The radios in use (Motorola XTS, XTL, and APX series) support both 700 and 800 MHz frequencies. Radios can roam from an 800 MHz site to a 700 MHz site with no problem; the system can mix 700 and 800 MHz frequencies within the same site if needed. The antennas supplied with these mobiles and portables have acceptable SWR over both 700 and 800.
The choice of 700 vs 800 usually comes down to using whatever you can get a license for. Sites like Lake and Geauga that are replacing older Smartzone systems are reusing the 800 MHz freqs already licensed, new sites like Cuyahoga use 700 MHz since it's has open frequencies for licensing and it's not impacted by the rebanding freeze.
The choice of 700 vs 800 usually comes down to using whatever you can get a license for. Sites like Lake and Geauga that are replacing older Smartzone systems are reusing the 800 MHz freqs already licensed, new sites like Cuyahoga use 700 MHz since it's has open frequencies for licensing and it's not impacted by the rebanding freeze.
So, is there any word on whether Lake/Geauga will ever move to the 700MHz band or will they stay 800MHz for the next "1x" years? Are the current radios capable of the switch? This confuses me because if this behaves like the old MARCS system, it is my understanding that when a radio no longer has support from the tower it is usually on it will jump to the next control channel it picks up and lock onto that system. if the Cuyahoga county system on on 76x.xxxxx and the Lake/Geauga systems are on 86x.xxxx...
It seems to me that physics won't allow this to be an efficient hand-off (antenna SWR mainly)...
UNLESS, the radios are equipped with diplexers AND are capable of such a wide tx window.
Am I overanalyzing the situation?