Operating instructions HLE 500/5000
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MAN_HLE500_HLE5000_eng_02
3.3.2 Setting the gain
The amplification of the microphone signal, the gain, is set
via the two soft keys, bottom right (see fig. 10). The gain is
shown via a horizontal bar. On top of this bar the gain values
of 1 to 8 can be seen.
Fig 10 :
Setting the gain
To start a measurement, medium gain e.g. 3-4 should be
selected.
Changing the gain affects the level bar and the volume in the
headphones.
3.4
The amplification display
The bar display (fig. 11) shows both the current value of the
sound picked up and the amplified sound.
The lower, thicker bar shows the minimum value of the
measurement. When considering the nature of a leak sound,
which is a continuous noise, the display of this value provides
a much better result and is much less susceptible to pulses of
interference. This minimum value is recalculated after the
mute button has been pushed.
