The 5720A Multifunction Calibrators are five-function calibrators designed to address the most demanding electrical calibration workload. They source direct and alternating voltage and current and resistance. A wideband voltage option extends overall ac bandwidth to 10 Hz to 30 MHz to cover to RF voltmeters. Both are compatible with the 5725A Boost Amplifier, the 52120 Transconductance Amplifier, and 5205A/5215A amplifiers (now obsolete). All can be automated with MET/CAL Plus calibration software.