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3
Using the Instrument
Generating Arbitrary Waveforms
exceed parameter limits while you key the numbers
3. Select and press a suffix
4. Press Enter to lock in the new value
Alternately, after you display the edit field, you may use the dial
and/or the arrow keys to modify the field then, press Enter to lock in
the new value. If you did not make programming errors and did not
make any mistake while downloading your waveform segment(s),
then the output should generate your desired waveform.
There are four parameters that are available for programming in this
window:
Sample Clock – Defines the sample clock frequency for the
arbitrary waveform. Information how to modify the sample clock is
given in this chapter.
Amplitude – Defines the amplitude of the arbitrary waveform. Note
that regardless of the amplitude setting, the vertical resolution of
which the waveform is generated is always 14 bits.
Offset – Defines the offset value of the arbitrary waveform. The
offset and the amplitude can be freely programmed within a 10V
window (+5V to -5V rails).
Active Segment– Defines which of the segments in the working
memory is currently active at the output connector. As was
discussed earlier, the working memory can be divided to 2k
segments and different waveforms loaded in each segment. Any
segment is available at the output connector only if it has been
selected to be the active segment. The segment selection field lets
you select any segment from 1 to n regardless if it contains
waveform data or not so be careful when you select a segment
number as it may be empty and no output will be generated.
Delete Segments – Allows distractive removal of all segments from
the memory. In fact, this command does not erase the memory but
only removes the table that defines start and stop for each segment
location. If you have recorded your segment sizes you can always
re-define the segment table, which will restore the original
waveforms in each segment. There is however, no way back if you
perform a download action after you delete the segment table.
3-37
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