The Wavetek Models 101 102 103 Function Generator and the 104 105 Voltage Controlled Generator are semi-precision sources of waveforms from servo to video frequencies. These units are extremely rugged, completely transistorized portable packages. Extremely clean and stable waveform signals from .008 cps to lMc in the 101 102 103 and from .0015 cps to lMc in the 104 105 make all 5 Generator versatile, general purpose pieces of equipment for the laboratory or the field. The Model 101 offers square waves and triangle waves. The Models 102 and 104 offer square, triangle, and sine waves. Models 101 102 and 104 are available with three power supply options: AC line power, dry cell battery, and rechargeable nickel cadmium batteries with built-in charger. Models 103 and 105 provide 30V p-p triangle, sine or square waves into a 600 ohm load. Models 103 and 105 are available in the AC power version only. The 104 and 105 have the capability of having the dial electrically changed by application of an external voltage without physical movement of the dial. As such, they are truly general purpose F.M. modulators. The wide frequency range of all five models makes them useful for low frequency applications such as servo and electro-mechanical systems, as well as audio or even video Amplifier work. Complex Oscilloscope may be completely checked out for proper operation in the field or on the repair bench with this single, versatile, and portable instrument. The VCG is capable of sweep testing I.F. Strips, low frequency Filter or F.M. of a servo. In addition, with proper inputs, it is possible to F.M. or sweep, a triangle, sine, or square wave. The very fast rise and fall times are ample for triggering high speed computer circuitry. Battery versions allow complete isolation from the power line and ground. This is particularly useful in any low level or wide band Amplifier development work. Models 101 102 103 have three outputs with independent amplitude controls: (1) 10V p-p max. square wave at 600 ohm output impedance; (2) IV p-p square wave at 50 ohm output impedance, rise and fall time less than 5 nanoseconds; (3) Model 101 triangle wave 5V p-p max., Model 102 triangle wave 5V p-p or 2V rms sine wave, Model 103 triangle, sine,or square waves 30V p-p max. into a 600 ohm load. Models 104 and 105 have two outputs with independent amplitude controls: (1) IV p-p square wave at 50 ohm output impedance; (2) Model 104 triangle wave 5V p-p max., sine wave at 2V rms, or square wave 10V p-p max. at 600 ohm output impedance; Model 105 triangle, sine or square wave 30V p-p max. into a 600 ohm load. The VCG input has an attenuator control which provides a minimum input impedance of 10K ohm. An input of 4.75 volts total will provide a 20:1 frequency range which is equivalent to full spread of the dial. The VCG input attenuator may be driven with any vQltage up to 100V without damage to the instrument.