Required for operation of Agilent 1141A Differential Probe. Independently powers the Agilent 1144A 800 MHz Active Probe and the Agilent 1145A 750 MHz Active Probe for SMD. The Agilent 1142A Probe Control and Power Module can power and control the 1141A Differential Probe, 1144A 800 MHz Active Probe and the 1145A 750 MHz Active Probe for SMD