marcoreps

KX Vref all packed up and ready for travelling

Added 2018-09-15 20:33:47 +0000 UTC

I am using a generic Hammond al enclosure and a sumpremely shielded Displayport cable. There are special RF absorbing materials which might be nicer than white packaging foam https://www.lairdtech.com/product-categories/rfmicrowave-absorbers-dielectrics

There are 2 completely separate circuits on that board: LTZ1000 based voltage reference and few completely isolated temperature sensors which I am going to connect to those unshielded, untwisted cables.

Thanks to Jason's tip about the common mode ferrite I am getting a lot less noise than before, but according to my less than optimal measurements, still more than promised in the LTZ datasheet.

We'll see tomorrow if the (still) superior test gear of the Physikalisch-Technische Bundesanstalt at Maker Faire Hannover will yield the same noisy result.

I am not quite sure if I should bring the new Schlumberger Solartron 7081 too. It agrees almost perfectly with Keithley 2001, so a hasty cal between ham radios and tesla coils might be worse than what the meter is current set to. Also I don't have test leads yet, so that'll be a bit of an amateurish cal at the very best :)

Any more Maker Faire Hannover attendees? Join the Discord server, I am connected via phone!