Alc Power Level Accuracy - Agilent Technologies 83620A Service Manual

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13. ALC Power Level Accuracy

Description and Procedure
his adjustment sets the absolute power accuracy in each frequency band at
a CW frequency. he digital ALC calibration array is loaded with zeros for
the 0 dB attenuator setting to eliminate any power o set from this source.
Calibration constants set the power accuracy at four power levels.
A potentiometer sets the power accuracy at an 18 dBm level in the low band
(not applicable for all models).
his adjustment procedure zeros the digital ALC calibration
Note
array at the 0 dB attenuator setting. he \Power Flatness"
adjustment must be performed after this procedure.
1. Preset the equipment shown in Figure 3-24 and let them warm up for at
least one hour. Do
OU PU yet.
Figure 3-24. ALC Power Level Accuracy Adjustment etup
HP 8360
connect the power sensor to the synthesizer RF
not
ALC Power Level Accuracy
Adjustments 3-91