User`s manual

Chapter 1 49
Using HP-IB
Remote/Local Modes
Local To Remote Transitions
The Test Set switches from Local to Remote mode upon receipt of the
Remote message (REN bus line true and Test Set is addressed to
listen). No instrument settings are changed by the transition from
Local to Remote mode, but triggering is set to the state it was last set to
in Remote mode (if no previous setting, the default is FULL SETTling
and REPetitive RETRiggering). The R annunciator in the upper-right
corner of the display is turned on.
When the Test Set makes a transition from local to remote mode, all
currently active measurements are flagged as invalid causing any
currently available measurement results to become unavailable. If the
HP-IB trigger mode is :RETR REP then a new measurement cycle is
started and measurement results will be available for all active
measurements when valid results have been obtained. If the HP-IB
trigger mode is :RETR SING then a measurement cycle must be started
by issuing a trigger event. Refer to “Triggering Measurements” on page
105 for more information.
Remote To Local Transitions
The Test Set switches from Remote to Local mode upon receipt of the
Local message (Go To Local bus message is sent and Test Set is
addressed to listen) or receipt of the Clear Lockout/Set Local message
(REN bus line false). No instrument settings are changed by the
transition from Remote to Local mode, but triggering is reset to FULL
SETTling and REPetitive RETRiggering. The R annunciator in the
upper right corner of the display is turned off.
If it is not in Local Lockout mode the Test Set switches from Remote to
Local mode whenever the front-panel LOCAL key is pressed.
If the Test Set was in Local Lockout mode when the Local message was
received, front-panel control is returned, but Local Lockout mode is not
cleared. Unless the Test Set receives the Clear Lockout/Set Local
message, the Test Set will still be in Local Lockout mode the next time
it goes to the Remote mode.