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Appendix
Intcom Lvl 100
Intercom Level
Sidton Lvl 100
Sidetone Level
Lo Dsp Lvl 0
Low and High Display Levels
Hi Dsp Lvl 50
Intercom Level
This function adjusts the Intercom Audio Level. Turn the Small knob to change the value. The range
is from 0 to 255. Setting the value to 0 slaves the sidetone level to the volume control knob.
Sidetone Level
This function displays and adjusts the sidetone audio level. Turn the Small knob to change the value.
The range is from 0 to 255. Setting the value to 0 slaves the sidetone level to the volume control knob.
Display Brightness
As it arrives from the factory, the SL40 automatically adjusts its display brightness for the current
lighting conditions. A small sensor at the upper left of the display is used for this function. There are
two adjustments available for controlling the brightness level of the display. The first controls the lower
brightness level in the automatic adjustment range (Lo Dsp Lvl). This is the brightness used when in total
darkness. The second adjusts the upper limit of this range (Hi Dsp Lvl). This is used when bright light is
shining on the display.
The factory settings for these are at the limits of the range, 0 (Lo Dsp Lvl) and 50 (Hi Dsp Lvl). The
range can be reduced if desired using the inner knob to adjust the two values.
Some users may wish to disable the automatic dimming function. This can be accomplished by set-
ting the high display level to zero. Now the low level adjustment will set the brightness of the display
directly with no automatic adjustment made based on ambient light.
System Functions