User:Jeremyb/Sandbox

Links

 * m:Help:Displaying a formula
 * w:Wikipedia:How to write a Wikipedia article on Mathematics
 * w:Wikipedia talk:WikiProject Mathematics/Proofs

prose that should go in module source rather than in the image

 * these images cannot be replaced entirely


 * Image:Phased pattern.gif
 * Image:Single voice channel.gif
 * Image:12 channel group.gif
 * Image:Broadside wavefront.gif &mdash; maybe
 * Image:NRZ spectrum.gif &mdash; has a footnote. figure out what it is and if it needs to be hooked up

the only content is tables of text

 * Image:Antenna gain.gif &mdash; ✅; could use someone to look it over to be doubly sure I didn't goof. [ diff]
 * Image:Analog carrier systems.gif
 * Image:2B1Q coding.gif
 * Image:3B4B coding.gif
 * Image:2B1Q coding.gif
 * Image:HDB3 substitutions.gif
 * Image:European TDM.gif
 * Image:S bits.gif &mdash; done at but it doesn't look great.  would be better if the columns were uniform width like in the image.
 * Image:ESF.gif
 * Image:North american TDM.gif
 * Image:Digital transmission systems.gif &mdash; has a bunch of footnotes in image itself. figure out what they are and if they need to be hooked up as real notes.
 * Image:BRA comparison.gif
 * Image:Line code table.gif

mathematical formulas and equations

 * these images might contain interspersed prose as well


 * Image:Endfire equations.gif &mdash; see first stab at
 * Image:Broadside equations.gif
 * Image:Array factor.gif &mdash; looks like there's a little bit that can't be replaced at the top
 * Image:Utilization.gif
 * Image:LPDA formulas.gif

other

 * Image:Fixed assgnment access.gif &mdash; probably best to split this up into 3 images. Maybe the 2 on the left can be SVG.  The label for each one should be pulled out into the module source.  IDK about the axis labels.
 * Image:Queue length.gif another one with axis labels... have to look into possibilities and how en.wp / commons handles this (it's much better to have a single image for all languages than to have to generate a new image for each lang that uses it. speaking of which... see if commons has similar content and whether there's demand for this kind of stuff elsewhere.

triage queue

 * Image:B3ZS example.gif
 * Image:B3ZS substitutions.gif
 * Image:B8ZS substitutions.gif
 * Image:B6ZS example.gif
 * Image:B6ZS substitutions.gif

Image:Endfire equations.gif


\begin{align} \varphi & = \frac{2\pi}{\lambda}s\cos(\theta)+\alpha \\ 0      & = \frac{2\pi}{\lambda}s\cos(0)+\alpha \\ \alpha & = -\frac{2\pi}{\lambda}s \\ \end{align} $$

Therefore the array factor for an end-fire array is:



AF=\left | \frac{\sin(\frac{n\varphi}{2})}{\sqrt{n}\sin(\frac{\varphi}{2})}\right \vert $$ where $$ \varphi = \frac{2\pi}{\lambda}s(\cos(\theta)-1) $$


 * generally $$s = \frac{\lambda}{4}$$ therefore $$\varphi = \frac{\pi}{2}(\cos(\theta)-1)$$