User's Manual

4-6 The Tx wand antenna Installation Manual
Stagger Tuning
 Implementing 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 so that Tags
activated in one zone do not create events
(locks, alarms, etc.) in another zone.
Implementing Stagger Tuning
The Controller comes from the factory with 3
different crystals, Y1 (130 KHZ), Y2 (131.072
KHZ) and Y3 (132 KHZ). Jumper JP1 on the
Controller selects which crystal frequency is
in use. Position 1 (the upper position) selects
crystal Y1. Position 2 selects crystal Y2, and
position 3 selects Y3. (
see Figure 4.8) Be sure
to turn the unit off, and then back on when you
are done changing the frequency. You must
re-tune after changing the frequency.
The Controller and the Tx wand antennas will
come from the factory set to Y2 (131.072
KHZ). This is the primary frequency and
should be used whenever possible.
When two zones are close enough to “see”
Tags activated in the other zone, you should
implement alternate frequencies. Remember to
cycle the power.
If you are dealing with 3 or more doors close
together, you should stagger the frequencies so
that the 131.072 KHZ (Y2) frequency is used
most often (
see Figure 4.9).
Figure 4.8 The Tx frequency crystals
Typically, you should not operate two doors
on the same frequency when they are closer
than 70 feet.
If you should need more than the 3 factory
installed frequency crystals, contact your
Accutech Representative about acquiring
additional alternate frequency crystals.
Keep in mind whenever you change to an
alternate frequency, you will need to re-tune
the Tx wand antenna(s) (
see page 4-7).
Figure 4.9
Alternating Tx Frequencies in nearby zones