Fluke 5790A, Руководство оператора

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Remote Operation
The IEEE-488 Connector
5
5-29
SDC
Selected Device
Clear
Does the same thing as DCL, but only if
the 5790A is currently addressed as a
listener.
CLEAR @
SPD Serial Poll Disable Cancels the effect of a Serial Poll Enable. (Part of SPL)
SPE Serial Poll Enable
After the 5790A receives this message, it
sends the Status Byte the next time it is
addressed as a listener, no matter what
the command is.
(Part of SPL)
UNL Unlisten
"Unaddresses" a specific device on the
bus as a listener. The controller sends
UNL automatically after the device has
successfully received a device-
dependent or common command.
(None)
UNT Untalk
"Unaddresses" a specific device on the
bus as a listener. The controller sends
UNT automatically after it receives the
response from a device-dependent or
common query.
(None)
Table 5-8. Interface Messages that the 5790A Sends
Mnemonic Name Function
END End
A message that occurs when the 5790A asserts
the EOI control line. The 5790A asserts EOI
while it transmits the ASCII character LF for its
termination sequence or terminator.
DAC Data Accepted Sets the handshake signal line NDAC low.
DAV Data Valid Asserts the handshake signal line DAV.
RFD Ready for Data Sets the handshake signal line NRFD low.
SRQ Service Request
A control line that any device on the bus can
assert to indicate that it requires attention. Refer
to "Checking 5790A Status" for details.
STB Status Byte
The Status Byte is what the 5790A sends when it
responds to a serial poll (interface message
SPE).