P3 shows vertical green stripes on waterfall

[jsdroyster]

Hello all, I am trying to figure out why our P3 panadapter sometimes but not always shows a group of vertical green stripes that cover about 1/6 of the width of the screen.  These stripes are not related to RF frequency because if I switch bands they remain in the same location.  If I remain on one band and twirl the VFO knob, real radio signals move into the green stripes but the stripes themselves are immobile.  

Sometimes these are not there at all. Sometimes they are near the left of the screen, more often toward the middle.

Wayne gave some instructions for investigating this on PX3,but this is P3.
Any ideas?

Am I correct that these cannot be related to real RF interference due to the above facts? Wouldn't real RF be frequency-related? We do sometimes get RF interference that shows as periodic narrow lines on the waterfall, but these wide stripes are different.

THANKS!
Julie KT4JR

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Vic Rosenthal]

Various kinds of 'junk' on the screen have been reported to be caused by
coax jumpers with poor shield contact at one or both ends. Try another
cable if you haven't already.

On 20 Oct 2014 17:08, [hidden email] wrote:

> Hello all, I am trying to figure out why our P3 panadapter sometimes
> but not always shows a group of vertical green stripes that cover
> about 1/6 of the width of the screen.  These stripes are not related
> to RF frequency because if I switch bands they remain in the same
> location.  If I remain on one band and twirl the VFO knob, real radio
> signals move into the green stripes but the stripes themselves are
> immobile.
>
> Sometimes these are not there at all. Sometimes they are near the
> left of the screen, more often toward the middle.
>
> Wayne gave some instructions for investigating this on PX3,but this
> is P3. Any ideas?
>
> Am I correct that these cannot be related to real RF interference due
> to the above facts? Wouldn't real RF be frequency-related? We do
> sometimes get RF interference that shows as periodic narrow lines on
> the waterfall, but these wide stripes are different.
>
> THANKS! Julie KT4JR

--
73,
Vic, K2VCO/4X6GP
Rehovot, Israel
http://www.qsl.net/k2vco/
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Dominic Baines-3]

Sound like TFT screen h/w related.... I got a laptop that does something
similar with an external monitor IF the screen cable gets kinked or is
not connected properly. Check all the cables and connectors and vertical
lines or a somewhat 'green' image cleans up. I'd take a look at the P3
connections and cables.

72

Dom
M1KTA


On 20/10/14 15:08, [hidden email] wrote:

> Hello all, I am trying to figure out why our P3 panadapter sometimes but not always shows a group of vertical green stripes that cover about 1/6 of the width of the screen.  These stripes are not related to RF frequency because if I switch bands they remain in the same location.  If I remain on one band and twirl the VFO knob, real radio signals move into the green stripes but the stripes themselves are immobile.
>
> Sometimes these are not there at all. Sometimes they are near the left of the screen, more often toward the middle.
>
> Wayne gave some instructions for investigating this on PX3,but this is P3.
> Any ideas?
>
> Am I correct that these cannot be related to real RF interference due to the above facts? Wouldn't real RF be frequency-related? We do sometimes get RF interference that shows as periodic narrow lines on the waterfall, but these wide stripes are different.
>
> THANKS!
> Julie KT4JR
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Paul Saffren N6HZ]

Hi Julie,

It almost sounds like you have the span set very narrow and what you are seeing is the center frequency marker.   What happens when you adjust the span, does the green stripe change width?  If you would, please take a screen shot of the display using the P3 Utility and email it to me.  My email is pauls at elecraft....

Kind regards,

Paul n6hz