Usrp1 suddenly stops communicating

Hi All,

The free USRP1 has suddenly decided to stop communicating. We suspect
(from the output)
that it might be an USB problem?

It runs for about 30 - 60 secs and then freezes. The led on the
motherboard is still blinking though.
We’ve tried to plug into other USB ports and using different cables but
the result is always the same.

F12 is used with all the latest updates.

Screenshots when it halts @
http://www.poes-weather.com/~patrik/usrp/usb-fail/
Notice the serialnumber is all zeros, perhaps cos it is a preversion?

Suggestions what to try next appreciated,
Patrik

On Wed, Aug 4, 2010 at 3:30 PM, Patrik T. [email protected]
wrote:

Hi All,

The free USRP1 has suddenly decided to stop communicating. We suspect (from
the output)
that it might be an USB problem?

Very likely.

It runs for about 30 - 60 secs and then freezes. The led on the motherboard
is still blinking though.
We’ve tried to plug into other USB ports and using different cables but the
result is always the same.

Is the led blinking slow - signifying loaded firmware - or fast like
at power up? Do any notable USB messages show up in the dmesg output?
Have you tried the usrp on another machine?

F12 is used with all the latest updates.

Screenshots when it halts @
http://www.poes-weather.com/~patrik/usrp/usb-fail/
Notice the serialnumber is all zeros, perhaps cos it is a preversion?

What is the actual serial number marked on the board?

Thomas

On 5 August 2010 00:30, Patrik T. [email protected] wrote:

F12 is used with all the latest updates.

Screenshots when it halts @
http://www.poes-weather.com/~patrik/usrp/usb-fail/
Notice the serialnumber is all zeros, perhaps cos it is a preversion?

Suggestions what to try next appreciated,

Occasionally, I also see “write_cmd failed” on my USRP and I suspect
it is due to bad electrical connection. I know for sure my USRP has
been exposed to enough physical stress to have a bad USB connector.

Alex

Hi All,

OUR mistake ofcource!

We were feeding the USRP only 5 VDC and bet it dropped < 5VDC when
queried…

Patrik

----- Original Message -----
From: “Alexandru C.” [email protected]
To: “Patrik T.” [email protected]
Cc: [email protected]; “Jamie M.” [email protected];
“Jerry” [email protected]
Sent: Thursday, August 05, 2010 12:31
Subject: Re: [Discuss-gnuradio] usrp1 suddenly stops communicating

On 5 August 2010 00:30, Patrik T. [email protected] wrote:

We’ve tried to plug into other USB ports and using different cables but
the
result is always the same.

F12 is used with all the latest updates.

Screenshots when it halts @
http://www.poes-weather.com/~patrik/usrp/usb-fail/
Notice the serialnumber is all zeros, perhaps cos it is a preversion?

Suggestions what to try next appreciated,

Occasionally, I also see “write_cmd failed” on my USRP and I suspect
it is due to bad electrical connection. I know for sure my USRP has
been exposed to enough physical stress to have a bad USB connector.

Alex

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