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Speedval Kit Daughter Board MMCX measurement

Antma
Antma Contributor Level 1
edited May 2024 in General

Dear community,

I am studying the speedval kit daughter board's datasheet (e.g. MOD-PWR-MM-...J SPEEDVAL KIT™ TO-263-7 POWER DAUGHTER CARD USER GUIDE). I see that the MMCX connector that measures the Ids is connected in reverse. Meaning that the "positive" signal that is measured is the V_shunt-, and the reference (shield) of the mmcx is the V_shunt+. Is there a specific reason for that?

Screenshot 2024-04-22 192350.png


Moreover, I see on the respective video showcasing the functionality of this kit, than an adaptor from mmcx to bnc is used. Is there a specific reason besides the package of the mmcx that we prefer to use an adaptor that leads to a bnc anyway?


Thank you in advance!

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