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148 VEE User’s Manual
3 Easy Ways to Control Instruments Chapter
4 To place the object on the screen, make sure that fgen(@(NOT
LIVE)) is still highlighted, and click Create I/O Object
Direct
I/O.
Figure 92 shows the Direct I/O object.
Figure 92 A Direct I/O Object
To use a Direct I/O object in a program, you have to configure
I/O transactions. The next section explains writing text
commands, reading data, and uploading/downloading
instrument states.
Sending a Single Text Command to an Instrument
To send a single text command to an instrument, type in the
appropriate string. Most GPIB instruments use alphanumeric
strings for commands sent to the instrument. For example, to
send a command to the HP3325B Function Generator to set the
amplitude to 5 volts, you would enter the command string "AM
5 VO".
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