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  3. Best Practices - Defining and placing jumpers with arbitrary...

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Best Practices - Defining and placing jumpers with arbitrary distance ?

Ulf K
Ulf K over 1 year ago

Working on a double sided board where ground planes cannot be broken, I found it was neccessary to use jumpers on a few spots. But Cadence idea of a jumper and my own seems quite different.

The way I want to use a jumper is to be able to place the first via hole (pad), then move the mouse pointer to the next location and click to place the second half of the jumper there. Between these two points,

an imaginary wire (but visible on the assembly layer) would form, disobeying the otherwise yellow marker indicating an Incomplete connection when invoking the check-layout command.

I managed to create the jumper symbol and after tedious searching found the board property that had to be added but when I placed the jumper, the distance between the two vias

was (very much) fixed. The jumper also had a property "LOCKED" and I was unable to unlock it or move the second via to its intended location.

<F1> was of little help so I gave up.

It would be a pity if the only way to use jumpers would be to create them as 1-pin symbols and then spend a lot of time switching between schematic and layout creating them in the schematic and add then during

synchronization. The layout I am working on is not that complex but for future more complex RF designs I hope that there could be a better solution.

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  • jc teyssier
    +1 jc teyssier over 1 year ago

    One idea: create a inner layer and "route" jumpers in it. A via to access to inner layer, a straight trace, other via to get outside and you are done.

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  • John T
    +1 John T over 1 year ago in reply to jc teyssier

    Good idea! You could also output this copper layer to an assembly drawing or other artwork layer such as silkscreen so that your drawings output the locations at which these jumper wires must be assembled; and also so that no unwanted copper layer artworks are produced. 

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  • Ulf K
    0 Ulf K over 1 year ago

    Excellent ideas. Why did I not think of that myself ?

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  • John T
    0 John T over 1 year ago in reply to Ulf K

    It can be a lonely job and it's good to talk!

    These forums are definitely a good place to hash out ideas. Wishing you every success in your designs. 

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