Reference
Waveform Inten
sity
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
gradingint
he 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 c hange when you change oscilloscope
acquisition modes or horizontal scale settings. Use the INTENSITY knob to
readjust waveform intensity.
Acquire Menu
Push the Acquire Menu button to show the Acquire menu.
Bot
tom
Sid
e
Des
cription
Sa
mple
Us
e for normal acquisition.
Peak Detect Detects glitches and reduces the
po
ssibility of aliasing.
Envelope N
C
aptures variations of a signal
over a period of time. (Adjust N
with the general purpose knob.)
Mode
Average N Reduces random or uncorrelated
noise in the signal display. (Adjust
N with the general purpose knob.)
Fast Trigger (500
points)
Acquires 500 point waveforms at a
fast repetition rate.
Horizontal
Resolution
Normal (10k points) Acquires 10,000 point waveforms
with more horizontal detail.
Reset
Horizontal
Delay
Set to 0 s
Resets the horizontal delay time to
zero.
TDS3000C Series Oscilloscope User Manual 53
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