Remote Operation
RS-232 Interface Overview 5
5-23
Table 5-1. Operation State Transitions
From To Front Panel GPIB Message Serial Command
Local
Remote MLA (REN True) REMOTE
Local with Lockout LLO LOCKOUT
Remote
Local Go to Local Softkey GTL or REN
False
LOCAL
Remote with
Lockout
LLO LOCKOUT
Local with Lockout
Local REN False LOCAL
Remote with
Lockout
MLA (REN True) REMOTE
Remote with
Lockout
Local REN False REMOTE
Local with Lockout GTL
RS-232 Interface Overview
The two Calibrator RS-232 ports are in accordance with EIA (Electronic Industries
Association) standard RS-232. RS-232 is a serial binary data interchange that operates
from 300 to 9600 baud (selectable), and distances to a maximum of 50 feet. The
Calibrator rear panel SERIAL 1 FROM HOST port is configured as DTE (Data Terminal
Equipment) while the SERIAL 2 TO UUT is configured as DCE (Data Communications
Equipment). See Appendix C for RS-232 cable and connector information. For more
information, see the EIA standard RS-232.
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