Service manual

2 21

Performance Test

2. Performance Test

Frequency Accuracy Test

This test checks the frequency accuracy of the internal frequency reference with a

frequency counter and a frequency standard.

Specification

Frequency Accuracy: ± 20 ppm at (23±5) ºC (without Option 1D5)

± 0.13 ppm at 0 ºC to 55 ºC (with Option 1D5)

Test Equipment

Description Recommended Model

Frequency Counter 5334B or 53181A

Frequency Standard 5071A

4TP to BNC Interface Box p/n 04294-61002

BNC(m) -BNC(m) Cable, 61 cm p/n 8120-1839

BNC(m)-BNC(m) Cable, 122 cm p/n 8120-1840

Procedure

1. Connect the test equipment as shown in Figure 2-1. For testing the 4294A with Option

1D5, connect a BNC(m)-BNC(m) cable between the EXT REF Input connector and the

REF OVEN connector on the analyzer rear panel.

NOTE If testing the 4294A without Option 1D5, the frequency standard is not required.