Interfaces and Protocols R&S FSL
1300.2519.12 5.34 E-11
GPIB Interface Functions
Instruments which can be remote controlled via the GPIB can be equipped with different interface
functions. Table 5–1 lists the interface functions appropriate for the instrument.
Table 5–1 Interface functions
Control character Interface function
SH1 Handshake source function (source handshake), full capability
AH1 Handshake sink function (acceptor handshake), full capability
L4 Listener function, full capability, unaddress if MTA.
T6 Talker function, full capability, ability to respond to serial poll,
unaddress if MLA
SR1 Service request function (Service Request), full capability
PP1 Parallel poll function, full capability
RL1 Remote/Local switch over function, full capability
DC1 Reset function (Device Clear), full capability
DT1 Trigger function (Device Trigger), full capability
C0 No controller function
GPIB Interface Messages
The messages transferred via the data lines of the GPIB can be divided into two groups: interface
messages and device messages
Interface messages are transferred on the data lines of the GPIB if the "ATN" control line is active
(LOW). They are used for communication between controller and instruments and can only be sent by
the controller which currently has control of the GPIB.
Universal Commands
The universal commands are encoded 10 – 1F hex. They affect all instruments connected to the bus
without addressing.
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