Tabor Electronics 5251, Руководство пользователя

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TE5251
User Manual
3-14
Using the Memory
Partition Table
If you want to learn more about waveform memory and segment
control, you should refer to section 2 of this manual. In general, the
5251 can generate arbitrary waveforms but, before it can generate
waveforms, they must be downloaded to the instrument from a host
computer. Waveforms are downloaded to the instrument as
coordinates and are stored in the 5251 in a place designated as
“waveform memory”. The waveform memory has a finite size of 2M.
Having such long memory does not necessarily mean that you have
to use the entire memory every time you download a waveform. On
the contrary, the 5251 allows segmentation of the memory so that
up to 10,000 smaller waveforms could be stored in this memory.
There are two ways to divide the waveform memory to segments:
1) Define a segment and load it with waveform data, define the next
and load with data, then the third etc. or 2) Use what ArbConnection
has to offer and that is to make up one long waveform that contains
many smaller segments, download it to the instrument in one shot
and then download a memory partition table that splits the entire
waveform memory into the required segment sizes. Want to use it?
Here is how it is done. Point and click on the Memory Partition. A
dialog box as shown in Figure 3-8 will pop up.
Figure 3-8, the Memory Partition Table
The two main fields in the segment table are Segment number and
segment size. The
Seg No (segment number) is an index field that
can has values only, from 1 to 10,000. The Segment Size is always
associated with the segment number. You can program any
segment size from 16 to 2 M.
Use the Append key to add a segment at the end of the segment
list. If you highlighted a segment, the Append key turns
automatically to insert 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.