[amsat-bb] Re: Yaesu FT-897 and HRD satellite tracking problem
dave at lostfrogs.com
Wed Dec 26 12:05:39 PST 2007
Thank you Simon, and I appreciate the response from the guru as I
appreciate your fine program!
I have tried all of the procedures I could glean from the HRD forum and
messages on the pertinent Yaesu group, and eham. I have grounded,
beaded with ferrites, shielded, tried different cables etc., and I still
get the chuff-chuffing noise that coincides with the black square
animation on the upper left of the satellite tracking tool screen.
I have tried different CAT baud rates, and switched from a RS-232
interface to a USB interface. (I still have another more direct USB
attempt to make after I build the Ham Gadgets interface). And although
I presently have a few beads on the CT-62 cable I guess I can add a few
more beads and a few more loops through them, but so far there has been
absolutely no difference notices with or without the beads.
Advice on the HRD forums follows yours: 'noise radiating from the CT-62
cable'. I don't think it is in this case as I have tested and improved
the shielding and added ferrites, etc.
My experiments suggest that this may be a problem inherent to the rig,
maybe losing its control of receiver parameters momentarily as it acts
on the repetitive CAT data. And finally a user in the Yaesu group
suggests that this problem is normal for these Yaesu FT-897/857 rigs and
some others. But that user mentions simply turning off the polling to
avoid the noise. I want to use the HRD automatic Doppler shift
tracking, so I need at least some periodic polling to update the rig.
Thanks you Simon for your timely response!
I will keep looking and experimenting.
(I would appreciate hearing from any users of an FT-897 or FT-857 who
are using the satellite tracking tool in HRD with polling to track the
Doppler shift. Do you have the same chuff-chuffing? Did you find a fix?)
Simon Brown (HB9DRV) wrote:
> Sounds like radiation from the CT-62 cable - try putting a ferrite or
> two on the cable.
> Simon Brown, HB9DRV
> ----- Original Message ----- From: "Dave Matthews" <dave at lostfrogs.com>
>> I have a periodic 'polling?' noise issue with my Yaesu FT-897
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