The simple maintenance for earth station antenna can sell out the antenna failure probability and expand the antenna life, so a regular and perfect antenna maintenance planning will be helpful for the antenna general operation.
Appropriate maintenance planning is a kind of market insurance. Check the completion of the whole structure and ensure the general operational potential by the simple and low-cost covering maintenance; Check the electrical performance, and comply with the maintenance regulation in the fabricate operational maintenance manual so as to sell out the occurrence of antenna failure.
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Our enterprise summarize many years sense of production and maintenance of Earth station Antenna and combined with the feedback of many customers from all over the world to create the daily inspection manual. We hope this manual can help the antenna users.
1. covering Maintenance
Check the perfect paint covering and electroplating surface, as well as fixed structure. First rub the rust spot on the electroplating covering by metal wire brush or polisher paper, and then coat a layer of zinc-rich coating or a layer of rust inhibitor which will not need the perfect clearance of the rust.
The user should mend it even if only a petite of the stop peeling or color fading, or it will come to be more and more serious. And the user must accord with the antenna builder regulation for the paint covering and coating specification, because the wrong coating method will influence the signals accept. For example, the dark-colored antenna reflector surfaces can absorb easily, and so it can give rise to high temperature, which can cause the signal distortion. Too much lead paint can make the signals loss by attenuation or scattering.
2. Antenna Fasteners
The nuts, bolts, rivets and other fasteners in the premise will be affected by atmospheric effect or internal corrosion. Regardless of any corrosive components and the error premise will be found in the disposition maintenance. At this time the users should tighten the loosen nuts and replace the lost, rust and corrosive components.
With the American community for Testing and Materials fabricate A325 or other occasions of conflict components, the user must replace the loosen or corrosive components, because in the process of re-tightening it will make the fasteners get the reuse term. Also the corrosive A325 metal parts should be substituted not be tightened.
Often there are pins inserting in the pivots of the adjustable antenna bracket. Check if the activities of these jointing are flexible, and lubricate the oil by a grease-gun with oil jet. If the antenna rotates not flexibly, the user should replace the pin.
Check the metal fasteners on the antenna reflector and back structure. Except American community for Testing and Materials fabricate A325 must be replace, the user can tighten the loosen parts. The lost, rust and corrosive fasteners should be replaced. These check processes are also favorable for the operational platform when assembling the antenna, as well as assisting the reflector and reflector support.
3. Ground
No matter how high the buildings, the antenna and bracket should be grounded to preclude the lightning strikes. inspect if the mechanical of grounding ideas and no mechanical association are connected.
Analyze if the grounding association is connected by the earth loop impedance instrument. According to the test results the user can decree the cost of the excavating work. Check if the mechanical grounding parts are rust, corrosive or loosen. Replace the rust and corrosive fasteners so as to limit the inductance value.
Unload the grounding sharp dogleg head on the antenna or bracket. According to the test results decree whether adopt auxiliary grounding measures.
On the place which can use the step auto-tracking device, check whether the pedal is level by a longitude and latitude stadia. If the pedal is not level, it can influence the antenna position calculation. Adjust the level nut under the base plate to make the antenna keep level.
If the anchor bolts preclude to adjust the pedal level, adjust it while fixing the antenna. After adjusting, check if the cement sealing of the antenna foundation and anchor bolts crush and shift. If it is damaged, even a little, also should be repaired. After adjusting, the controller should be programmed again.
If some devices are mounted in the antenna box which is on the back of the reflector, check if there is accumulated water or a large whole of termite or rodent infested in the box. mend or seal the crack, even if it is little. If the user do not care about it, ants, mice and other animals will cause improbable losses.
4.Cable and connector
Intermediate premise link cable transmits the signal between the antenna and computer room. Check if these cables are damaged. If there is something wrong with insertion loss, the user should test and check whether the cables need to be substituted or be repaired.
When repairing the cables, the user can splice them in the new position, but it can cause some signals attenuation. With Time Domain Reflector check the position of the broken line. With a voltage meter check all the cables and connectors of the electrical properties and connectivity.
The coaxial cable with a bend head in excess of the minimum bend radius should be tested. After testing if it does not comply with the cable specification, it should be replaced.
Ensure the I F L cable and other cable sustain and routing (positioning and bending radius) accord with the builder technical requirements. Replace the lost, rust and corrosive backup supports. When supporting I F L cables, it is good to use stainless steel cable link or cable clamp than the plastic rope. Stainless steel link should be used to fix the elliptical waveguide. inspect the cable builder recommendations.
If the stainless steel link or clip is not useful, and the cable builder have not specified any stainless steel link or clip, in this case the user can only use black nylon rope, the white or bright-colored rope is easy to be fragile in the sun. The user should always check the cable rope, because the nylon rope is easy to be loosen than stainless steel clip.
Check the I F L connectors and association parts. Replace the connectors which appear fracture line, line antihypertensive or other problems. If I F L cables come from the catheter, the user should check the catheter and other connectors. Check if the catheter input is strict, if there is accumulated water in the catheter, the water will freeze, which will squeeze the cable broken.
Check the feed combiner flexible elliptic waveguide line, if it is damaged, replaces it. If the ideas inflation pressure is not enough, corrosion can change the signal-to-noise ratio to influence the signal or cause the antenna stop working.
5. Shutdown Maintenance
Some maintenance work should be done when the antenna do not stop working, but most of the maintenance work need to be done after the antenna stop working. For example, when animated the antenna or cut down I F L line, the user must shutdown the antenna. First check the antenna azimuth and elevation bracket. Look if there is some fracture and hardening phenomenon for the security cover of the sustain bracket, if need, replace it.
For the motorized antenna or the antenna which points to a Satellite for a long time, sometimes those antennas also need to be moved. This step can be determined as part work of daily check in each year. Have other regulation. When doing the maintenance, According to the maintenance duration table of Ant our enterprise clear the sustain screw, and lubricate the oil.
If the user finds the sustain bar moved on one position and was wear, it should be adjusted. When rotating the antenna, ensure that mechanical limit switch can stop after antenna motor finishes the planed journey. The limit switch malfunction can make the antenna rotate continuously until it will be damaged or hit with other objects.
Check the operational maintenance of the Antenna Manufacturer,note that the extra requirements and propose when to lubricate the oil or when to inject the oil for the azimuth, elevation, polarization and other motors. Antenna motor wire box should be dust-free and moisture-proof and all the association should be fixed. If due to improper maintenance of the equipment, our enterprise will not be responsible for warranty.
6.Maintenance Record
Keep a maintenance record. At the starting of installing the antenna, leave a description with date and photos. Then voice once, keep a description once, so as to keep a perfect antenna ideas record.
In the antenna valid life keep a description of antenna pattern so as to find the phenomenon of the ideas signal dropping.
If it is required to shut down the antenna and do the maintenance, you should good arrange the maintenance work when the antenna does not work or within one hour at off-peak period. If the antenna can not stop work, exchange this antenna work to other temporary earth station antenna.
7. About our company
Our enterprise is a global victualer of communications systems equipment and services. Major markets are earth station antennas - which includes Satellite transportation antennas, receive only antennas, flyaway antennas.
For supplementary information, please send an email to us.
The Maintenance of Earth station Antenna
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