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. Dave KI4PSR
(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" [email protected]
I have a periodic 'polling?' noise issue with my Yaesu FT-897