106 Options List
C.2 Option 01: Backlighted LCD Display
C.2.1 General Description – 1084B/C Only
Option 01 for the Arbiter System line of Satellite-Controlled Clocks adds illumination to the front
panel display, if so equipped. The standard reflective liquid crystal display (LCD) is replaced with
a transflective LCD. An Electro-luminescent (EL) panel located behind the transflective LCD pro-
vides backlighting; thereby increasing the readability of the display in subdued lighting conditions.
The backlight can be set to remain on indefinitely, or to turn off after a predetermined time fol-
lowing the last keystroke. With the backlight turned off, the display is still readable in ordinary
ambient light.
C.2.2 Specifications
• Initial Luminance: 30 cd/m
2
minimum
• Service Life: 4000 hours (down to 10 cd/m
2
)
C.2.3 Configuration
The SETUP menu outlined in the Operation Manual contains a sub-menu, which allows selection
of the backlight-operating mode. To set the backlight-operating mode, observe the following steps:
1. With the clock power turned on, press the SETUP key. The display should change to read,
SET RS-232.
2. Press the SETUP key repeatedly, until the display reads, “SET BACK LIGHT?”. Press the
ENTER key to select the backlight sub-menu. The current backlight operating mode will be
displayed, from one of the following selections:
• OFF – Backlight never on.
• ON – Backlight always on.
• AUTO – Backlight turns on when a key is pressed, remains on for 30 seconds after the
last key is pressed. This is the preferred mode for applications requiring a lighted display,
since it will provide the longest EL panel lifespan (see Specifications, above).
3. Pressing the UP and DOWN keys will change the selection. When the desired operating
mode is displayed, press the ENTER key to confirm the choice and return to the first level
of the SETUP menu.
The backlight operating mode can also be changed via the RS-232C port, using the L0, L1, or L2
commands for OFF, ON, and AUTO, respectively. For details regarding this and other capabilities
of the RS-232C port, refer to Appendix A, page 76.
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