The Model 3020 Sweep/Function Generator is the most versatile signal source ever offered by B & K-PRECISION. It combines the operation of four instruments into one — function generator, pulse generator, sweep generator, and tone burst generator. With this versatility, it has a vast number of applications in both analog and digital electronics in the engineering, manufacturing, servicing, educational, and hobbyist fields. The heart of the function generator is a VCG (voltage-controlled generator) that produces precision sine, square, or triangle waves over the .02 Hz to 2 MHz range. This encompasses subaudible, audio, ultrasonic, and RF applications. A continuously variable DC offset allows the output to be injected directly into circuits at the correct bias level. Variable symmetry of the output waveforms converts the instrument to a pulse generator capable of generating rectangular waves or pulses, ramp or sawtooth waves, and slewed sine waves of variable duty cycle. All waveforms can be inverted. The sweep generator offers linear or log sweep with variable sweep rate and sweep width up to 1000:1 frequency change. This allows one continuous sweep to cover the entire 20 to 20,000 Hz audio band. The frequency response of any active or passive device up to 2 MHz can be determined. The tone burst generator chops the output into alternate on and off periods. Both the repetition rate and on/off duty cycle are variable. Tone burst testing is essential for speaker acoustics measurement, modulation limiter attack time measurement, tone burst decoder alignment, and many other applications. The tone burst is in integral half cycles of the frequency being gated. This allows synchronization of the waveform for oscilloscope viewing and eliminates transients and frequency components not harmonically related to the frequency being gated. In addition to all the above features, an external signal may be applied to achieve amplitude modulation. Percentage of modulation is fully adjustable; also, the carrier can be suppressed to obtain a double-sideband, suppressed carrier signal. Most functions can be generated simultaneously; thus it is possible to test effects of simultaneous AM and FM modulation, or to sweep during tone bursts. Further versatility is possible with external tone burst gating and external control of the VCG for operation such as programmable frequency control, FSK, and sweeping or FM’ing to an external control signal. A fixed level TTL output is available in addition to the adjustable amplitude 50-ohm output, which can be varied from 20 millivolts to 20 volts peak-to-peak open circuit (10 millivolts to 10 volts peak-to-peak into 50 ohms). A sample of the generator control voltage (GCV) is also available for external use, such as horizontal sweep of an oscilloscope during sweep alignment or frequency response measurements.