OPTION DESCRIPTIONS
All communication to or from the IEEE-488 port is in the ASCII format. At power up, the
interface is in the wait/idle state. To talk to our interface, send the following
commands/mnemonics in the order listed below:
UNL (unlisten)
MTA (my talk address containing the address of the controller)
LAG (listen address group containing the address of our interface)
The attention/log-on character (see Section 4.1 of the main Manual)
The command/ID character
The specific data (if applicable).
Note: With the exception of UNL, MTA, and lAG, the protocol is identical to
that of the RS-232 I/O. When communicating to the 488 interface, if more than 30
seconds elapses between commands, the I/O will time out and the communication will
have to be repeated.
If after talking to our interface, it is necessary to receive some data, send the following
commands/mnemonics:
UNL (unlisten)
MLA (my listen address containing the address of the controller)
TAG (talker address group containing the address of our interface).
Our interface will always respond with specific data followed by CR/LF.
1.3 MAINTENANCE
No routine maintenance is required.
Symmetricom Inc ET6xxx ExacTime GPS TC & FG (Rev C) C-37
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