Agilent Technologies 35670-90066 manual Calibration Routine Description

Agilent 35670A	Internal Test Descriptions
	Calibration Routine Description

Calibration Routine Description

The calibration routine consists of a dc-offset calibration and a frequency calibration. The calibration routine occurs immediately following the power-on tests and periodically afterwards to compensate for any drift. The calibration routine sets the input relays to disconnect the internal circuitry from the BNC center conductor and shell, and connect the source (via CALP) to the input channels. Measurements are then taken using several input paths to produce correction curves for all input ranges. If calibration fails, the calibration routine is repeated up to two more times. Each time calibration fails, a calibration failure message is added to the fault log. If calibration fails all three times, a calibration failure message is displayed on the screen.

If you abort a self test before the self test is finished, the analyzer may fail its calibration routine. To prevent this from happening, press [ Preset ] [ DO PRESET ] or cycle power after you abort a self test.

To manually start the calibration routine, press the [ System Utility ] [ CALIBRATN ] [ SINGLE CAL ].

To prevent the calibration routine from occurring, set the power switch to on ( l ), then as soon as Booting System appears on the display, press and hold in the

[ Preset ] key until Autorange in progress appears. This not only prevents the calibration routine from occurring but also bypasses the auto start file if one exists.

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