Service Guide 3-27
8719ET/20ET/22ET Adjustments and Correction Constants
8719ES/20ES/22ES Power Linearity Adjustment
RF Network Analyzers
For 8722ET/ES Models:
Press .
Press and enter the power level that is listed as “P2” in Table 3-4.
Press .
14.Press and enter the power level that is listed as “P2” in Table 3-4,
then press .
15.Press and enter the value listed as “P2” in Table 3-4
and then press .
The displayed trace should be centered on the reference (±0.5 dB).
• If the trace is not centered on the reference, continue with the next step.
• If the trace is centered on the reference, go to “Low Band Adjustment” on page 3-28.
16.To switch on the power DAC, press the following:
17.Adjust the front panel knob until the mean value is P1. Record the “MAIN POWER
DAC” number.
18.To switch off the power DAC, press .
19.Press .
20.Divide the previously recorded DAC number by 256.
21.To store the quotient, press the following:
Enter the quotient and then press .
22.To store the remainder, press the following:
Enter the remainder and then press .
23.Press .
24.Press and verify the mean value is equal to “P1.”
Stop 20 G/n
Power
x1 Cal
Power
x1
Scale Ref
x1
System
2580 x1
Save/Recall
System
x1
x1
Preset
Save/Recall
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