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VHF issue |
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Tiptel 
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Joined: 01 Jan 2015 Location: EDFC Status: Offline Points: 5 |
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 Topic: VHF issuePosted: 15 Dec 2015 at 6:09am |
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Hello! I have a Problem with only one of my double IFD440s: Sometimes I can see a red "x" at VHF on the system status page. I can't find any problems with the radio function, but what's the matter for the "x"? ... and I'm not very often in the maintenance mode. Sometimes it's there, sometimes not... Best regards, Heiko
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edanford
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Joined: 21 Nov 2011 Location: Austin Tx Status: Offline Points: 116 |
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Posted: 15 Dec 2015 at 11:38am |
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I saw the same thing yesterday when looking over my screens after 10.1.1.0 upgrade
No VHF issues I am aware of |
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Ed
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AviJake
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Joined: 26 Mar 2009 Location: Lincoln MA Status: Offline Points: 2815 |
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Posted: 15 Dec 2015 at 12:08pm |
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You guys doing this with your prop spinning and all electrical buses on or is this battery only behavior? The point of the question is a matter of input voltage to the IFD.
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Steve Jacobson
sjacobson@avidyne.com |
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edanford
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Joined: 21 Nov 2011 Location: Austin Tx Status: Offline Points: 116 |
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Posted: 15 Dec 2015 at 1:27pm |
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I was at about 21 Vdc running off external bat I have for playing with avionics.
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Ed
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Tiptel
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Posted: 15 Dec 2015 at 3:08pm |
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With full battery (24 V) and without engine running. Thought I could verify an influence of my battery minder, but not allways.
Software version 10.1.0.0 Btw: Absolut great units! Edited by Tiptel - 15 Dec 2015 at 3:09pm |
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AviJake
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Joined: 26 Mar 2009 Location: Lincoln MA Status: Offline Points: 2815 |
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Posted: 15 Dec 2015 at 3:12pm |
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In the absence of any other data, I suspect you are hitting a voltage limit (on the low end). It's worth noting the behavior in a "full-up" airplane with prop spinning and all buses on. I bet everything is just fine in that case.
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Steve Jacobson
sjacobson@avidyne.com |
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Tiptel
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Posted: 15 Dec 2015 at 3:17pm |
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Will check that - thanks for your fast replay!
Do you need log files? Edited by Tiptel - 15 Dec 2015 at 3:18pm |
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brou0040
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Joined: 13 Dec 2012 Location: KIYK Status: Offline Points: 720 |
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Posted: 15 Dec 2015 at 10:50pm |
AviJake, it sounds like the people that saw the x's did not notice any radio issues. Can you tell us what if any reduced functionality that x indicates? Do the x's correlate with the voltage limits of the table that describes what shuts down at different voltage levels?
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AviJake wrote: