Re: [Discuss-gnuradio] Amplifier

2012-05-09 Thread Cristian Rougier
Hello, and thank you for your answer i have GSM.PowerAttenDB 23 Do you think that i need to increase ? Regards Cristian El 2012-05-09 20:00, wayne roberts escribió: > The amplifier you have is both a receiver amplifier and transmitter amplifier. > The receive side (uplink) says its

Re: [Discuss-gnuradio] Amplifier

2012-05-09 Thread wayne roberts
The amplifier you have is both a receiver amplifier and transmitter amplifier. The receive side (uplink) says its 70dB gain, but hopefully that is with ALC. You could likely overload usrp receiver easily from that. The OpenBTS.config has GSM.PowerAttenDB which you can try increasing to reduce powe

Re: [Discuss-gnuradio] Amplifier

2012-05-09 Thread Cristian Rougier
Hello, Wayne, thank you very much for your answer. This is the amplifier and duplexer specs: (i paste this in order to dont attach the doc). AMPLIFIER Shenzhen Ledmate Technology Co., Ltd. PCS Signal Booster Technical Features: *Receiving and sending separation,low require for Ant isolation

Re: [Discuss-gnuradio] Amplifier

2012-05-09 Thread wayne roberts
You should know the gain of your amplifier. I would suspect that OpenBTS has USRP output power set to high level for direct antenna connection.This is probably too much for your amplifier. Try reducing your USRP output power to minimum level, then slowly increase it while observing your amplifi

[Discuss-gnuradio] Amplifier

2012-05-09 Thread Cristian Rougier
Hello, i'm working in a private project with USRP 1 and OpenBTS on PCS 1900MHZ. Currently im working with chinesse (Ledmate.net) 25 dbm amplifier and duplexer for pcs 1900, this works, but i having problems in some areas, i can't register any phones. Can anybody tell me what is the best ampl