The GND position provides a ground reference at the input of
the appropriate vertical channel without the need to externally
ground the probe. The signal applied to the probe is internally
disconnected from the input circuit and connected to ground through
a one-megohm resistor. The input to the vertical amplifier is held at
ground potential.
The DC coupling position can be used for most applications.
This position allows measurements of the DC component of a
signal, and must be used to display signals below about 10 hertz as
they will be attenuated in the AC position.
15
212 Operators Handbook
