LeCroy Digital Oscilloscopes, Manual

Page: 39 / 213

²
Next, press
Then press the corresponding to select “
$EVROXWH
”
from the “type” menu.
Move the cursor to the right of the upper trace until it
reaches the FFT trace.
Note that the readings are now labeled in Hz (horizontal) and
dBm (vertical).
The first frequency component at left-of-screen should be the
square wave’s fundamental frequency (1 kHz). The following
components (3 kHz, 5 kHz, 7 kHz...) are the harmonics that
contribute to building the square wave.
To return to normal operation: Press the top to select
“
2II
”.
Now press to return to normal
triggering.
:DYHIRUP6WRUDJH
The scope has four waveform memories: M1,
M2, M3 and M4. In this example, the waveform
will be stored in M2.
Press to turn off Trace C and FFT.
Now press
Then press the respective s
to select “ ” from the “store” menu, “
0
”
Note: Waveform
memories allow the
temporary saving of
waveforms for later
comparison or analysis —
an important benefit of
digital oscilloscopes.