ADTRAN TRACER User Manual page 37

61280.003L1-1B
S BBP F
ETTING THE
Upon the initial application of power, the BBP will default to the
factory-preset Frequency Plan, or to the Frequency Plan in use
when the unit was last powered-down. The BBP attached to the
RFC configured for Plan B must be set to Plan B by pressing the
"Plan" switch on the front panel. The LED will indicate which
frequency plan is active. On subsequent reboots, such as after a
loss of power, the BBP will default to the most recently-used Plan
setting.
S C
PREADING ODE
The spreading code for each end must be the same. The choice of
operating code is selectable by the operator or the installer. Tracer
is shipped in a matched (default) configuration.
It is possible for the spreading code to be changed remotely through
the VT-100 interface from the other end of the link. When this is
performed, communications will be lost to the far end. The spreading
code will change to code "0" and communications will be lost as
soon as this change is made. If this happens, set the Spreading
Code on the local unit to code "0". The units should regain
communications as soon as the correct code is selected.
C -L M
O OCATING ULTIPLE
When multiple 2.4 GHz transmitters are to be co-located (installed
in the same equipment room or on the same tower), it is advised
to set all systems as follows:
1.
2.
4/12/99
P
REQUENCY LAN
2.4 GH
Z
If more than one 2.4 GHz system is transmitting from the same
location, set the antenna polarity of one system horizontal and
the other system(s) vertical. (The antennas should be marked
as to which mounting position is vertical or horizontal.) This
will provide approximately 30 dB of isolation between the
different antennas.
If more than one Tracer system is installed, set the co-located
transmitters to the same frequency plan (example: Plan A,
Tx=2422; or Plan B, Tx=2462) and set each to a different
spreading code. This keeps the transmitters on the additional
system(s) from interfering with the co-located receiver(s).
W A R N I N G
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YSTEMS
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AGE
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NSTALLATION