Thanks Marcus for the quick reply! I have a B210 with a GPSDO (the TCXO one).
And the system is “offline only” now but I can manually type a response with something specific if you like. So I have a little checkbox that I click on my GRC GUI that starts the recording to a File Sink from a “UHD: USRP Source”. Here’s some details of what I have specified in the UHD: USRP Source - File Sink Box Pair. UHD: USRP Source GENERAL Output Type: Complex float32 Wire Format: Complex int8 Stream args: peak=0.003906 Stream Channels: [] Device Address: Device Arguments: “send_frame_size=8192” Sync: Unknown PPS Clock Rate (Hz): Default Num Mboards: 1 Mb0 Clock Source: Default Mb0 Time Source: Default Mb0 Subdev Spec: A:A Num Channels: 1 Samp rate (Sps): 2000000 ADVANCED Alias: Affinity: Minoutbuf: 8192 Maxoutbuf: 8192 Show LO Controls: OFF Comment: RF OPTIONS Ch0 Center Freq: 2000000000 Ch0 AGC: Default Ch0: Gain Value: 30 Ch0 Antenna: RX2 Ch0 Bandwidth: 0.2MHz FE CORRECTIONS Ch0 Enable DC Offset Correction: true Ch0 Enable IQ Imbalance Correction: true [FILE SINK] GENERAL File: [Your favorite file name here] Input Type: complex Vec length: 1 Unbuffered: OFF Append file: OFF Does this help at all? I tried the ./rx_samples_to_file from within “/usr/lib/uhd/examples” with similar options but I don’t see an O/U with the selected options. Is this a GRC thing? I have no idea… From: Marcus D Leech [mailto:[email protected]] Sent: Tuesday, April 27, 2021 1:37 PM To: Hirst (US), Stephen <[email protected]> Cc: [email protected] Subject: [EXTERNAL] Re: [USRP-users] Underflows/Overflows, Filesize and a Complete N00B EXT email: be mindful of links/attachments. If you just use the rx_samples_to_file utility that comes with UHD what are your results Can you share your GNuRadio flow graph with us? What type of USRP do you have? There are about a dozen different models of USRP out there. Sent from my iPhone On Apr 27, 2021, at 1:24 PM, Hirst (US), Stephen <[email protected]<mailto:[email protected]>> wrote: Hi Guys, I appreciate you all and thank you for the great community that is this mailing list! Continue on! I, however, am a complete N00B and require assistance on some seemingly minor tasks that I believe you could help me out on. :) With that being said, I find myself with the Ubuntu 20.04LTS install on a rather “fast” Dell laptop (specs down below.) - 8th Gen Intel Core i7-8650U Processor (Quad Core, 8M Cache, 1.9GHz,15W, vPro) - 16GB, 2x8GB, 2666MHz DDR4 Non-ECC - M.2 1TB PCIe NVMe Class 40 Opal 2.0 Self Encrypting Solid State Drive I have fiddled around with an online install on the laptop but I haven’t gotten the overflows and underflows to cooperate. And to be more specific, I can record a sample rate of 2Mhz and 0.2Mhz bandwidth without issue, but I can’t get a SR or BW greater than those to work without Under/Overflows developing. (I have been using UHD 3.15.0.02build5 with GNURadio 3.8.1.0 (Python 3.8.2) (grc and grc-uhd) and installed everything with “apt”. The first line in my grc python output labels “Linux GNU C++ version 9.2.1 20200304; Boost_107100; UHD_3.15.0.0-2build5”, USB3.0). Any ideas? I tried both the num_recv_frame size stuff and setting high priority with no joy, but then again, I am a N00b, so I may not have done that correctly as well… Also if anyone has experience with GRC specifically, I have had success recording what I wanted to with a file with the 2MHz Sample Rate with a 0.2 MHz BW, but the files are pretty huge. We’re talking 1GB/min… Any idea how to make the GRC record to a less-fine resolution so I can free up some HDD space? Thanks guys! Ya Boi Steve _______________________________________________ USRP-users mailing list -- [email protected]<mailto:[email protected]> To unsubscribe send an email to [email protected]<mailto:[email protected]>
_______________________________________________ USRP-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
