[Openbts-discuss] Transmission with openbts.

[Ashish <ash...@ya...>]

Hi,
    I have been to trying to setup an openbts box for lab testing. I am trying it desperately since last couple of week but could not make it to transmit. I tried both 850 (free band in India) and 900 GSM bands and checked the transmission using the nokia dct-3 terminal logging. I thought after starting the OpenBts app, when searched manually  I should see the Openbts network on the phone, but I see none with my box. 

To make it working , It required soldering a capacitor at c204. I did it but am not still able to receive the signals.

Reference : http://www.nabble.com/on-turning-the-RFX900-to-an-RFX1800-and-back-again-td6399750.html#a6399750

    The above reference mentionas that any wrong attempt in fixing the c204  can result in burning transmit amplifier. 
I 
have got few questions about it and a help on it would be higly appreciated. Here are those q's

1) Does really the transmit amplifier
burns?If yes is there a way to confirm it? If it is burnt,  can it be
repaired? If yes how? Can I get it done using components available in
the market 
2) Is there a way to verify that the 1000pf
capacitor is properly installed, I mean to say using the digital
multimeter can I verify that the capacitor is completing the path
between the transmitter and the pcb.

The usrp_fft.py and usrp_printt_db.py works fine, am able to see the spikes also. I am using the 1.6 version of openbts.

Any help to solve this problem would be highly
appreciated and if you have got any opinion/options to make it running,
please do disclose it, I would really appreciate it. Thanks. 
 

Sincerely,
Ashish.


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