Digitizers Verification Tests 151Appendix D
Appendix D
Digitizers Verification Tests
Introduction
This appendix provides information on functional and performance
verification of the E1563A 2-Channel Digitizer and E1564A 4-Channel
Digitizer.
Types of Tests You can perform performance verification tests at two different levels
depending on need:
• Functional Verification Test - A series of internal verification tests
(self-tests) that give a high confidence that the digitzer is
operational. The self-tests take less than 20 seconds to
complete.
• Performance Verification Test - A complete set of tests that are
recommended as an acceptance test when the instrument is first
received or after performing calibration of the digitizer.
WARNING Do not perform any of the following verification tests unless
you are a qualified, service-trained technician and have read
the WARNINGS and CAUTIONS in Chapter 1 and the Warnings
and Safety information in the front matter.
Recommended Test
Equipment
Test equipment recommended for the performance verification and
calibration procedures are listed in Table D-1. Use a source with accuracy
requirements indicated in the table for any substitute calibration standard.
You should complete the Performance Verification tests at one year
intervals. For heavy use or severe operating environments, perform the
tests more often.
Special care must be taken to ensure that the calibration standards and test
procedures used do not introduce additional errors. Ideally, the standards
used to test and calibrate the digitizer should be an order of magnitude more
accurate than each digitizer range full scale error specification.
Table D-1. Recommended Test Equipment.
Application Recommended Accuracy Requirements
Gain Calibration and
Verification
Fluke 5700A <1/5 digitizer spec ±1ppm
linearity