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Tektronix 2221A - Displaying Signals; Digitizing Signals

Tektronix 2221A
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BEAM FIND
Figure 3-5: Beam Find
if the beam appears to be stuck on some portion of the display, check the
trigger mode settings. Setting the trigger mode to P-P AUTO wiil give you a
sweep in the absence of a trigger signal. Also check to be sure the X-Y
button is not pushed in and the seconds/division is not set too fast or too
slow for the signal you are trying to display.
f “1 Step 4: Adjust the horizontal and vertical position control(s) to center
the signai display within the compressed area and then release the
BEAM FIND button.
Step 5: Adjust the INTENSITY control to a normal level and adjust the
vertical and horizontal scale with the VOLTS/DiV and SEC/DIV controls.
If you fail to locate the sweep using this procedure you may want to use the
basic analog setup given in the Start Up, page 1-4 and try reapplying the
signal to the input.
Digitizing Signals
There are four different acquisition modes to choose from when you digitize
a signal in the STORE mode:
Accumulate Peak mode finds the highest and lowest record points over
many acquisitions. It reveals variations in the signal over time.
Average mode calculates the average value for each record point over
many acquisitions. It reduces apparent noise in a repetitive signal.
Sample mode records the first sample in every acquisition interval and
presents more of a real-time" view of the signal.
3-8
In Detail

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