1.4 adjust antenna

8/10/2019 1.4 Adjust Antenna

http://slidepdf.com/reader/full/14-adjust-antenna 1/38

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Security Level:

www.huawei.com

Adjust Antenna



CONTENT

• Basic Knowledge

• Adjustment Preparation

• Adjust Antenna (0.3&0.6m/1.2m/1.8m)




RTN different outdoor solution

New antenna+ new ODU+ new IF+ new IDU




Basic Knowledge

• Main Lobe and Side Lobe

Vertical azimuth diagram




Basic Knowledge• Locating the Main Lobe

The main lobe width of the microwave antenna is narrow, that is, between 0.6° and 3.7°

generally.

Antenna movement across the main lobe will result in a rapid rise and fall of signal level.

Horizontal section of the antenna




Basic Knowledge

• Tracking Path

Side lobe signal readings can be mistaken for main lobe readings when signals are

tracked at different elevations (or azimuths).

Several adjustments are required so that the three signal peaks of line AA' can appear.

Three tracking paths




Basic Knowledge

• Antenna Aligning

CorrectWrongWrong

The objective of antenna adjustment is

to align the main lobe of the local

antenna to the main lobe of the opposite

antenna.



CONTENT

• Basic Knowledge

• Preparation

• Adjust Antenna (0.3&0.6m/1.2m/1.8m)




Adjustment Preparation• Tools




Adjustment Preparation• Plan Document




Adjustment Preparation

RSSI test interface

Select 20V.

• Connect multimeter with ODU RSSI Interface



CONTENT

• Basic Knowledge

• Preparation

• Adjust Antenna (0.3/0.6m)




Adjust Antenna (Potevio 0.3/0.6m)

Prepare

Determination

of coarse

azimuth

Primary

Alignment

Fine

Alignment

Fine

Alignment

Fasten

Antenna

•

Adjustment Flowchart:





•

Determination of coarse azimuth:

If opposite antenna can be reached by eyes, we will apply eyeballing to

determine coarse azimuth.

Conversely, if opposite antenna cannot be reached by eyes, we will use acompass, according to plan design document, to confirm coarse azimuth.





•

Primary Adjustment

Appropriately loosen four nuts①

on the clamp② of the antennamounting bracket.

Push antenna softly with human

force, then the antenna can be

revolved around the mounting pipe.

Coarse azimuth adjustment:





•

Primary Adjustment

Loosen 4 screws which are used to fix antenna and pole.

Push antenna softly with human force.






•

Primary Adjustment

Rotate the antenna widely in the horizontal direction,scan the received power, until

multimeter test value increase, and stop at the max value (about 1V).


Horizontal 180°





•

Primary Adjustment

Fasten 4 screws which are used to fix antenna and pole.






•

Fine Adjustment

Keep the remote antenna fixed.

Slightly adjust the azimuth of the antenna, in the horizontal direction.

Fine azimuth adjustment:





•

Fine Adjustment

Scan the received power, until the multimeter reach the max value then stop.

Fasten the screws.


Horizontal 30°





•

Fine Adjustment

Fine Elevation Adjustment

Appropriately loosen top and bottom

connecting bolts① between antenna

and mounting bracket, rotate elevation

adjusting bolt② to make the antennaelevation adjusted.

The range is±15°. Remember to

lock the above standard units.





•

Fine Adjustment


Loosen the screws.





•

Fine Adjustment

Rotate elevation adjusting bolt to make the antenna elevation adjusted.

Scan receive power, and stop at the Max value position, then fasten local antenna.

Elevation adjusting bolt


V er t i c al 3 0 °





•

Fine Adjustment

Adjust remote site antenna, until the received power reach the Max value.

Repeat the fine adjustment steps, until the received power value meets the planed

received value.





After antenna alignment, please confirm that every standard accessory is locked.

Attention: You should keep the received power value is Max value, while fastening the

antenna.

•

Fasten Antenna



CONTENT

• Basic Knowledge

• Preparation

• Adjust Antenna (1.2m)




Adjust Antenna (Potevio 1.2m)

• Primary Adjustment


Uninstall the azimuth fine adjusting bolt

① and the connecting bolt③, and then

loosen appropriately nuts⑤ on U-bolt④

of hanging bracket and fixing screws onstrengthening rod, see figure 11.

Rotate antenna or/ strengthening rod by

human forces so that antenna could

make azimuth adjustment surrounding

mounting pipe.





• Fine Adjustment


Move the two adjusting nuts② on fine

adjusting bolts forward and backward. If

azimuth-adjusting scale is insufficient,

customer could continue adjusting bychanging position of the anti-fall angle

iron on mounting pipe. The range of fine

adjustment is±10°.

It is necessary to fix hanging bracket with

U-bolt as changing position of the anti-

fall clamp on mounting pipe. Please locktightly all involved loosened parts

immediately after completed adjustment.





• Fine Adjustment


Loosen the tightening elevation

adjusting bolt③ appropriately, and

then rotate the two nuts② on item①

with involved tools. The range of fine adjustment is

±10°,.



CONTENT

• Basic Knowledge

• Preparation

• Adjust Antenna (1.8m)





• Primary Adjustment

Azimuth adjustment:

loosen appropriately the nuts on U-bolts

of hanging bracket and fixing bolts on

the adjustable rod.

By human forces, push antenna tomake it rotate around the mounting pipe,

so the azimuth adjustment is done.

Remember to lock all the standard

accessories.





• Fine Adjustment

Elevation Adjustment

loosen the two connecting angle irons①

on hanging bracket, and then rotate the

two nuts③ on elevation adjusting screw

② with a wrench. So the antenna iselevation adjusted.

The range of fine adjustment is±5°.




• Type 1: Antenna Bracket

Elevation AdjustingAzimuth Adjusting







Elevation Adjusting






Elevation AdjustingAzimuth Adjusting






Elevation Adjusting






Azimuth Adjusting



Thank youwww.huawei.com

1.4 adjust antenna

Documents