Service Guide 3-29
8719ET/20ET/22ET Adjustments and Correction Constants
8719ES/20ES/22ES Power Linearity Adjustment
RF Network Analyzers
3. Connect the cable to PORT 2 (TRANSMISSION Port on ET models) and press the
following:
4. Press , and enter the power level from “Power B” in Table 3-5, then press .
5. Adjust A59R4 until the minimum value of the trace on the display equals “Power C” in
Table 3-5. For the location of A59R4, see Figure 3-3 on page 3-19.
6. If no more correction constant routines are going to be performed, return the A7 switch
to the NRM position and perform the “EEPROM Backup Disk Procedure,” on page 3-33.
In Case of Difficulty
• If the analyzer fails the “Power Linearity Performance Test” do the following:
— If the analyzer fails the performance test for the power levels listed as P2, P3, repeat
the "Power Linearity Adjustment," on page 3-24
— If the analyzer fails the performance test for the power level listed as P2, repeat the
"Output Power Adjustments," on page 3-17 and the "Power Linearity Adjustment,"
on page 3-24.
• If the analyzer is still not passing the “Power Linearity Performance Test,” check for
available power and modulator functionality by adjusting the power DAC from 0 to
4095 (refer to the “Output Power Adjustments” procedure).
The power should vary from −20 dB to +4 dB from the maximum specified power in
most cases. (At some of the frequencies you may not be able to tune above maximum
power.)
— If the analyzer is operating correctly, as indicated from the results of the previous
step, repeat the “Output Power Adjustments” procedure.
— If the analyzer is not operating correctly, as indicated from the results of the previous
step, refer to Chapter 7 , “Source Troubleshooting,” or contact the nearest Agilent
Technologies sales or service office.
Cal
Meas
Power x1
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