Dakota Ultrasonics
14
3.11 DAC – Menu
DAC:
Toggles the DAC feature on/off/audible. A Distance Amplitude Correction
(DAC) curve is used to configure a variable threshold for the gate, using the same
size reflector at different distances. Refer to page 61 for further info.
DRAW:
Toggles the DRAW mode on/off/audible, and used to draw the DAC curve.
Note: TCG curve cannot be drawn in RF view. Refer to page 61 for further info.
MEAS:
Toggles the units displayed as a relationship of either the signal amplitude
and DAC curve, or just the signal according to screen height. The units are as:
%FSH, %DAC, and dB. Refer to page 61 for further info.
CURVE:
Selectable signal or multi DAC curve options. The displayed curve options
are: DAC, -2dB, -6dB, -10dB, (-6dB/-12dB), (-6dB/-14dB). Once the DAC curve has
been generated, these options can be toggled at any time. Refer to page 61 for
further info.
TRIGGER CURVE:
Used to set the alarm threshold for the DAC curve. The options
are; at DAC, -2dB, -6dB, -10dB, -12dB, -14dB, or using an independent gate. The list
of trigger options will change according to which CURVE option has been selected.
Refer to page 61 for further info.
DPOLARITY:
Used to select the polarity of the DAC curves generated, either
positive or negative. Refer to page 61 for further info.
FIT:
This feature allows the user to select the kind of curve (fit) to use. There are
two options; linear and spline. The linear fit uses a linear line to connect between
each pair of calibrated points, while the spline fit uses a smooth proportional curve to
connect all the calibrated points. Refer to page 63 for further info.
3.12 DGS – Menu
DGS:
Toggles the DGS feature on/off. Distance Gain Size (DGS) curve is used to
configure a variable threshold for the gate using a single reflector using an empirically
derived set of curves. Refer to page 72 for further info.
