For wider pulse width applications, the AVIR-3 family offers 10 to 200 ns pulse widths with 2 ns rise times. The AVIR-4 family essentially combines the AVIR-2 and AVIR-3 technologies to offer pulse widths from 4 to 200 ns, in two ranges (4 to 10 ns, and 10 to 200 ns). The AVIR-4D-B offers wider pulses, to 1 us. All models include an internal oscillator variable up to 50 kHz (AVIR-1 family) or 20 kHz (all other families) using the front-panel controls. A delay control and a sync output are provided for scope triggering. All models can also be triggered externally with a TTL-level pulse. Positive, negative, and dual polarity models can be provided. The polarity in dual-polarity units is controlled by a front-panel switch.
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