Installation Manual M900/M1800 Base Transceiver Station (BTS312)

Hardware Installation 9 Hardware Installation Check

03D-0412-20020510-400 9-1

9 Hardware Installation Check

Hardware installation, when completed, should be checked to facilitate the software installation and system commissioning. The checking should include the following: indoor cabinet, antenna feeder system, power cable, grounding cable, cleaness of the equipment room, and power-on.

9.1 Checking the Installation of Indoor Equipment

Installation check of indoor equipment focuses on whether the cabinet installation and the cabinet cable installation can meet the requirements and specifications. The details are as follows:

1) The rack placement should be subject to the design drawings.

2) When installing the cabinet, base should be installed if the equipment room is not equipped with antistatic floor. Support, guide rail and base should be installed if the equipment room is equipped with antistatic floor.

3) Four insulating washers should be installed in each base. Add insulating washer at the part touching the wall if it is installed against the wall to ensure insulation between the cabinet and the wall.

4) The cooperation between base (support leg) and expansion screw holes should be good.

5) The connection between the rack and the base should be reliably firm. After installation, the rack should be stable, level and plumb.

6) The error of the cabinet horizontal degree should be less than 3 mm.

7) The gap between the neighboring bases should not be more than 3 mm.

8) The error of vertical degree of the rack should not be more than 3 mm.9) The upper plane of the antistatic floor in the equipment room should not be higher than the lower surface of the base (to avoid deteriorating heat dissipation of the base).

10) All of the screws should be tightly screwed. Check whether the plain washers, spring washers are installed and whether they are properly installed.

11) Each component of the rack should not fall off from the rack or be damaged. The connection should not be scratched or broken.

12) Cabinet should be cleaned. There should be no dust inside and outside (dead corners included) the rack.

13) The small cover plate of the cabling hole on the top of the cabinet should be pushed forward to cover the cabling hole, and to prevent rodents from entering.

14) In the case of combined cabinets, it is necessary to check whether cabinets are lined up neatly. Check whether the contact of electromagnetic shielding layer at the side door used for inter-cabinet cabling is tight. If not, electromagnetic leakage will pollute the electromagnetic environment. The joint for the combined cabinets on the top of the cabinets should be installed and tightened.

Installation Manual M900/M1800 Base Transceiver Station (BTS312)

Hardware Installation 9 Hardware Installation Check

03D-0412-20020510-400 9-2

15) The appearance of the entire cabinet should be clean and tidy, and the external painting should be complete and in good status. Each label should be correct, clear and complete.

16) The front door of the cabinet can be smoothly opened and closed.

17) The connection of trunk cable connectors should be reliably firm. The trunk cable connectors should be intact.

18) No damage or crack is be found on the power cable, grounding cable, trunk ca ble and RF cable.

19) RF cable connectors should be installed properly to avoid fake connection which may cause abnormal standing wave ratio, or affect the system normal operation.

20) Horizontal part of a RF cable in the cabling should be held down in the cabling channel.

21) The connectors unused should be screwed on with the matching terminals.

22) The cable connecting the CDU and the top of the cabinet should go through the space between two sides of the cabinets.

23) Make sure that the connection cables between TRX and CDU is kept parallel as much as possible, not stretched tightly, and there is enough redundancy reserved at the bending part of the cable.

24) Reserve enough redundancy near the connector of cable.

25) The cable should be neatly bundled. The cable ties should be evenly arranged, each bundling with proper tightness and consistent directions.

26) The extra part of each cable tie should be cut off completely with no remains sticking out of the ring.

27) The cabling should be convenient for maintenance and future capacity expansion.

28) Each cable should be labeled clearly at both ends (with labels).

29) Each fan is able to be switched on/off normally, and the fan should work well and the alarm function should be normal.

30) DC lightning arrester configured for each cabinet is properly and neatly installed.

31) The jumper should be distributed in accordance on a layer-by-layer and per -sector basis.

32) The distance between the jumper and cabinet as well as the lightning arrester should be kept straight for a run of 30cm.

Installation Manual M900/M1800 Base Transceiver Station (BTS312)

Hardware Installation 9 Hardware Installation Check

03D-0412-20020510-400 9-3

9.2 Checking the Antenna and Feeder System

1) The feeder cables should be neatly arranged.

2) Stick feeder and jumper labels according to the specifications. The label arrangement should be neatly arranged in the same direction.

3) The feeder should be without obvious trace of bending or twisting. No naked copper is found on the feeder.

4) The feeders minimal bending radius should not be less than 20 times the feeder radius.

5) The distance between feeder fixi ng clips should be evenly after completing the installation, with the same directions.

6) In the case of feeder being led indoors, the length of outdoor flat part should be more than 0.5 m. The flat part at both sides of lightning arrester rack should be a t least 0.3 m.

7) The feeder distribution should avoid entangling with consistent row, column and bending arrangement.

8) The antenna installation position should be in accordance with the design.(9) The antenna should be within the area that can be protected by the lightning arrester (the protection area of lightning arrester is the scope with the declination of 45 degrees from the top of the antenna).

10) The connection between the antenna support and tower should be reliable.

11) The glue -inserting hole on the sealing suite of the feeder sealing window should be place upwards. The sealing window plate should be installed indoors at one side (In the case of the window of later version, this item is not needed).

12) All outdoor jumper connectors should be processed with waterproof sealing. The jumper should be prepared with waterproof device.

13) The distance between omni-directional antenna and the tower should not be less than 1.5m. The distance between the directional antenna and the tower body should not be less than 1m.

14) The horizontal distance between receiving and transmitting of the omni-directional antenna should not be less than 3.5 m.

15) Diversity distance between two directional receiving antennas should not be less than 4 m.

16) The horizontal/vertical cable distance between receiving and transmitting of the directional antenna should not be less than 2.5 m.

17) The vertical distance between two directional antennas, which are installed on the same antenna support, should not be less than 0.5 m.

18) The top of omni-antenna jacket should be with the same height with the support or slightly higher than the top of the support.

19) The omni-antenna should be vertically erected, and the error should be less than 2.

20) If the omni-antenna is installed at the roof, the horizontal distance between the omni-antenna and the antenna lightning arrester should not be less than 2.5m.

Installation Manual M900/M1800 Base Transceiver Station (BTS312)

Hardware Installation 9 Hardware Installation Check

03D-0412-20020510-400 9-4

21) If the omni-antenna is installed on the roof, avoid blind spots as much as possible.

22) The jumper connec ted to the antenna should be bound along the support rail to the tower steel rack.

23) Azimuth angle error of directional antenna should not be more than 5, and the declination angle of directional antenna should not be more than 0.5.

24) Reserve redundancy when cutting the extra part of cable ties binding the outdoor cables.

25) In installing tower amplification, the side connected to the antenna should be upward, and the side connected to the feeder should be downward. The tower amplification should be installed close to the antenna.

26) If the front of cabinet is parallel with the feeder indoor cabling direction, or the back of cabinet is exactly facing the feeder indoor cabling direction, one sector should be in one row, and the sequence of each r ow should be consistent. If the front of the cabinet is facing the feeder indoor cabling directions, one sector should be in one column, and the sequence of each column should be consistent.

27) In installing feeder window on the roof, and leading the feeder into the room, ensure the feeder window be tightly sealed.

28) The quality of the feeder connector should conform to the specification, without loose connections.

29) The main feeder is correctly connected and the sector is correct.

30) RF coaxial lightning arrester should be hanging at two ranges of the cabling rack, and the lightning arrester should not touch the cabling rack.

9.3 Checking the Power Cables and Grounding Cables

1) PGND protection grounding cable is yellow-green or yellow cable; GND (BGND) grounding cable is black cable; -48V power cable is blue cable.

2) All power cables and grounding cables should adopt copper core cable. The connection conforms to the specification.

3) Core diameter of all of the power cable and grounding cable should meet the requirements.

4) Power cable and grounding cable should be bundled separately in the distribution.

5) The redundant length of the grounding cable and power cable should be cut off, and cannot be reeled.

6) The copper lug prepared at the two ends of power cable and grounding cable should be welded or crimped firmly.

7) The positive polarity of primary power should be led into the earth with the required diameter.

8) The grounding bar should be insulated with the wall, and the trail of grounding cable should be short as much as possible.

9) There should be grounding at least at three places in the feeder between the top of the tower and the equipment room (1, within 1m away from the tower platform; 2, within 1 m away from the tower body to the outdoor cabling rack; 3, within 1 m

Installation Manual M900/M1800 Base Transceiver Station (BTS312)

Hardware Installation 9 Hardware Installation Check

03D-0412-20020510-400 9-5

between the feeder and feeder window). The grounding place should be firmly bound, with good waterproof processing.

10) If the height of the tower is less than 60 m, add one feeder grounding clip to the central tower.

11) If the feeder is off from the iron tower, distribute it at the top of the building (or cabling rack) for certain distance, then lead it into the room. Add a lighting protection grounding clip if this part of length is over 20 m.

12) The feeder grounding clip terminal should be decentralized and fixed at the steel plate that is close to the tower body.

13) The outdoor grounding copper bar should have dedicated and reliable path that can be led to underground grounding network.

14) In the case of the feeder grounding on the top of the building without tower, connect it to the nearby roof lightning protection grounding network.

15) The naked cable at the connecting terminal and lug should be twined with insulating tapes, or be put on with heat-shrink tube, without exposure.

16) Each connecting terminal should be installed firmly, with good contact.

17) Each connecting terminal should be installed with flat washer and spring washer.

18) Both ends of power cable and grounding cable should be label led.

19) Power cable and grounding cable should adopt a whole segment, instead of joining different segments.

20) If the feeder is led into the room from the roof along the wall, the cabling stair should be grounded in the case of using cabling stair.

21) The leading direction in case that the feeder is connected to the grounding cable should be from the upper place to the lower place; its angle versus feeder should not be more than 15.

9.3.1 Check the Equipment Room Cleanness

1) There should be no dis orderly piled up packing boxes or boards of GSM equipment in the equipment room.

2) There should be no cut-off cable ties and other sundries left on the floor.

3) There should be no cut-off cable ties and other sundries left inside the cabinet.

4) There should be no fingerprint or any other dirt on the surface of the cabinet.

5) Rodent-proof net should be complete without damage.

9.3.2 Power-on Check

Before switching on the primary power supply, use a multimeter to check the wiring connectors of various power supplies on the cabinet top and the grounding for any short-circuit.

Installation Manual M900/M1800 Base Transceiver Station (BTS312)

Hardware Installation 9 Hardware Installation Check

03D-0412-20020510-400 9-6

9.3.3 Checking the Primary Power Supply

Power-on check of vacant cabinets: remove the CDU power cables and make sure that no board is inserted in the slots of the backplanes. Switch on the primary power supply to see whether the output voltage is within the allowable range and whether there is any power fault or protection. If any problem occurs, switch off the power supply, clear the fault and then switch on the power supply again until the output voltage is normal.

9.3.4 Power-on Test of the Power Modules

Make sure that all power modules are correctly inserted into the backplanes, none of the other boards are inserted in the slots and the CDU power cables are not connected yet. Switch on the primary power supply to see whether its output voltage is within the allowable range and whether the indicators of all power modules are normal. Measure the output voltages of the power supply modules at the voltage test point with a multimeter to see whether they are within the range of 19~29V. If not, switch off the primary power supply, clear the fault and power on it again until everything is normal.

9.3.5 Board Power-on Test

Switch off all the power switches in the switch box and connect the CDU power cables. Make sure that all boards are inserted in the slots of the backplanes. Check whether the output voltage of the primary power supply, the indicators of the power modules and the voltage at the voltage test point are all normal.

Then switch on the power switches in the switch box one by one to power on the boards and modules in turn. Check whether the output voltage of the primary power supply, the power module indicators and the operating voltage at the voltage test point are all normal. Observe whether the power supply indicator of each board and module is in normal state (If the indicator is on, the power supply is normal. Or else, the indicator is damaged or power failure occurs.) In case of any abnormality, switch off the pow er immediately. When the fault is cleared, power on them again in the above sequence.

If all of the boards are normal, the preliminary check of them is completed successfully.

When the above tests are passed, it indicates the BTS power supply system is normal.

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