kicad-developers team mailing list archive

[Andrew Zonenberg <azonenberg@xxxxxxxxxxxxxxx>]

Hi,

Try to skew-match the pair in the attached file.

On 14/03/17 16:06, Tomasz Wlostowski wrote:
> On 14.03.2017 19:20, Andrew Zonenberg wrote:
>> This one is probably for Orson or Tom...
>>
>>
>> Tested with latest code from git (on Debian Jessie), but I also had the
>> issue with my old version (a few weeks old, forgot to write down the
>> exact hash).
>>
>> Steps to reproduce:
>> * Create schematic that has a differential pair in it
>> * Set differential pair design rules to 0.21mm trace, 0.15mm space
>> * Route differential pair in such a way that there's skew between the halves
>> * Try to skew-match
>>
>> Expected result: overlay appears, says "too short", mouse motion adds
>> meanders
>>
>> Actual result: Overlay appears, says "too short", no meanders are created
>>
>> I've had the issue with other dimensions as well, it appears that having
>> trace width greater than space is necessary but not sufficient to cause
>> the problem.
> 
> Hi Andrew,
> 
> Could you send a sample PCB file with a diff pair that causes the issue
> (and tell us what target length we should use?)
> 
> Cheers,
> Tom
> 
>>
>>
>>
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> 

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