BK Precision 4001A Generates Sine, Triangle, and Square waveforms from 0.5 Hz to 4 MHzGenerates Ramp and ±Pulse waveforms from 0.5 Hz to 3.5 MHz20 Vpp output into open circuit (10 Vpp into 50O)Lin or Log Sweep Function 4 MHz Sweep/Function Generator The 4001A is a 4 MHz sweep function generator.