R&S ZVB - Page 1164

R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT Annexes
Interfaces and Connectors
Operating Manual 1145.1084.12 – 30 1149
(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.
Addressed Commands
Addressed commands are encoded in the range 00 through 0F hex. They are only effective for
instruments addressed as listeners.
Command
QuickBASIC
command
Effect on the instrument
GET
(Group Execute
Trigger)
IBTRG (device%)
Triggers a previously active device function (e.g. a sweep). The effect of the command is
the same as with that of a pulse at the external trigger signal input.
GTL
(Go to Local)
IBLOC (device%)
Transition to the "Local" state (manual control).
PPC
(Parallel Poll
Configure)
IBPPC (device%,
data%)
Configures the instrument for parallel poll. Additionally, the QuickBASIC command
executes PPE/PPD.
SDC
(Selected Device
Clear)
IBCLR (device%)
Aborts the processing of the commands just received and sets the command processing
software to a defined initial state. Does not change the instrument setting.
Instrument Messages
Instrument messages (commands) are transferred on the data lines of the GPIB bus while the ATN line is
not active. ASCII code is used.
Structure and syntax of the instrument messages are described the SCPI Reference chapter. The chapter
also provides a detailed description of all messages implemented by the analyzers.