The Function Generator Output Controls
Amplitude Control Knob:
- Before we connect the output of the Function
Generator to a circuit we must first be able to set the
Amplitude of the Output signal.
- This is done using the Amplitude Control Shown in
the diagram below:
- Now we see that the knob also has a -20dB
attenuation which is achieved by "pulling the knob
out" towards you.
Note You only
need to use the 20dB attenuation if you need to produce
very small signals (about 5mV).
- The other important point to remember is that the
Function Generator does not display any information about
signal amplitude so we must use the CRO
to view the amplitude when we set it to the required
The Output Terminal:
- The Output Terminal on the Function Generator is
a BNC Connection which can be used directly with a Coaxial Cable.
Or if 3mm Plugs
are required we will need to use an adaptor.
Don't Touch These:
- The marked controls and output terminals on the
diagram are not relevant to the First Year Course so the
easiest way to deal with them is to not touch them.
Duty knob should always be rotated
as far as possible in an anti clockwise direction to
ensure correct calibration.
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Revised: 15 September 2004