Automatically Calibrating the Signal Processor

The Zauto utility can automatically calibrate the signal processor output, from either:

  • Zauto utility

    If you perform the automatic calibration from the utility, Zauto plots each point on the graph and draws the least squares fit and noise sample lines on the display.

  • Command line

    If you perform the calibration from the command line, Zauto displays a series of messages indicating each siggen setting and DSP value.

In both cases, the new slope is calibrated, and the results are saved in the calibration file.

Zauto uses the reference information from the calibration file to determine whether to accept the new calibration information. If the new calibration deviates too much from the reference settings, it is not used. This prevents loss of data if the signal generator should fail.

note You can change the reference calibration information with the Zcal utility.
  1. Select Zauto > Config.

    The AutoCal Config menu appears.

  2. In the AutoCal Config menu, choose the pulse width for the calibration, the siggen (signal generator) step, and other calibration parameters.
  3. Use the Slope Tolerance % and the dBZo Tolerance % fields to define the permitted deviation between the reference information and the new calibration.

    A higher percentage allows for a larger deviation, with 100% allowing any results to replace the old calibration values.

  4. Select Save Config.