| Common Electro-mechanical RF switch terminology... |
| Normally Open: | With no power applied, the common port is not connected to any of the output ports. |
| N.O. | Common abbreviation for Normally Open. |
| Failsafe: | With no power applied, the common port is connected to one of the output ports. |
| Reflective: | Switch ports are high impedance (open) when ports are turned off. |
| Absorptive: | Ports that are turned off are internally terminated with the proper impedance. (i.e. 50 Ohm impedance models are internally terminated with 50 Ohms.) |
| Self-terminating: | This term is used interchangeably with “absorptive”. Ports that are turned off are internally terminated with the proper impedance. (i.e. 50 Ohm impedance models are internally terminated with 50 Ohms.) |
| Hot Switching: | The switch changes state while a RF signal is still being applied to the switch. |
| Cold Switching: | No RF signal is applied to the RF switch while the RF switch is changes states. |
| Switching Speed: | Port turning ON = 50% TTL control to 90% of the RF signal. Port turning OFF = 50% TTL control to 10% of the RF signal. |
| Rise Time: | Port turning ON = 10% of the RF signal to 90% of the RF signal. |
| Fall Time: | Port turning OFF = 90% of the RF signal to 10% of the RF signal. |