The PM 5715 generates high-quality pulses at a repetition frequency of 1 Hz to 50MHz and rise and falltime being independently and continuously variable between 6ns and 0.5s. All of the other important pulse parameters, such as pulse delay, duration and amplitude, are also variable within a wide range. Normal or inverted pulses with positive or negative polarity, double pulse generation and variable d.c. offset are other versatility parameters provided by the PM 5715. The variable transition time combined with a second TTL matched output make the PM 5715 particularly useful when testing or simulating TTL circuits. Square wave generation and pulse shaping facility extend the range of useful applications.