Hello Jonathan, The gain setting in the USRPs are indexed from minimum gain. On most this means a gain of 0 is actually an attenuation of the signal. The N210's gain range is based on what amplifiers and attenuators are on the daughterboard that is installed. The ranges aren't calibrated to be aligned across different USRP products so what you are seeing is completely normal.
On Feb 12, 2018 10:21 PM, "Jonathan B via USRP-users" < usrp-users@lists.ettus.com> wrote: Hi Marcus, Thanks! Didn't realise there was a larger range for the B2xx family. At 60dB it seems to perform as well as 20dB on the N210. Is that normal? But either way - something I can work with. Thanks. <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> Virus-free. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> <#m_-3868461721852336890_m_4051027392395733961_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> 2018-02-09 20:53 GMT+01:00 Marcus D. Leech via USRP-users < usrp-users@lists.ettus.com>: > On 02/09/2018 02:48 PM, Jonathan B via USRP-users wrote: > > Hi Jeff, > > Thanks for the response. > > In both cases a gain of 20dB. > > Best, > Jonathan > > The total gain-control range on the B2xx family is larger (80dB) than on > the cards used on X3xxx, N2xx, etc (typically 30.5dB) > > Try larger gain values on the B210, like 40 or 50dB. > > > > On Feb 9, 2018 8:23 PM, "Jeff Long via USRP-users" < > usrp-users@lists.ettus.com> wrote: > >> What are you using for gain settings? >> >> On 02/09/2018 01:09 PM, Jonathan B via USRP-users wrote: >> >>> Hi everyone, >>> >>> I seem to be having issues with the B210 transmitting at an incredibly >>> low power. >>> >>> I seem to be getting a 60db difference at the receiver (spectrum >>> analyzer) between the B210 and N210 with perfectly identically configured >>> transmissions using the simple uhd "tx_waveform" example program. >>> >>> Has anyone experienced such an issue. I have two B210s that seem to be >>> acting the same way. >>> >>> Thanks in advance. >>> >>> Best Regards, >>> Jonathan >>> >>> ----------------------------------------- >>> >>> Probe Output of the B210: >>> >>> -- Loading firmware image: C:\Program Files\GNURadio-3.7\share\uhd\i >>> mages\usrp_b200_fw.hex... >>> -- Detected Device: B210 >>> -- Loading FPGA image: C:\Program >>> Files\GNURadio-3.7\share\uhd\images\usrp_b210_fpga.bin... >>> done >>> -- Operating over USB 3. >>> -- Detecting internal GPSDO.... No GPSDO found >>> -- Initialize CODEC control... >>> -- Initialize Radio control... >>> -- Performing register loopback test... pass >>> -- Performing register loopback test... pass >>> -- Performing CODEC loopback test... pass >>> -- Performing CODEC loopback test... pass >>> -- Setting master clock rate selection to 'automatic'. >>> -- Asking for clock rate 16.000000 MHz... >>> -- Actually got clock rate 16.000000 MHz. >>> -- Performing timer loopback test... pass >>> -- Performing timer loopback test... pass >>> _____________________________________________________ >>> / >>> | Device: B-Series Device >>> | _____________________________________________________ >>> | / >>> | | Mboard: B210 >>> | | revision: 4 >>> | | product: 2 >>> | | serial: 3113A66 >>> | | name: MyB210 >>> | | FW Version: 8.0 >>> | | FPGA Version: 14.0 >>> | | >>> | | Time sources: none, internal, external, gpsdo >>> | | Clock sources: internal, external, gpsdo >>> | | Sensors: ref_locked >>> | | _____________________________________________________ >>> | | / >>> | | | RX DSP: 0 >>> | | | >>> | | | Freq range: -8.000 to 8.000 MHz >>> | | _____________________________________________________ >>> | | / >>> | | | RX DSP: 1 >>> | | | >>> | | | Freq range: -8.000 to 8.000 MHz >>> | | _____________________________________________________ >>> | | / >>> | | | RX Dboard: A >>> | | | _____________________________________________________ >>> | | | / >>> | | | | RX Frontend: A >>> | | | | Name: FE-RX2 >>> | | | | Antennas: TX/RX, RX2 >>> | | | | Sensors: temp, rssi, lo_locked >>> | | | | Freq range: 50.000 to 6000.000 MHz >>> | | | | Gain range PGA: 0.0 to 76.0 step 1.0 dB >>> | | | | Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz >>> | | | | Connection Type: IQ >>> | | | | Uses LO offset: No >>> | | | _____________________________________________________ >>> | | | / >>> | | | | RX Frontend: B >>> | | | | Name: FE-RX1 >>> | | | | Antennas: TX/RX, RX2 >>> | | | | Sensors: temp, rssi, lo_locked >>> | | | | Freq range: 50.000 to 6000.000 MHz >>> | | | | Gain range PGA: 0.0 to 76.0 step 1.0 dB >>> | | | | Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz >>> | | | | Connection Type: IQ >>> | | | | Uses LO offset: No >>> | | | _____________________________________________________ >>> | | | / >>> | | | | RX Codec: A >>> | | | | Name: B210 RX dual ADC >>> | | | | Gain Elements: None >>> | | _____________________________________________________ >>> | | / >>> | | | TX DSP: 0 >>> | | | >>> | | | Freq range: -8.000 to 8.000 MHz >>> | | _____________________________________________________ >>> | | / >>> | | | TX DSP: 1 >>> | | | >>> | | | Freq range: -8.000 to 8.000 MHz >>> | | _____________________________________________________ >>> | | / >>> | | | TX Dboard: A >>> | | | _____________________________________________________ >>> | | | / >>> | | | | TX Frontend: A >>> | | | | Name: FE-TX2 >>> | | | | Antennas: TX/RX >>> | | | | Sensors: temp, lo_locked >>> | | | | Freq range: 50.000 to 6000.000 MHz >>> | | | | Gain range PGA: 0.0 to 89.8 step 0.3 dB >>> | | | | Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz >>> | | | | Connection Type: IQ >>> | | | | Uses LO offset: No >>> | | | _____________________________________________________ >>> | | | / >>> | | | | TX Frontend: B >>> | | | | Name: FE-TX1 >>> | | | | Antennas: TX/RX >>> | | | | Sensors: temp, lo_locked >>> | | | | Freq range: 50.000 to 6000.000 MHz >>> | | | | Gain range PGA: 0.0 to 89.8 step 0.3 dB >>> | | | | Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz >>> | | | | Connection Type: IQ >>> | | | | Uses LO offset: No >>> | | | _____________________________________________________ >>> | | | / >>> | | | | TX Codec: A >>> | | | | Name: B210 TX dual DAC >>> | | | | Gain Elements: None >>> >>> <https://www.avast.com/sig-email?utm_medium=email&utm_source >>> =link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> >>> Virus-free. www.avast.com <https://www.avast.com/sig-ema >>> il?utm_medium=email&utm_source=link&utm_campaign=sig-email&u >>> tm_content=webmail&utm_term=link> >>> >>> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>> >>> >>> _______________________________________________ >>> USRP-users mailing list >>> USRP-users@lists.ettus.com >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >>> >>> >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> > > > _______________________________________________ > USRP-users mailing > listUSRP-users@lists.ettus.comhttp://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > > > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > > _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
_______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
