RIDGID SeekTech SR-20 Operator's Manual page 26

SeekTech SR-20
Figure 39 – No Signal Icon
Center Signal Strength Option
Selecting this option in the Menu Selection screen will
force the number representing Signal Strength to be
displayed in the center of the display area anytime
when a Proximity Signal is not available (Figure 40). This
may occur when signal is weak, or when filtering by
the Proximity Threshold control is on. When a Proximity
Signal again becomes available, the Signal Strength
number returns to the lower right corner of the screen as
usual. (Line Trace Mode only).
Figure 40 – Display of Signal Strength at Screen Center
Proximity Threshold Control
The threshold for Proximity detection in the SR-20 can be
adjusted. This helps to constrain the locating to a certain
range from the instrument. The SR-20 compares the
Measured Depth reading to the selected Proximity
Threshold level and determines whether or not to display
a Proximity Signal. If the Measured Depth of the target is
greater than the user-selected threshold value, the
Proximity Signal will read zero. If the Measured Depth is
less than the threshold that has been set, the SR-20 will
display a Proximity Signal value. (Line Trace Mode only.)
24
Figure 41 – Proximity Threshold Control
When it is activated, the Proximity Threshold is con-
trolled by a long press (greater than 1/2 second) on
the Up Key to set a higher threshold, or by the Down Key
to lower the threshold.
The settings on the Proximity Threshold control the
depth thresholding of the Proximity Signal as follows.
(Lowest) Signal Strength mode. Moves Signal Strength
to screen center, map display suppressed, allows neg-
ative depth to display. Audio signal reflects Signal
Strength.
3' (1m) Displays Proximity Threshold for detections
where Measured Depth is three feet (1m) or less.
10' (3m) Displays Proximity Threshold for detections
where Measured Depth is ten feet (3m) or less.
33' (10m) Displays Proximity Threshold for detections
where Measured Depth is thirty feet (10m) or less
(Default setting).
99' (30m) Displays Proximity Threshold for detections
where Measured Depth is 99 feet (30m) or less.
(Highest) Wide-open Proximity Mode. No threshold,
no suppression, allows negative depth display.
The Proximity Threshold Control is particularly valuable
if you need to eliminate signals from outside a well-de-
fined distance for clarity.
Signal Focus Control
The Signal Focus Control feature essentially acts some-
thing like a magnifying glass on the signal. It reduces the
sample bandwidth of the signal that the receiver exam-
ines, and gives a display based on a more sensitive
read of the incoming signals. The tradeoff in using the
Signal Focus Control setting is that the display, while
more precise, will update more slowly. The Signal Focus
Control can be set at 4Hz (wide), 2Hz, 1Hz, .5 Hz, and
.25 Hz (narrow). The narrower the selected bandwidth
used, the greater detection distance and precision the re-
ceiver will show, but with a lower update rate of data on
the display.
Ridge Tool Company
Proximity
Threshold
Control