14
HANDY HINTS:
Pressing and holding ANY key (hardkey or softkey) will bring up a help screen on the display.
This is a great way to learn about oscilloscope features.
Softkeys are at the bottom of the display. They will appear when a Hardkey is pressed.
DON’T use the oscilloscope to delete files on your floppy disk, except files that IT created.
Autoscale may not give a desirable result; use Undo Autoscale if this happens.
When you use Autoscale, the ‘scope looks for repetitive waveforms 10 mVpp or larger, a duty
cycle greater than 0.5%, at no less than 50 Hz, and will turn off any channel not meeting those
criteria. It will choose as its trigger source whichever of these has a valid signal on it, in the
order listed: External Trigger, Channel 2, then Channel 1.
If you have signals on channels 1 and 2, when you use Autoscale the ‘scope automatically
chooses channel 2 as the trigger source. You may need to manually change the trigger source
to channel 1.
Measurements made with Quick Meas may give incorrect results, particularly on noisy signals.
Look carefully at the cursor lines to see if you agree that the cursor lines are showing what you
want to measure. If your displayed signal is noisy for any reason, try using Averaging to clean
it up. If the noise is too big to eliminate with Averaging, using manual cursors to make your
measurements.
The Entry Knob (at the right side of the display) is used to change many settings, depending on
which Softkeys are showing.
Be sure the Probe value (attenuation factor) for both channels is set correctly for your probes.
Every time you return the oscilloscope to Default Setup, the probe attenuation factor is set to
1.0:1. You must change it back to 10:1 (assuming you are using 10X probes).
You can move the trigger point, which is the center of the graticule by default, using the
Main/Delayed hardkey and the Time Ref softkey.
The intensity of the grid on the graticule may be changed by pressing the Display hardkey and
using the Grid softkey.
You can save a “setup”, which stores the waveforms, cursors, math measurements, horizontal,
vertical and trigger settings to a floppy disk or to an internal oscilloscope memory. When you
recall that information, you can elect to restore the setup, or the waveform trace, or both.
(66 Seiten)
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