Henan saves Zu Qing of Zhao of microwave communication bureau
System of route of day make a present of is one of main component that microwave relay corresponds. The move since aerial changes the electromagnetic wave that transmits in line of make a present of the electromagnetic wave that travels for free space, or the action of the electromagnetic wave that in changing the electromagnetic wave that free space transmits the line that it is make a present of, transmits. And the transmission passageway that line of make a present of is electromagnetic wave. In much radio frequency channel common the microwave relay of system of route of day make a present of corresponds in circuit, index of the specifications of system of route of day make a present of, quality is affected directly common the communication quality of the each microwave radio frequency channel of system of route of day make a present of.
The installation of line of day make a present of is checked
System of route of day make a present of is debugged in installation when, want to debug technical standard strictly to undertake according to construction. Because there is take cover engineering in the installation process of system of route of day make a present of, once take cover engineering appears quality hidden trouble, can be the following safeguard leave future trouble. This one phase should control installation strictly to debug quality, the construction that has made the following field checks the work:
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1. There cannot be collision when the iron tower on line of aerial, make a present of, prevent to suffer force to be out of shape, influence specifications.
2. By construction blueprint paper checks the height that aerial installs and position, each installation part is important solid is good.
3. When line of make a present of bends and be being turned round, radius of bend and turn round angle to want to accord with manufacturer of line of make a present of to ask.
4. Flange of the line that do make a present of dish when, want serious and careful, cannot take broken copper bit inside conduit of wave of line of make a present of. When line of make a present of and antenna join, contact cannot get power, want natural butt joint. Must not rely on screw forcedly to be pulled by force receive forcedly, lest line of make a present of or source of line of aerial make a present of are long-term,get power and damage. This one link should avoid quality hidden trouble.
5. Ground connection of line of day make a present of wants reliable and good. Ground connection device and iron tower galvanization join must first tin-plating, line of every make a present of should have 3 to handle ground connection, the position is aerial backside respectively, before the iron tower on line of make a present of is in 1 meter and line of make a present of enters a computer room.
6. Line of make a present of is secured should firm, fixed span must not exceed every 1.2 meters of requirements that secure, blow with preventing line of make a present of to suffer fresh gale for a long time to blow swing and damage.
Line of day make a present of is debugged
1. Aerial azimuth adjusts: In post a letter end sends a standard n, adjust repeatedly send and receive aerial, make collection n achieves design requirement.
2. Standing wave compares (S) : In complete frequency paragraph inside, the standing wave that carries line of the make a present of that measure a nature on the head in microwave frame is more than than answering 1.15. If do not accord with index, should check line of day make a present of whether does each connect match good, line of make a present of radius of bend, turn round angle to whether accord with a requirement.
3. Alternate polarization goes lotus root spends (XPD) : This one index to be the same as frequency different polarization answer is used reduce alternate polarization interference to have main effect. In the test if index is unqualified,can adjust the polarization direction that sends and receive source of make a present of of two stations antenna.
4. Attenuation of line of make a present of: Attenuation of line of every make a present of is worth cannot prep above designs a value. If unqualified should check line of make a present of to have suffer force to be out of shape without collision, whether does contact match good. Humidity of the environment when be like construction is too big,
5. Aerate baric: Aerate baric value is 1300Kpa, via 24 hour hind not under 1100Kpa. Should check line of day make a present of otherwise sealed good, inflator job is regular.
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Breakdown of system of route of day make a present of is handled
In much radio frequency channel common the microwave relay of system of route of day make a present of corresponds in circuit, breakdown of system of route of day make a present of basically has two features. It is, when breakdown common each radio frequency channel of system of route of day make a present of appear at the same time same breakdown phenomenon. 2 be, breakdown of system of route of day make a present of is collection n to drop to lift with circuit noise in the expression in circuit. Common breakdown has: Aerial azimuth deflection; Collision of line of make a present of is out of shape; Sealed and lax drink water; Polarization goes lotus root spends next demote. Can be being judged according to breakdown feature in safeguard is why to be planted breakdown, again complementary check with necessary appearance, analytic judgement gives breakdown reason and position.
As microwave communication is worth the development that defend to nobody, the net is in charge of a system to waited to provide the monitoring management with powerful function to quality of the equipment in circuit and circuit, but had not provided monitoring function to system of route of day make a present of. The tentative idea brings into system of route of day make a present of monitoring management, be sure to rise maintain efficiency and quality. According to real need, two monitoring point are set in system of route of day make a present of. It is to aerate part, come true this are relatively easy, because inflator contains Yao to believe interface but will aerate baric change circumstance conveys to provide a system to the net; 2 it is aerial azimuth, in be being safeguarded actually, this also is the position that gives trouble more easily. Can pass right common n of collection of each radio frequency channel has system of route of day make a present of detect, setting collection n and aerial azimuth correspondence concern, indirect reflective antenna azimuth concerns a situation.
Through the analysis above we can see, system of route of make a present of is signal of microwave much radio frequency channel is common passageway. The stand or fall of index of its specifications, quality affects the quality of microwave communication circuit directly, breakdown affects bizygomatic breadth. Systematic work ambient conditions is harsh and cannot accuse, snow of fresh gale, rain, thunder is affected to line of day make a present of very big, serious when line of make a present of of meeting attaint day, must make line of fine day make a present of defend the job. Installation debugs quality is the foundation that stability of system of route of day make a present of works, in engineering construction once have quality hidden trouble, the meeting is right the following safeguard cause serious consequence, once system of route of make a present of damages, repair time is long, breakdown last a period of time is long.
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