The 984-2 from Weinschel by Spectrum Control is a Digital Phase Shifter with Frequency 0 to 6000 MHz, Phase Step 2 Degrees, Power dBm 30 dBm, Insertion Loss 2.1 to 4.3 dB, Control Voltage 12 V. Tags: Module with Connectors, Programmable Phase Shifter. More details for 984-2 can be seen below.