3-26 Service Guide
Adjustments and Correction Constants 8719ET/20ET/22ET
Power Linearity Adjustment 8719ES/20ES/22ES
RF Network Analyzers
3. 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 “Entering the Power Levels.”
4. To switch on the power DAC, press the following:
5. Adjust the front panel knob until the mean value is P2. Record the “MAIN POWER
DAC” number.
6. To switch off the power DAC, press .
7. Press .
8. Divide the previously recorded DAC number by 256.
9. To store the quotient, press the following:
Enter the quotient and then press .
10.To store the remainder, press the following:
Enter the remainder and then press .
11.Press .
12.Press and verify the mean value is equal to “P2.”
Entering the Power Levels
13.Enter the Power levels.
For 8719ET/ES and 8720ET/ES Models:
Press and enter the power level that is listed as “P2” in Table 3-4.
Press .
Scale Ref
x1
System
2580 x1
Save/Recall
System
x1
x1
x1
Preset
Save/Recall
Power
x1 Cal
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