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Phil_anthropist
Newbie Joined: 15 Mar 2014 Location: Massachusetts Status: Offline Points: 17 |
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Posted: 17 Feb 2024 at 5:54pm |
Do others get No Position messages a lot?
I have always gotten them and although the 10.3.1.2 software seems to help, I still see them. In this picture, it's happening on the ground though they happen in the air also. I've never had one happen on an approach, but I suppose one day it will. Posts on this topic seem to be mostly around 2015, ex.: http://forums.avidyne.com/gps-failure-even-with-10-1_topic760_post8229.html?KW=gps+fault+no+position#8229 with discussions of ferrite beads etc. Since this 540 is from before then, I wonder if it might suffer from whatever was improved around that time. This tag says REV 02. Does anyone know what hardware rev is current? Regards, PA |
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rpostmo
Senior Member Joined: 20 Jul 2015 Location: North Dakota Status: Offline Points: 157 |
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I installed my 540 in 2015. I've never seen that message.
Bob
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rolfe_tessem
Senior Member Joined: 06 Jan 2012 Location: Massachusetts Status: Offline Points: 185 |
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Likewise, I have one of the earliest units in the field and have never seen this. It seems as though most issues like this boil down to the antenna or feedline. Rolfe
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Phil_anthropist
Newbie Joined: 15 Mar 2014 Location: Massachusetts Status: Offline Points: 17 |
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Phil_anthropist
Newbie Joined: 15 Mar 2014 Location: Massachusetts Status: Offline Points: 17 |
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Thanks much for the reports!
Hmm. I've tried different variations on the antenna and coax. Do either of you know what hardware revision you have, or the manufacture date? Mine I think is week 46 of 2014 from MFG code in the upper picture. Does anyone know how to interpret the logs? Ex. what is TrackingState? CarrierPhaseNoise? |
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eallevato
Groupie Joined: 04 Apr 2018 Location: Northridge, CA Status: Offline Points: 69 |
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Questions:
1) What kind of plane? 2) What is your #2 COM? 3) When you get a “No Position” message in the air, did you happen to notice if it was after transmitting on 121.xx or 131.xx xx MHz on your #2 COM? 4) Do you have a 121.5 MHz ELT? 5) If you have a 121.5 ELT, how far apart is the ELT antenna from the COM antennae? Gene
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Gene
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Phil_anthropist
Newbie Joined: 15 Mar 2014 Location: Massachusetts Status: Offline Points: 17 |
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Hi Gene, 1 PA-24 single Comanche 2 Narco 12D+ digital 3 #2 com is never used for transmitting 4 yes, still have a 121.5 ELT 5 about 6 feet PA
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