vsat dish
4. Cable and connector
Intermediate facility link cable transmits the signal between the antenna and computer room. Check if these cables are damaged. If there’s something wrong with VSWR or insertion loss, the user should test and check whether the cables need to be replaced or be repaired.
When repairing the cables, the user can splice them in the new position, but it can cause some signals attenuation. With s Time Domain Reflector (TDR) 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 doesn’t comply with the cable specification, it should be replaced.
Ensure the IFL cable and other cable support and routing (positioning and bending radius) accord with the manufacturer’s technical requirements. Replace the lost, rust and corrosive backup supports. When supporting IFL cables, it is better 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 manufacturer’s recommendations.
If the stainless steel link or clip is not useful, and the cable manufacturer haven’t 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 IFL connectors and connection parts. Replace the connectors which appear fracture line, line antihypertensive or other problems. If IFL cables come from the catheter, the user should check the catheter and other connectors. Check if the catheter input is strict, if there’s 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 system inflation pressure is not enough, corrosion can change the signal-to-noise ratio to affect the signal or cause the antenna stop working.
5. Shutdown Maintenance
Some maintenance work should be done when the antenna don’t stop working, but most of the maintenance work need to be done after the antenna stop working. For example, when moving the antenna or cut down IFL line, the user must shutdown the antenna. First check the antenna azimuth and elevation bracket. Look if there’s some fracture and hardening phenomenon for the protection cover of the support 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 considered as part work of daily check in each year, except Antesky Science Technology Inc Have another regulation. When doing the maintenance, according to the maintenance period table of Antesky Science Technology Inc (Antenna Manufacturer: clear the support screw, and lubricate the oil.
If the user finds the support 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 Antesky Science Technology Inc note that the special requirements and suggest 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 connection should be fixed. If due to improper maintenance of the equipment, Antesky will not be responsible for warranty.
6. Maintenance Record
Keep a maintenance record. At the beginning of installing the antenna, leave a record with date and photos. Then maintain once, keep a record once, so as to keep a complete antenna system record.
In the antenna valid life keep a record of antenna pattern so as to find the phenomenon of the system signal dropping.
If it is required to shut down the antenna and do the maintenance, you’d better arrange the maintenance work when the antenna doesn’t work or within one hour at off-peak period. If the antenna can’t stop work, transfer this antenna’s work to another temporary earth station antenna.
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