[amsat-bb] FT-847 CAT

Greg D ko6th.greg at gmail.com
Mon Jun 13 00:56:48 UTC 2016

Jeff Breitner wrote:
> On 6/12/16 2:10 PM, Greg D wrote:
>> Whenever I use Gpredict with my 847, I need to set the refresh rate to
>> about 5 seconds (5,000 ms).  Never understood why, but updating too
>> often quickly ends up with a hang.  This is on a Linux system with a
>> real serial port (not USB).  I'm using "rigctld -m 101 -r /dev/ttyS0 -t
>> 4532 -v -s 57600" as the run string for the rig control process.
>> Good luck,
>> Greg  KO6TH
> Yeah, I have to set it to no more than 2000ms or it causes Gpredict to
> cough and gasp.  Gpredict has multithreading, but the writes to the
> rig control appear to be blocking.  I don't think it matters much, the
> radio can only take the data so fast anyway.
> The radio works fine with any of the desktops I use, it just won't
> work with any of my portable computers.  Confirmed exact drivers in
> Windows, sniffed the ports in Linux and hooked up a 'scope to watch
> the waveforms.  Created test programs to try to look for buffering
> issues. Nothing is a smoking gun...'cept maybe that these USB->Serial
> converters are just good enough to work with (maybe) better chipsets
> that are on these desktop motherboards.  Dunno.
> I have a GearMo adapter showing up this week.  If it works, great, if
> not this smaller desktop will be what I use.
> What is so puzzling is that, it worked with everything up until a few
> weeks ago.
> Thanks,
> Jeff
> _______________________________________________


Just a wild thought.  What else could be different?

Greg   KO6TH

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