Technical Manual

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1. Press and hold the keypad AREA ( ) button until "LF"
appears in the Window.
2. Press "0" and all keypad icons will briefly turn on at the
same time (this is a test of the Window display).
3. Press ENTER.
All signal strength readings in this function are expressed in
dBm units (signal level relative to 1 milliwatt), provided for
those more familiar with signal readings expressed using
standard radio communication terminology. Normally, dBm
units are expressed in negative numbers, but this keypad
omits the minus ("–") sign and only displays the two right
digits. Therefore, with this keypad only, a "lower" number
reflects a stronger signal. For example, a reading of "30" is
stronger ("better") than "55". If the reading is -102dBm, the
keypad will display the two right digits ("02"). If the reading
is -99dBm, "99" will be displayed. Numbers in dBm scale
are from -30dbm to -105dbm, with -30dbm as the strongest
reading. Note: Unless otherwise noted, all readings dis-
played in this function reflect the latest sample readings that
were automatically retrieved by the keypad every 15
minutes.
The signal strength readings always follow two letters, as
follows:
 FL - The numbers that follow correspond to the weakest
RF signal received by the (LCD) keypad from any device
in the system (FL = "Floor Level").
 LL - Same as the "LL" description in the previous func-
tion, "Walk Test Mode", described earlier in this section.
 OL - In one of several efforts to save keypad battery
power, the sensitivity level of the keypad is adjusted as
needed, depending upon calculations based upon the
"LL" signal (above), and is displayed here for refer-
ence. Depending on the "LL" signal level, if the keypad is
adjudged to be in "close" proximity to its connected Hub
and also to another, separate iSecure system, the key-
pad sensitivity threshold is adjusted to save battery pow-
er, and to also prevent the other, separate iSecure sys-
tem from needlessly waking up the keypad when in an
idle state.
 HL - Same as the "HL" description in the previous func-
tion, "Walk Test Mode", described earlier in this section.
 LP - Similar to "OL", above, this reading exists as a result
of another effort to save keypad battery power. The
transmission level of the keypad is adjusted as needed,
depending upon calculations based upon the "HL" signal
(above), and is displayed here for reference.
 Operating Frequency - Displays the radio operating fre-
quency of the iSecure system, in MHz. For example, a
frequency of 928.75MHz is displayed as "Fr, 92, 87, 50".
Reset Microcontroller
Performing this feature is equivalent to removing the keypad
battery power and then restoring battery power. All keypad
settings are retained.
1. Press and hold the keypad AREA ( ) button until "LF"
appears in the Window.
2. Press RESET, then press ENTER.
Keypad Window Backlight
The keypad face contains a Room Light Sensor that auto-
matically measures the ambient light level to determine if the
keypad Window backlight needs to be turned on for a few
seconds after a keypad button press. A lit backlight ensures
the Window contents are displayed clearly in a dark room.
In a bright room, the backlight is not needed and thus re-
mains off to save battery power.
This Room Light Sensor threshold can be adjusted as well
as enabled/disabled, as described in the Operating Guide
for the ISEC-WL-KEYPAD Wireless Battery-Powered Key-
pad (OI400), in the section "KEYPAD WINDOW BACK-
LIGHT".
ISEC-WL-KEYPAD "Local Functions" (cont'd)