AW:Re: [sdiy] Substitute ...

[jhaible at debitel.net]

>> What is the maximum permissible crosstalk level (in dB)?
>
>Obviously low, but reasonable at 10 khz, it depends on what
>type of signal one are using and to where it goes. According
>to the old testament of JH, the divine god of Gillemetti matrixes,
>matrix'es do not have particularly god crosstalk figures.

Well, I care more for the real Old Testament (and even more for the New
Testament)than I do for Matrices, or for DIY in general. :)

But speaking of crosstalk: simply measure the capacitance of typical
configurations (adjacent rows or columns, rw-column at a crosspoint), and then
make a small Spice simulation with a certain resistor value.
Then it's clear that you can minimize crosstalk by choosing a low impedance.
(That's why EMS used 2k7 I think.)

JH.



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