User Manual LW120
!
50
TTL
POWER
I
0
OUTPUT
LeCroy
MODEL
100 MS/s ARBITRARY WAVEFORM
!
50
CHAN
1
SYNC
CHAN
2
RESET
CURSOR
MAN
TRIG
TRIGGER
AMPLITUDE
FREQUENCY
UTILITY
WAVEFORM
6
9
7,10
8,11
Figure 3-14. Modifying the SYNC Parameters
Sync Pulse
Position 0
Width 1
Back
Selecting the
Filter Type
Two filters are available for each channel. These filters have fixed
cutoff frequencies of which their properties are specified in
Appendix A. The built-in filters are switched in after the DAC circuit
and are used for reducing the noise, harmonics and spurious
signals above the cutoff frequency. More than 1 filter can be applied
at any time, the effects being additive.
The built-in filters are available for the user in standard, arbitrary
and sequenced modes. The only function where the Model LW120
does not allow external control is when standard sinusoidal
waveform is selected.
Note
The default output function of the generator is the sine
waveform. The instrument is using filters to generate this
waveform therefore, the state of the filters can not be changed
until another output function is selected. A setting conflict error
will occur if one attempts to change the filter state before
changing to another output function.
Use Figures 3-15 and 3-16, along with the following description to
learn how to select filters. Before you change filters, make sure that
your output waveform is different than sinewave.
1. Press the OUTPUT button
2. Select and press the Filters
3. Select and press either Filter CH1 or Filter CH2
4. Rotate the dial to select one of the filter options:
Using The Instrument 3-18