Agilent Technologies NFA Series, Performance Verification And Calibration Manual

Page: 62 / 184

50 Chapter 2
Test Descriptions
Frequency Accuracy
Step 6. Use Cells D1 to D201 as a look up reference and find the cell, which closest
matches the ½ Power Reading in cell D202.
The corresponding frequency in Column A is given as the center frequency point.
Enter the reading into the appropriate column in the Test Record. Ensure that the
measured value meets its published specification.
Performing the frequency accuracy calculations manually
Step 1. Using the displayed P
hot
results sum the values and enter the summed values on the
Test Worksheet Table on page 45.
Example 2-2 1 GHz CW at the 4 MHz bandwidth
For the 1 GHz CW at the 4 MHz bandwidth each Phot reading shown in the Figure
2-12 on page 51 is summed with the previous cell(s) until the total power under the
curve is equated in the lower right hand column. Example sum reading 1 to reading
6 = 0.369.
Figure 2-11 Displayed Table Values