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Re: [Discuss-gnuradio] USRP heating up !
From: |
Matt Ettus |
Subject: |
Re: [Discuss-gnuradio] USRP heating up ! |
Date: |
Tue, 5 Apr 2005 10:21:59 -0700 |
User-agent: |
Internet Messaging Program (IMP) 4.0-cvs |
Quoting Javs <address@hidden>:
> Dear all,
>
> The Analog Device chips on my USRP (and to some extent the FPGA) seem to be
> heating more than usual now. On a touch basis, I observed that they are much
> heated (burning sensation) than they were before. I've been using it for
> about 40 days now. I haven't done anything unusual with it. However, it seems
> to be running the software perfectly the way it should. Am I the only one who
> is experiencing this ? I am thinking of a fan to cool the chips to avoid
> burning them. Any suggestions ?
During normal operation, the AD chips can get pretty warm. Try this:
1 - Take off all daughterboards.
2 - Plug in the the USRP. Do not run any software. Leave it for a few minutes.
Every chip other than the power supply on there should be at room temp. The
LED should be flashing about 2-3 times per second.
3 - Run some of the examples, and quit them normally (no ctrl-C). A few minutes
later the FPGA and AD chips should be back to room temp. The LED should be
flashing slower.
4 - Run a receive program (like usrp_fft). After a few minutes, the AD chip
should be just slightly warm.
5 - Leave the receive program running. In another window start up a transmit
program (like usrp_siggen). The codec chips should get pretty hot, but not
painfully hot. The FPGA should only show the slightest hint of warmness.
6 - Quit the receive program. The chips shoul get much cooler now.
7 - quit the transmit program. Everything should return to room temp.
Let me know if your experience matches what I outlined above.
Matt
Re: [Discuss-gnuradio] USRP heating up !, Javs, 2005/04/12
Re: [Discuss-gnuradio] USRP heating up !, Javs, 2005/04/21