That's a pretty broad question. Need more info - are trying to pass a band of frequencies and reject all others, reject a specific band, high pass, low pass, insertion loss?
I see many users that have Invert as their prefered filter for VHF Air, as that will block broadcast FM a bit more. For UHF air it's probably different setting depending of your local interferencies.
The best filter for the SDS is the Uniden BC125AT.
Remember that the SDS series was produced to limit simulcast on 700-800 MHz systems. Not be a stand alone VHF/UHF air receiver.
Just saying......
The best filter for the SDS is the Uniden BC125AT.
Remember that the SDS series was produced to limit simulcast on 700-800 MHz systems. Not be a stand alone VHF/UHF air receiver.
Just saying......
Painfully understood, just trying to squeeze every bit of performance performance out of this scanner when it comes to something other than 700/800 MHz.