Surf pi 1.2 timing variation with Battery voltage

[bklein]

I am seeing timing variation with battery voltage change due to the variation in amplitude of Q6 driving the first NAND gate. Not unique to me or my board version?

[bklein]

Q1 not Q6.

[Polymer]

I am seeing timing variation with battery voltage change due to the variation in amplitude of Q6 driving the first NAND gate. Not unique to me or my board version?

Not sure if this fits the bill, but here's an animated GIF I made a while ago of first delay & decay curve output of opamp Surf PI
with changing battery voltage. I would say this is not unique to you, except if your PPS is changing with battery voltage.

https://www.geotech1.com/forums/show...if-12v-to-9-5v

[bklein]

Ahhh, thanks. Yep.