User`s manual

VXI Technology, Inc.
132 Tektronix to VXI Technology Cross-Ref. Guide
INTERFACING TO THE MODULE
The VTI4801 has one, 68-pin high density SCSI connector on its front panel for I/O interfacing. A
mating connector is shipped with the assembly. The outputs of the VTI4801 do not go into tri-state
mode. Tri-state mode is emulated by programming the bi-directional ports as inputs. Also, it is
important to note that the VTI4801 data ports are not isolated.
In many ATE applications, a termination panel for the instrumentation is utilized. This termination
panel will have connectors that mate to the UUT or an intermediate test fixture. A termination
panel may take the form of an Interconnect Assembly (ICA) made by manufacturers such as
Virginia Panel or Macpanel. In either case, it is desirable to maintain the same I/O layout at the
panel to avoid costly redesign of test fixturing or UUT cable assemblies.
VXI Technology offers a couple of options that prevent the need for any interface panel to UUT
redesign as follows:
• wired funnel assemblies that mate directly to the VTI4801 front panel
• custom cabling between VTI4801 front panel and ICA/termination panel
For customers who plan on developing their own cabling between the VTI4801 and the
termination panel, this section provides a cross-reference pinout table between the VX4801 and
the VTI4801 in Table 14-1 and Table 14-2.