hello im trying to enter salem county trunk system, heres what i have for system-vhf/uhf frequencies-501.4125 501.5625 501.7625. atten-off narrow fm-no audio boost-off dwell-0 dig agc-on supertrak-on multisite-off ttables-custom-table1lochannel-380 hichannel-759 offset-380 base-493.0125 step-25.0 fleetmap-typeII . is this right or do i need changes. im using a telescoping radioshack attena on my gre-500 , is newcastle to far away to hear salem county i only have 1 bar strength. thanks for any help as to if the system is set up right to distance to monitor salem county.