[Elecraft] P3: Vertical Lines for display question

[Dave Cole]

As always Jim, you have something that helps!  THANKS...  Let me absorb 
your presentation on using the P3.  You are using it for almost exactly 
what I am planning...

I have been hoping to avoid adding vertical grid lines, but maybe it is 
time to start that using GIMP...  If only the P3 did that...

Thanks again Jim!

73s and thanks,
Dave
NK7Z
http://www.nk7z.net

On 09/16/2017 11:40 AM, Jim Brown wrote:
> Hi Dave,
> 
> Take a look at the screen grabs in 
> http://k9yc.com/P3_Spectrum_Measurements.pdf
> 
> These were done two ways. The ones without the SVGA were saved from the 
> P3 Utility. Those with the SVGA were saved to a USB thumb drive via the 
> SVGA menu.  These data were all obtained by accumulating peaks on the 
> signal. Before saving the screens, I used the cursor to points along the 
> curve on both sides to document the frequencies and levels and wrote 
> them down. Then I saved the screens.
> 
> Note also that there are small calibrations along the top of the screen, 
> and that these are sub-divisions of the scan width. Using graphics 
> editing software, it's possible (not easy) to turn the screen grab 
> negative so that the background is white and the traces are some color 
> dark enough to print. When using these calibrations, it helps to set the 
> scan width to a the smallest value that contains all the data and that 
> makes these calibrations a convenient scale. When printing the graphics, 
> it helps to scale the image so that the spacing between calibrations is 
> the same or close to whatever ruler is available. Also, decimal rulers 
> help.
> 
> The edited graphics can be printed, vertical lines drawn, and points 
> picked off with an architect's or engineer's scale. I've done this with 
> some P3 data, and also ARRL Lab data for which data files were not 
> available. Older engineers (those of us trained 50 or more years ago) 
> learned these techniques (and a lot more) in our freshman year.  Data 
> for Fig 2 in k9yc.com/TXNoise.pdf was obtained by applying these methods 
> to the plots on Pages 1 and 2.
> 
> If this sounds like a lot of work, you're right. Which gives you an idea 
> how much time I put into producing those reports. :)
> 
> 73, Jim K9YC
> 
> On 9/16/2017 10:43 AM, Dave Cole wrote:
>> I am looking to impress a grid structure on the P3, as opposed to some 
>> lines I need to move.  I want to be able to document exactly how wide 
>> something is signal wise, by taking a snap of the signal, then looking 
>> at it with my computer. 
> 
> 
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