Tektronix TDS3000C Series User Manual page 73

Waveform Intensity
Acquire Menu
TDS3000C Series Oscilloscope User Manual
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 63, 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.
Push the Acquire Menu button to show the Acquire menu.
Bottom Side
Mode Sample
Peak Detect
Envelope N
Average N
Horizontal Fast Trigger (500
Resolution points)
Normal (10k points)
Reset Set to 0 s
Horizontal
Delay
Description
Use for normal acquisition.
Detects glitches and reduces the
possibility of aliasing.
Captures variations of a signal
over a period of time. (Adjust N
with the general purpose knob.)
Reduces random or uncorrelated
noise in the signal display. (Adjust
N with the general purpose knob.)
Acquires 500 point waveforms at a
fast repetition rate.
Acquires 10,000 point waveforms
with more horizontal detail.
Resets the horizontal delay time to
zero.
Reference
53