Guard Terminal Feature (See section 4.3 for the procedure)
If the GS200 and the DUT are far apart or if the GS200 shares its power source with
electric motors, common mode noise may be superimposed on the power source signal
supplied to the DUT. If common mode noise is superimposed on the signal between the
GS200’s Hi and Lo terminals, the noise current enters the internal source circuit from
the output terminals and changes the generated signal. To reduce this effect, a shield
for the source circuit is connected to the guard terminal of the GS200. If you connect the
noise source to the guard terminal, the noise current passes through the guard and is
grounded, bypassing the internal source circuit. This reduces the amount of noise that
enters the circuit from the connected power source. Use the guard terminal when a large
amount of common mode noise is superimposed on the power source signal.
2.3 Source
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