Monitoring issues GRE 500

I have a GRE 500 and a Pro 197 scanner, In my area, they are broadcasting P25, ii reproadcast on on 800mhz . The Pro 197 receives broadcasts fine, but the GRE 500 is garbled, using the same software to program both. GRE is fine one minute and garbled the next, the Pro 197 never does this, any suggestions.

If it is a software issue, what then, GRE is out of business.



Thanks..