I’m running GNU Radio on a Dell Precision 530MT workstation under
Ubuntu. Unfortunately, the system only has USB 1.0 ports. I installed
an 6-port USB 2.0 add-on PCI card, but I only get a maximum transfer
rate of 16 Mbps when I run “benchmark_usb.py” from
“gnuradio-examples/python/usrp”. I also ran “test_usrp_standard_tx” and
“test_usrp_standard_rx” from “usrp/host/apps”. The transmit part worked
fine, but I got a lot of over-runs on receive. My add-on card is based
on the NEC chipset, which I gather is not capable of achieving a maximum
rate of 32 Mbps with the USRP. Are there other cards and/or chipsets
that achieve 32 Mbps? It’s hard to come across a card that isn’t based
on the NEC chipset. Matt E. mentioned that the Zonet PCMCIA card
based on the VIA chipset works good. Is there one in the PCI
form-factor that works as well? Any suggestions are appreciated. Thank
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