Operating Instructions—434
7. Adjust the CH 1 V O LTS /DIV switch and the
amplitude of the external horizontal signal to obtain a
display which remains w ithin the display area.
STORAGE OPERATION
General
The following demonstrations are intended to illustrate
the various types o f stored displays that are possible and
the techniques required to obtain them.
Slow and Medium Sweep Rates
Repetitive-Sweep Storage. This method of storage is
used fo r repetitive waveforms that produce normally bright
displays on the CRT screen.
1. Set up a display of the PROBE CAL 0.6 V 1 kHz
waveform in the manner described in "Norm al Sweep
Display".
2. Turn the INTENSITY control fu lly counterclockwise.
3. Press in both STORE buttons. The normal storage
mode background light level will be present on the storage
screens.
4. Advance the INTENSITY control slowly in the clock
wise direction to produce a waveform display of normal
intensity, then return the control to the minimum (counter
clockwise) position. A stored waveform of moderate bright
ness should remain. Each half of the CRT display area can
be stored or erased independently. To erase the stored
display, press in the appropriate ERASE pushbutton(s).
Single-Sweep Storage. This method is used for single
sweep events that produce adequate stored displays.
1. Set up a display of the PROBE CAL 0.6 V 1 kHz
waveform in the manner described in "Norm al Sweep
Display".
2. Set the Sweep MODE to SING LE SWEEP.
3. Press in both STORE buttons.
4. Apply a single sweep of the trace by pressing the
RESET pushbutton. A stored display of the calibrator
waveform should remain on the storage screen. If it does
not, repeat the demonstration w ith the display intensity
increased slightly.
5. During single-sweep operation, the LOCATE push
button can be used to locate the trace or display while the
sweep is held off. Pressing the LOCATE button unblanks
the CRT and allows the display to be positioned before
storing.
Integrated Fast-Rise Waveforms
The INTEGRATE pushbutton, when used in conjunction
w ith the INTEN SITY control, permits storage of relatively
fast-rising and fast-falling portions of a waveform. This
method may also be used for producing a high-resolution
display of a low -jitter repetitive waveform.
1. Set up a display of the PROBE CAL 0.6 V 1 kHz
waveform in the manner described in "Norm al Sweep
Display".
2. Turn the INTEN SITY control fu lly counterclockwise.
3. Press in both STORE buttons. The normal storage
mode background light level w ill be present on the storage
screens.
4. Advance the INTENSITY control slowly in the clock
wise direction to produce a waveform display of normal
intensity, then return the control to the m inimum (counter
clockwise) position. A stored waveform of moderate bright
ness should remain. However, it should be noted the rising
and falling portions of the waveform do not store.
5. Simultaneously press both ERASE buttons to clear
the CRT screen.
6. Press the INTEGRATE button and hold it in.
7. Advance the INTEN SITY control until the vertical
portions of the trace are just barely visible.
8. Hold the INTEG RATE button fo r a few seconds,
then turn the INTENSITY control to minimum while the
INTEGRATE button is still pressed.
9. Release the INTEGRATE button. Both the horizontal
and vertical segments of the display should now be stored.
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