OK. Thank you.

> 2. What is the power output in dbm of your umtrx?

After fixing this issue I measured + 20 dBm for 900 MHz band and +17 dBm for 1800.

I will be testing this UMTRX with a DCS amp with 10 dBM input. Just to be sure, I just need to adjust attenuation to at least 7 dBM and 8 probably to avoid clipping the RF amp as below:

GSM.Radio.PowerManager.MaxAttenDB 8
GSM.Radio.PowerManager.MinAttenDB 0

Is using an LNA with BPF advisable with your UMTRX?

What is the operating temperature of your UMTRX as I want to make sure the HD case I am using for testing is good enough. I installed a small fan and so far temperature is around 40 deg C.

The LEDs are on the board and I may want to solder some LEDs to monitor status, where on the board can I terminate the power for LEDs?

On Tue, Mar 5, 2013 at 10:16 AM, Andrey Sviyazov <andreysviyaz@gmail.com> wrote:

Hi Joel.

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?
Not yet measured and unfortunately there are no info from Lime Micro.

> 2. What is the power output in dbm of your umtrx?
After fixing this issue I measured + 20 dBm for 900 MHz band and +17 dBm for 1800.

> 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

Best regards,
Andrey Sviyazov.

--
Mother Ignacia Avenue corner Scout Rallos St.
Quezon City, Metro Manila, Philippines