Re: After calling stop(), USRP still seems active

Eric B. wrote:

Can you send me the complete script off the list?

Hi Eric,

Thanks for your response! I have attached, which since my
last post I have checked and changed slightly, but the problem doesn’t
seem to be there.

BTW, what are you really trying to accomplish?

I am developing a USRP Server computer that can be controlled from any
client computer, (clients run Matlab under Windows). Clients require the
ability to terminate running flow graphs, hence my requirement for
stop(). To test the stop() functionality (independent of my threaded
server code) I am running in the python interpreter.

from test_tone import *
tone = test_tone()

The only way I can get the USRP to actually stop transmitting something
is to delete my instantiated test_tone object. Calling stop() stops the
tone but the USRP still transmits something (difference between actually
being off and pretending to be off is 40 dB).

Also, can you figure out how to get rid of this signature?
It’s not appropriate for posting to what is obviously a public mailing

I am sorry about the signature but unfortunately it is attached as it
leaves. Maybe I should setup an external email address.


Thanks for your help,


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I think this could be a symptom of using an older version bitfile for
fpga load, where the fifo’s held the last value when emptied instead of
being zero’d. (?)

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