This forum is dedicated to discussions pertaining specifically to the Motorola ASTRO line of radios (those that use VSELP/IMBE/AMBE), including using digital modulation, digital programming, FlashPort upgrades, etc. If you have general questions please use the General or Programming forums.
The UHF Astro Saber bandsplits are 403-470 and 450-520 MHz. They're continuous splits, no sub-bands. So no hacking is required but if you want to exceed the software limits, that info is on batlabs.
The Astro Spectra (Gov't band 403-420 Mhz) will not go any higher than that, they are sub banded where the Astro Saber will go from 403 to 470 Mhz. I've tried on my agencies Astro Spectra.
Unfortunatly the Astro Spectra's don't like too go out of band. I use a 500 mhz Astro Spectra and tried to get it to recieve on 460mhz and I could get the software to accept the frequency but the radio would not recieve it. No luck with the VHF Astro Spectras either.
Howard