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?

Thanks,
Joel



On Tue, Mar 5, 2013 at 10:07 PM, Alexander Chemeris <alexander.chemeris@gmail.com> wrote:
On Fri, Feb 22, 2013 at 6:28 PM, joel yabut <joel@jointventure.com> wrote:
> May i know the following specs
> 1. What is the tx and rx isolation of umtrx?
> 2. What is the power output in dbm of your umtrx?

Andrey Sviyazov will comment on this.

> 3. How is the lna on the rx input and is an external lna and bpf
> recommended?

For Fairwaves 10W base stations we're developing UmSEL, which has
channel filter and an additional LNA. For the use without amplifier
you don't need any additional filters or LNAs.

> 4. What is the main advantage of umtrx compared to usrp by ettus?

If you want to use it for GSM, then it's cheaper and gives you
dual-channel support.

--
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru




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