A-22
A3
A3 GPIB CONNECTOR/SWITCH BOARD ASSEMBLIES
A3.1
BOARD DESCRIPTIONS
The GPIB Connector/Switch Board Assemblies are small printed circuit
boards that provide a convenient way to mount an IEEE-488 Connector and
an Address Switch on the rear of the host unit. They connect to the 4803
with a flat ribbon cable that plugs into the GPIB/Address header (J2).
The GPIB Connector/Switch Board Assemblies are available in two layout
styles. The Horizontal Connector/Switch Board Assembly has the Address
Switch in line with the IEEE-488 connector as shown in Figure A-9(a). The
Vertical Connector/Switch Board Assembly has the Address Switch located
on top of the IEEE 488 connector as shown in Figure A-9(b).
The Address Switch is an eight position rocker switch. For the 4803, the
five left most switches set the GPIB address. The bit weights are shown in
Figure A-10. Up is a logical 1, down is a logical 0.
The assemblies may be ordered with any length flat ribbon cable, from 10
to 90 cm long. The dash number specifies the cable length. Order as:
Type
Part Number
Horizontal Conn./Sw Assy
113640-90
with 90 cm long cable
Vertical Conn./Sw Assy
113642-90
with 90 cm long cable
A3.2
BOARD INSTALLATION
Both the Horizontal and the Vertical Connector/Switch Board Assemblies
are designed to be mounted to the rear panel of the host equipment's rear
panel by the included metric studs. The following are the suggested
installation steps:
1. Select the appropriate cutout from Figure A-11
2. Locate a blank area or the host's rear panel. Leave enough room
for the flat ribbon cable bend radius.
