Agilent Technologies E1401-90493 1. 10 MHz Reference Output Accuracy

42 Chapter 2

Performance Verification Tests

1. 10 MHz Reference Output Accuracy

The setability is measured by changing the settings of the

digital-to-analog converter (DAC), which controls the frequency of the

timebase. The difference in frequency for each DAC step is calculated

and compared to the specification.

The related adjustment for this performance verification test is the

“10 MHz Reference Frequency Adjustment.”

Equipment Required

Universal counter (Instructions are for Agilent 53132A. For Agilent

5316B, refer to its user documentation.)

Frequency standard

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

Figure 2-1 10 MHz Reference Test Setup

Procedure

1. Connect the equipment as shown in Figure 2-1. The frequency

standard provides the reference for the universal counter.

2. Check that the analyzer is not in external reference mode. If

Ext Ref appears on the screen, the analyzer is in external reference

mode. If the analyzer is in external reference mode, disconnect the

external reference.

3. Ensure that the analyzer has been on and in internal frequency mode

for at least five minutes before proceeding.

4. Set the universal counter controls as follows:

a. Press Gate & ExtArm.

b. Press any one of the arrow keys until TIME is displayed.

c. Press Gate & ExtArm again. Using the arrow keys, set the time to