HP ESA-L1500A, User'S And Calibration Manual

Page: 193 / 326

192 Chapter 9
Performance Verification Tests
1. 10 MHz Reference Accuracy
1. 10 MHz Reference Accuracy
The settability is measured by changing the setting of the
digital-to-analog converter (DAC) which controls the frequency of the
timebase. The frequency difference per DAC step is calculated and
compared to the specification.
The related adjustment for this performance verification test is the
“10 MHz Frequency Reference Adjustment.”
Equipment Required
Universal counter (Instructions are for HP 53132A. For HP 5316B,
refer to its user documentation.)
Frequency standard
Cable, BNC, 122-cm (48-in) (2 required)
Figure 9-1 10 MHz Reference Test Setup
Procedure
1. Connect the equipment as shown in Figure 9-1 . The frequency
standard provides the reference for the universal counter.
2. Ensure that the analyzer has been on for at least five minutes before
proceeding.
3. Set the frequency counter controls as follows:
a. Press
Gate & ExtArm
b. Press any one of the arrow keys until DIGITS is displayed.
c. Press
Gate & ExtArm
again. Using the arrow keys, set the DIGITS
number to 9.