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Andrew Back andrew at carrierdetect.comOn 25 October 2012 19:47, Sylvain Munaut <246tnt at gmail.com> wrote: >> Does this sound sensible and if so what size of attenuators might I >> want assuming MS and BTS were each set at 6dBm? I've seen figures for >> receiver sensitivity, but wasn't sure as to a "good" RF level to use >> with direct cabling! >> >> I also have 10/20 dB directional couplers and circulators if they >> might find use in a better configuration. > > Yes it sounds perfectly good. Make sure you connect attenuators as > close to the BTS and MS as possible to avoid as much leak as possible. That is good to hear. > You should target something like - 60 dBm at the RX. So something like > 90 dB attenuation or so. Wouldn't 90 dB attenuation for -60 dBm at RX suggest a TX power of 30 dBm = 1 watt? Seems high and was thinking of closer 6 dBm at TX. But if I know to aim for -60 dBm at receive ... > Make sure to use semi rigid cable because at > that level of attenuation the cable leaks are non negligible :) Good advice, thanks! Cheers, Andrew -- Andrew Back http://carrierdetect.com