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Option 01 VXI Interface Module User Manual
2–1
Operating Basics
The Option 01 VXI Interface Module is a VXIbus message-based instrument and
communicates using the VXIbus Word Serial Protocol. The module is pro-
grammed by issuing ASCII characters from the system controller to the Option
01 via the module VXIbus commander and the VXIbus mainframe backplane.
Refer to the manual for the VXIbus device that will be the Option 01 daughter
board’s commander for details on the operation of that device.
If the module commander is a Tektronix IEEE-488 Interface Module, refer to the
operating manual for the module and Appendix B: Examples in this manual for
information on how the system controller communicates with the commander
being used.
Functional Overview
The Option 01 VXI Interface Module is a printed circuit board that resides on a
C-size VXI module belonging to the Tektronix “SurePath” family of relay
modules. This family of relay modules includes the VX4320 RF Mux, VX4330
Scanner/Mux, VX4350 General Purpose Switch, and VX4380 Matrix modules.
Commands conforming to the 1994 SCPI and IEEE-488.2 specifications are sent
to the Option 01. The Option 01 parses these commands and controls the module
on which it is installed and additional SurePath modules installed in contiguous
slots to its right. VX4372 and VX4374 Scanner Slave modules can also be
controlled by the Option 01.
Power-on
The instrument runs its self test and is ready for programming five seconds after
power-on. The VXIbus Resource Manager can add an additional delay. The
Power LED of each relay module controlled by the Option 01 will be on. The
Failed LED on each of these modules will be off. The default condition of the
module after power-on is listed in the *RST command description. Self-test
failures are described in the *TST? command description.
The format and syntax for the command strings are described in the Command
Syntax section. A complete description of each command in alphabetical order is
in the Command Descriptions section.