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Instrument Address (Selects the Instrument)
Each instrument on the HP-IB port must have a unique instrument address
between decimals 0 and 30. The device address passed with the program
message must include not only the correct instrument address, but also the
correct interface select code.
Example
For example, if the instrument address is 4 and the interface select code is 7,
the instruction will cause an action in the instrument at device address 704.
DEVICE ADDRESS = (Interface Select Code) X 100 + (Instrument
Address)
Local, Remote, and Local Lockout
The local, remote, and remote with local lockout modes may be used for
various degrees of front-panel control while a program is running. The logic
analysis system will accept and execute bus commands while in local mode,
and the front panel will also be entirely active. If the HP 16500B is in remote
mode, the system will go from remote to local with any touchscreen, mouse,
or keyboard activity. In remote with local lockout mode, all controls (except
the power switch) are entirely locked out. Local control can only be restored
by the controller.
Hint
Cycling the power will also restore local control, but this will also reset
certain HP-IB states. It also resets the system to the power-on defaults and
purges any acquired data in the acquisition memory of all the installed
modules.
The instrument is placed in remote mode by setting the REN (Remote
Enable) bus control line true, and then addressing the instrument to listen.
The instrument can be placed in local lockout mode by sending the local
lockout (LLO) command. The instrument can be returned to local mode by
either setting the REN line false, or sending the instrument the go to local
(GTL) command.
Programming Over HP-IB
Local, Remote, and Local Lockout
2–5
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Содержание HP 16500B
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