Agilent Technologies 35670-90066 manual Calibration Error Messages

Models: 35670-90066

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Calibration Error Messages

Agilent 35670A

Internal Test Descriptions


Calibration Routine Description

Calibration Error Messages

The dc-offset tables and frequency correction curves produced by the calibration routine are compared with a set of maximum allowable error curves. The Quick Confidence self test runs the calibration routine and places error messages in the Test Log if any measurement exceeds the maximum allowable error. To run the Quick Confidence self test press the following keys:

[ System Utility ]



The following lists the possible error messages:

Quick Confidence failure information:


Channel X 0 dB freq


Channel X 20 dB freq


Channel X 40 dB freq


Channel X step attenuator


Channel X –12 dB pad


Channel X +14 dB pad


Quick Confidence


Where X = 1, 2, 3, or 4 and freq = 100k, 50k, or 25k

Viewing the Calibration Correction Curves

The calibration correction curves can be viewed for any input range or frequency span. However, there is no frequency correction if the anti-alias filter is bypassed or if the A-weight filter is on. When there is no frequency correction, the calibration curve is a flat 0 dB line.

You can save the calibration trace to a data register only when in FFT analysis or correlation analysis instrument mode. However, these data registers can be displayed in any instrument mode.

The following key sequence shows how to view the calibration correction curves for channel 1 and 2 at a 1 Vrms range setting, full span. Other curves can be displayed by changing the input range and frequency span.


Page 389
Image 389
Agilent Technologies 35670-90066 manual Calibration Error Messages, Viewing the Calibration Correction Curves