Hi I'm a hardware developer who is trying to get the B200 working. Everything seemed fine until I actually connected a spectrum analyzer to the tx output to find no output when the TX led is red. Ive measured the output with both spec and oscilloscope during benchmark and tx_waveforms with this command ./tx_waveforms --freq 915e6 --rate 5e6 --gain 10 --wave-type SINE --wave-freq 915e1
I've probed the circuit board along the TX signal path up to the analog devices chip, nothing but DC-voltages. Receiveing works excellent. Does this mean that the board output is dead or can in be software related? I'll paste the uhd probe output: ~ $ uhd_usrp_probe [INFO] [UHD] linux; GNU C++ version 8.2.0; Boost_106200; UHD_3.13.0.HEAD-0-g0ddc19e5 [INFO] [B200] Detected Device: B200 [INFO] [B200] Loading FPGA image: /usr/local/share/uhd/images/ usrp_b200_fpga.bin... [INFO] [B200] Operating over USB 3. [INFO] [B200] Detecting internal GPSDO.... [INFO] [GPS] No GPSDO found [INFO] [B200] Initialize CODEC control... [INFO] [B200] Initialize Radio control... [INFO] [B200] Performing register loopback test... [INFO] [B200] Register loopback test passed [INFO] [B200] Setting master clock rate selection to 'automatic'. [INFO] [B200] Asking for clock rate 16.000000 MHz... [INFO] [B200] Actually got clock rate 16.000000 MHz. _____________________________________________________ / | Device: B-Series Device | _____________________________________________________ | / | | Mboard: B200 | | revision: 5 | | product: 1 | | serial: 3134BB7 | | name: MyB200 | | FW Version: 8.0 | | FPGA Version: 15.0 | | | | 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 Dboard: A | | | _____________________________________________________ | | | / | | | | RX Frontend: A | | | | 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: B200 RX dual ADC | | | | Gain Elements: None | | _____________________________________________________ | | / | | | TX DSP: 0 | | | | | | Freq range: -8.000 to 8.000 MHz | | _____________________________________________________ | | / | | | TX Dboard: A | | | _____________________________________________________ | | | / | | | | TX Frontend: A | | | | 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 0.2 dB | | | | Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz | | | | Connection Type: IQ | | | | Uses LO offset: No | | | _____________________________________________________ | | | / | | | | TX Codec: A | | | | Name: B200 TX dual DAC | | | | Gain Elements: None best regards /Johan
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