GE LOGIQ E9 User Manual page 113

TAMAX and TAMEAN
Manual Trace
Auto Trace
NOTE:
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LOGIQ E9 User Guide
Direction 5454884-100 English Rev. 1
The value measured depends upon the Vol Flow Method preset.
The two selections available are: Peak (TAMAX) and Mean
(TAMEAN).
To do a manual trace of TAMAX or TAMEAN:
1. Press Measure. Press the top Trackball key to select
Trace; a caliper displays. Select Manual on the Touch
Panel.
2. To position the caliper at the trace start point, move the
Trackball.
3. To fix the start point, press Set.
4. To trace the velocity spectrum boundary, move the
Trackball.
NOTE: To edit the trace line, move the Trackball.
5. To complete the measurement, press Set. The system
displays the measurement values in the Results Window.
The value measured depends upon the Vol Flow Method preset.
The two selections available are: Peak (TAMAX) and Mean
(TAMEAN).
To auto trace TAMAX:
1. Press Measure. Press the top Trackball key to select
Trace; an active caliper with a vertical dotted line displays.
Select Auto on the Touch Panel.
2. To position the caliper at the trace start point in the Doppler
spectrum, move the Trackball.
3. To fix the start point, press Set.
4. To position the vertical caliper at the end point, move the
Trackball.
5. To complete the measurement, press Set. The system
automatically fixes both calipers and traces the maximum
value between the two points. The system displays this
value in the Results Window.
When you set the Auto Trace for Both (above and below),
the system picks up the maximum power of the signal, NOT
the maximum velocity. If the maximum velocity is not the
maximum power, the system may not trace accurately. If
you want to use maximum velocity, select either Above or
Below.
Measurement and Analysis
2-27