MON Function With Avidyne 550

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   AMX240 MON function does not work to monitor the standby frequency. Also does not work with 540 standby which is also in the panel. Does anyone with a 550 or 540 have this function working?

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vtairdoc Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Oct 2020 Location: Jericho VT Status: Offline Points: 4	Post Options Post Reply Quote vtairdoc Report Post Thanks(0) Quote Reply Topic: MON Function With Avidyne 550 Posted: 16 Oct 2020 at 6:26pm
	AMX240 MON function does not work to monitor the standby frequency. Also does not work with 540 standby which is also in the panel. Does anyone with a 550 or 540 have this function working?
	Don Majercik

dmtidler Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 12 Feb 2016 Location: USA Status: Offline Points: 619	Post Options Post Reply Quote dmtidler Report Post Thanks(0) Quote Reply Posted: 16 Oct 2020 at 8:06pm
	Yes, MON has worked flawlessly for years with my IFD540 and AXP240. The first item I would check is the Standby Com volume level on the AUX - AUDIO tab. Also, keep in mind that MON only monitors the first standby com regardless of how many standby coms you have displayed and regardless of which standby com is highlighted for swapping with the active com.

oskrypuch Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Nov 2012 Location: CYFD Status: Offline Points: 3061	Post Options Post Reply Quote oskrypuch Report Post Thanks(0) Quote Reply Posted: 16 Oct 2020 at 10:53pm
	Did it ever work? It was wired in, right? * Orest

vtairdoc Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Oct 2020 Location: Jericho VT Status: Offline Points: 4	Post Options Post Reply Quote vtairdoc Report Post Thanks(0) Quote Reply Posted: 17 Oct 2020 at 11:43pm
	system has been in the aircraft for a few years and I tried the Mon function for the first time a week ago. I have only one standby freq displayed. I will check the volume level for the standby com. I didn't realize there was a control for the standby volume. Is there specific wiring needed for this to work?
	Don Majercik

oskrypuch Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Nov 2012 Location: CYFD Status: Offline Points: 3061	Post Options Post Reply Quote oskrypuch Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 12:26am
	Yes, there is specific wiring. You need to run a wire pair from the IFD COM standby OUT, to a switched input on your audio panel. If that was not done at install, then it obviously won't work. Of course, it can be added, say next time they are behind the panel. * Orest Edited by oskrypuch - 18 Oct 2020 at 12:28am

vtairdoc Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 16 Oct 2020 Location: Jericho VT Status: Offline Points: 4	Post Options Post Reply Quote vtairdoc Report Post Thanks(0) Quote Reply Posted: 18 Oct 2020 at 1:18pm
	I checked th ifds today and the volume setting for the standby freq's is in the mid range. As Orest suggests the wiring must not have been done at install. I will need to discuss this with my avionics shop.
	Don Majercik