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Appendix E: Performance Verification
A–20
VX4801 Programmable Digital I/O Module
NOTE. Commands to the VX4801 may be entered in upper or lower case.
However, to avoid confusion between the alphanumeric characters; e.g. one (1)
and L or zero( 0) and o, all commands are shown in the case which provides the
greatest distinction. Use special care when interpreting these characters.
Prerequisites
The verification sequences in this procedure are valid when the following
requirements are met:
H The VX4801 module covers are in place and the module is installed in an
approved VXIbus mainframe as described in Section 2 of the Operating
Manual
H The VX4801 has passed the power-on self test
H The VX4801 is operating in an ambient environment as specified in
Section 1 of the Operating Manual for a warm–up period of at least 10
minutes
Equipment Required
This Procedure uses traceable signal sources and measurement instruments.
Table 1 lists the required equipment. You may use equipment other than the
recommended examples if it meets the minimum requirements.
Table 1: Required Test Equipment
Item Number and Description Minimum Requirements Example Purpose
1. Digital Volt Meter (DVM) 5-1/2 digit, 100 VDC range, accuracy
> 0.002 %.
FLUKE 8842A Checking isolation impedance
2. Digital I/O Module 4 byte TTL/CMOS data I/O Tektronix VX4801 Checking external functions
3. Loop-Back Cable Assembly Male DB-50 Connector, two required
(Tektronix part number 131-1344-00)
Male DB-25 Connectors, are required
(Tektronix part number 131-0570-00)
26 AWG ribbon wire
Assemble as shown in
Figure 4
Checking TTL/CMOS Data
I/O, Tri-State, and Hand-
shake.