Agilent Technologies HP 82335, Install Manual, Page: 37 / 54

HP-IB Fundamentals
HP-IB Description
!FC
KEN
SRQ
DAV
NRFD
NDAC
28
Interface Clear is under the exclusive control of the system
controller. When it is pulsed true, all device interfaces
are
returned to an idle state, and the state of the bus is cleared.
Remote Enable may be set by the system controller to permit
devices to operate in Remote mode-that is, under
programmed HP-IB control instead of via the device's front
panel.
Service Request can be set by a device on the interface to
indicate it is in need
of
service. SRQ might be set at the
completion of a task such as taking a measurement, when an
error is detected during device operation, or when requesting
to be active controller.
Data Valid is a handshake line indicating that the active
talker has placed data on the data lines (DID] through
m08).
Not Ready For Data is a handshake line indicating that one
or more active listeners is not ready for more data, and the
active talker should wait before sending new data on the bus.
Not Data Accepted is a handshake line indicating that one or
more active listeners has not accepted the current data byte,
and the active talker should leave the current byte asserted on
the data lines.
A