What is the typical max USB transfer rate from the URSP?

GNU Radio
1

I got my USRP running today. The first test I ran was the usb speed
test in the examples/usrp folder. It will do up to 16MB/s. The 32 MB/s
transfer fails. This is a dual Opteron system with 4G of memory running
Suse 10.1. Any advise on getting to 32 MB/s. I don’t remember what
chipset is on the USB2.0 card but I do remember that I choose it
specifically because it had good Linux support. NEC maybe??
Thanks,
Jim

2

Jim P. wrote:

I got my USRP running today. The first test I ran was the usb speed
test in the examples/usrp folder. It will do up to 16MB/s. The 32
MB/s transfer fails. This is a dual Opteron system with 4G of memory
running Suse 10.1. Any advise on getting to 32 MB/s. I don’t
remember what chipset is on the USB2.0 card but I do remember that I
choose it specifically because it had good Linux support. NEC maybe??

Use the USB 2.0 which is built into the motherboard. The add-in cards,
especially the NEC one, will not be capable of full bandwidth operation.

Matt

3

On Thu, Apr 26, 2007 at 09:07:33PM -0500, Jim P. wrote:

Unfortunately the motherboard does not have USB2.0 built in. Why do the
add-in cards have a speed issue?
-Jim

Why do chip designers design lame chips?

Eric

4

Unfortunately the motherboard does not have USB2.0 built in. Why do the
add-in cards have a speed issue?
-Jim