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To make it possible for the machine to calculate the field strength, set the
unit to
dBµV/m or dBW/m2 and set the antenna gain correctly. The calculated
field strength would be displayed on the top right corner.
3.2.6 Level Tone
Level tone function means vocalising the signal level. In other words, the
higher the tone, the higher the level reading is.
However, the varying range of the level might be huge (140dB or more).
Mapping tone to such an large interval can barely reflect any detail. Thus the
range must be narrowed and KC908 comes with a range of 80dB. After
enabling this function, a proper central point of the level must be selected
and set. As level changes within the interval of 40dB below/above central
point, tone will change noticeably as well. When the level is more than 40dB
below central point, there will barely be any change in the tone. If the level is
more than 40dB higher than the central point, the sound would become
intermittent. Higher it becomes, the more rapid the tone becomes, to warn the
user adopt a higher central point. Intermittent notification offers another 20dB
range.
Pic: In searching-on-foot scenario, setting the central point on the current
reading level would be helpful to hear the change.
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