18 Mar
2013
18 Mar
'13
2:49 p.m.
Joel,
On Wed, Mar 13, 2013 at 9:09 PM, joel yabut <joel(a)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_specif…
--
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru