The AVG series of high voltage impulse generators includes units providing pulse widths (measured at the 20% rise time point) in the range of 1 to 10 ns, amplitudes from 120V to 1 kV, and pulse repetition rates to 50 kHz. All models require a 50 Ohm load. The AVG-1 family generates < 4 ns impulses at repetition rates to 50 kHz. For repetition rates below 10 kHz, the maximum amplitude is 240V. The maximum amplitude at 10-50 kHz falls to 180V.