LeCroy PXA125, User Manual

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User Manual PXA125
ArbConnection 3-61
Use the Append key to add a segment at the end of the segment list.
Use the Insert key to insert a segment at the cursor location. The
Delete key is used for deleting a segment at the cursor position.
The Clear All key will remove all segments from the table and will let
you start designing your segment table from fresh.
Click on the Close to discard of the contents of the dialog box without
saving your last actions and to remove the Segment Table from the
screen but click on the
Store key if you want just to save your work
before you close the dialog box.
The Download key has double action, it will download the segment
table to the instrument and will store the contents of your segment
table.
Using the Sequence
Table
If you want to learn more about sequences and sequence control, you
should refer to Chapter 4 of this manual. In general, the PXA125 can
generate sequenced waveforms but waveforms must be loaded to the
instrument from a computer before it can generate sequences. The
waveforms are downloaded as coordinates and are stored in the
PXA125 is a place designated as “waveform memory”. The waveform
memory has a finite size of 2Meg.
As was explained in Using the Segment Table above, the waveform
memory can be divided into smaller segments and up to 4096
segments can be defined and used as individual arbitrary waveforms.
Having a limited size of waveform memory can, for some applications,
pose a limitation however, if sections of the waveform are repetitive,
one may use the sequence generator to take these segments and
replay them as part of the complete waveform without loosing
valuable memory space and without scarifying waveform coherences,
or integrity. The tool for using repetitive and multiple segments in one
long waveform is called Sequence Generator. ArbConnection has a
special dialog box where sequences are designed. This tool is called
– Sequence Table.
The Sequence Table is demonstrated in Figure 3-7. To access this
table click on the “To Sequence Table” button. Description of the
various controls in this table is given below.