Models AVR-3-PW-TEK1-B and AVR-3-PW-TEK3-B are optionally available with an additional output module that is physically suitable for use with the Tektronix CT-1 and CT- 2 ultra-fast (i.e., sub-nanosecond rise time) current probes. Aside from the internal clock, these instruments can also be triggered by a single-pulse pushbutton or an external TTL-level trigger input. When triggered externally the output pulse width can be set to track the input trigger pulse width (PWOUT = PWIN). A delay control and a sync output are provided for scope triggering. A gate input is also provided on models with the "-B" suffix. 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 backlit LCD displays the output amplitude, frequency, pulse width, and delay.
