Basics 35, Temperature dependent calibration – Teledyne LeCroy HDO 4000 Getting Started Guide User Manual

Page 39

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923010-00 Rev A

BASICS

35

Temperature Dependent Calibration

The HDO4000 is calibrated at the factory prior to being shipped. This calibration is run at 23° C (± 2° C) and is valid for temperatures ± 5° C of the
original calibration temperature. Within this temperature range the HDO4000 will meet all of the specifications. When the oscilloscope is used outside
of this temperature range a temperature dependent calibration is recommended. There are two options for this calibration: Calibrate All or Calibrate
Current Setting.

Calibrate All - All possible combinations of vertical and horizontal settings are calibrated at the current temperature. This calibration is valid for the
current temperature ± 5° C. This calibration takes about 50 minutes.

Calibrate Current Setting - The oscilloscope is calibrated at the current vertical and horizontal setting. This calibration is valid for this setting for the
current temperature ± 5° C. This calibration takes under 30 seconds.

It is recommended that the HDO4000 be calibrated when the temperature range is outside of the ± 5° C of the original calibration temperature or
when it has been more than 1 month since the previous calibration.

It is recommended that the HDO4000 be warmed up for at least 20 minutes prior to use. During the HDO4000 warm-up period, the oscilloscope will
automatically initiate calibrations to ensure that the HDO4000 is always calibrated.

It is required that all inputs be removed from the oscilloscope prior to performing calibration.

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