OK. Thank you.
- What is the power output in dbm of your umtrx?
After fixing this issuehttps://code.google.com/p/umtrx/issues/detail?id=41&can=1&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20ModifiedI 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.comwrote:
Hi Joel.
On Fri, Feb 22, 2013 at 6:28 PM, joel yabut joel@jointventure.com wrote:
May i know the following specs
- What is the tx and rx isolation of umtrx?
Not yet measured and unfortunately there are no info from Lime Micro.
- What is the power output in dbm of your umtrx?
After fixing this issuehttps://code.google.com/p/umtrx/issues/detail?id=41&can=1&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20ModifiedI measured + 20 dBm for 900 MHz band and +17 dBm for 1800.
- 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.
- 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.