Sperry Marine 5016-CA, Operation, Installaion And Service Manual

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056376/A Analogue Compass Repeaters
6-12 Dimming Values
6.4 Dimming Values
The illumination intensities at the repeater’s eight discrete brightness
levels are factory preset to provide a useful range of levels under most
lighting conditions, both at day and night.
However, to permit an optimum adaptation of the repeater to local light-
ing conditions, a configurable dimming value table is maintained in the
on-board memory.
For each brightness level (“dimming step”), the table holds a set of four
dimming values. These represent the illumination intensity for the card
backlight (“PCB”), the source indicators (“Status”), the
DIM
keys and the
error indicator.
Figure 6-2:
Repeater application
main page:
dimming values
Adjusting Dimming Values
The analogue repeater’s dimming values are preset to factory defaults
which should be suitable without further adjustment in most cases.
However, in certain situations, e.g. on an open deck or under subdued
lighting, a more useful range of brightness levels may be obtained if the
dimming values are altered.
To alter dimming values, edit the table entries directly or use the spin
controls to set them to the required values.
Each table entry may take any value between 0 (off) and 1000 (maximum
brightness). Due to the nonlinear brightness perception of the human
eye, it will be required to gradually increase the difference in value from
step to step in order to achieve even graduation of the brightness levels.
Alterations of the dimming values are transferred to the repeater imme-
diately. This permits to directly observe the result of changes at the cur-
rently active brightness level.
Note
Do not set the error indicator’s intensity to “0” at any dimming step.
This would disable the indicator at the respective step.