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Publication No. 980938 Rev. K
Model T940 User Manual
Astronics Test Systems
Programmable Channel Calibration 6-23
IAL/IAH
For DR3E, DR9 and UR14 only, the
IAL/IAH
calibration calculates the offset and
gain of the over current alarm levels. The Verify button is available for use both
before and after calibration. It is recommended that the calibration be verified
before the Update button is used to store the current drive high and drive low
calibration factors. The Export button can be used to save the calibration factors
into a text file for examination and later restore, e.g., File | Load DRA Calibration.
Select Calibrate Function
Equipment: Basic Setup
Procedure:
1. Place a check mark next the IAL/IAH
menu item on the Calibrate
Function menu.
2. Verify that the ISource/ISink
calibrate function is now in focus.
Select Start and End Channels and Measurement Delay
Equipment: Basic Setup
Procedure:
1. Select DRA or DRB (if installed) using the Driver/Receiver switch.
2. Use the Start and End Channel fields to select the I/O and Auxiliary
channels to be calibrated.
3. The default measurement delay is 100 ms. Increase this value to give
the calibration points more time to settle.