Bird Technologies Group 61170A Manual De Usuario

To comply with FCC RF exposure compliance
requirements, a separation distance of at least 100
cm must be maintained between the antenna of
this device and all persons. This device must not
be co-located or operating in conjunction with any
other antenna or transmitter.

Figure 3 is the functional block diagram of the
standard channelized signal booster model 611-
70A. Figure 4A and 4B show the front and rear
views of the booster cabinet.

Downlink and Uplink input signals are applied to a
distribution amplifier. This is an ultra-low noise high
linearity amplifier with a gain of 18.9 dB. Following
the distribution amp is a 6-way power divider which
is used to distribute the signal to individual channel
modules within the booster cabinet. Downlink sig-
nals are applied to the down converter board of a

downlink branch while uplink signals are applied to
the down converter board of an uplink branch.

Downlink output signals leave the channel module
at the DL OUT connector and are applied to an
active combiner. The active combiner amplifies
and combines signals from multiple modules. Sig-
nals output from the active combiner are applied to
the filter assemblies. Uplink output signals leave
the channel module at the UL OUT connector and
are also applied to an active combiner. The active
combiner amplifies and combines signals from
multiple modules. Following the active combiner
are the filter assemblies.

The exact filter assemblies used in your channel-
ized booster system will depend upon the overall
communications system design and your particular
RF environment. A system level drawing will be
supplied with your booster which details the filter
assemblies used and their interconnections.

Isolation (dB)

Figure 2: Typical test equipment interconnection for measuring antenna isolation.