User's Manual

Manual 7-9386-1 Page 7TX RX Systems Inc. 09/30/04
61-68-50 UserMan page 7 of 25
GENERAL DESCRIPTION
Signal boosters extend radio coverage into areas
where abrupt propagation losses prevent reliable
communication. No frequency translation (conver-
sion) occurs with this device. The UHF version of
Signal Booster II (SB II) is a broadband, bi-direc-
tional signal booster available in a variety of config-
urations as shown in
Table 1
. The product part
number is used to describe each configuration
available. The UHF version of SB II is available in
the 450 to 512 MHz frequency band. Each of the
three UHF sub-band types are identical except for
differences in the input/output filtering used in the
unit. This manual details the installation and opera-
tion of the 61-68-50 family of boosters which
includes all three sub-bands within the UHF fre-
quency range. The complete product family for the
61-68-50 boosters are listed in
Table 2
.
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 and mid level slots as
shown in the block diagrams at the back of this
manual. The maximum gain of the uplink or down-
link branch is adjustable and can be setup inde-
pendently. In addition, the gain of each branch can
be reduced up to 30 dB in 0.5 dB increments via
software 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 about 100 lbs. so use enough peo-
ple 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
should be located where it cannot be tampered
with by the general public, yet is easily accessible
to service personnel. Also consider the weight of
61 - 70 - 50 - A2.0 - G1
(Example)
TYPE SUB-BAND FAMILY COARSE
GAIN
BANDWIDTH ENCLOSURE
TYPE
61 = 2 Way 70 =
71 =
72 =
450 - 470
470 - 490
488 - 512
50 = Signal
Booster
II
A = 80 dB 0.5 =
2.0 =
500 KHz
2.0 MHz
G1 =
G2 =
RM =
Painted, Nema4
Stainless, Nema4X
Rack Mount
Note: Factory preset to 50 dB. Please measure antenna isolation before resetting.
*
*
Table 1
: Part number designations for 61-68-50.
GAI