GME Marco

Just to clarify, this driver does support split.

What you're experiencing is a quirk in the UI related to a disconnect with how CHIRP represents things and how the radio does. Let me explain:

CHIRP was designed for amateur radios, which represent duplex channels as the RX frequency +/- an offset for the TX frequency. LMR radios do it just as a separate TX and RX frequency (i.e. split mode). Internally to the radio, the UVB5 (and others) store only the TX and RX frequency. This presents a conflict for CHIRP because it has no way of knowing, when looking at the radio, whether the user asked for a split or regular +/- channel. Thus, it takes the following tact:

1. If the split is less than some amount, assume it's a +/- channel
2. If it's greater, assume it's a split channel.

So, I think what you're seeing is: you're putting in a split with a very small delta (600kHz) between TX and RX, and so CHIRP shows that as a +/- channel. The frequencies are the same as you'd expect, it's just a quirk in how it's displayed.

If you program the radio with what you have, you should see the proper TX and RX frequencies accordingly.

Make sense?