Symmetricom 5071A, Operating And Programming Manual

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Appendix A Performance Tests
5071A Complete Performance Tests
156 Operating and Programming Manual
This shows that frequency difference between the unit under test and the
reference is 4.9 parts in ten to the 13th. This is only an example. The measured
frequency accuracy of a 5071A should be 1 10
-12
or better for a standard unit, or
5 10
-13
or better for a high performance unit. Note the final computation should
include the accuracy of the reference source.
12 Record the actual reading in the appropriate place in the Performance Test
Record.
Test 3 — Stability
High accuracy precision measurements of time stability are available through the
National Institute of Standards and Technology (NIST) in the USA. NIST can
completely characterize and verify all major specifications of the 5071A. For
information regarding the various tests available, contact:
M.C. 847.4
National Institute of Standards and Technology
325 Broadway
Boulder CO 80303-3328
USA
Telephone: (303) 497-3753
A. Time Domain
This is an engineering-level measurement requiring a special test setup. The test
setup must be carefully designed to eliminate all sources of noise. For more
information on how to make this measurement, see Application Note 358-12.
Also, see NIST Technical Note 1337 (available from US Government Printing
Office, Washington DC., USA). This is an excellent theoretical as well as
technical reference for this measurement.
Record the actual reading in the appropriate place in the Performance Test
Record. This completes the performance test.
B. Frequency Domain
This measurement requires the Agilent E5500 Phase Noise Measurement System,
a highly specialized test system. In order to perform properly, this system must
contain a reference oscillator with phase noise characteristics that are equal to or
better than the 5071A. Instructions for performing frequency domain stability
tests can be found in the Agilent E5500 system documentation.
Record the actual reading in the appropriate place in the Performance Test
Record.
NOTE