GE Ultrasonic USM Go, Руководство оператора

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Chapter 3. Making Measurements
USM Go Operator’s Manual 85
3.8.1 Recording the DAC Curve (cont.)
Note:
If the Gate Detection Mode is set to PEAK , after the first DAC reference point is stored, two measurement result boxes are
automatically set, if not already configured, to display SA and A%A values.
4. Repeat steps 2 and 3 to record additional DAC Curve points, up to a maximum of 16 points. A minimum of two DAC Curve points are
required to define the curve.
5. After entering all of your points, press the center of the joystick ( ) to deactivate the function. The TCG/DAC data is stored, using
the amplitude of the earliest
TOF
as the reference amplitude.
6. In the SETUP menu, activate the DAC TYPE function using the joystick ( ). Then, select one of the following options:
•
STRAIGHT:
The DAC curve is displayed as a series of straight line segments that join the stored DAC points.
•
CURVED:
The DAC curve is displayed as a curved line that is linear in gain, based on the stored DAC points.
Note:
DAC curve points and status are stored with a data set. When recalled, the curve status is the same as when it was stored.