I’m working with the TwinRX and am having the same results as Emanuel. I was ignoring the warning about the sample rate but you said that it must run at 200MHz. Can you explain why UHD sets the sample rate to 100MHz if 200 is required?
Thanks, -Kevin On Mon, 14 Jan 2019 at 7:06 AM Emanuel via USRP-users <usrp-users@lists.ettus.com<mailto:usrp-users@lists.ettus.com>> wrote: Dear Martin, thank you for clarification. Yes, please add this to the manual. We bought those TwinRX for some phase-coherent LTE signal reception, and now they seem to be not useful at all (without effort spent in sample rate conversion in post-processing etc.) I'm still wondering about the master clock rate though: I tried the benchmark with the following settings: ./benchmark_rate --args "master_clock_rate=200e6" --rx_subdev A:0 --rx_rate 10e6 The TwinRX is mounted on slot A and a CBX-120 is mounted on slot B. I simply wanted a streaming test on the first TwinRX channel. During device initialization I get the following warnings, see below. Can you please comment on them? [INFO] [0/DUC_1] Initializing block control (NOC ID: 0xD0C0000000000000) [WARNING] [X300] Cannot update master clock rate! X300 Series does not allow changing the clock rate during runtime. [WARNING] [X300 RADIO] Requesting invalid sampling rate from device: 200 MHz. Actual rate is: 100 MHz. Using Device: Single USRP: Device: X-Series Device Mboard 0: X310 RX Channel: 0 RX DSP: 0 RX Dboard: A RX Subdev: TwinRX RX0 TX Channel: 0 TX DSP: 0 TX Dboard: A TX Subdev: Unknown (0x0094) - 0 TX Channel: 1 TX DSP: 0 TX Dboard: B TX Subdev: CBX-120 TX [00:00:05.874991] Setting device timestamp to 0... ..... Cheers, Emanuel _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
