R&S
®
CMW 500 Annexes
Interfaces and Connectors
Operating Manual 1202.3986.32 – 03 419
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, de-addressed by MTA.
T6 Talker function, full capability, ability to respond to serial poll, deaddressed by 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
11.1.3.2 Interface Messages
Interface messages are transmitted to the instrument on the data lines, with the
attention line being active (LOW). They serve to communicate between controller and
instrument.
Universal Commands
Universal commands are encoded in the range 10 through 1F hex. They are effective
for all instruments connected to the bus without pervious addressing.
Command QuickBASIC
command
Effect on the instrument
DCL
(Device
Clear)
IBCMD
(controller%,
CHR$(20))
Aborts the processing of the commands just received and sets the command
processing software to a defined initial state. Does not change the
instrument settings.
IFC
(Interface
Clear)
IBSIC
(controller%)
Resets the interfaces to the default setting.
LLO
(Local
Lockout)
IBCMD
(controller%,
CHR$(17))
The LOC/IEC ADDR key is disabled.
SPE
(Serial Poll
Enable)
IBCMD
(controller%,
CHR$(24))
Ready for serial poll.
SPD
(Serial Poll
Disable)
IBCMD
(controller%,
CHR$(25))
End of serial poll.
PPU
(Parallel Poll
Unconfigure)
IBCMD
(controller%,
CHR$(21))
End of the parallel-poll state.
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