http://www.analog.com/media/en/technical-documentation/data-sheets/hmc307.pdf
https://www.sv1afn.com/adl5513.html

Already a long time a Digital Attenuator and a RF Power meter was laying in my junkbox doing nothing….. So I decided to put both modules together in a small case and added an Arduino Nano and OLED display to it.
The Attenuator is a 31 dB Digital step attenuator HMC307 and the Power meter is a design of SV1AFN. The Power meter is equipped with a ADL5513.

Inside view