On this high power RF circuit board, there are 0 pins.A RF type of Attenuator is provided by the Evaluation board.Using the HMC424 search parameter, you can discover variants of the RF Board.
EV1HMC424ALP3 Features
0 pins Attenuator Type
EV1HMC424ALP3 Applications
There are a lot of Analog Devices Inc. EV1HMC424ALP3 RF Boards applications.