R&S AFQ100A
Remote Control Hardware Interfaces
1401.3084.32 5.34
E-3
IEC/IEEE-Bus Interface Functions
Instruments which can be remote controlled via the IEC/IEEE bus can be equipped with different
interface functions. The following table lists the interface functions appropriate for the instrument.
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
Table 5-6
IEC/IEEE Bus Interface functions
IEC/IEEE Bus Messages
Interface messages are transferred on the data lines of the IEC/IEEE bus when 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 IEC/IEEE bus.