NZFF

Hey guys, here's a curly one. I have found that when flying from some overseas airports such as Bowerman KHQM (USA), Langley Park YPLP (Perth) and Courcheval (France) I keep getting Morse Code signals, repeated every few seconds. I have tried all the things I can think of to shut it off, but it still keeps bleeping away....Bl#*dy annoying! Anybody got any answers?

Why do I keep thinking of Amelia? .

Hey sorry folk, I have put this in the wrong category...Dunno how to shift it

Galp wrote:

QUOTE (Galp @ Oct 11 2011,1:39 AM) <{POST_SNAPBACK}>

Hey guys, here's a curly one. I have found that when flying from some overseas airports such as Bowerman KHQM (USA), Langley Park YPLP (Perth) and Courcheval (France) I keep getting Morse Code signals, repeated every few seconds. I have tried all the things I can think of to shut it off, but it still keeps bleeping away....Bl#*dy annoying! Anybody got any answers?

One of the radio frequencies in use is tuned either to a VOR,ILS or ADf within radio range of the aircraft. If your panel has a speaker (channel in use) selection feature try turning off the switches allocated to the various VORs etc, or if that fails start changing the set frequencies until the morse stops

Clyde Williams
Levin

I recall you are picking up ADF / NDB signals , its all in your radio adjustment .

Thanks all you helpful people out there, have tried changing frequencies, but will go and do some more Nob twiddling when I get time

On the very top of the comm stack where you have the comm select switch, marker beacons etc. make sure all the switches labelled "ADF" "VOR" etc. are turned off.

Hi
I’ve got a theory on what might be causing this if you’ve tried all the normal avenues of approach:

It might be caused by something called proximity Radio Frequency Interference (RFI)

You are in the vicinity of a very powerful transmitter that you are not tuned to but the strength of the signal is enough to induce into the wires feeding the speaker / headset (i.e. your wires are acting like a mini antenna), causing the signal to be converted into audio when it hits the speaker / headset.

I don’t know if it’s an option for you but turning off all your radios and if you still receive the signal then as you move to a different geographical area and can’t reproduce the fault that would be my guess as to why that is happening.

I would suspect something in the HF band (3- 30 MHz) or MF Band (300 KHz- 3 MHz) simply due to power put out by those transmitters to be causing your problem.

Paul

All it will be is the audio ident feature - all radio navigation beacons have a morse signal associated with them so you can confirm that you're tuned to the correct beacon. It isn't interference, it's an intentional design feature! You'll notice on IFR charts VORs, NDBs, ILSs etc. always have a dot/dash morse code depicted underneath the radio frequency for the beacon.

Thank you everybody, problem solved. As you can tell I am not a real life pilot or I would have known what the signals were. I'm still on a steep learning curve and I bow to your superior knowledge! Your help is much appreciated.

Don't worry, it used to confuse me too when I first started in FS.

zkcav wrote:

QUOTE (zkcav @ Oct 6 2011,9:43 PM) <{POST_SNAPBACK}>

Hi
I've got a theory on what might be causing this if you've tried all the normal avenues of approach:

It might be caused by something called proximity Radio Frequency Interference (RFI)

You are in the vicinity of a very powerful transmitter that you are not tuned to but the strength of the signal is enough to induce into the wires feeding the speaker / headset (i.e. your wires are acting like a mini antenna), causing the signal to be converted into audio when it hits the speaker / headset.

I don't know if it's an option for you but turning off all your radios and if you still receive the signal then as you move to a different geographical area and can't reproduce the fault that would be my guess as to why that is happening.

I would suspect something in the HF band (3- 30 MHz) or MF Band (300 KHz- 3 MHz) simply due to power put out by those transmitters to be causing your problem.

Paul

In flightsim????????