Service Guide 3-25
8719ET/20ET/22ET Adjustments and Correction Constants
8719ES/20ES/22ES Power Linearity Adjustment
RF Network Analyzers
5. To switch on the power DAC, press
.
• For the 8719ET/ES or 8720ET/ES, press .
• For the 8722ET/ES, press .
6. Adjust the front panel knob until the mean value is equal to “P2”. Record the “MAIN
POWER DAC” number.
(Example: Power DAC# = 461)
7. To switch off the power DAC, press .
8. Press .
9. Divide the previously recorded DAC number by 256.
(Example: 461/256)
10.To store the quotient, press the following:
Enter the quotient and then press .
(Example quotient = 1)
11.To store the remainder by press the following:
Enter the remainder and then press .
(Example remainder = 205)
12.Press .
13.Press . Verify that the mean is equal to the “P2” value.
Adjusting the Power Linearity
1. Press and enter the power level that is listed as “P3” in Table 3-4.
Press .
2. Press and enter the power level that is listed as “P2” in Table 3-4,
then press .
System
258 x1
459
Save/Recall
System
1619001442 x1
x1
Preset
Save/Recall
Power
x1 Cal
Power
x1
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