[arm-allstar] Weard Windows 10

Wed Aug 16 11:38:23 EST 2017

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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>> >> > >
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>> >> > >
>> >> >
>> >> > _______________________________________________
>> >> >
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>> >> >
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>> >> >
>> >> _______________________________________________
>> >>
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>> >>
>> >
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>>
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>>
>