Getting Started
1–12 VX4380 256-Crosspoint Relay Matrix Module User Manual
During a commanded self test:
1. SYSFAIL* is not asserted.
2. The module executes the same instrument self test as is executed upon
power on.
3. When the self test is completed, the modules controlled by the Option 01 are
restored to their pre-test state.
An operational check of the VX4380 may be performed by checking the
continuity of the switch closures using an ohmmeter or a test light.
When equipped with the Option 01 VXI Interface, the commands
 
will open all of the relay paths. All relays on the VX4380 will also be opened
automatically on power-on. Figure 1–1 VX4380 Functional Block Diagram
shows the configuration of the VX4380 with all paths open. Refer to Appendix
B: Input/Output Connections for the connector pinouts and the Functional Block
Diagram. Use a continuity tester to verify that all rows are open to all columns.
 
Will close the 2-wire switch path from row 1 of section 1 to column 1 of section
1 (Row01Lo of Section 1 to Col01Lo of Section 1, and Row01Hi of Section 1 to
Col01Hi of Section 1). Check the continuity. Be careful to prevent damage to the
pins of the front panel connectors.
Note that true measurement of the resistance of the path requires a high-resolu-
tion instrument and special procedures which are beyond the scope of this check.
Use the commands
 
and
 
to open the previous path and close the 2-wire switch path from row 1 of section
1 to column 2 of section 1. Check for continuity of the two paths.
Use the commands
 
and
 
Operational Check