BIRD THRULINE 4021, Instruction Book

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IEEE-488 GPIB Interface
17
I nter F ace C lear (IFC)
Function
Terminates all bus activity and passes control to the system
controller.
Remarks
All devices are set to talker and listener idle states.
REN is set to false.
REMOTE, TALK, LISTEN, and LOCAL LOCKOUT modes are
cancelled, and their indicators are turned off.
D evice CL ear (DCL)
Function
Resets the status of all devices to an initialized state.
Remarks
Does not change the current interface mode.
The 4421 returns to the factory default condition listed in Figure 13.
S elective D evice C lear (SDC)
Function
Resets the status of a selected device to an initialized state.
Remarks
Only the device addressed will be cleared.
The 4421 returns to the factory default condition.
G roup E xecute T rigger (GET)
Function
Initiates a measurement for all devices set to trigger on GET.
Remarks
The 4421 must be already set to trigger on GET.
Used to synchronize measurements of multiple instruments.
Figure 13
IEEE-488 Default
Conditions
Default Condition Related Command
Forward Carrier Wave
FC
Auto Range ON
RYY
Two Terminators (CR LF)
YT
Prefixes YES
PY
Trigger One Shot on Talk Address
T1
All SRQ’s OFF
M00
Send EOI with last byte of message
KY