User`s manual

VXI Technology, Inc.
150 Tektronix to VXI Technology Cross-Ref. Guide
INTERFACING TO THE MODULE
The SM4801 has one 160-pin high density ERNI connector on its front panel for I/O interfacing.
A mating connector is shipped with the assembly. The outputs of the SM4801 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 SM4801 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 SM4801 front panel
• custom cabling between SM4801 front panel and ICA/termination panel
For customers who plan on developing their own cabling between the SM4801 and the
termination panel, this section provides a cross-reference pinout table between the VX4801 and
the SM4801 in Tables 17-1 and 17-2.