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University of Saskatchewan
Electrical Engineering Laboratory Equipment Manual
The Instek FG-8016G is a low cost, low quality signal generator. For most
laboratories it functions quite well, but it has performed much less than adequately in a
couple of special situations. Its frequency range is 0.2 Hz – 2.1 MHz. The output is
taken from the OUTPUT connector, but as with the other signal generators already
discussed, both a low and a high output mode are possible, with 20 dB difference in
signal level between the two.
The output level is adjusted with the AMPL knob; when it is pulled out, the output
level is decreased by 20 dB. The frequency is adjusted with the large knob beneath the
display in conjunction with the frequency range pushbuttons. If a dc offset is required,
pull the OFFSET knob; rotating it now adjusts the offset (positive and negative offsets
are possible).
If you require a TTL compatible square wave no voltage or offset adjustments are
necessary—just take the output from the OUTPUT TTL/CMOS connector. If some
further adjustment to the output voltage level from this connector is necessary, pull the
TTL knob. It now serves as a voltage level adjust for the output signal on that
connector.
If you are generating sine waves only, the DUTY cycle control knob should be
rotated fully counterclockwise to the CAL position. If it is not set to the CAL position, the
output will be distorted. If you wish to create a square wave with a duty cycle other than
50%, then the DUTY knob, in conjunction with the frequency adjustment controls, will
yield your desired waveform. When pushed in, the DUTY knob will yield waveforms
with duty cycles > 50%. Pull the DUTY knob to enter the INV (invert) mode if duty
cycles < 50% are desired. If you are generating a triangular wave, altering the duty
cycle will create a sawtooth (or ramp) waveform. The duty cycle of the output from the
TTL/CMOS connector is also controlled by the DUTY knob.
The LED display on the front panel will display the frequency of the waveform the
sig gen is creating, but only if the two INPUT COUNTER pushbuttons are out.
Wavetek Model 180 Sweep/Function Generator