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Frequency issue

Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=1897
Printed Date: 29 Mar 2024 at 11:00am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com


Topic: Frequency issue
Posted By: Jrlumpp
Subject: Frequency issue
Date Posted: 23 Nov 2019 at 11:49pm
I’m having a problem with my pre set frequency list on my 550. I have loaded approach control 125.970 in my list. When I activate this preset, it loads this number but in five seconds it , on its own changes to 125.965 , a Non working com frequency. This forces me to type the 125.970 manually then activate it. If I do it that way the number doesn’t change, yet from the preset list it flips to a close number after a few seconds. 
Has anyone encountered this issue?

John



Replies:
Posted By: Leonard
Date Posted: 29 Nov 2019 at 7:29pm
No,  but I have had recent experiences with the com/nav frequency box’s Xed and it took several on/off cycles to straighten out


Posted By: chflyer
Date Posted: 30 Nov 2019 at 5:29am
Originally posted by Leonard Leonard wrote:

I have had recent experiences with the com/nav frequency box’s Xed and it took several on/off cycles to straighten out

For the past few months I get this on my IFD440 on almost every startup, plus the No Com with VHF message. Sometimes multiple power cycles gets rid of it, mostly it disappears after 5-10 minutes and VHF com works again normally.


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Vince


Posted By: Leonard
Date Posted: 30 Nov 2019 at 8:34am
 startup, plus the No Com with VHF message

+1


Posted By: AviSteve
Date Posted: 30 Nov 2019 at 9:07pm
Originally posted by Jrlumpp Jrlumpp wrote:

I’m having a problem with my pre set frequency list on my 550. I have loaded approach control 125.970 in my list. When I activate this preset, it loads this number but in five seconds it , on its own changes to 125.965 , a Non working com frequency. This forces me to type the 125.970 manually then activate it. If I do it that way the number doesn’t change, yet from the preset list it flips to a close number after a few seconds. 
Has anyone encountered this issue?
A few questions/issues here...

1. Is your radio configured for 8.33 or 25kHz spacing?
2. 125.970 is not a valid frequency in either 8.33 or 25 kHz spacing.  Did you mean 125.975?
3. Looks like our com frequency preset list will accept 125.970*, though the radio will not tune it.  That's why you see the radio time out back to 125.695 (assuming your radio is in 8.33 kHz mode).

* That's a bug and we'll fix it (though it likely will not make it into 10.2.4.1).




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Steve Lindsley
Avidyne Engineering



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