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Alexander Chemeris alexander.chemeris at gmail.comJoel, On Wed, Mar 13, 2013 at 9:09 PM, joel yabut <joel at jointventure.com> wrote: > I have a question about the ideal RSSI Noise. I am testing the UMTRX and > have the following obeservation: > > when I type noise with the default setup of RX GAin 47. the RSSI noise is > -26dB and when i change the noise to RX Gain 0. the RSSI noise goes down to > -46dB. > > Which is the better option? as I understand the lower the noise floor the > better. Now if I install my Duplexer, LNA and BPF my noise goise up to > -16dB. Is this okay or should I trim the RX gain? What is the ideal RSSI > NOISE? I can't give you an easy answer here. We're using a complicated procedure of tuning Rx gain to specific hardware configuration of our base stations. If you don't have measurement equipment, you could follow this manual to get to working results: https://code.google.com/p/umtrx/wiki/RunningOpenBTS#Tune_OpenBTS_for_specific_hardware -- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru