Service Guide 3-43
8719ET/20ET/22ET Adjustments and Correction Constants
8719ES/20ES/22ES Frequency Accuracy Adjustment
RF Network Analyzers
NOTE To increase the accuracy of this adjustment, steps 5 and 6 are recommended.
5. Replace the instrument covers and wait 15 minutes to allow the analyzer to reach its
precise operating temperature.
6. Recheck the CW frequency and adjust if necessary.
Instruments with Option 1D5 Only
7. Reconnect the BNC to BNC jumper between the “EXT REF” and the “10 MHz Precision
Reference” as shown in Figure 3-10.
Figure 3-10 High Stability Frequency Adjustment Location
8. Insert a narrow screwdriver and adjust the high-stability frequency reference
potentiometer for a CW frequency measurement within specification.
In Case of Difficulty
• If you cannot adjust the CW frequency within specification, replace the Reference (A12)
assembly or contact the nearest Agilent Technologies sales or service office.