Communication Components BDA-8087-52C Bi-Directional Amplifier model BDA-8087-52C User Manual BDA TEST AND INSTALLATION PROCEDURE1
Communication Components Inc Bi-Directional Amplifier model BDA-8087-52C BDA TEST AND INSTALLATION PROCEDURE1
Users Manual
BDA TEST AND INSTALLATION PROCEDURE
1. INSPECTION
CAUTION: A minimum separation distance of 20
centimeters between the transmit antenna and
nearby persons must be maintained. If this
separation distance is not maintained, the device
may not be in compliance with FCC RF Exposure
rules.
Open the enclosure of the bi-directional amplifier (BDA) and carefully inspect the inside
assembly of the unit.
Verify that all components are properly secured to the base of enclosure, there are no
loose parts, and all interconnections are reliable. Carefully close the enclosure.
Unpack the outdoor and indoor antennas and inspect the content. Verify that there are no
loose parts or rattling in the antennas. Make sure that antennas are not deformed.
2. SITE INSTALLATION
2.1 "Donor" (outdoor) Antenna Installation
On the roof of the building chose the location of the "donor" Yagi antenna. Point the
antenna towards the "donor" site. Connect the mobile phone or spectrum analyzer to the
antenna using short cable with type "N" connector on the antenna side and proper adapter
on the test equipment side. Adjust the position of the antenna for the maximum reading.
The average power level should not be below -85 dBm. Record the measured data. Install
the antenna following instructions of the antenna manufacturer.
CAUTION: A minimum separation distance of 20
centimeters between the transmit antenna and
nearby persons must be maintained. If this
separation distance is not maintained, the devicemay
not be in compliance with FCC RF Exposure rules.
CAUTION
Use caution working with the bi-directional amplifier.
Disconnect the 115 VAC from the amplifier prior to
inspection.
2.2 Surge Protector Installation
Connect the cable run to the antenna and pass it through the roof manifold. Inside of the
building find a location for the surge protector near the construction ground where it can
be reliably grounded.
Install the surge protector and connect the cables to both sides. Bring the cable run to the
BDA location. Using a spectrum analyzer or mobile phone, measure the signal from the
"donor" site. It has to be from 1 dB to 3 dB below the antenna output level. Exact loss
depends on the cable type and length of the cable.
2.3 Indoor Antenna (s) Installation.
From preliminary evaluation of the blueprints of the service area, the approximate
locations of the indoor antennas must be established. The level of the signal at the
boundary of the service area can be a guideline for the location of the antennas. Several
parameters must be considered:
a) the gain of the Omni antenna is 0 dBd.
b) the free space propagation loss is approximately -60 dB per 100 ft.
c) the acceptable level at the lowest signal position for the mobile is -80 dBm.
Following the installation instructions mount antennas at the ceiling tiles or any other
appropriate locations. Run the cables from antennas to the BDA location. Use power
combiner, if needed, to interconnect the antenna cables.
CAUTION: A minimum separation distance of 20
centimeters between the transmit antenna and
nearby persons must be maintained. If this
separation distance is not maintained, the device
may not be in compliance with FCC RF Exposure
rules.
2.4 BDA Installation
The bi-directional amplifier can be installed as a freestanding unit lying on the shelf of
the cabinet or any other adequately strong support. It can also be secured by screws to the
wall or rack using four holes in the tabs located at the back plate of the enclosure. AC
power must be available in the vicinity of the BDA. It is recommended that the
environmental temperature will not exceed 65 C and the area will be adequately
ventilated.
Once amplifier is installed in place, open the front door and verify that all internal parts
are securely mounted. Connect the ground wire to the ground stud on the enclosure.
Plug in the AC cable into the AC socket. The green light on the enclosure must be lit on.
a) Downlink Gain Setting.
Connect the cable from the lightning protector and “DONOR” antenna to the “DONOR”
port of the BDA.
Connect a power meter or spectrum analyzer to the "SERVICE" port (Uplink input
connector) of the BDA. Measure the power of the signal at the “SERVICE” port of the
BDA.
It should not exceed +24.8 dBm for a single channel or +19.5 dBm for three channels
of CDMA system application.
It should not exceed +25 dBm for single channel or +19.3 dBm for three channels of
TDMA system application.
These power levels will guarantee the intermodulation products below -13 dBm, which is
in compliance with FCC regulation. After the output power level is set correctly, connect
the donor antenna cable to the "DONOR" port of the BDA.
b) Uplink Gain Setting.
Connect the indoor (service area) antenna cable to the "SERVICE" port of the BDA.
Initiate the call from the closest position of the mobile to the service area antenna.
Observe the yellow "Uplink AGC ON" light on BDA enclosure. The threshold of the
AGC in the uplink amplifier is factory preset at the gain that corresponds to the
intermodulation products level of -13 dBm. If the signal level is low and AGC light is not
"ON", slowly increase the gain of the downlink amplifier until the light will be lit. Back
off the potentiometer just below the level when the light is off.
Check the security of the installation and presence of the AC power. Amplifier is ready
for operation.
3. REMOVE BI-DIRECTIONAL AMPLIFIER
3.1 Unplug the AC cord from the socket. AC light on the amplifier must be off.
Disconnect all coaxial cables.
3.2 Dismount amplifier from the wall or remove it from the shelf.
4. SHIPMENT AND STORAGE OF THE BDA
4.1 Use common technical shop practices to ensure equipment protection during shipment
or storage.
5. TROUBLESHOOTING AND FAULT DETECTION
5.1 Check the presence of the AC power. The AC light must be on.
5.2 Check the continuity of all connecting cables.
WARNING!
110 VAC CAN BE LETHAL!
ALWAYS UNPLUG THE AMPLIFIER
BEFORE SERVICING THE INTERIOR.
.
5.3 If the fault was not located, remove the amplifier and send it to the manufacturer for
repair.
5.4 RF testing of the amplifier is possible in the specially equipped laboratory.
6. INFORMATION TO USER
This equipment complies with part 15 of the FCC rules. Any changes or
modifications to this product as well as usage outside of specified electrical
parameters, which are not expressly approved by manufacturer, could void the
user’s authority to operate the equipment.