Local Lockout
Demonstration,
Example Program 2
When the swept signal generator is in REMOTE mo de, all the front
panel keys are disabled except the LOCAL key. But, when the
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 PRINT "Verify that all keys are ignored,
except the 'LOCAL' key."
100 PRINT "Verify that 'LOCAL' causes the
REMOTE LED to go OFF."
110 PRINT " ..... press CONTINUE"
120 PAUSE
130 REMOTE Source
140 LOCAL LOCKOUT 7
150 PRINT
160 PRINT "Source should now be in LOCAL LOCKOUT mode."
170 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
Toverify and investigate the dierent remote mo des do the following:
1. Reset the controller.
2. On the swept signal generator: Press
4
PRESET
5
.
3. Clear the controller display and run the program.
4. Verify that the REMOTE LED on the swept signal generator is
lit.
5. From the front panel, attempt to change the start frequency and
verify that this is imp ossible.
6. Verify that all keys except
4
LOCAL
5
are disabled.
7. Now press the
4
LOCAL
5
key and verify that the swept signal
generator REMOTE LED is o and that you can mo dify anyof
the sweep functions.
8. Execute a \continue" on the controller. With the controller
displaying \LOCAL LOCKOUT mo de", verify that the swept
signal generator REMOTE LED is again lit.
Getting Started Programming 1-91
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