Configuration and Installation Chapter 3
GPIB-1014 User Manual 3-10 © National Instruments Corporation
Cabling
Two options are available for GPIB I/O from the GPIB-1014:
• A Front Panel Plug-In Connector
• A VMEbus P2 Connector
The Model GPIB-1014-1 interface board has a standard 24-pin IEEE 488 connector on the front
panel of the board. A standard GPIB cable can plug in directly to this connector. Two GPIB
cables cannot be connected side by side in this configuration; that is, if more than one Model
GPIB-1014-1 is installed in the system, they cannot be placed side by side due to the width of the
GPIB cable connector housing (another board must be placed between any two GPIB-1014-1
interface boards).
The Model GPIB-1014-2 interface board has no connector on the front panel; therefore, GPIB
I/O is performed through the VMEbus P2 connector. A scrambler card and interface cable
assembly are available from National Instruments for this configuration. The interface cable
assembly is a 96-wire flat ribbon cable used to connect the GPIB I/O signals from the backplane
P2 connector to the scrambler card, where they are routed to the IEEE 488 connector. A
standard GPIB cable enters the chassis through the rear to plug into the IEEE 488 connector on
the scrambler card. The scrambler card is equipped with a 96-pin DIN connector and a 24-pin
IEEE 488 connector. A dual connector version of the scrambler card is also available for use
with two GPIB-1014-2 Interface Cards.
The Models GPIB-1014-EH, GPIB-1014-1S, and GPIB-1014-1S-EH interface boards use the
same cable as the Model GPIB-1014-1.
Verification Testing
A performance verification test can be run to ensure the board has not been damaged during
shipment and also to ensure that the board has been configured correctly. To do this, you need
an interactive control program or an equivalent mechanism, such as front-panel control jumper or
a front-panel emulator, that can load and read memory and I/O addresses.
The tests presented in Chapter 7 of this manual consist of a series of steps written in a pseudo
(processor-independent) language with instructions. The steps generally involve writing data to
specific GPIB-1014 device registers followed by reading other GPIB-1014 registers to verify that
the programming is correct. These tests exercise virtually all of the major functions of the
GPIB-1014, including I/O communications, DMA operation, and GPIB communications. All
functions except GPIB communications can be performed as stand-alone operations (that is,
without another GPIB device). To completely check the GPIB functions, you must use a bus
tester or analyzer (such as a National Instruments GPIB-400 or GPIB-410) that can monitor and
control GPIB signal lines; emulate GPIB Talker, Listener, and Controller devices; and
single-step through the Source and Acceptor Handshakes.