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4 Mhz Function Generator


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Manufacturer: Wavetek
Model: 182A


Description


Precision source of sine, triangle and square waveforms plus dc voltage. Variation of 0.004 Hz to 4 Mhz and can be externally modulated or swept over a 1000:1 range. Output can be continuous or the generator could be triggered or gated from an external signal or a front panel switch. Amplitude of the waveforms is variable from 10V peak-to-peak into 50 Ohms down to 30 mV p-p. DC reference of the waveform can be offset positively or negatively.



Specifications
Operational ModesContinuous, Triggered or Gated
Frequency Range 0.004 Hz to 4 MHz (7 decade ranges)
X 1 (0.004 Hz to 4 Hz)
X 10 (0.04 Hz to 40 Hz)
X 100 (0.4 Hz to 400 Hz)
X 1 K (4 Hz to 4 kHz)
X 10 K (40 Hz to 40 kHz)
X 100 K (400 Hz to 400 kHz)
X 1 M (4 kHz to 4 MHz)
Trigger and Gate
Input TTL compatible levels
Pulse Width 50 ns minimum
Repetition Rate 4 MHz maximum
Frequency Precision
Dial Accuracy± 5% of full scale.
Waveform Characteristics
Sine distortion< 0.5% on X1K and X 10K ranges
1% on X 1, X 10, X 100 and X100K ranges.
All harmonics 25 dB below fundamental on X 1M range.
Triangle Linearity< 99% to 200 kHz.
Square Wave Rise and Fall Time At HI output, < 50 ns for 10V p-p output into 50 Ohm termination.

Time Symmetry: Square wave variation from 0.2 to 4.0 on dial < ± 1% to 100 kHz; ± 5% to 4 MHz.

Amplitude Precision: Sine variation with frequency < ± 0.2 dB on all ranges through X 100K; ± 1.0 dB to 4 MHz.



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Operating Instructions
  1. Manual Function Generator Operation
    1. Connect circuit to 50 Ohm OUT (HI or LO)
    2. Set FREQUENCY MULTIPLIER to desired frequency range
    3. Adjust FREQUENCY DIAL to desired frequency with selected range.
    4. Select desired waveform with FUNCTION BUTTONS.
    5. Set DC OFFSET as desired. Limit waveform amplitude to prevent clipping.
    6. Select desired AMPLITUDE.
  2. Voltage Controlled Function Generator Operation
    1. Operation is similar to manual control but frequency is controlled by an external voltage connected to VCG IN.
    2. For frequency control with positive DC inputs at VCG IN, set the dial for a lower frequency limit.
    3. For frequency control with negative DC inputs at VCG IN, set the dial for an upper frequency limit.
    4. For modulation with an ZZC input at VCG IN, set the dial at the desired center frequency. Do not exceed the maximum dial range of the selected frequency range.



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

Document created June 13, 1996. Original author: Jeremy Bailin and Jaime Espinoza.