User Manual

LC 1200 Manual The LC unit 2-9
Adjusting the Tx Activation Field
The Tx Activation Field can be reduced or
expanded to match each unique zone’s needs.
Each monitored zone may have circumstances
that require an adjustment to the range of the Tx
Activation Field. The most common reason is
that the Field is overlapping or “bleeding” into
other areas.
IMPORTANT:
A Tamper alarm will be generated when you
remove the LC unit cover or if you remove
power from the unit (and a 9V NiCAD
battery is installed) a Power Loss Supervisor
alarm will be generated.
To adjust the range of the Tx Activation Field,
refer to Figure 2.6 and use the following
instructions:
1. Notify staff and security that you will be
adjusting the zone and they will need to
pay special attention to area traffic
during this time.
2. Open the LC unit cover by removing the
two spanner screws. A Tamper alarm
will be generated.
3. Silence the Tamper alarm by removing
jumper JP2 (Tone Enable).
4. Slowly adjust potentiometer R4 (Tx
Gain) on the LC unit. Turn
counterclockwise to reduce the range of
the Field (LED1 is dim), turn clockwise
to expand the range of the Field (LED1
is bright).
5. As you adjust, use a Tag to test the
range of the Field to ensure there is
adequate coverage for the zone.
6. Replace jumper JP2 and the LC cover
with spanner screws.
7. Reset the zone by entering a valid code
into the zone Keypad.