[eagle] Re: Jim's Phase Noise Number!!

Juan Rivera juan-rivera at sbcglobal.net
Mon Jun 11 16:04:27 PDT 2007


Stephen,

So it's the heartbeat timing is more than 3 seconds from the CDNC?  I'll
check that when I get home from work.  Thanks.

Juan


On 6/11/07, Stephen Moraco <kc0ftq at amsat.org> wrote:
>
> Juan,
>
> > Please refresh me on the function of the watchdog timer.
>
>    While the dongle may be powered up, can traffic needs to be sent to
>    the Widget at least once every three seconds or the watchdog will fire.
>
>   This watchdog is here to account for a number of possible system
>    issues.  Some of them are (1) CAN-Do is not hearing IHU CAN
>    traffic so it assumes it is not well and resets or (2) the CAN Do for
>    some reason locks up and can't receive CAN traffic in which case,
>    again, it resets.
>
>    The only CAN traffic that resets the watchdog timer is 'configure'
>    messages (Heartbeat traffic in CDNC terms).  So set the heartbeat
>    rate for something shorter than 3 seconds and you will not see any
>    watchdog resets.
>
>    This description help?
>
> Regards,
> Stephen
> --
>
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