New Issue??

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  • Updated 3 years ago
Noticed something last night while on the radio (FLEX-6500, Windows 10, SmartSDR 1.5.1) not sure how long this has been going on to be honest.  Anyway having a QSO with a guy in Oregon, had VOX on, everytime I started to transmit, mainly when the inflection of my voice would cause the meter to peek up I would also hear a "ching" from the computer speakers like I was getting mail or something... it didn't seem to effect anything and the radio operated fine but it kept doing it... had to turn the computer speakers off to avoid the background noise..

I looked around and found no errors in windows, nothing...

Any idea's??
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David Warnberg

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Posted 3 years ago

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Doug Hall

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Could it be RF getting into a USB device and causing it to disappear and reappear as the computer enumerates it? Is the "ching" sound the same one you get when you plug in a USB device?
73,
Doug K4DSP
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David Warnberg

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No, it's the same sound as when I receive mail.... the USB plug in unplug is a different sound (plug in is one sound, unplug is a different sound)
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Doug Hall

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If you unplug your USB keyboard does it happen? I'm wondering if RF isn't making it appear that some particular key is being pressed. 
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David Warnberg

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Doug.. my keyboard is a logitech wireless keyboard as well as my mouse, only use USB to charge the batteries in it..  also the ching is the same ching as if you were to change the volume on speaker via the speaker icon in the lower right task bar... click it and the slider opens if you move slider up or down its the same chime...
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Mike KD2CJJ

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 I have the EXACT same issue!

I never noticed this until I hooked in a Yaesu MD100 Microphone.

What Mic are you using?
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David Warnberg

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I was using a Heil Pro Set Elite and VOX... I wonder if it has anything to do with DAX?  need to test again after turning off all DAX channels I found that there was one that was still red and streaming, although the DAX button in the P/CW window was off I wonder if that had anything to do with it...
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David Warnberg

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tried to test the DAX theory and now I can not get it to do it again.. going to have to pay attention and see if I can recreate to issue.
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David Warnberg

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BINGO.. found it... DAX.. if I turn on DAX streaming and hit the TX button in the DAX control panel, Select Channel 1 in the panadapter frequency window... then leave the DAX button off in the P/CW window on the right.. turn on VOX and speak it happens... in the DAX control panel turn off the stream and TX and select none in the DAX panadapter channel and it stops..

Hope this makes sense.
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Mike KD2CJJ

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I will try when I get home and report back.
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Norm - W7CK

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Might not be related but I have a Yamaha headset plugged into my computer.  When I have it too close to my speakers or computer.  I get a chirp about every 3-4 minutes.  Its faint and it has taken me a while to track down where it is coming from.  I've also had this same issue when having a Jabra wireless headset too close to my speakers or computer.

Lots of USB devices cause all sorts of issues too.  An example: I have a wireless keyboard and mouse that was working flawlessly for many months.  All of a sudden it started acting up.  Mouse would lock up and take several seconds to respond, keyboard was doing the same thing.  I'd start typing and nothing would happen for a couple seconds, then all of a sudden it would start working.  I tracked this down to an external disk drive that I had plugged into a USB 3 slot that was next to the bluetooth radio for the keyboard and mouse.  Took me a long time to figure that one out.

Good luck tracking this down.  Let us know when you figure it out.