The Tektronix Type 106 Square-Wave Generator is a compact, general-purpose square-wave generator. This instrument provides three square-wave outputs; a high-amplitude output (120 volts unterminated), and positive-going and negative-going fast-rise outputs (one nanosecond or less risetime into 50 ohms). Repetition rate of the output square waves is variable from 10 Hz to 1 MHz. A sync input feature is provided to synchronize the Type 106 with an external signal source. A trigger output allows the Type 106 to trigger external devices.