HP / Keysight / Agilent 87130A Overview
You can also consider using 11713A attenuator/switch driver. The Agilent 11713A attenuator/switch driver provides GPIB or ''local'' front panel drive control for programmable attenuators and electromechanical switches. Concurrently drive up to two Agilent 8494/5/6/7, Agilent 84904/6/7K/L programmable attenuators and two electromechanical switches (Agilent 8761, 8762, or 8765 Series). For more information.