Hi all,
I hope someone has suggestion as to what is going on but in the process of setting up my ipad as part of for navigation i have run into something that doesn't make sense to me.
I have navman instruments (wind depth and speed) and in the case of speed and depth I have a separate additional combo unit. i have set up three of the instruments at the chart table with the additional depth sounder in a navpod along with the ipad and autopilot at the wheel.
i needed to explain the layout a bit but this is where the part that i don't understand what comes into play. when i have just the depth sounder and autopilot(raymarine wheel pilot) on everything is right with the world the sounder sounds and the autopilot pilots, if i plug the IPAD in to the USB connection i have set up at the wheel the sounder either stops working or gives false readings. i should add that when this problem first occurred I thought it was because the two units were pulling from the same power source so i added an additional power source but with the same results.
in addition to what was going on at the steering station i saw the same issue when i connected the depth sounder transducer to the unit at the chart table BUT only when all the other instruments were connected and powered up.
it appears to me that somehow the other powered units are affecting the signal from the transducer and it doesn't necessarily appear to be the length of the cable run. I think i need to provide shielding but i'm not sure how or what that would be necessary. I'm hoping someone else might have a better idea of what is going on and how i can address it since i would like to get this to work
Mike Hogan
s/v Ciscocat #226
Mark I XP25, std rig
Hi;
You might need to provide a bit more information for troubleshooting...
Is this a new installation?
What recent changes or modifications have been made to the original setup?
---- Howard & Linda Matwick ----
--- S/V "Silhouette" - Nanaimo, BC ----
--- 1999 C36 MkII #1776 M35BC ---
the instruments are not new, i previously had them installed in a smaller navpod at the helm and they worked fine. what IS different is that i have a much bigger navpod with my control head for the autopilot with a seatalk connection from the raymarine computer a single depth sounder at the helm and a USB connection for a IPAD connection. If the USB connection is not connected to the IPAD the depth sounder works just fine. if the USB connection IS connected to the IPAD then the depth sounder goes all wonky. The USB connection and the depth sounder connection are on separate dc circuits that was not originally the case when if first set things up and I originally thought it had something to do with both devices being run off the same circuit that is when i put them on seperate circuits, I am almost sure it has something to do with some type of electrically interference i just don't know enough about that type of thing to know what to look for or how to prevent it
Mike Hogan
s/v Ciscocat #226
Mark I XP25, std rig
Hi,
What happens when you have the ipad in "airplane mode on"? wifi off? bluetooth off?
What happens when you plug in something else like your MP3 player or cell phone?
don't know, i talked to a friend of mine that knows more than me about this stuff and I read the installation manual. I believe the problem is the closeness of the other electrical components to the depth sounder cable. I'll try those things that were suggested but i've also looked at getting a shielded connector for the ipad to see what if that does anything. my friend also suggested that it might the the 12 to 5 volt connector that i have installed in the navpod so i'm going to try removing that from the navpod to see if that makes any difference. it almost sounds like i need to somehow shield the depth sounder and cable from everything else but i don't have a clue how i would go about doing that. well at least i won't be bored when i go to the boat this weekend...: >
Mike Hogan
s/v Ciscocat #226
Mark I XP25, std rig
well i checked with navonics (formerly navman's tech support) and while i haven't confirmed this yet they said that the interference had to be "controlled" from the source rather than the destination. they suggested using ferrets(not the furry kind) on the source of the electromagnetic field generation(?) BUT they said that if the ferrets were not the correct size (?) that it would not help. any of that make sense to anyone? as Dezi said Lucy you have some 'plain to do. I'll be up at the boat this weekend and see if i can figger out what is going on. i know the only people that might care are ones with navman depth sounder(not to many of us) but it may have some bearing on other instruments... keep you posted..
Mike Hogan
s/v Ciscocat #226
Mark I XP25, std rig
I think they meant ferrous (not the furry kind).
They are small chunks of metal that snap around a wire, designed to absorb electrical 'spikes' and other electrical noise that might be 'transmitted' from one wire to another. Maybe Radio Shack will have them. Not expensive...or shouldn't be expensive anyway.
Larry Brandt
S/V High Flight #2109
Pacific Northwest, PDX-based
2002 C-36 mkII SR/FK M35B
I think they're talking about ferrites.
[url]https://www.google.ca/search?q=ferrites&hl=en&client=firefox-a&hs=gXn&rl...