Of course, aside from the software alignment point issue, there are hardware considerations, such as the tunable range of the varactor-tuned front end, PLL lock range with respect to VCO control voltage, PA performance, etc. Although I've heard rumors of someone believing there to be a way of changing the frequencies of the Tuner alignment points, I've never found anyone who's actually done it. Front end tuning will be out-of-range, so sensitivity and rejection will suffer. will all be wrong, which will result in poor (or no) decode at the subscriber radio. So when you program channel frequencies outside the radio outside of that range, the radio doesn't have tuning data to use out-of-band. It's easy to program them below 450 MHz, but the big issue is that all of the Tuner alignment points for deviation, modulation balance, front end tuning, transmitter power, etc. model to operate at the 430 - 440 MHz range. So my question is whether it is possible to get the 450 - 512 MHz. There are few XPR8300 repeatersĪvailable locally in the 403-470 MHz models. In Australia our UHF repeater band is 430 - 440 MHz.
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