Omega Vehicle Security freedom OM-550 - Manual (Page 8)

OM-550 u 3 u
2.1.1 ACTIVITY LED & HORN
The Activity LED and internal horn provide a quick indication of the unit's status. For
example a short, periodic beep and flash indicates that the OM-550 is “ON” but not
being programmed.
The horn produces two different sounds, a beep and blat. Valid key closures produce
the beep sound and invalid keys produce the blat. For example, the OK key is only
used in programming. Pressing the OK key when not programming will produce a blat
sound.
Figure 2-3
•
A periodic beep-beep and flash-flash indicates that the OM-550 is being
programmed.
•
Key closures override this regular activity with a steady beep (or blat) whenever
a key is pressed.
•
If no activity is evident (beeps and flashes, or printing), the unit is “OFF”.
Menus are printed when a choice is available. Then, when the operator presses a
key the resulting Selection is printed to confirm the action. In most cases, the
user need not wait for a menu to print before making a selection. Experienced
operators can operate the unit very swiftly, with little printing. If the unit blats,
just wait for the menu to print, then continue by pressing the correct key(s).
ACTIVITY LED