Additional Features: Channels: 2 Bandwidth: 18-GHz on TDR/vertical channel Vertical accuracy: 0.4% Vertical resolution: 12 bits (15 with averaging) Maximum noise: < 1 mVrms The Keysight Agilent HP 54754A provides two 18-GHz channels that have built-in TDR step generators. The two channels may work in tandem to provide differential and common mode TDR stimulus/response or may be used independently. Either channel works as a normal oscilloscope vertical system when the TDR/TDT step generators are not operating.