User's Manual

( A, B, C, D, E & F) are offered. Pre-aligned antennas on each side of the repeaters
make them easy to install and simple to operate. Designed for indoor environments,
they only require a standard US 110VAC outlet for operating power. All three
popular PCS systems (TDMA, CDMA & GSM) are supported.
Figure 3 is an electronic block diagram of SSR internal and external circuitry.
Separate antennas provide receive and transmit functions for the complementary
uplink and downlink bands. In operation, the appropriate receive antenna feeds its’
signal to a band pass filter that functions to reject undesired signals and isolate the
complementary band’s signal. The signal from the band pass filter feeds an amplifier
with an AGC loop that limits maximum output power to approximately 100
milliwatts. The amplifier output feeds a second band pass filter functioning to limit
spurious amplifier output signals and further isolate the complementary band’s signal.
The complementary band’s signal path is identical to that previously described,
except in the reverse direction. Both amplifiers include crude RSSI circuitry and
over-current protection circuitry.
1.3 Operational Environment
The SSR has been designed to operate properly in a temperature and humidity
controlled indoor environment. Operation in environments where the ambient
temperature is outside the 50
o
-85
o
F range or the relative humidity is greater than 50%
may result in unsatisfactory performance. Exposure to temperatures outside the 10
o
-
120
o
F range or relative humidity greater than 80% may result in permanent damage
to the unit.
2.0 Installation Guide Lines
2.1 Location
CAUTION: In order to comply with FCC rules for rf exposure, the following must
be observed:
The antenna must be installed such that a minimum separation distance of 20 cm. is
maintained between the antenna and any persons.
Proper operation of the SSR cannot be achieved if the following installation location
guide lines are not followed.
The prevention of signal feedback from the transmit antenna on one side of the SSR
to the same path’s receive antenna on the opposite side of the SSR is paramount to
proper operation of the SSR. Any matter in the surrounding environment of the SSR
will produce undesirable feedback signals. Any object with any physical dimension
that is greater than 2 inches may cause undesirable signal reflections and/or
refractions severe enough to cause unstable operation of the SSR. Metal objects
normally cause worse reflections and/or refraction than non-metallic objects. The
level of undesired reflected and/or refracted signals is directly proportional to the size
of the object and inversely proportional to the distance between the SSR and the