Measurement Computing Analyzer488 - Manual (Page 276)

Appendix G IEEE 488 Primer
G.8
7.2 Listen Address Group (LAG)
There are 31 (0 to 30) listen addresses associated with this group. The 3
most significant bits of the data bus are set to 011 while the 5 least
significant bits are the address of the device being told to listen.
7.3 Unlisten (UNL)
This command tells all bus devices to Unlisten. The same as
Unaddressed to Listen. ($3F)
7.4 Talk Address Group (TAG)
There are 31 (0 to 30) talk addresses associated with this group. The 3
most significant bits of the data bus are set to 101 while the 5 least
significant bits are the address of the device being told to talk.
7.5 Untalk (UNT)
This command tells bus devices to Untalk. The same as Unaddressed to
Talk. ($5F)
7.6 Local Lockout (LLO)
Issuing the LLO command prevents manual control of the instrument's
functions. ($11)
7.7 Device Clear (DCL)
This command causes all bus devices to be initialized to a predefined or
power up state. ($14)