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Hello all. This is my first post here so hopefully it will stand
the expectations.
Device - N310 with UHD 3.13.0.2-0-uknown serial=31950A8 Host - rebuilt UHD on the host computer, using 3.14.0.HEAD-0-g6875d061 connected via mgmt via 1Gb eth, and 2 sfp ports. cpu_governor is set to performance (4 cores at 3.75GHz) network buffers (r_mem/w_mem) are 625,000,000 1. Once upgraded the host's UHD to 3.14.0 (and the FPGA image as well), we keep getting "Could not determine link speed; using 1GibE max speed of 125000000". (These messages were not there before the upgrade). Is there any way to connect with both 10Gb connections and get feedback that this link speed is used by the software? 2. I cannot manage to sample for periods longer than 0.06 sec (0.08 fails) on 4 channels. the benchmark_rate example application cannot reach 10 seconds without DDD or DDODD on sampling rate of 30.72e6 when clock is 122.88e6 . This limitation is fairly reproducable. Also it does not matter if I use GnuRadio or "rx_samples_to_file". Anyway data is routed to a ramdrive (write speed should be > 2Gbyte/sec). What I need is about 3 seconds of continuous capture. 3. If I use usrp->set_time_source("external") I get an error "At least one PLL did not lock!" or "Failed to capture PPS within 1.1 seconds. TDC_STATUS: 0x0" and if I use "gpsdo", I cannot get any feedback that gps is pps locked and used. only the message "1) catch time transition at pps edge 2) set times next pps (synchronously)" - does it mean that gps is locked? 4. how can I get NMEA string from the internal GPSDO of the N310? Thanks in advance, Baroch Oren --
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