Manual 7-9415-1.4 Page 7
TX RX Systems Inc. 08/31/06
61-65-50 UserMan page 7 of 24
GENERAL DESCRIPTION
Signal boosters extend radio coverage into areas
where abrupt propagation losses prevent reliable
communication. This system receives an RF sig-
nal, raises its power level, and couples it to an
antenna or leaky (radiating) coaxial cable system
so that it can be re-radiated. No frequency transla-
tion (conversion) occurs with this device. The two-
way signal booster 61-65-50-XXX-XX is a broad-
band, bidirectional, dual branch (uplink and down-
link) system available in 5.0 MHz passbands. The
booster passes uplink and downlink signals from
406 to 430 MHz. The booster is available in a vari-
ety of configurations as listed in
Table 1
. A front
view of the booster is shown in
Figure 1
.
Linear RF active amplifiers, filters, and DC power
sources are used to adequately boost and re-radi-
ate the passband signals. Amplifier stages used in
this signal booster system may be damaged by
excessively strong input signal levels. To minimize
this the system is equipped with Output Leveling
Circuitry (OLC) to protect the amplifiers and reduce
spurious signals.
The system can be ordered in one of three maxi-
mum gain configurations including Full Gain (+80
dB gain max), Medium Gain (+60 dB gain max),
and Low Gain (+45 dB max gain). The maximum
gain of the system is determined by the exact type
of cards plugged into the low level and mid level
slots. The maximum gain of the uplink or downlink
branch is adjustable and can be setup indepen-
dently. In addition, the gain of each branch can be
reduced up to 30 dB in 0.5 dB increments via soft-
ware interface.
Three cabinet styles are available. The G1 suffix
denotes a NEMA-4 style cabinet which is suitable
for indoor or outdoor use. The G2 suffix denotes a
stainless steel NEMA-4X style cabinet suitable for
corrosive environments such as salt air and the RM
suffix a rack mount version which is intended for
indoor mounting only.
UNPACKING
It is important to report any visible damage to the
carrier immediately. It is the customer's responsibil-
ity to file damage claims with the carrier within a
short period of time after delivery (1 to 5 days).
Care should be taken when removing the unit from
the packing box to avoid damage to external heat-
sink fins. Use caution because the heatsink fins
can have somewhat sharp corners. Signal Booster
II (SB II) weighs in excess of 205 pounds so use
enough people when lifting the unit.
INSTALLATION
The following sections discuss general consider-
ations for installing the booster. All work should be
performed by qualified personal in accordance with
local codes.
Location
The layout of the signal distribution system will be
the prime factor in determining the mounting loca-
tion of Signal Booster II. However, safety and ser-
viceability are also key considerations. The unit
61 - 65 - 50 - A5.0 - G1
(Example)
TYPE
FREQUENCY
BAND
FAMILY
COARSE
GAIN
BANDWIDTH
ENCLOSURE
TYPE
61 = 2 Way
65 = 406 - 430
50 = Signal
Booster
II
A =
B =
C =
80 dB
60 dB
45 dB
5.0 = 5 MHz
G1 =
G2 =
RM =
Painted, Nema4
Stainless, Nema4X
Rack Mount
*
Note: Gain of 80 dB Model set to 50 dB at Factory. Please measure antenna isolation before resetting.
*
Table 1
: Model number designations for 61-65-50.
GAI
