With the downloaded images for UHD-4.0 I saw a couple of things: 1) The CPU clock speed is set for speed grade 1 parts, not speed grade 3. 2) UHD-4.0 hangs after a while at higher data rates, I've also seen this on a b200.
If there are fixes for these issues, you might get a bit more transfer rate. Not sure it will get you the speed you need though. Philip On 11/22/20 9:20 PM, Joe Crossen wrote: > Hi all, > > I'm attempting to use the USRP E312 as a wifi node using the gr-ieee802.11 > module... > though for now I'm testing basic USRP functionality with a couple of simple > GNU graphs. > > Here's my setup: > - the host is an Ubuntu 18.04 virtual machine with a bridged adaptor. > Firewall disabled. > - the USRP is the E312, connected via ethernet to the host network. > - the host and USRP are both running GR3.8 and UHD4.0 (Zeus branch). > - the host can see the USRP with uhd_usrp_probe. > - the USRP is running the following GNU graph - UHD:USRP Source -> UDP Sink. > - host is running the following GNU graph - UDP Source -> QT GUI Sink. > - all block parameters are default. > > I'm experiencing the following issues: > 1. For sample rates > ~2Msps, the USRP spams overrun "O" and "D" characters > (what does the "D" signify?) , regardless of whether the host graph is > running or not. > 2. At any sample rate the host graph spams the following message (when the > USRP graph is running) - "gr::log :WARN: udp_source0 - Too much data; > dropping packet." > > And a question: > 3. What sample rates are realistic for this setup, and what are the > limitations? wifi channels span 20MHz, so I'm hoping to run at 20Msps > > Thanks, > Joe >
