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2074
User Manual
Reference
Oscillators
Adjustments
7-6
Calibrations are marked with numbers from 1 to 50 and, except the
(50M) and 10M adjustments in the Selection group, should be carried
out exactly in the order as numbered on the panel. There are separate
adjustments for Channels 1, 2, 3 and 4 so make sure that the output
cables are connected to the appropriate channel during the
adjustments.
The numbers that are associated with each adjustment are identified
as Setup Number at the title of each of the adjustments in the
following procedure.
Remote adjustments have the range of 1 through 256 with the center
alignment set to 128. Therefore, if you are not sure of the direction, set
the adjustment to 128 and add or subtract from this value. If you have
reached 1 or 256 and were not able to calibrate the range, there is
either a problem with the way you measure the parameter or possibly
there is a problem with the instrument. In either case, do not leave any
adjustment in its extreme setting but center the adjustment and
contact your nearest service center for clarifications and support.
Note in the following procedures that although configuration of the
2074 is done automatically, some of the configuration is shown for
reference. There is no requirement to change configuration of the
2074 during the remote adjustment procedure except in places where
specifically noted.
Use this procedure to adjust the reference oscillators. The reference
oscillators determine the accuracy of the output frequency so if you
suspect that there is an accuracy issue, proceed with the calibration of
the reference oscillators
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