Section Two Installation and Configuration©National Instruments Corp. 2-15 GPIB-PC User ManualLocal Lockout on all Devices (Boards Only)It is desirable to place many devices in the local lockout state whilethey are being remotely accessed. If yes is selected, the access boardwill 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 isincompatible with certain devices on the bus. While this feature is on,the handler conducts serial polls of the devices and stores positiveresponses 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 theIEEE-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 toselect 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 jumpersetting on the GPIB-PC board itself. For most personal computers, thisjumper setting reflects the actual interrupt level selected. Anyexception is explained in the Getting Started with your GPIB-PCpamphlet that comes with the interface board. Any valid interrupt levelmay be selected, provided the level does not conflict with otherequipment.Base I/O Address (Boards Only)The GPIB-PC may be assigned any one of the legal base I/O or portaddresses as described in the appropriate supplement to this section.The value entered must match the hardware setting selected duringhardware configuration. If it does not match, the handler cannotcommunicate with the GPIB-PC.
