| OC |
open
circuit |
Opposite
of short circuit. |
| OCXO |
oven
controlled crystal oscillator |
|
| OD |
outside
diameter |
The
outside dimension of a cylinder. |
|
Oe
|
Oersteds
|
Unit of magnetic intensity,
named after a dead Klingon.
|
| OFHC |
oxegen-free
high-conductivity (copper) |
The
ideal material for low loss waveguide. |
| OMT |
ortho-mode
transducer |
|
| OTOI |
output
third order intercept |
|