Re: [USRP-users] AGC overloading ADC Ettus B200 mini

Thanks so much Tom and everyone for help. It is working now. I changed the default values of AGC registers in ad9361_device_t::_setup_gain_control inside " host/lib/usrp/common/ad9361_driver/ad9361_device.cpp

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

Attached is the first few samples that show the clipping effect. I found that Wire Format is set to 'automatic.' Thanks. On Wed, Mar 28, 2018 at 7:25 PM, Ahmed Hamza wrote: > Hi Marcus, > > Thanks for your reply. > I am sure that I am using the correct format and that the maximum is +/- > 2048

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

Hi Marcus, Thanks for your reply. I am sure that I am using the correct format and that the maximum is +/- 2048 because I am able to decode the signal. Also, the capture plot I have given before was after 20 seconds of receiver operation but if I do not wait and capture from the first sample, I s

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

On 03/28/2018 05:59 PM, Ahmed Hamza wrote: Thanks Marcus and Julian for your responses. The signal is not narrowband. It is 6 MHz bandwidth, please see the attached snapshot from the GNU radio spectrum analyzer. Also, the signal is continuous without gaps. The unique thing about the signal is t

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

Thanks Tom so much for this hint. I am using the uhd driver that comes prebuilt with the distribution. I will try to make the suggested changes and rebuild the UHD and try. I will keep you updated. Best Regards, Ahmed On Wed, Mar 28, 2018 at 4:47 PM, Tom Bereknyei wrote: > In case it helps, the

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

In case it helps, the changes in this commit helped me get AGC working using RFNoC/GNURadio when I couldn't find the right hooks to do it via the API. https://github.com/tomberek/uhd/commit/c491f3e0f44ea457003852883ff742551a57e785#diff-dff9438dbbf09c43d9ccbf24a04e2cb6 On Wed, Mar 28, 2018 at 4:

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

Hey, > Is your signal very narrowband? Also, keep in mind, that the AGC defaults to the 'slow' mode when enabled. This mode is intended for signals like FM broadcast. So if your signal is coming in bursts, the AGC won't be able to handle it properly. Cheers, Julian Marcus D. Leech via USRP-use

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

On 03/28/2018 01:50 PM, Ahmed Hamza wrote: Hi Marcus, Thank you for your prompt response. I can change the TX power, kindly find attached the received"I" channel in case of TX power -25 dbm and -45 dbm. Also, there is about 10 dB attenuation before the Ettus RX. As you can see, there are man

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

Hi Marcus, Thank you for your prompt response. I can change the TX power, kindly find attached the received "I" channel in case of TX power -25 dbm and -45 dbm. Also, there is about 10 dB attenuation before the Ettus RX. As you can see, there are many samples that goes to +/- 2048 and I believe

Re: [USRP-users] AGC overloading ADC Ettus B200 mini

On 03/28/2018 11:32 AM, Ahmed Hamza via USRP-users wrote: Hi, I am using Ettus B200 mini, to receive signal at carrier frequency 725 MHz and the bandwidth is 6 MHz. The sampling rate is set to 13.28 MHz. I enabled AGC by calling set_rx_agc() from set_gain inside /usrp_source_impl.cc. The thi

[USRP-users] AGC overloading ADC Ettus B200 mini

Hi, I am using Ettus B200 mini, to receive signal at carrier frequency 725 MHz and the bandwidth is 6 MHz. The sampling rate is set to 13.28 MHz. I enabled AGC by calling set_rx_agc() from set_gain inside /usrp_source_impl.cc. The thing is that I am receiving a signal with a maximum that reach +