10 Mhz Out Frequency Reference Accuracy; Test Description; Test Specification; Related Adjustment - Keysight NFA Series Performance Verification And Calibration Manual

Test Descriptions

10 MHz Out Frequency Reference Accuracy

10 MHz Out Frequency Reference Accuracy

Test Description

The test applies to NFAs with either the standard 10 MHz frequency
reference or 10 MHz precision frequency reference (Option 1D5).
The test measures both the frequency reference accuracy and the ability
to set the timebase. The frequency reference accuracy is measured with
the NFA's 10 MHz REF OUT connected to the frequency counter's
Channel A input. A cesium beam frequency standard, or some other
10 MHz ± "house standard" provides the frequency reference for the
frequency counter. The timebase to be set is measured by changing the
setting of the digital-to-analog converter (DAC) which controls the
frequency of the timebase. The frequency difference over the range of
DAC settings is calculated and compared to the specification.

Test Specification

Ageing Rate
Settability
Temperature Stability

Related Adjustment

10 MHz Frequency Reference Adjustment (see page 18).
12
Standard
< ±2 ppm/year
< ±0.5 ppm
< ±6 ppm
Option 1D5
< ±1 ppm/year
< ±0.01 ppm
< ±0.01 ppm
Chapter 2