Download - BTS3012 Quick Installation Guide
HUAWEI BTS3012 Fast Installation Guide Internal Use
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BTS3012 Fast Installation Guide
Installation Process
Yes
No
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Yes
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Yes
No
Yes
Installation starts
Is the cabling rack needed?
Install the cabling rack
Is the grounding bar needed?
Install the grounding bar
Install the cabinet
Install the boards
Is the sidepower power system needed?
Install cables
Check the installation of hardware
Does the installation pass the check? Reinstall the parts that do not pass the check
Installation ends
Install the sidepower power system
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Notes:
The guide does not describe how to install the cabling rack, grounding bar, and sidepower power
system. For the specific installation of the preceding parts, refer to the HUAWEI BTS3012 Base
Station Installation Manual-Cabinet Installation.
A BTS3012 cabinet can be installed in the following modes:
Install the cabinet on the cement ground with enough bearing capacity
Install the cabinet on the antistatic floor
Install the cabinet on the cement ground with insufficient bearing capacity
Install combined cabinets
The guide describes how to install a BTS3012 cabinet on the cement ground with enough bearing
capacity. To know other installation modes, refer to the HUAWEI BTS3012 Base Station Installation
Manual-Cabinet Installation.
Appearance and Configuration of BTS3012
HUAWEI BTS3012 Fast Installation Guide Internal Use
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Appearance
and
configuration
BTS3012 Cabinet Layout Principle
Layout principle
Multiple BTS3012 cabinets can be installed in combined mode. Reserve a passage with a width of least 0.8m in front of the cabinet. Keep the cabinet close to the sealing window of feeder cables to reduce the length
of feeder cables. In all installation conditions, use a horizontal ruler to measure the levelness of
cabinets and ensure that the cabinet to be installed is on a horizontal surface with other cabinets in the equipment room.
Notes: Do not install a cabinet close to the wall. When installing a cabinet along the wall, reserve a gap of at least 10cm.
Cabinet Installation — Install a BTS3012 cabinet on the cement ground with enough bearing capacity
HUAWEI BTS3012 Fast Installation Guide Internal Use
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Locate the
base
Confirm the position of a cabinet according to the following figure.
Note:
The breach in the preceding figure indicates the position of the front door of the cabinet.
Caution
In a building made of lift-slabs, do not install multiple cabinets on a slab.
Install
expansion
bolts
Use a Ф16 drill hammer to install M12 expansion bolts. For the process of installing expansion bolts,
refer to the HUAWEI BTS3012 Base Station Installation Manual-Cabinet Installation.
457 ± 1
600
Front
Rear
Left Right
24
370 ± 1
450 Hole position of
expansion bolt
HUAWEI BTS3012 Fast Installation Guide Internal Use
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Fix the base
Install the insulation shells, flat washers, spring washers, and bolts in a correct order.
Adjust the
levelness
Use a horizontal ruler to check the levelness of two horizontal borders on the top of the bottom frame. If the bottom frame is out of the horizontal, add leveling washers below the insulation plate to level the bottom frame.
Check the
insulativity
Check the resistance of the bottom frame.
If the resistance is equal to or bigger than 5MΩ, the bottom frame is insulated from the ground. You can fix the cabinet then.
If the resistance is smaller than 5MΩ, the bottom frame is not insulated. You need check the bottom frame and ensure that it is correctly installed.
HUAWEI BTS3012 Fast Installation Guide Internal Use
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Fix the cabinet
To fix a cabinet on the bottom frame, do as follows:
1. Put the cabinet on the bottom frame to have the upper frame supported by the below frame.
2. Push the cabinet along the guide rails to make the upper frame and bottom frame tightly combined.
3. Use two bolts to fasten the upper and bottom frames.
4. Fix the panel at the front of the base.
5. Fasten the assembled bolts on the panel.
Finish the
installation
After a cabinet is installed, check the surface of the cabinet. Paint the cabinet if the paint on the
cabinet peels off.
Install the boards
Prepare for the
installation Notes
Before installing a board, pay attention to the following issues:
Check the cabinet and frames and clean the cabinet and frame.
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Wear an ESD-preventive wrist strap before installing a board.
Do not touch the printed circuit board or components except jumpers and DIP switches with bare hands.
To install a DTMU board, do as follows:
1. Set the DIP switches of the board. The DIP switches S4, S5, S6, and S7 are used
to select the grounding for the outer shell of No.1–8 E1 cables. S3 is reserved. For
the description of DIP switches, refer to the silk print on the board or the HUAWEI
BTS3012 Base Station Installation Manual-Cabinet Installation.
ONS4
S5
S6
S7
OFF
S3
4
14141
4
1
41
2. Rotate the foursquare bolts clockwise on the panel of the board clockwise to
ensure that the bolts are movable. Pull out the handle bars on the DTMU panel
and push the DTMU board along the slide till the DTMU board cannot move.
3. Fasten the handle bars and screw down the preceding bolts.
Antistatic jack Connector of antistatic wrist strap
Antistatic wrist strap
HUAWEI BTS3012 Fast Installation Guide Internal Use
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Install a DTMU
board
Handle bar on the panel and subrack
Install the
DEMU and
sensors
Notes: You need only manually set the DIP switch SW_AV. Other seven DIP switches can be set through dynamic data configuration console
Remove the anti-dust cover when setting the DIP switch SW_AV.
1. Set DIP switches on the DEMU board according to the type of sensor signals. Eight DIP
switches are distributed on the DEMU board. For description of DIP switches, refer to the
silk print on the board or the HUAWEI BTS3012 Base Station Installation Manual-Cabinet
Installation.
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ON SW_THE
OFF 4 1 4 1
SW_AE
4 1
SW_BKE
18 18 18 18 14
OFF ON
SW12BSW24B SW24A SW24B SW_AV
2. Push the DEMU board along the slide till the DEMU board cannot move and use a screw
driver to screw down the bolts.
3. Install sensors according to the customer demand.
Door status sensor Install the sensor at the border between the top of the door and the doorframe. To install the door status sensor, do as follows:
(1) Use a pencil to mark the positions of installation holes for the door status sensor on the door and doorframe.
(2) Use a percussion drill to drill holes at the preceding marked positions.
(3) Put plastic expansion tubes into the installation holes.
(4) Use bolts to fasten the door status sensor on the doorframe and door.
Water sensor
Place the sensor at the place where water easily penetrates or lower place in the equipment room. To install the water sensor, do as follows:
(1) Select a lower position in the equipment room or the position below the BTS equipment, and clean the position.
(2) Place the water sensor horizontally.
Smoke sensor
Install the smoke sensor at the center of the ceiling of the house. To install the smoke sensor, do as follows:
(1) Remove the base from the smoke sensor.
(2) Use a pencil to mark the positions of installation holes for the base on the ceiling.
(3) Use a percussion drill to drill holes at the marked positions.
(4) Put plastic expansion tubes into the installation holes.
(5) Use bolts to fasten the base on the ceiling.
(6) Install the smoke sensor.
Infrared sensor
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Place the infrared sensor on a wall where there is a big detection scope and at a height of 1.5m above the ground. The sensor should face a position that possibly encounters intrusion and there must be no obstacle in the detection scope. To install the infrared sensor, do as follows:
(1) Remove the installation base from the back of the infrared sensor.
(2) Use a pencil to mark two hole positions on the wall.
(3) Use a percussion drill to drill holes at the marked positions.
(4) Put the plastic expansion tubes into the installation holes.
(5) Use bolts to fasten the installation base on the wall.
(6) Screw down the infrared sensor on the installation base.
Temperature and humidity sensor
Install the temperature and humidity sensor on the wall at a height of 1.5m. To install the temperature and humidity sensor, do as follows:
(1) Remove the backplane of the temperature and humidity sensor.
(2) Use a pencil to mark three hole positions for the backplane on the wall.
(3) Use a percussion drill to drill holes at the marked positions.
(4) Put the plastic expansion tubes into the installation holes.
(5) Use bolts to fix the backplane of the temperature and humidity sensor on the wall.
(6) Install the temperature and humidity sensor on the backplane again.
4. Connect sensors to the cabinet. Connect the MD68 male connector of digital signal
conversion cable to the IN port on the DEMU plane.
Use the special monitoring signal cable to connect the AIN port on the DMLC board on the
top of the cabinet and the DDF, and connect the external alarm signal connection terminals
of DDF to all sensors.
Install a DATU
board
When installing a DATU board, you need not set DIP switches on the DATU board. The method of
installing a DATU board is the same as the method of installing a DTMU board.
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Install a DTRU
board
Notes: After installation is complete, put protective caps at the bottom of the cabinet for the sake of future use.
Install protective caps on the power cable connectors that are not used,
so that the inner conductor in the cable connectors does not contact the
edges or corners of the cabinet, which may cause accidents.
1. Confirm the installation slot of a board according to different configuration modes for the sake of convenient cable distribution and maintenance.
2. Hold the handle bar with one hand, lift the module with the other hand, and put the module in the corresponding slide and push the module into the slide.
3. Screw down four bolts at the four corners of the plane to fasten the module and frame.
4. Remove protective caps from power cables of all DTRU boards. Insert cable connectors into the PWR interfaces on the DTRU planes and screw down the bolts.
5. Install a blank filler panel in the idle slot and screw down the bolts. Put the unused power cables in order and use cable ties to bind the cables to the handle bar.
Install a DDPU
board and a
DCOM board
Notes: After power-on of the cabinet, the DDPU boards and DCOM boards have a high temperature. Therefore, do not touch the boards to avoid scald.
The DDPU boards are hot swappable. After removing a DDPU board, install protective caps on connectors of the power cables, so that the inner conductor in the cable connectors do not contact the edges or corners of the cabinet, which may cause accidents.
After installation, put the removed protective caps at the bottom of the cabinet for the sake of future use.
Install protective caps on the unused power cable connectors, so that the inner conductor in the cable connectors does not contact the edges or corners of the cabinet, which may cause accidents.
If a tower amplifier is configured at the top of the tower at a site, install Bias-Tee at the antenna port on the top of the cabinet to supply feed to the tower amplifier.
For the specific method of installing Bias-Tee at the top of the cabinet, refer to the HUAWEI BTS3012 Base Station Installation Manual-Antenna System Installation.
The method of installing a DDPU board is the same as the method of installing a DTRU board.
Install the
board on the
top of the
cabinet
Caution
Gently plug or push the boards in the subracks at the top of the cabinet, or
the pins may be bent by big force.
Distinguish the slot positions of the DSAC from the slot positions of the
DMLC and DELC.
1. Hold the two handle bars with two hands and put the board into the corresponding slot.
2. Push the board into the slot.
3. Hold the handle bars with two hands and insert the board into the slot tightly.
Install cables
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Cable layout at
the front of the
cabinet
P11
S12.5
S14
S13.6
S13.4S13.3
S13.5
P13
P9
P7
P8
P12
P14
To cabinet top :
FAN
DEMU
DCOM DCOM
DTRU DTRU DTRU DTRU
DDPU DDPU P2
P1BGND
P6TX 1
TX 2
P6.2 P6.3
P6
P9
P10P11P12
TX 1
TX 2
DCOM DDPU
DTRUDTRU
P6.1
R2
R1
R4 R6
R3R1
-48V
R19
R8
R3 R4 R5
R5
R6
R9 R10 R11 R12
R13 R15 R16 R17 R18R14R7
R8
R9
R10 R12
R13R14
R15R16
P14
S9
S10
S10
S11
S11
S12.2S12.1 S12.3 S12.4 S12.6
S12
DCCU
Signal cable Power cable RF cable
S12
S9
S13.1
S13.2
DATU
R20
R7
R2
R21
R22
R23
R24
R25
R26
R27
R28 R30
R29
R11
R17R18
DTRB
DCSU
S14
S13S16
S16
S17
S17.1
S17.2
P15
BBU/Transmission
subrack
P15
P10
P13
P15P15
S15
S15
P7P8
Notes:
In the preceding figure, the RF connection cables are configured between the DTRU and DDPU boards on the basis of S4/4/4 configuration mode.
In normal conditions, do no configure DCOM modules in S4/4/4 configuration mode. But the DCOM module is added in the preceding figure to show the connection of signal cables
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from the DCTB to DAFU subrack.
In the preceding figure, seven signal cables, including S10–S13, S15–S17 are all connected to the top of the cabinet.
Install radio frequency signal cables
Installation
requirements
Notes:
The cables must not hide LEDs on boards from view.
Make proper cable layout on a board to avoid obstacle of other boards and facilitate
convenient maintenance of boards.
RF signal cables include RF Rx cables and RF Tx cables.
RF Tx Cable
RF Rx Cable
1
2
1
2
To install RF signal cables, do as follows:
1. Connect one SMA angle male connector of the Rx cable to the RX port of the DDPU board and screw down the cable connector.
2. Connect the other SMA angle male connector of the Rx cable to the Rx port of the DTRU board and screw down the cable connector.
3. Connect one N angle male connector of the Tx cable to the Tx port of the DDPU board and screw down the cable connector.
4. Connect the other N angle male connector of the Tx cable to the Tx port of the DTRU board and screw down the cable connector.
5. Put the excessive parts of the RF signal cables into the cabling slots between two subracks and bind the cables with cable ties in order.
Connection of RF signal cables is finished.
Install the combined short-circuiting cables
Caution
Rotate both the upper and lower connectors of a cable at the same time, or the cable may be twisted.
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Install the
combined
short-circuiting
cables
To get combined carrier signals, use the combined short-circuiting cable to connect the TX
interface and IN interface of the DTRU board to achieve the combined output of transmitting
signals.
To install a combined short-circuiting cable, do as follows: 1. According to the BTS configuration mode, confirm the connection relationship between TX
interface and IN interface on the DTRU plane.
2. Connect one end (the N straight male connector) of the cable to the TX1 or TX2 interface
on the DTRU plane and the other end (the SMA straight male connector) to the IN1 or IN2
interface. Screw down the upper and the bottom connectors at the same time.
Install 1/2 inch indoor jumpers
Installing 1/2
inch indoor
jumpers
Caution
Tightly connect 1/2 inch indoor jumpers to avoid leakage of radio frequency
signals.
Connect one end of 1/2 inch indoor cable to the ANT port of the DDPU board and connect the other
end to the feeder cable through the feeder connector.
To install the 1/2 inch indoor cable, do as follows:
1. Cut cables into parts of proper length according to the cable distribution on cabling racks and
create DIN-type male connectors for both ends of the cables.
2. According to the configuration relationship, connect the DIN-type connector at one end of the jumper to the antenna interface ANTA or ANTB on the top of the DDPU board and the DIN-type connector at the other end of the jumper to the feeder cable of the antenna system.
3. Stick labels at both ends of a cable.
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Install power cables
Connection
specifications
Caution
Do not connect the N line of the AC power cable to the GND protection of
switching equipment or other communication equipment.
Power cables include blue -48V power cables and black DC grounding cables.
Connection specifications:
Bind the –48V power cable and DC ground cable. Separate power cables from other cables. When distributing multiple power cables, bind the cables closely and neatly (without twists).
The cables ties should be located with an average distance from each other and in a proper degree of tightness. The cables should have a good shell.
The radius of the cable curve cannot be smaller than 20 times of the core diameter of the cable.
Distribute power cables according to the requirements of engineering drawing. When distributing power cables, do not connect two power cables with connectors or by
soldering if a power cable is not long enough, but replace with a new power cable.
Connect
power cables
To connect power cables to the cabinet, do as follows:
1. Remove the protective caps from the EMI filter and power input terminal block.
2. Insert the cord end terminal of a power cable through the terminal block.
3. Use a flathead screw driver to loosen the bolt in the hole above the power input terminal.
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4. Insert the cord end terminal of power cable into the cable connection hole on the left of the cord end terminal, screw down the bolt above the cable connection hole, and then use cable ties to bind the power cable to the bundling rack.
5. Reinstall protective caps.
To connect power cable and power distribution frame (PDF), do as follows:
Distribute the power cable along the cabling rack to the side of the PDF, and fix the OT terminals of power cable on the corresponding binding posts on the PDF.
Caution If the power of PDF is switched on, do not touch the cabinet with the adjustable
wrench and screw driver. It is recommended that the adjustable wrench is
bounded with insulated tape.
Install the protection ground cable
Installing a
protection
ground cable
The protection ground cable is a plastic insulation copper core cable of which the colors are yellow
and green and the cross-sectional area is bigger than 16mm2 (usually 25 mm2).
To connect a protection ground cable, do as follows:
1. Get a piece of power cable with a proper length and create OT terminals for the protection
ground cable.
2. Remove the protective cap from the power input terminal block, put one end of the protection ground cable through the terminal block, and connect the end of the protection ground cable to the PGND binding post on the protection ground bar.
3. Distribute the protection ground cable along cabling racks to the ground bar, and then connect the protection ground cable to the terminal of grounding bar.
Install the E1 cable
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Installing an
E1 cable
E1 cables include 75Ω E1 cable and 120Ω E1 cable. An E1 cable is connected to the TR interface on
the DELC board at the top of the cabinet.
To install an E1 cable, do as follows:
1. Insert the DB25 male connector of the E1 cable into the DB25 female socket on the DELC board at the top of the cabinet, and screw down the bolts.
2. Get cables of proper length according to the actual situation, create cable connectors, distribute cables on cabling racks, and connect the connectors to the cable connection terminals on the cabling racks.
3. Stick labels on the E1 cables.
Install signal cables at the top of the cabinet
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Installing
signal cables
Signal cables at the top of the cabinet include:
Digital signal input cable Digital signal output cable Monitoring signal cable Anti-lightning failure alarm cable Environment monitoring device signal cable
The following table shows the connection relationship between signal cables and interface boards at
the top of the cabinet:
Type of signal cable
Interface at the top of the cabinet
Type of connector at the top of the cabinet
Peer equipment
Digital signal input cable
SWIN interface of the DMLC
MD68 male connector
Related controlling
equipment
Digital signal output cable
SWOUT interface of the DMLC
DB15 male connector
Related controlling
equipment
Monitoring signal cable
AIN interface of the DMLC DB44 male connector
DDF
Anti-lightning failure alarm cable
S1+S1- interfaces of the DSAC
2PIN phoenix terminal
Lightning arrester of
power
Anti-lightning failure alarm cable of combined cabinets
S1+S1-, and S2+S2- interfaces of the DSAC
2PIN phoenix terminal
Corresponding
interface of the slave
cabinet
Environment monitoring device signal cable
COM1 port and COM2 port of the DSAC
DB9 male connector
Environment
monitoring device
The installation specifications of signal cables at the top of the cabinet are the same as the
installation specifications of E1 cables. For details, refer to the E1 cable installation specifications.
Install electrical adjusted signal cables
Installation Refer to the HUAWEI BTS3012 Base Station Installation Manual-Cabinet Installation.
Install signal cables of combined cabinets
Installation Refer to the HUAWEI BTS3012 Base Station Installation Manual-Cabinet Installation.
Install combined signal cables
Installation Refer to the HUAWEI BTS3012 Base Station Installation Manual-Cabinet Installation.
Install equipotential cables of combined cabinets
Installation Refer to the HUAWEI BTS3012 Base Station Installation Manual-Cabinet Installation.
Install optical fibers
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Formatted: Bullets and Numbering
Installation Refer to the HUAWEI BTS3012 Base Station Installation Manual-Cabinet Installation.
Check after installation——Power-on check
Preparing for the check
Note: The section describes the process of power-on check when the system is supplied with -48V DC power.
When the power of the cabinet is not switched on, use a multimeter to measure the resistance of all
power binding posts and ground binding posts and check for short circuit.
Power-on check of the
cabinet
1. Set all power switches on Busbar to “OFF” and turn on the switch of PDF to power on the cabinet.
2. Check the input voltage of PDF at the top of the BTS3012 cabinet. The allowed voltage is between–40V and –60V.
3. If all conditions are normal, check boards.
5.
Power-on check of fans
Set the power switch of the fan frame to “ON” and observe to see whether the fans normally rotate.
Power-on check of the
DTMU
1. Turn the power switch of the public subrack to “ON”.
2. Observe the RUN indicator on the DTMU board in the public subrack. The RUN indicator should
be slowly blinking (lighted 1s and off 1s) if the DTMU is normal.
Power-on check of the DTRU
1. Turn on the DC air-break switch of the DTRU subrack.
2. Check the RUN indicator on the DTRU plane. The RUN indicator should be slowly blinking
(lighted 1s and off 1s) if the DTRU board is normal.
Power-on check of the
DDPU
1. Check the cable from the DDPU to the DTRU. Check whether the DDPU power cables are
correctly installed.
2. Turn on the DC air-break switch of the DDPU subrack.
3. Check the RUN indicator on the DDPU plane. The RUN indicator should be slowly blinking
(lighted 1s and off 1s) if the DTRU board is normal.
Power-on check of the
DAFU
1. Turn on the DC air-break switch of the DAFU subrack.
2. Check the RUN indicator on the DAFU plane. The RUN indicator should be slowly blinking
(lighted 1s and off 1s) if the DTRU board is normal.
Completing the power-on
checks If all the preceding power-on checks pass, the power supply system of BTS is normal.
Notes about installation of the antenna system
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BTS3012 antenna system
Avoiding reverse
connection of jumpers and feeder cables
Before installing the antenna system, mark all cables to avoid reverse connection of jumpers
and feeder cables. You can stick either labels or colored rings to cables to avoid reverse
connection of cables. Choose a method according to the customer demand.
Stick labels
You can stick corresponding labels to both ends of a cable to avoid reverse connection. The following table shows the labels that are stuck to three directional dual-polarization cables configured for all sectors in S6/6/6.
Labels of feeder cable
ANT1 ANT2 ANT3
Cable TX Cable RX Cable TX Cable RX Cable TX Cable RX
CELL0 Label Ant_0A Ant_0B Ant_0C Ant_0D Ant_0E Ant_0F
CELL1 Label Ant_1A Ant_1B Ant_1C Ant_1D Ant_1E Ant_1F
CELL2 Label Ant_2A Ant_2B Ant_2C Ant_2D Ant_2E Ant_2F
By sticking the preceding labels, you can distinguish three different feeder cables of three sectors. The same method can be used to stick labels to jumpers in the antenna system to achieve the one-to-one mapping with the feeder cable in the same radio frequency channel.
DIN male connector
D D P U
1/4 inch jumper
1/2 inch jumper
Feeder fixing clip and cabling rack
Feeder cable
1/2 inch jumper
Dual-band dual-polarization antenna
DIN female connector
DIN male connector
DIN female connector DIN female connector
Cabling interface of antenna jumper
at the bottom of the cabinet
DIN male connector DIN male connector
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Stick colored rings
You can stick different number of rings of different colors to both ends of cables to avoid the reverse connection. The colored rings in a radio frequency channel should be the same. In the following picture, different cells use colored rings of different colors; the receiving end and transmitting end use different number of color rings.
Constructing the grounding
network
All outdoor BTSs need grounding network. Establish the grounding network and test the quality of
grounding network before civil construction.
For construction of the grounding network, refer to the following picture.
D D P U
Dual-polarization antenna
Feeder
cable
1/2 inch jumper
1/4 inch
jumper
CR1
CR2
CR3
CR4
CR5 CR6
CR7
CR8
CRn indicates the code of colored rings. The feeder cables or jumpers in a radio
frequency channel use colored rings of the same colors and quantities.
namely: CR1 = CR3 = CR5 = CR7 CR2 = CR4 = CR6 = CR8
Note: The picture shows color rings of only a cell. Other cells use colored rings of different colors.
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Installation requirements
of antenna support
1. Keep the antenna support vertical to prevent the antenna from tilting after installation.
2. There should be a distance bigger than 1.2m between supports in a cell.
3. There should be a distance bigger than 0.5m between two cells in a platform.
4. When the GSM antenna has the same height as the CDMA antenna, there should be a distance
bigger than 0.5m between a GSM cell and a CDMA cell.
5. After a support is fixed, there should be no obstacle, for example the microwave antenna, in front
(away from the tower) of the support.
Installation requirements
of antenna
1. Manually adjust the antenna plane to a proper mechanical tilt, and keep the electric adjusted tilt
of the antenna lever to 0°, namely pull out the electric adjusted antenna lever and fix it to 0°.
2. During the construction, do not pull the lever out from the electric adjusted antenna. Pull out the
lever and set it to 0° after the antenna is mounted.
3. Make simple waterproof processing of the two unused antenna interfaces in the dual-band
antenna.
4. The angle between the antenna and support should be smaller than 5°.
5. An omni-directional antenna should be at least 1.5m away from the tower. A directional antenna
should be at least 1m away from the tower.
6. The horizontal distance between the main antenna and diversity antenna of omni-directional
antenna should be as follows: not smaller than 4m for M900; not smaller than 2m for M1800
7. Two directional antennae on a support should have a distance of at least 0.5m from each other.
Tower
Electrode
Grounding network
of the tower
Conductor between grounding networks
BTS Grounding network of BTS
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Requirements on the
planning of feeder cable
route
1. Reasonably plan the feeder cable route to avoid unnecessary occupation of space. 2. The feeder cable route should not block off the building of equipment room or the passageway. 3. The feeder cable cannot go through the cement platform in front of the cabinet door but should
go around the cement platform to the rear of the cabinet. 4. Plan positions for feeder cables of all sectors. The feeder cables of different sectors should be
distributed in different layers and different rows to avoid cross connection of feeder cables. 5. Make a consistent numbering of feeder cables both at the antenna side and the cabinet side to
avoid incorrect connection of feeder cables. 6. When distributing feeder cables at the rear of the cabinet, keep the feeder cables a proper
distance away from the power cables and transmission cables to avoid horizontal cross connection.
7. The feeder cables may cross the top of the building to the outside of the wall, so you need wear a protective tube on the part of the cable contacting the corner of the wall.
8. Make waterproof curves for jumpers at the following positions: The position where the jumpers access the equipment room The cable leading-out position of the antenna
9. The curve radius of feeder cables should be at least 20 times of the diameter of the feeder cable.
α < 5 °
a b
c
d
Electric adjusted antenna lever Pull out the lever out and set it to 0°after the mounting is finished.
Jumper connector with waterproof processing
HUAWEI BTS3012 Fast Installation Guide Internal Use
24
Grounding requirements of antenna
1. Install a feeder clip every 1.5m on the feeder cable.
2. Connect the following positions of a feeder cable to the ground separately:
Top of the tower
Bottom of the tower
Point accessing the BTS
If two grounding points of a feeder cable have a distance over 60m, make another grounding
point between the two grounding points.
3. Make waterproof processing at the following positions of feeder cables and grounding cables:
The positions where the outer shell of feeder cables are peeled off for grounding
The positions where the grounding cables are connected to the grounding bar
4. The angle between a feeder cable and its grounding cable should be smaller than 15°.
Testing the antenna system
1. Use a radio analyzer to test the standing wave ratio of DIN male connector of the 1/2 inch jumper
connecting the antenna system.
2. The standing wave ratio should be smaller than 1.3.
3. If the standing wave ratio is equal to or bigger than 1.5, the antenna system has faults. In this
case, test the standing wave ratio segment by segment to locate problems.
Lightning arrester
Tower
Antenna
Grounding point at the top of the tower
Intermediate grounding point (the feeder cable on the tower is over 60m)
Feeder cable
Grounding point at the bottom of the tower Grounding cable of the feeder cable
Feeder grounding clip Cabling rack
Grounding bar Grounding cable of BTS BTS
Feeder cable
α < 1 5 °
Cabling rack of the feeder cable Feeder cable clip
HUAWEI BTS3012 Fast Installation Guide Internal Use
25
Waterproof requirements
of cables
After testing the antenna system, make waterproof processing for cables at the positions
where cables connect.
After an installed antenna system passes the test, use waterproof insulated tapes and PVC tapes to
make waterproof processing for cables at the positions where jumpers connect to the tower amplifier
and the positions where jumpers connects feeder cables.
To protect the cables against water and avoid the standing wave alarms, create waterproof curves at
the positions where jumpers and feeder cables connect.
Use the tape to wrap a jumper where it
connects to another cable
Expected appearance
after installation
Expected appearance
after installation