mardi 3 juin 2014

Methods for finding the quietest frequency during coordination

Say your licensing a customer for a repeater pair. The local frequency coordination company gives you several UHF 450/460 repeater pairs to choose one from. It is your job to find the "quietest" frequency.



How would YOU go about doing this? What equipment would you use? (assume the repeater antenna is installed and you'd be listening on that)



I'm thinking I'd use an audio logging recorder recording separate channels of audio from individually programmed commercial radios each listening on one of the possible frequencies. Put it up at the future repeater location and let it sit for a week. Check it after a week and see which frequencies were the quietest.



How has this been done in the commercial LMR world in the past? Is there any equipment out there that has been designed for this purpose? Has any of this equipment recorded PL/DPL history at the same time?




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