Measurement Computing Digital488 - Manual (Page 28)

Section 2 Getting Started
2.12
2.4.5 Interface Clear (IFC)
IFC places the Digital488 in the Talker/Listener Idle State and pulses
the Clear output line for approximately 50 microseconds.
2.4.6 Serial Poll Enable (SPE)
When Serial Poll Enabled, the Digital488 sets itself to respond to a
serial poll with its serial poll status byte if addressed to talk. When the serial
poll byte is accepted by the controller, any pending SRQs are cleared. The
Digital488 will continue to try to output its serial poll response until it is
serial poll disabled by the controller.
2.4.7 Serial Poll Disable (SPD)
Disables the Digital488 from responding to serial polls by the
controller.
2.4.8 Unlisten (UNL)
UNL places the Digital488 in the Listener Idle State.
2.4.9 Untalk (UNT)
UNT places the Digital488 in the Talker Idle State.