Acquiring and Displaying Waveforms
TDS 684A, TDS 744A, & TDS 784A User Manual 3–7
Table 3–1: Autoset Defaults (Cont.)
Control Changed by Autoset to
Trigger Position Unchanged
Trigger Type Edge
Trigger Source Numerically lowest of the displayed channels (the selected
channel)
Trigger Level Midpoint of data for the trigger source
Trigger Slope Positive
Trigger Coupling DC
Trigger Holdoff Default Holdoff: Set equal to 5 horizontal divisions
Adjustable Holdoff: 250 ns
Selection in Mode and Holdoff menu determines whether the
default holdoff value or the adjustable hold value is used.
Vertical Scale As determined by the signal level
Vertical Coupling DC unless AC was previously set. AC remains unchanged.
Vertical Bandwidth Full
Vertical Offset 0 volts
Zoom Off
Do the following steps to reset the oscilloscope to its factory default settings:
1. Press the Save/Recall SETUP button to display the Setup menu (see Fig-
ure 3–3). Press the button directly below the Recall Factory Setup menu item.
2. Press the button to the right of the OK Confirm Factory Init side menu item.
3. Press the SET LEVEL TO 50% button (front panel) to be sure the
oscilloscope triggers on the input signal.
Selecting Channels
The TDS Oscilloscope applies all actions based on a specific waveform, such as
taking measurements or applying any changes it receives to the vertical control
settings, to the selected waveform. You can select a channel waveform, a math
waveform, or a reference waveform. This subsection describes how to select a
waveform and how you can turn the display of a waveform off.

To Reset the

Oscilloscope