Reply to post:

Sometimes shining a light on a nuclear problem just makes things worse

ocelot

I can remember similar : on a project requiring extreme frequency stability and type approval, we installed a state-of-the-art Temperature Compensated Crystal Oscillator with a ceramic encapsulation.

We installed it on a PCB with a plastic case around it.

On test, it functioned perfectly until somebody turned on the light in the test chamber and it hopped frequency.

Turns out the plastic case and ceramic TCXO encapsulation was transparent to infrared light from an incandescent bulb.

POST COMMENT House rules

Not a member of The Register? Create a new account here.

  • Enter your comment

  • Add an icon

Anonymous cowards cannot choose their icon

SUBSCRIBE TO OUR WEEKLY TECH NEWSLETTER

Biting the hand that feeds IT © 1998–2020