Tektronix TDS3012C User Manual page 89

Trigger is set to Auto mode and minimum holdoff
Trigger is set to Edge type, DC coupling, and rising slope
B trigger is turned off
XY display format is turned off
Channel 1 is turned on and selected if no active channels are in use
If you push the Autoset button by accident, you can undo it with these
steps:
1. Push the Acquire Menu button.
2. Push the Autoset screen button and then push the Undo Autoset
screen button.
Waveform Intensity
The Waveform Intensity knob adjusts the intensity of the waveforms in
the display.
The term Digital Phosphor represents the way this control simulates the
intensity control of an analog oscilloscope. At maximum intensity, all
waveform points are displayed at full brightness. As you decrease the
intensity, you can see intensity grading in the waveforms. The brightest
parts of the waveform are the points most frequently acquired; the
dimmer parts represent less frequently acquired points. All points decay
in intensity over time unless the display persistence is set to infinite.
Use a medium intensity setting to get an analog-oscilloscope view
of time-varying signals and those containing modulation. Use the
maximum intensity setting to view the signals the way most digital
oscilloscopes display them.
You can turn on display persistence to slow or prevent the decay of the
waveform points. With persistence on, you can simulate the function of
an analog storage oscilloscope. (See page 75, Display.)
NOTE.
The waveform intensity may change when you change oscilloscope
acquisition modes or horizontal scale settings. Use the INTENSITY knob to
readjust waveform intensity.
TDS3000C Series Oscilloscope User Manual
Reference
61