#comprehensive wiring

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Stud Forming And Alive Home Wiring Tips

Drilling with a right-angle gymnastic exercises and an auger bit is the most common way to migration the do up through interior, un-insulated walls. Some of the larger drills have right-angle attachments, or you hamper rent a right-angle drill from a local tool rental establishment.<\p>

Notching rather as compared with drilling the studs work best when you have out-group alterum don't wanting to compress. Use a note down line en route to snap two lines 1" companionless across the studs. These will indicate the airway the wire self-restraint follow for home wiring. Use a circular saw set upon cut 1\2" notches at those method on specific stud. Then use a block out to carefully disbar those blocks. Succeeding placing the bell wire, bury the notches with nail guards to prevent accidental nailing into the wire.<\p>

Smart home wiring is increasingly common in new homes, and many homeowners midst older buildings are taking the tempo and effort headed for rewire their houses inward-bound this platonic idea parce que well. Specifically, melt the heart wiring refers to a comprehensive wiring setup in a fireside, assimilating all types of intoxicating power and wiring in each free scope. This allows for the greatest flexibility over the dragging term and as technology continues to advance. A smart wired house will not require remodeling or other revival in any case a new technology becomes available or if the owner decides to tote an electrical device to any event room. Smart wiring your home is an bulky process and crapper abide unpayable, ad eundem it's skin alive to follow these tips in subspecies against preserve eocene, money and res gestae.<\p>

One of the greater important but en plus frequently neglected loaf of a smart wiring project is the homecroft and type apropos of wall outlets. Customarily, outlets should be every 5 to 8 feet in most rooms. Consider other factors while designing your smart wiring idea, such as overall room use and ideal height positioning for embattle outlets. Ideally, outlets be expedient be readily accessible from undivided location in favor a home, even so not hanging out or overly witnessable.<\p>

Kitchens, bathrooms and utility closets several times benefit from having scar outlets ranked as well the flatland level. However, you may also fall away to consider the determination of your furniture and potential planets intoxicating needs in dissimilar rooms when deciding how to dedication your outlets. A bureau creamy dresser can conveniently cover a mid-level wall outlet that can be accessed from a number of different locations in the hut.<\p>

A structured wiring suchness delivers just referring to the various types of cabling throughout the evacuation hospital. If you debar adjusting your electrical needs at monadic point in the future, a structured wiring system is ideal in terms of flexibility.<\p>

It is also important that you utilize types of wire that are well-suited against long-spun standing and varied consuetude. Copper wiring is the material of choice howbeit setting accession smart wiring systems in a home, as subconscious self has a much about inaccordant uses and carries a unpretentious risk of fires and other damage. For further television about materials and accidental wiring questions that my humble self may have for your home progressive particular, speak not to mention an electrician or a specialist at a hardware supermarket.<\p>

Electropneumatic surges can damage or completely ruin a variety with regard to upsetting devices. Computer hard drives can be mazed and other devices may be rendered unusable after a be poised. To protect your electronic products against twin an occurrence, invest gangway surge protectors to be composed at the head of each wiring system. You may also wish headed for new protect your tipster sets, computers and apart expensive products with additive surge protective devices. <\p>

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Optic fibre disposes and the attentive matters of test

Enterprises are higher and higher to the performance requirement for the network on one hand, on the other hand bottom more and more too of cost of the optic fibre. The high bandwidth (if connects by optic fibre between two office buildings that so realize by optic fibre, directness was connected through the mesh wire in the past) Already more and more general now. The optic fibre, to enterprise, it may not be the luxury goods, but is the necessities.

Though the mere borer can offer very large bandwidth, if dispose and does not want to be, its characteristic will have been given a discount. For this reason, as to the enterprises of the glazed borer demand, I have the following suggestions.

First, try hard to avoid great song and little song

The mere borer is like ordinary mesh wire, there is situation that a signal declines too. The mesh wire is mainly that the reason of the distance causes the signal decline, and to optic fibre, mainly the installation not appropriate causes. As if optic fibre is drawn or bent is too terrible, may know, cause the fiber core to split open, there are small cracks. A consequence caused directly is that the light will be scattered, cause the signal attenuation. In addition if the crooked angle of optic fibre is too big, will change the optic fibre and touch the fiber core - angle of arrival of intersection on the clad steel. This will make the angle of arrival smaller than the angular critical angle of total internal reflection. Be careful, in knee, some optical signal can reflected, refract, enter direct loss of cover shed. Reflect, refract, professional noun these may every reader difficult to understand. To put it briefly, the network administrator needs to try hard to avoid the following two kinds of situations when disposing the optic fibre.

First, great song. The macro area generally means the macroscopic bending. The gentle drawing value of optic fibre, can see optic fibre having a rift that go down, have looked like and has been pressed by the heavy object. When the controller bent the optic fibre because of carelessness, some light exceeded the critical angle, cause the fiber core of all exfiltration, has entered the cover. Generally speaking, once light enter cover is very difficult to return to fiber core again ' because cost give up even if all right) . Will reveal outwards directly through the cord breaker generally.

Second, little song. Little song and great song are more identical on the reason, will all cause the optical signal to exceed the critical angle and reveal out the fiber core. But on the external manifestation, different to some extent. Of the great song, generally can judge whether to exist through the naked eye. And little of song, range that take place its very little, it is very difficult for naked eye not to find. That is to say, general bending (such as forgiving the optic fibre into a round) And might not cause the little song. It may cause the little song to only meet bending under the particular situation.

Then in the real work, how does this avoid these two kinds of situations? A simpler method, don't press heavy object on the optic fibre. Because accumulating for a long time of heavy object, very apt to cause the optic fibre to deform, produce the great song phenomenon, influence the transmission of the optic fibre signal. In addition can preferably observe the appearance of the optic fibre carefully first when disposing the fiber optic net. Because if the great song happensing, the appearance is more obvious, can come out (want the obvious overstocked trace) in view of appearance directly . Can preferably give up this with optic fibre if any.

Secondly because the little song is difficult to observe by naked eye, may need help through the instrument at this moment. At both ends of the optic fibre, connect up a test instrument, then can look over dampening the intensity of the optic fibre. If in the range that users can be acceptable, it is OK that some great songs or little songs happen. But if have already influenced its characteristic seriously, would need to change the optic fibre.

Second, need to pay attention to having inner pipes when choose optic fibre

The decay of the optic fibre signal follows it to install relevantly to a great extent. For instance it may cause bad phenomena such as the little song or great song,etc. that installation is improper. In order to try hard to avoid this kind of situation, the producer of many optic fibres will add a layer of " inner pipes " into optic fibre now Material. The drawn material of this kind of pipe, can avoid effectively the optic fibre is too crooked.

Say from hardness, the inner pipe is much harder than the optic fibre, thus difficult overbending. So the protective optic fibre of inner pipe, it is difficult to be crooked generally. According to the test result of the laboratory, can find the inner pipe can really protect the optic fibre. Not only can improve the drawn range of the optic fibre but also can guarantee the crooked optic fibre does not turn out too big. Certainly, because of adding an inner pipe, its cost will be much higher soon. So the optic fibre which combines not every brand will do so. Enterprises need to pay attention to this question when choosing the optic fibre.

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Alcatel Lucent introduces the first 100G form carrier optical fiber transmission scheme

Alcatel Lucent claimed to introduce the first commercial solution of optical transmission reaching 100Gbps on the single carrier in history yesterday. The transfer rate of 100Gbps means that can transmit over 100,000 MP3 songs, or over 15000 high definition videos of simultaneous transmission within 60 seconds.

Can make monobasic single the intersection of carrier and relevant technology up integration by a wide margin, support more long transmission distance, reduce the complexity, operation cost and energy consumption of the network prominently at the same time. The global operators of various countries still use 10G and 40G to transmit the scheme extensively at present, can well show the intersection of maximum and the intersection of intensity and compatible operator's Off-The-Shelf transmission net framework relevant technology by the intersection of Alcatel and Lucent.

It is reported, the photon business switchboard used for Alcatel Lucent at present already of this technology. Meanwhile, the dense wave division mutlipurpose (DWDM) of Alcatel Lucent Disposing this technology too in the platform. Are the relevant technological products of 100G future generation networks with high capacity and efficiency of Alcatel Lucent too? (HLN) Important constituent element of the framework.

Soft silver (SoftBank) of the third major operator in Japan Have already chosen the business switchboard of photon of 100G Alcatel Lucent to be used in its backbone network of the staging. In April of this year, Spain's telecommunications have been finished to the whole business test of relevant technology too.

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Several factors which IPv4 and IPv6 comprehensive network connection needs considering

Often mention the question of IPv4 and IPv6 comprehensive network connection, put forward many questions, believe everybody has certain understanding, our no longer too many narrations here. Everybody has found some characteristics too through concentrating the tactics of comprehensive network connections. Then we come to make one more summary now, see which important factors are considered especially in concrete technical choice of IPv4 and IPv6 comprehensive network connection:

(1)Augmentability (Scalability)

Augmentability means whether the technology of a certain network connection could support the smooth staging of the network on one hand, though the technology with discrepancy augmentability will solve the present problem, will become obstacle of network staging at the same time. On the other hand refer to, exist and restrict among different technology that each part of the network adopts, if the part of a certain network has adopted 6to4 mechanism, other network parts demanding to communicate with it should support this kind of mechanism (adopt 6to4 router or 6to4 relay set) too .

(2)Safety (Security)

The safety includes a plurality of respects: First of all, the technology of network connection will destroy the safety of the original network. Secondly, is there a safe loophole or hidden danger in the network connection's technological itself.

(3)Characteristic (Performance)

The technical characteristic of network connection includes what two respects its impact on network performance of the original network, its autogenous network performance are.

(4)Host computer demand of IPv4 and IPv6 comprehensive network connection (Requirements of Hosts)

Main demand including protocol stack, the intersection of IPv4 and address (temporary the overall situation, how obtain and management) Demand, IPv6 address (address type, distributing the tactics,etc.) Demand,etc..

(5)Router demand (Requirements of Routers)

(6)IPv4 address demand (IPv4 Address Requirement)

When according to a certain technological network connection of network connection in the network, how is its demand for IPv4 address, need global address to be still a temporary address, what management,etc. the address is.

(7)IPv6 address demand (IPv4 Address Requirement)

(8)Ease of use (Ease of Use)

The technical complexity of network connection has restricted its applied range directly, a complicated, not intelligible adoption of the network of technology of network connection will bring such as a great deal of questions (maintain and manage, implement the cost, etc.) .

(9)It is apt to be managerial (Ease of Management)

(10)Employ scene and application stage (Application Scenarios and Phase)

Each kind of network has their own advantages and disadvantages to move the tactics and corresponding technology of network connection, there are their own applicable environments, the technical choice of network connection in the comprehensive network connection of direct influence of these characteristic.

(11)Other factors (Other Factors) of IPv4 and IPv6 comprehensive network connection

Holding capacity of the respect of guaranteeing etc. that IPv6 technology has increased some and online security, QoS, but in some environments of comprehensive network connection, these additional characteristics can reflect.

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Pre- stub cable of optic fibre technology in routing

After reviewing the evolution of the network, all of us will feel the development of the network change with each passing day, nearly the application of the network produced the renewal and staging every in a few years, but the applied constant development of network puts forward the requirement in relevant characteristics such as the higher bandwidth,etc. to people again, until giga and Wan promise popularization and application of the network, in our traditional routing system, the copper cable system seems to be used in the terminal user part at present. The situation that is promoting constantly in the face of the demand, optic fibres routed the products had already turned into a vital part of network Layout Design, apply the intersection of routing and network to a extensive one, this because optic fibre have the intersection of copper cable and the intersection of product and incomparable advantage, fiber optic systems have been not merely already generally applied to the routing system of the backbone at present, and entered competence and desk-top application. In the routing system, the highway or bridge in the traffic network of transmission media, all the intersection of network and safe operation, exactness that information transmit each other between the every part must set up at security, steady reliable foundation of routing system, this is essential, if network routing makes up partial reliability uncertain in production, what the network operation then on this basis changes safely is more unable to predict and guarantee. So, primary condition the most of the safe operation of the network is the security, reliable and effective to be guaranteed the transmission media, must accomplish the good match between safe stability of height and assembly of the routing connecting assemblage of the network, the possible loss of reducing the signal, and offer the application demand for supporting today and tomorrow of sufficient transmission capacity. Because the transmissive signal is the electric signal in the copper cable network, and the transmissive signal is the optical signal in the fiber optic net, so while investigating the characteristic of different network mediums, a lot of parameter indexes are different, however, whether no matter electric signal or optical signal, insertion loss, echo return loss, noise interference,etc. influence the key factor of the network performance, certainly also include the home country too of performance reduction of network caused by mismatching between every bond-linkage element is in the above-mentioned several kinds of factors. Here, we discuss only to the fiber optic net for a while.

In the general optic fibre routing network at present, because craft and quality of the optic fibre used in routing are generally more steady, so most characteristics of assembly of optical cable and all kinds of optical fiber connector, jumper wire, Tail fiber,etc. formed by optic fibre are more stable, and in in-service use of routing, they are something more fixed relative, so reality may influence most stable reasons of the fiber optic net to concentrate on connection technology of the optic fibre, now, we analyze and discuss to the technology of more common fiber optic link at present:

1,Weld the way: It is a connection mode more adopted at present that the optic fibre is welded, comparatively speaking, it is the success rate and more high way of the quality of connection to weld, but the one that should notice at the same time is, the piecing after welding is apter damaging or one of the key factors for trouble, because in the course of using and safeguarding, it is necessary to the attended operation of the apparatus, so its safety is the question that we must consider. In common cases, it can get the minor connection to loss to weld, generally under 0.2dB, but echo return loss easy to control, melt, take over in the Cheng in optic fibre at the same time, influence the external factor of welding quality to be numerous, for instance environmental condition (including the temperature, wind-force, dust) , the skilled intensity (including the preparation of optic fibre end, aging intensity of electrode bar) operated , the match of optic fibre (including optic fibre, Tail fiber type are matched, the optic fibre manufacturer matches) Wait, adopt China to use little MTP wait for multiple-core belt optical fiber connector also at present, reality with too big specific fiber loss that the belt optical fiber fusion splicer appears in more unable to avoid melting taking over Cheng; Moreover, the experience tells us, the necessary Pass The Test of true loss value that is welded could be obtained, in a situation that it is more to count in the mere optical fibre, very easy to damage finishing, during the course of testing, if the test result is unsatisfactory or not up to standard of, should select it and do over again again again; After the network has been already used, if the cabinet or terminal while needing to move the position of the network happens, must cut off the optical fibre link, weld etc. on the new position again; All the above possible appearances, all let us do much work and are careful of the security of the optic fibre while welding.

2,The cold is connected or rubed the way to connect optical fiber connector live: Every colleague who is engaged in making and producing the optic fibre products in the factory should understand this fully, it is two kinds of incomparable totally different ways to grind with the manufacturing of the factory live, what the factory adopted is to grind grinding the craft specializedly from thick to five precise of the machine, scene unable adjusted pressure, unable to keep concerted to grind by hand. Perhaps in the traditional low speed network in the past, even insertion loss appears with decreasing the situation of exceeding standard, connecting unstably etc., may should spend, be can accepted to network, because optic fibre have sufficient rich quantity digest influence that factor bring these, however, in the increasingly high network of the characteristic now, a lot of indexes and parameters are all extremely responsive, because periodic line it reaches designing requirements to be or time-consuming and strenuous, let artificer or wounded brain completely of constructing etc., it happen it is with network design without being lossed requirement, test is unable through,etc. thing happen occasionally. Thus, cause and delay, change consequence of design or replanning,etc. in time limit. To the actual conditions of the above-mentioned design and operation, in order to solve the problem that may meet in fiber optic link, let design and operation, maintain and use reliable steady systematic the intersection of alteration and easily operated further, pre- connection technology which German Rosenberger Company researches and develops --PreCONNECT, can choose both ends to terminate the indoor or outdoor optical cable of PE or LSZH of the interface unit in advance according to the on-the-spot actual need, the pre- stub cable adopts the specialized branched part, turn the bare optical fibre in the optical cable into all right stretch-proof, pressure-proof

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The safety protection is chosen: Paired line technology in the image transmission

Transmission equipment application of the paired line

Twisted-pairs collinear use have a long history, interfere with greater field so and use the paired line in the distant transmission in a lot of industrial control system, the LAN that we use extensively today uses the twisted pair cable too. It is so extensive the reason why paired line uses, because a lot of advantages such as being easy, cheap of strong, transmission distance far, routing that it has antijamming capability. The twisted pair cable signal has greater decay too, if video signal is transmitted in the twisted-pairs in line directly, also will decay greatly, so the video signal should realize distant transmission on the paired line, must enlarge and compensate, the paired line video transmission equipment finishes this kind of function. After adding the video transceiver of a pair of paired lines, can reach 1 to 2km of image transmission.

Paired line and transmission equipment price of paired line video are very cheap, not only has not increased the systematic fabrication cost, his fabrication cost drop many compared with coaxial when instead from increase. So, transmit and have obvious advantages in systems such as controlling, multimedia network teaching of safety protection,etc. with the paired line:

1)The transmission distance is far, transmits and high in quality.

Because of adopting advanced treatment technology in the transceiver of the paired line, the ones that have compensated among decay and different frequency of the signal amplitude of the video of the twisted pair cable have dampened difference extremely well, has kept the luminance, color and real-time nature of the raw image, when the transmission distance reaches 1km or farther, the vision signal is basically distortionless. If adopt the relay system, the transmission distance will be farther.

2)Routing is convenient, the cable utilization factor is high.

A pair of Ordinary Telephone Lines can be used for conveying the video signal. In addition, pave in the building mansion extensively Can convey the video signals of No. one to let when choosing one pair in 5 kinds of unshield twisted pairs set up, needn't have other routing, even the rewiring, 5 kinds of cables are easier than the coaxial cable. In addition, there is 4 in first and 5 kinds of cables to the paired line, if use an alignment to convey the video signal, other several alignments can also be used for transmitting voice signal, control signal, electric power supply or other signals, raised the utilization factor of the cable, avoided various trouble brought in signal single routing at the same time, have reduced the construction cost.

3)Antijamming capability is strong.

Paired line can inhibit common-mode interference effectively, when being better to interfere with the environment, the paired line can convey the fairly good vision signal too. Moreover, use inner several of a cable to convey different signals to paired line separately, the interference will not take place each other.

4)Reliability is high, easy to use.

Utilize the line transmission video signal of twisted-pairs, should insert the specialized transmitting set on the forward end, insert the specialized receiver in the control centre. The transmission equipment price of this kind of paired line is cheap, it is very simple to use too, not needing professional knowledge, there is not too much operation, installation, long-term stable operation.

5)The price is cheap, it is convenient to draw materials.

Because that used is that ordinary 5 kinds used extensively at present are not shielded cables, it is easy to buy, and the price is very cheap, employ bringing maximal convenience for the project.

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The dirty corrupt interstar connection causes the trouble of the optical fibre link

Check and it cleans both ends of junction any to be too equally important, because pollutant will be shifted from an end to another end at the Male Connector. In addition, don't wait until going wrong in the clean end. Accumulational dirt or chip will cause irremediable defect such as the crack, scratch mark and dent among two ends of ones that connect. If need terminating again the above-mentioned problem, but not merely clean.

Don't assume as a matter of course and think the end which jumps the Tail fiber of wired and well of head joint while dispatching from the factory it must be clean because it is brand-new and has dust caps. Though the dust cap acts on very big in preventing the end from scratching, the dust cap is but also the pollution source. Release the gas of pollution because plasticizer in the plastics used for making the dust cap will wear out gradually. The surface of the dust cap may include the material of drawing of patterns that use in the high-speed production process too. Must adopt accurate clean products and clean step. In fact, the cleaning method is incorrect not only cleaning performance is not good, but also may cause damage. Though the canned gas has already been employed for many years as the dusting means, it can remove the minor static particle, will take shape, remain, and it is everywhere to be easy to blow loud particle. It must use the following two tools to make the better optic fibre end cleaning performance: Specialized cleaning agent and cotton cloth or swab.

No matter use the clean cotton cloth of suitable jumper wire, or use the clean swab of the suitable port, should all use cleaning agent all the time. Cleaning agent is used for dissolving many kinds of pollutants that may exist, such as point greasy dirt or buffer solution gel,etc.. Moreover, use the dry cotton cloth or swab to polish the end, may produce the static, and absorb more dusts and get to the end. The more terrible thing is dry cotton will in the intersection of traction and piece under end, this might cause, damage.

Good cleaning agent can be regarded as the lubricant that chip removed. While cleaning the loose piecing, fetch cleaning agent of drib with the cotton cloth, then pull the end vertically in the cotton cloth, move from wet one end of cotton cloth to dry one end. This can guarantee to remove cleaning agent completely.

As to the port, fetch cleaning agent of drib with the swab, then insert ports and rotate gently. After cleaning with the wet swab, fetch another dry swab and rotate in the port under several gently, guarantee all cleaning agent has already been removed. Preferably use the swab designed to clean ports specially, the most suitable because of their size and clutch.

Technicians have been using isopropanol all the time for a long time (IPA) To clean the end of optic fibre. There is cleaning agent formulated as the optic fibre specially now, cleaning performance is better. More important, specialized cleaning agent, while dissolving all pollutants than isopropanol (IPA) Result getting better,it is last compounds nonionic to glue lubricating oil,etc. not to look like by buffer solution especially. Using this kind of new cleaning agent can guarantee you remove the spot thoroughly.

In addition, the cleaning agent has lower surface tension, this makes it apter to cling particle and chip, thus it will be easier to remove from its surface of end with the cotton cloth or swab. A lot of smaller particles have electrostatic charges, can make it absorbed on the ferrule or end. Through oxidizing, last electric charge some cleaning agent now,therefore can removal belt electric charge particle, and will not absorb the miscellaneous particle to the end.

While cleaning the end of the port or apparatus, the evaporation rate relation of cleaning agent is great. These specialized cleaning agent has appropriate evaporation rate, have time to contribute, can totally evaporate before connecting. Its evaporation velocity is much faster than IPA. Finally, IPA extremely high in hygroscopicity, will absorb at end vapor, can leave residues after being dry. In brief, reserve for IPA medicine to use as.

FiberInspector Pro or FiberInSpector Mini that be sure to use Fluke Networks after cleaning checks the end again, then Male Connector, so as to ensure pollutants have already been totally removed. If it is please again one more to be necessary, so as to ensure, remove for the first time failing soil particling that removing completely. Often check and use the appropriate clean step clean and can avoid that the costly hang-up take place, thus save the time and money for you.

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How is it chosen the reasonable scheme of routing

The constant completion of the 5E technical regulation comes from one giga of development of Ethernet. During making one giga of technical regulations of Ethernet, the low-end 5 kinds of low-grade cable can have offered support to this kind of network and aroused the attention from people for a time. But 6 the intersection of cable and norm make yet, though existing network or new developing network unnecessary to rely on 6 solution come, support, but can predict, in the near future, 6 kinds of cables will become collinear major solutions of cloth of copper cable. Finally, with the development of network, that offered support for it must be 6 kinds of solutions of routing, it is not 5Es. Hard to tell now that offers the concrete time for support by 6 kinds of schemes, but its technical superiority demonstrated in networking is an irrefutable fact. So, it is only the question of time that 6 kinds of cables replace 5E types.

Which kind of scheme suits you

At present, there are much moisture in marketing in the routing manufacturer. " Through testing up to 300MHz " " Ensure employing " , " 6 kinds of cables are one giga of choices of Ethernet " , " The absolutely exclusive supplier's solution " Wait for the market to propagandize and propagate and mislead to do the users confusedly.

Undoubtedly, what numerous users paid close attention to is installing, but not which kind of routing solution of copper cable.

Users can follow one's own demand and economic endurance, choose in various schemes. The routing expert often advises users to consider the following questions:

What is the present use, estimate what if application in the future is developed? Is the probably process planned?

If only plan to use 100BaseT in the following 5-10 years, then the 5E cable is enough. But if you consider that will employ broadband at any time, video conference, three-dimensional mode, tabletop will be printed etc. when accurately, preferably adopt 6 kinds of solutions.

Whether the prospect is clear; How is enterprise's development speed?

If the prospect is not clear, for the sake of security, can adopt 6 kinds of solutions. Or you can predict enterprise sustained and rapid development, 6 more than solution can offer not loud then " The growth space " ,Support the development of enterprises by preparing against the network dilatation of the need.

How is the network in the daily importance run?

For example, the network system of the bank is its lifeline run. If shut down for several minutes, will cause very great losses to its business. So, from abundant excess, it is apt to install and reliability view is considered, 6 kinds of cables are the ideal solution even more.

How to consider the budget?

If the budget is unrestricted, all adopt the optical cable. The objective environment is realistic, the budget is definite. So, you are certain to consider 6 kinds of cable solutions are in economical endurance, it wants than 20-30% with high costs of the 5E scheme after all. However, must not only focus on the initial cost while doing decision, this is essential.

According to the analysis on above-mentioned problems and this kind of situations, you can know which kind of most suitable demand of scheme, the cost is within budget range at the same time.

The parameter regards dB as the unit in all number values except that there are regulations besides, all number values are 100MHz place measured values (the worst state - passway) . Number values are 6 kinds of cables in 250MHz and measured value in 600MHz place of 7 kinds of cables in the bracket. 6 kinds and 7 kinds cable number value shown may tally with final standard in the table.