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Chapter 2. Instrument Setup
USM Go Operator’s Manual
47
2.4.8 Selecting a Rectification Mode
Rectification effects the orientation of the A-scan on the display screen. The A-scan represents the sound pulse (i.e. echo) that is returned to
the instrument from the material being tested. The series of echoes looks like the
Radio Frequency (RF)
signal shown in
Figure 12
below.
Note that the RF signal has both a negative component below the axis and a positive component above the axis. In RF mode, Gate A and
Gate B can be positioned either above or below the axis, to be triggered by either a positive-heading echo or a negative-heading echo.
Figure 12: Typical RF and Rectified Signals
Summary of Contents for Ultrasonic USM Go
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