Appendix A Performance Tests
5071A Complete Performance Tests
Operating and Programming Manual 153
Test 2 — Frequency Accuracy
The following accuracy check measures the changing phase relationship between
the 5071A 10 MHz output and another primary frequency standard (5071A
Primary Frequency Standard or better). An HP/Agilent K34-59991A Linear
Phase Comparator (no longer available) is used to in the following procedure to
measure the phase between the 5071A under test and the reference standard.
If an equivalent phase comparator or software is being used, refer to this
procedure as a general guide.
In this test, the reference standard must be of known accuracy. The measurement
time must be of sufficient length so the accuracy of the measurement is not
impaired by the stability of either the reference standard or the unit under test. If
the reference standard is a 5071A with Option 001, the accuracy measurement
must be made for 24 hours if the unit under test is a standard unit. The test can be
made in 2 1/2 hours if the unit under test has Option 001 (High Performance
Cesium Beam Tube).
Equipment
Agilent K34-59991A Linear Phase Comparator, or equivalent software
Strip Chart Recorder
Setup
Figure A-7. Frequency Accuracy Test Setup
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