It's quadrature hybrids (a microwave component)
No, I can't stick anything into the part. I have to calculate the time to prove that it reaches equilibrium in that 15 mins.
The block I preferred to was actually a quad hybrid. It was left in a thermal chamber from -55 deg to +85 deg thru thermal cycling for 15 minutes. I want to know if in that 15 minutes, the quad will reach its equilibrium. Can you please explain more? Thank you.