HP 8590 EM 1.10 MHz Reference Output A ccuracy, HP 8590 EM-Series

1.10 MHz Reference Output A ccuracy, HP 8590 EM-Series

If your instrument is equipped with a Precision Frequency Reference, perform \10 MHz Precision Frequency Reference Output Accuracy," instead.

This performance veri￿cation test must be performed with the EMC analyzer set in the spectrum analyzer mode.

The settability is measured by changing the setting of the digital-to-analog converter (DAC) which controls the frequency of the timebase. The frequency di￿erence per DAC step is calculated and compared to the speci￿cation.

The related adjustment for this performance veri￿cation test is the \10 MHz Reference, HP 8590 EM-Series".

Equipment Required

Microwave frequency counter

Frequency standard

Cable, BNC, 122 cm (48 in) (2 required)

Figure 2-1. 10 MHz Reference Output Accuracy Test Setup

Procedure

The test results will be invalid if REF UNLK is displayed at any time during this test. REF UNLK will be displayed if the internal reference oscillator is unlocked from the 10 MHz reference. A REF UNLK might occur if there is a hardware failure or if the jumper between 10 MHz REF OUTPUT and EXT REF IN on the rear panel is removed.

2-2 Performance Veri￿cation Tests