On 25 October 2012 19:47, Sylvain Munaut 246tnt@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