The AVR-G series is specifically designed for gating and beam blanking applications requiring amplitudes up to ± 250 Volts, pulse widths from 100 ns to 0.5 sec and duty cycles as high as 50%.
This series is designed to drive high impedance loads such as microchannel plates, grids and beam deflection plates. It should be noted that the versatile AVR-G technology can be readily adapted to provide a wide variety of other waveforms (e.g., higher voltages, dual outputs, alternating polarity, etc).
Model AVR-G1-B provides up to 250 Volts out, pulse widths from 100 ns to 1 ms, PRF to 1 kHz and duty cycles to 20%. An option is available that allows the inter-pulse baseline to be offset by 0 to ± 50 Volts by applying the required DC offset to a rear-panel solder terminal. A switchable output polarity option is also
available. Another option allows the polarity to invert with each pulse, to generate a bipolar waveform.
Model AVR-G2-B provides an output that is basically the complement of the AVR-G1-B output - that is, the output potential is high (and variable) during the inter-pulse interval. The amplitude during this interval is variable from 0 to 250 Volts (via a one-turn control) while the amplitude during the pulse is fixed at 0 Volts. However, the OS option allows the voltage during the pulse to be
varied from 0 to ± 50 Volts.
For all models, the pulse repetition frequency is variable using the internal clock oscillator. A delay control and a sync output are provided for scope triggering purposes. The units can also be triggered externally using a TTL-level pulse. A manual push button is provided for one shot operation.
All models with the “-B” suffix include a complete computer control interface. This
provides GPIB and RS-232 computer-control, as well as front panel keypad and adjust knob control of the output pulse parameters. A large back-lit LCD displays the output amplitude, polarity, frequency, pulse width or duty cycle as appropriate, and delay.