The Keysight (formerly Agilent) 1141A is a 1X FET differential probe with 200 MHz bandwidth and 3000:1 CMRR (Common Mode Rejection Ratio) at 1 MHz. The probe has an input resistance of 1 MOhm and low input capacitance of 7 pF, to minimize circuit loading. The Keysight (formerly Agilent) 1141A 200 MHz Differential Probe must be used with the Keysight (formerly Agilent) 1142A Probe Control and Power Module. It can be connected to any instrument with 50 ohm inputs. An external 50 ohm termination can also be used with high impedance inputs.