Teledyne LeCroy HDO 4000 Getting Started Guide - Manual (Page 39)

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.