The following maps which show the signal strength receive levels from DRC repeaters. These maps have been prepared by W6OAV, using the freeware software Radio Mobile, by VE2DBE. The assumptions used for the calculations and plotting are:
- The mobile unit is 25 watt FM, using a standard 1/4 wave vertical on the roof of the vehicle.
- The mobile unit receiver sensitivity requires 0.5 microvolt input to achieve a 10 dB (S+N)/N ratio – typical of ham gear.
- The green areas are set to show an additional 10 dB signal, meaning the received signal has a 20 dB (S+N)/N ratio.
- The statistical reliability of coverage is set to 90% certainty.
Your coverage may vary slightly, depending on your mobile radio, antenna gain/installation, and vehicle.
