Calibration /Adjustment Procedure
After installing the Phase-Lock assembly, perform the frequency
adjustment procedure (CAL:SETup 86) on page 69 in the Agilent
33120A Service Guide. Be sure to make the 10 MHz frequency
measurement with an accuracy of at least 8 digits (0.01 ppm). It may
be necessary to perform up to three iterations of the frequency
adjustment following the initial installation of the Phase-Lock assembly.
Installation of the Phase-Lock assembly requires that you perform
only the frequency adjustment (CAL:SETup 86) as outlined above,
no further calibration steps are required.
For complete details on performing a calibration, see chapter 4 in
the Agilent 33120A Service Guide.
If you intend to perform an entire calibration at the time you install the
Phase-Lock assembly or in the future, CAL:SETup 86 should replace
CAL:SETup 00 as the first step. You will have to manually change from
setup 00 to setup 86 for this. With “SETUP ^00” displayed on the front
panel, press the “Enter Number” key, the “8” key, the “6” key, and then
press the “Enter” key.
Note that while the instrument automatically steps through setup
numbers as you perform calibration steps, it does not automatically step
from setup 86 to setup 01 (the next calibration step). Therefore, after
performing the frequency calibration adjustment, the instrument will
display “SETUP ^86”. At this point, press the “Enter Number” key,
the “0” key, the “1” key, and then press the “Enter” key. This will return
you to the normal setup sequence starting with “SETUP ^01”.
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