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Chapter 4
Software Reference
© National Instruments Corp.
4-21
GPIB-410 User Manual
When accessing this screen, no input fields can be selected when the
following operational modes are enabled.
•
Generate
•
Monitor Input
To start the Pattern Generator type <Alt-G>. When generating is
enabled
GEN
is displayed in the Title/Status bar and
G
is displayed in
the DOS shell icon. Generating remains enabled until one of the
following conditions occurs.
•
You type <Alt-G> again.
•
The specified pattern sequence runs to completion.
While generating is enabled the toggle switches in the Monitor window
may move or flicker rapidly as patterns are output to the bus. If activity
on the GPIB should hang during this sequence, the switches will contain
the last pattern output. Direct manipulation of the Monitor switches is
not possible while generating is enabled.
Note:
During high-speed DMA operation, you may notice a
discrepancy between toggle switch settings and the
corresponding status indicators. This is normal.
For command file operation, use the load function <Alt-L> to preload or
reload the specified command file. The use of this function is optional–
when the Pattern Generator is enabled, it will scan and load the
command file automatically if it is not already loaded. If any errors are
encountered in the command file during the loading process, they are
written to the file
GPIB410.ERR
in the current working directory.
The Pattern Generator screen contains the following fields.
•
No. of times to execute
•
Clear switches when done
•
Send EOI with last byte
•
Pattern Buffer source