Accutech LC 1200, Manual

Page: 32 / 156

2-10 The LC unit LC 1200 Manual
Stagger Tuning
Stagger Tuning allows monitored zones to be
located closer than the normal minimum 70 feet
distance by using different Tx operating
frequencies for adjacent zones.
When two LC units are close enough to “see” a
Tag in the other zone, you should implement
Stagger Tuning. This will help keep egress
alarms associated with the appropriate LC unit.
To implement Stagger Tuning, 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. Remove power to the LC unit by
unplugging the unit or removing the P3
terminal block
5. The LC unit comes from the factory
with 2 different crystals, normally Y1
(130 KHZ) and Y2 (132 KHZ).
6. Jumper JP1 on the LC unit selects which
crystal frequency is in use. Position 1-2
selects crystal Y1. Position 2-3 selects
crystal Y2. Place the jumper in the
desired position.
7. Restore power to the LC unit after you
have set the jumper in place.
8. Retune the zone (see page 2-7).
9. Confirm the frequency has been
changed by testing the zone. Generate
an alarm in the adjacent zone and make
sure it does not alarm in the current zone
and then test again vice versa.
10. When finished, replace jumper JP2 and
the LC cover with spanner screws.
11. Reset the zone by entering a valid code
into the zone Keypad.
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.