In Case Of Difficulty - Agilent Technologies 8719ET Service Manual

8719ET/20ET/22ET
8719ES/20ES/22ES
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 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.
Service Guide
Figure 3-10.
Adjustments and Correction Constants
Frequency Accuracy Adjustment
3- 43