Technical data

66 Agilent VEE - Practical Graphical Programming
3 Instrument Controls
Sending an expression list to an active instrument
1 Select Menu Bar => I/O => Instrument Manager…
2 Select funcgen(@(NOT LIVE)); click on "Direct I/O"; place it to the right
of the Work Area.
3 Double- click on its transaction bar to obtain its Dialog Box.
4 Select WRITE TEXT, and type "FR",A,"HZ" with EOL ON; click OK.
5 Select Menu Bar => Flow => Repeat => For Range; place it to the left of
the Function Generator. (This will simulate the frequency value.)
6 Connect the For Range data output pin to the funcgen(@ (NOT LIVE))
data input pin.
7 Edit the fields in the For Range object as follows. See Figure 3- 7.
From: 10
Thru: 2.1M
Step: 50k
Figure 3-8 An Expression List I/O Command Transaction
NOTE
• FR represents frequency; A represents the frequency value at input terminal A,
and HZ represents the frequency unit: "Hertz".
• The terminal A was added automatically. This transaction command will write
the string "FR", followed by whatever value is sent into input terminal A,
followed by the string "HZ".