Joel,
What matters is not an absolute noise level, but signal SNR.
On Mon, Mar 18, 2013 at 10:52 PM, Joel Que Yabut Joel@jointventure.com wrote:
Thanks I have done this already. I have a spectrum analyzer as well but I am just want to check if I really need to install the LNA as it seems that noise is going up.
-- Joint Venture SLEC, Inc.
No. 2 Scout Rallos, Quezon City, Metro Manila Philippines Tel. 63 2 3742969 Fax 63 2 3748662
On 3/19/13 2:49 AM, "Alexander Chemeris" alexander.chemeris@gmail.com wrote:
Joel,
On Wed, Mar 13, 2013 at 9:09 PM, joel yabut joel@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_speci fic_hardware
-- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru
-- Regards, Alexander Chemeris. CEO, Fairwaves LLC / ООО УмРадио http://fairwaves.ru