National Instruments GPIB-PC - Manual (Page 40)

Section Two Installation and Configuration
©National Instruments Corp. 2-15 GPIB-PC User Manual
Local Lockout on all Devices (Boards Only)
It is desirable to place many devices in the local lockout state while
they are being remotely accessed. If yes is selected, the access board
will place all of its devices in local lockout state while accessing them.
Disable Auto Serial Polling (Boards Only)
This option allows you to disable automatic serial polls if this feature is
incompatible with certain devices on the bus. While this feature is on,
the handler conducts serial polls of the devices and stores positive
responses whenever the GPIB Service request (SRQ) line is asserted.
Refer to Automatic Serial Polling of Section Four for further information.
Normally, this feature will not conflict with devices that conform to the
IEEE-488 specification.
High-Speed Timing (Boards Only)
Some devices are unable to read data messages at high-speed (Tri-
state) timing. If your GPIB system has slower devices, you may want to
select a longer data setting time by selecting no for this field.
Interrupt Jumper Setting (Boards Only)
This field must be set to the same value as the interrupt level jumper
setting on the GPIB-PC board itself. For most personal computers, this
jumper setting reflects the actual interrupt level selected. Any
exception is explained in the Getting Started with your GPIB-PC
pamphlet that comes with the interface board. Any valid interrupt level
may be selected, provided the level does not conflict with other
equipment.
Base I/O Address (Boards Only)
The GPIB-PC may be assigned any one of the legal base I/O or port
addresses as described in the appropriate supplement to this section.
The value entered must match the hardware setting selected during
hardware configuration. If it does not match, the handler cannot
communicate with the GPIB-PC.