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DUAL FUNCTION GENERATOR


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Manufacturer: Pasco Scientific
Model: 9301
Cost: $350 (1975)


Description:


2 signal generators, each with frequencies from 1 Hz to 100 kHz with sine, triangular, square, pulse and sawtooth waves available. Each channel is adjustable from 0 to (greater than) 1 volt peak to peak amplitude, and may be phase shifted by 180°. There is a summing amplifier which allows the outputs of the 2 generators to be added. A microphone input and external high level input may be added to the summing amplifier. In addition, generator 2 may be modulated by the output of generator 1 in 4 modes: Amplitude Modulation, Frequency Modulation, Double Side Band, and Gate. Generator 1 may be similarly modulated by any external source.



Specifications

Each generator's frequency dial is accurate to within 5%. The output of each generator is independent of frequency to within 0.1 dB from 20 Hz to 20 kHz.

Frequency Range1 Hz - 100 kHz
Output Voltage(greater than) 1 volt peak-to-peak
Waveshapessine, triangle, square, sawtooth,
20% duty cycle pulse.
External InputsMicrophone
High Level to Summing Amplifier
High Level to Modulator for Generator 1
High Level OutputsTriggers from each generator
outputs from each generator
microphone preamp
summing amplifier.

Two low quality (2 watts at 5% distortion) 8 ohm amplifiers exist for driving loudspeakers.



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Operating Instructions
  1. Make sure all GAIN and AMPLITUDE controls are off (fully counter clockwise).
  2. Turn on the unit. The power switch is located in the lower left hand corner.
  3. Select the modes of operation desired. The signal flow is indicated with arrows on the face plate.
  4. Connect the "10k" outputs to the desired components; oscilloscope, external amplifier, etc.
  5. Adjust the generators for the desired frequency. The frequency range switch refers to the frequency, in Hz, of the generator when the dial is fully clockwise.
  6. Adjust the amplitude of the desired generator.

NOTE: the functions of this component are explored in detail in the experiment: "Addition of Waves I: 2 Waves"



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keywords: sawtooth wave generator, triangle wave generator, square wave generator, frequency generator, sine wave generator, signal generator, electrical source.

Document created June 1996. Original author: Jeremy Bailin and Jaime Espinoza.
Last updated 08/01/96. Revised by David Harrison and Jaime Espinoza.