13 Mar
2013
13 Mar
'13
1:09 p.m.
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(a)gmail.com> wrote:
On Fri, Feb 22, 2013 at 6:28 PM, joel yabut
<joel(a)jointventure.com> wrote:
--
Mother Ignacia Avenue corner Scout Rallos St.
Quezon City, Metro Manila, Philippines
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