Tektronix S51

This unit is a free-running tunnel-diode oscillator designed to provide stable sampling displays of sinewaves from 1GHz to 18GHz.

The unit has a front panel sync control that synchronizes the oscillator frequency to a subharmonic of the input signal.

The output of the unit is available at a front-panel trigger output connector and through a rear-output connector for internal triggering.

The output signal is a direct countdown of the input and permits triggering by a standard sapling time-base unit.