These attenuators are bi-directional but are labeled with “input” and “output” because each port has a different maximum power rating. The port labeled “input” is rated for +24 dBm. The port labeled “output” is rated for +15 dBm. The attenuators can be controlled manually or remotely. Models are available with N or SMA female 50 Ohm coaxial RF connectors.
Download the available datasheet and drawing for more in-depth information.