On this high power RF circuit board, there are 0 pins.A RF type of Attenuator is provided by the Evaluation board.Using the HMC425 search parameter, you can discover variants of the RF Board.
EV1HMC425ALP3E Features
0 pins Attenuator Type
EV1HMC425ALP3E Applications
There are a lot of Analog Devices Inc. EV1HMC425ALP3E RF Boards applications.