Filter
Top Products
55
Chapter 1, Using GPIB
Remote/Local Modes
Local Lockout
The Local Lockout mode disables the front-panel LOCAL key and allows return
to Local mode only by commands from the System Controller (Clear Lockout/Set
Local message).
When a data transmission to the Test Set is interrupted, which can happen if the
LOCAL key is pressed, the data being transmitted may be lost. This can leave the
Test Set in an unknown state. The Local Lockout mode prevents loss of data or
system control due to someone unintentionally pressing front-panel keys.
NOTE: Return to Local mode can also be accomplished by setting the POWER switch to OFF and
back to ON. However, returning to Local mode in this way has the following disadvantages:
1. It defeats the purpose of the Local Lockout mode in that the Active Controller will lose
control of the test set.
2. Instrument configuration is reset to the power up condition thereby losing the
instrument configuration set by the Active Controller.
Clear Lockout/Set Local
The Test Set returns to Local mode when it receives the Clear Lockout/Set Local
message. No instrument settings are changed by the transition from Remote mode
with Local Lockout to Local mode but triggering is reset to FULL SETTling and
REPetitive RETRiggering.