McIDAS-X Learning Guide
Version 2020

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Loop Control System - Changing the Dwell Rate

In this exercise, you will use the DR command to change the dwell rate, which is the amount of time each frame is displayed during automatic looping. Each frame can have a unique dwell rate assigned by DR.
  1. Check the dwell rates.
    Type:  DR
    The default dwell rate is nine units for the first frame and six units for the remaining frames.

  2. Start the loop.
    Press:  Alt L
  3. Change the dwell rate to two units.
    Type:  DR 2
    The images continue looping, but at a faster rate. Each frame in the loop is displayed for two units.

  4. Change the dwell rate to 20 units.
    Type:  DR 20
    Each frame in the loop bounds is displayed for 20 units.

  5. Set the dwell rate to a variety of values.
    Type:  DR 2 10 20
    The first frame is set to two units, the second frame to 10 units, and the third frame to 20 units.

  6. Stop the loop.
    Press:  Alt L
  7. Change the dwell rate to its initialized value.
    Type:  DR INI
    The dwell rate should be nine units for the first frame and six units for the remaining frames.

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