[arm-allstar] Weard Windows 10

Chris Viningre chrisviningre at gmail.com
Wed Aug 16 14:54:23 EST 2017 

Thanks Doug very helpful infomation.

On Aug 16, 2017 10:38 AM, Doug Crompton via arm-allstar <
arm-allstar at hamvoip.org> wrote:

> Another note on this. The answer is yes, a computer can put out different
> RF patterns based on what software it is running. An interesting sideline
> on this was a Z80 computer I had back in the late 1970's. I had a piece of
> SW that would play the Star Spangled Banner when an AM broadcast band radio
> was held near it. It did this just by altering timing loops within the SW.
>
> Like computers Computers HDMI monitors are also notoriously noisy with a
> radio at close distance. I see this on my handheld in the vicinity of my
> computer/monitor. Without PL the squelch would be opening all the time. I
> cannot remember an instance where it opened a PL enabled  receiver though.
> PL  detectors have a very narrow bandwidth and precise
> frequency. Another thing to consider when using PL is other transmitters at
> your QTH that are using the same PL. Intermod or mixing could cause the PL
> from another transmitter on another frequency or band to open the receiver.
>
> Again check that the PL on your 888 node receiver is really on.
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
>
> On Wed, Aug 16, 2017 at 8:58 AM, Doug Crompton <wa3dsp at gmail.com> wrote:
>
> > Chris,
> >
> >   With anything like this you have to test it. We can only make
> > assumptions based on what you say. Trying to recreate the scenario is the
> > best way to test. You can see if the node RX is open by listening on the
> > node radios receiver. It is the node receiver that is opening and keying
> > the COS. You can also bring up simpleusb-tune-menu from the main menu and
> > select the V option. This will show the cos-input which would be "keyed"
> in
> > the case of a valid incoming signal. Make sure when using the 888 the
> > cosfrom is set to usb. When no signal is present the cosfrom should show
> > "clear"
> >
> > While it is unlikely an external signal would open a PL'ed radio under
> the
> > right circumstances it could happen. Make sure the PL is really
> programmed
> > on. It sounds like that might possibly be the case. A non PL'ed radio
> will
> > key whether or not PL is coming in. Turn the PL off on the radio you are
> > keying your node with and see if it keys. The only way you would know is
> to
> > do further testing. The other issue when using the 888 is possible RF
> > getting into the FOB. I generally recommend an external antenna. A
> quarter
> > wave mag mount with 10 feet of coax and an SMA connector to the 888 is
> very
> > inexpensive on ebay,
> >
> > If it does turn out to be the computer distance will solve your problem
> > and really not that much distance. Maybe 5-10 feet.
> >
> >
> > *73 Doug*
> >
> > *WA3DSP*
> >
> > *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
> >
> >
> >
> > On Wed, Aug 16, 2017 at 5:20 AM, "Chris Viningre via arm-allstar" <
> > arm-allstar at hamvoip.org> wrote:
> >
> >> New information from my friend. Windows is on one hard drive and Linux
> is
> >> on another. Maybe the interference is coming from the drive that Windows
> >> is
> >> on?
> >>
> >> On Aug 16, 2017 2:57 AM, "Chris Viningre" <chrisviningre at gmail.com>
> >> wrote:
> >>
> >> > I'm still cofused. No radios keyed up or transmitting. One computer
> >> using
> >> > the same monitor and keyboard. Two partisans, one for Windows and the
> >> other
> >> > for Linux. The fob and node radio is one of my 8 nodes that I have
> >> > susessfully built running in a very high rf area around HF radios at
> >> full
> >> > legal limit power. Nodes are setup with outside or remote antenns. The
> >> only
> >> > time this node keys up abnormally is when the computer is running
> >> windows.
> >> > Not when it's running Linux. This is when I saw a signal on the
> >> receiving
> >> > only radios. I know this is weard.
> >> >
> >> > David, is it possible that windows is using something different or
> >> > differently than Linux that could cause a modulated signal?
> >> >
> >> > On Aug 16, 2017 1:57 AM, Terry Bethlehem via arm-allstar <
> >> > arm-allstar at hamvoip.org> wrote:
> >> >
> >> >> Yes, being very near to a pc, with a radio, can hammer the radio's
> >> front
> >> >> end. Some pcs are worse than others. Getting the radio away, as much
> as
> >> >> possible, helps a lot.
> >> >>
> >> >> On Aug 16, 2017 3:47 AM, David McGough via arm-allstar <
> >> >> arm-allstar at hamvoip.org> wrote:
> >> >>
> >> >> >
> >> >> > Hi,
> >> >> >
> >> >> >
> >> >> > Well, Win10 itself obviously won't generate RFI.  However, there
> are
> >> >> > possible situations where a PC can generate nasty RFI due to how
> the
> >> OS
> >> >> is
> >> >> > utilizing the hardware. One scenario is where you have a RFI noisy
> >> video
> >> >> > card in the PC.  I know of an installation many years ago where
> >> >> "upgraded"
> >> >> > computers partly knocked a municipal airport's communications off
> the
> >> >> air
> >> >> > due to crazy noise from the VGA video cards! As part of the
> upgrade,
> >> the
> >> >> > video cards got switched to a higher resolution, generating VHF
> spurs
> >> >> in a
> >> >> > very bad spot!
> >> >> >
> >> >> > So, check all the peripherals plugged into the PC as a first step.
> >> And,
> >> >> > check the PC power supply, etc.
> >> >> >
> >> >> >
> >> >> > 73, David KB4FXC
> >> >> >
> >> >> >
> >> >> >
> >> >> > On Wed, 16 Aug 2017, "Chris Viningre via arm-allstar" wrote:
> >> >> >
> >> >> > > We experienced a weird issue yesterday that I'm hoping someone
> >> could
> >> >> > share
> >> >> > > some light on. I was helping a friend set up Supermon on his
> node.I
> >> >> was
> >> >> > > showing him the features. When I was showing him lsnode and had
> him
> >> >> login
> >> >> > > on 27225 so he would be able to see the list of nodes.Thats when
> >> all
> >> >> hell
> >> >> > > broke loose. I heard a delay on login into the node on his
> radio. I
> >> >> then
> >> >> > > heard the dubble beep over and over. I knew something was going
> >> >> wrong. As
> >> >> > > he was shutting down the windows computer and I was going to
> >> shutdown
> >> >> the
> >> >> > > node radio and pi3, I saw a fluxurating signal on the operating
> >> radio
> >> >> as
> >> >> > > well as a green light receive signal on the node radio, a 888.
> When
> >> >> > windows
> >> >> > > was off there were no signal on either radio other then Doug
> seeing
> >> >> the
> >> >> > > problem was from us. Sorry Doug. My friend ran Linux on the same
> >> >> computer
> >> >> > > and it gave us no problems. My question is. Does anyone know of
> >> >> Windows
> >> >> > > emitting RFI on UHF that's capable of a 107.2 hz pl tone?
> >> >> > > _______________________________________________
> >> >> > >
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> >> >> > > arm-allstar at hamvoip.org
> >> >> > > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >> >> > >
> >> >> > > Visit the BBB and RPi2/3 web page - http://hamvoip.org
> >> >> > >
> >> >> >
> >> >> > _______________________________________________
> >> >> >
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> >> >> > arm-allstar at hamvoip.org
> >> >> > http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
> >> >> >
> >> >> > Visit the BBB and RPi2/3 web page - http://hamvoip.org
> >> >> >
> >> >> _______________________________________________
> >> >>
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> >> >>
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> >> >>
> >> >
> >> _______________________________________________
> >>
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> >>
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> >>
> >>
> >
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