Local Lockout
When the swept CW generator is in REMOTE mode, all the front
Demonstration,
panel keys are disabled except the LOCAL key. But, when the
Example Program 2
LOCAL LOCKOUT command is set on the bus, even the LOCAL
key is disabled. The LOCAL command, executed from the controller,
is then the only way to return all ( or selected) instruments to front
panel control.
Continue example program 1. Delete line 90 END and type in the
following commands:
90
100
110
120
130
140
150
160
170
PRINT "Verify that all keys are ignored,
except the 'LOCAL' key."
PRINT "Verify that 'LOCAL' causes the
REMOTE LED to go OFF."
PRINT . . . . . press CONTINUE"
PAUSE
REMOTE Source
LOCAL LOCKOUT 7
PRINT
PRINT "Source should now be in LOCAL LOCKOUT mode."
PRINT "Verify that all keys (including 'LOCAL')
have no effect."
180 PRINT . . . . . press CONTINUE"
190 PAUSE
200 LOCAL Source
210 PRINT
220 PRINT "Source should now be in LOCAL mode."
230 PRINT "Verify that the swept signal generator's keyboard
is functional.
240 END
To verify and investigate the different remote modes, do the
following:
1. Reset the controller.
2.
On the swept CW
generator: Press
3. Clear the controller display and run the program.
4. Verify that the REMOTE LED on the swept CW generator is lit.
5. From the front panel, attempt to change the start frequency and
verify that this is impossible.
6. Verify that all keys except (LOCAL) are disabled.
7. Now press the
key and verify that the swept CW
generator
REMOTE LED is off and that you can modify any of
the sweep functions.
8. Execute a “continue” on the controller. With the controller
displaying
“LOCAL LOCKOUT mode”, verify that the swept
CW
generator
REMOTE LED is again lit.
Getting Started Programming
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