Product Manual

5
SECTION III: VISUAL AND AUDIBLE INDICATORS
Gain Level Indicator: The gain range is
indicated by a 4-segment LCD as shown in
Figure 3; L (Low), M (Medium), H (High) and
XH (Extra High). Upon turn on, the gain
defaults to M (Medium). Each press of the UP
or DOWN arrow buttons will cause the gain
level indicator to change accordingly.
Figure 3: Gain Level Indicators
Battery Level Indicator: The battery level is indicated by a 4-segment LCD indicator, as
shown in Figure 4. When all four segments are black the voltage level is between 100% and
75%. As the voltage decreases, the number
of black segments decreases. Battery life
varies with usage and the ambient
temperature. Cold temperatures reduce
battery life. Low temperatures may result in
only two or three segments being black. This
could be temporary and all segments will
change to black as the temperature increases.
Figure 4: Battery Voltage
Status Indicators
Signal Strength and Polarity Indicator: The signal strength, defined as the difference, or
delta (Δ), between the magnetic field detected at the top and bottom sensors, is shown as a
numerical indication in mG (milligauss) units,
preceded by the polarity of the signal (+ or -), and
followed by the Δ symbol, to emphasize that it
represents a “difference” between the two ends of
the sensor array.
In addition, the signal strength is shown in a semi-
circular bar graph, with more bars indicating a
stronger signal. The bar graph will switch to the +
(right) or – (left) side, depending on polarity.
Finally, the signal strength is also indicated by the
frequency of the audio signal, a higher audio
frequency indicates a stronger signal. Figure 5
shows the various visual indications of signal
strength and polarity.
Figure 5: Signal Strength Visual Indicators