OD1402 - Lesson 1/Learning Event 1
selected by the COUPLING switch. Triggered sweep can be obtained
only over the amplitude range of the applied trigger signal. When
the level control is set outside the amplitude range, the sweep
will free run, at a rate selected by the TIME/DIV switch, to
provide a reference trace.
o Norm When pressed, sweep is initiated by the trigger signal
applied by the LEVEL and SLOPE controls, within the range selected
by the COUPLING switch. When the level control is set outside the
amplitude range, no trace will be displayed.
o Single Swp When pressed, only one sweep can be displayed
until the RESET switch is pressed.
o ResetReady When pressed while in the single sweep mode,
one sweep is displayed at the next trigger pulse.
Amplifier Coupling Switches. These four switches provide for the
selection of main trigger coupling. They are as follows:
o AC When pressed, DC components of signals are rejected and
AC signals below 30 hertz are attenuated. AC signals between 30
hertz and 50 megahertz are accepted intact.
o AC LF REJ When pressed, DC components of signals are
rejected and AC signals below 30 kilohertz are attenuated. AC
signals between 30 kilohertz and 50 megahertz are accepted.
o AC HP REJ When pressed, DC components and AC signals below
30 hertz and above 50 kilohertz range are attenuated. Signals
within the 30 hertz to 50 kilohertz range are accepted intact.
o DC When pressed, all signals from DC to 50 megahertz AC are
accepted.
Amplifier Source Switches. Provide for selection of the main
trigger source. They are as follows:
o INT When pressed, trigger signal is obtained from the
vertical amplifier.
o LINE When pressed, trigger signal is obtained from a sample
of the oscilloscope's input power frequency.
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