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AD8000 Series Spectrum Analyzer Instruction
Manual
System Calibration
9.1
System calibration needs to be done frequently for the electronic
measurement instrument. After a period of using, system calibration
should be done. If the environment such as temperature changes
dramatically, or users do not think the result reliable, system calibration
also needs to be done.
System calibration includes frequency calibration and amplitude calibration.
Frequency calibration is to correct the frequency error caused by IF filter
which bandwidths in every IF filter should be calibrated. Amplitude
calibration is more complicated. The cause for amplitude error might be
reference level. Therefore, for different filter bandwidth, attenuator and
reference level should both be calibrated.
To calibrate the system, please process as following steps: A
Press "CAl" soft-key in the first page of system menu, and the menu of 5-3
will pop up.
Attention: please do not do any operation before the calibration
completing.
The second and third buttons of the menu indicate 'Use/Cancel' calibration
data or frequency response data separately. There two corrections could
be canceled and then turned on one or both when needed. The frequency
Fig. 9-4 Calibration Menu
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