Coaxial Marine

The term waterproof means something that will work in spite of any amount of water thrown on it, even amidst temporary sinking. This quality depends on the time, and on the depth of water.

Waterproof marine audio components are invaluable for boaters who are expected to stay around lots of water for a longer period of time. Actually a waterproof speaker is also popularly known as a marine speaker that is an invincible part of stereo sound in a wet environment.

Broadly, waterproof speakers can be divided into four main categories: dual cone speakers, coaxial speakers, component speakers, and sub-woofers. Dual cone speakers are those that have only one driver or sound output source, but use two different cones that come in large and small sizes. The larger cone is meant for mid-range and low frequencies while the smaller is for high frequencies. This kind of speakers work fairly well but lack the capacity for a broad spectrum of sound frequencies. The buyers often consider these because they are cheap.

Coaxial speakers are also known as 2 way or 3 way speakers. They use multiple drivers to handle different frequencies. The term coaxial means that one speaker is wrapped around with another speaker. The tweeter that handles the high frequency is situated in the middle of the speaker and surrounded by a woofer that handles mid range and low frequencies. The coaxial speaker delivers better performance than a dual cone speaker, but sometimes the components are not necessarily as good as that of a component speaker.

The third type of waterproof speaker is component speaker that is actually more than one speaker. The configuration of this speaker is set up in such a way that the higher and the lower frequencies are each handled by completely separate speakers. Through crossover the frequencies are divided electronically so that each speaker is required to produce its own quota of frequencies. So, this definitely helps in the best sound production.

The fourth type is the sub-woofer that is designed only to set the bass frequencies. Actually sub-woofers are meant for heavy thunder like sounds, but the use depends on the opinion of the user because a good quality coaxial or component speaker can produce the same sound effect as the sub-woofer does.

Now while choosing waterproof speakers certain points should be kept in mind. Considering a cutout size is an important point, especially if existing speakers are being replaced with the new one. This will help the buyer to cut short in search because the person knows what to buy.

If the new speakers are to be installed the measurement of the area is very important so as to get an idea about where we can place them. Since larger speakers have the tendency to deliver better sound performance, we must try to find the largest space possible. The depth of the space behind the speaker should also be ensured so that the heat that is generated will be cooled down. Thus, the cables will be saved from melting.

Considering speaker quality is another important thing to be kept in mind. The quality of a speaker depends upon the frequency range of sound that it is able to reproduce. One example would clear this point. For instance, take the difference between a telephone speaker and a stereo speaker. The telephone speakers produce mid range frequencies that are all right for human voice but for realistic high quality sound we need much more bass and treble.

About the Author:

Victor Epand is an expert consultant for music gear, speakers, and microphones. You can find the best marketplace for music gear, speakers, and microphones at these 3 sites: music gear, guitar, synthesizers, waterproof speakers, marine speakers, stereo speakers, and microphone.

Article Source: ArticlesBase.com – Special Features And Advantages Of Waterproof Speakers

Marine Radio LMR400 Coaxial Cable UHF VHF RF PL259 25ft $36.97

Today, GPS is more commonly known by the vehicle navigation solutions. However, the GPS system can be used for many other useful purposes. For example, many computer network time synchronization solutions, such as NTP time servers, use the atomic clocks aboard each satellite GPS for precise timing. The GPS system can be used as an accurate reference clock for synchronization of time-critical applications on computers and networks. This article describes how computer systems can use the GPS time and analyze what equipment is required to provide a precision time reference.

The GPS System is a United States military for world shipping. GPS is a space system consisting of a network of 24 satellites in orbit. Precise navigation and positioning is accomplished using precision timing signals and triangulation from several satellites. Each satellite orbit has an integrated atomic clock timing reference to provide ultra high precision time. Each satellite transmits data in time within some nanoseconds of the correct time to provide a positioning accuracy of better than 10m. This moment information can be used by NTP time servers and other Synchronization of computer equipment as a time reference of high precision. The great thing about GPS is that it works anywhere in the world and is totally free of air service.

Each GPS satellite transmits a radio signal low-power below the surface of the Earth. Two separate frequencies are used, designated L1 and L2. The band is L1 civil signal, transmitted at 1575.42 MHz L2 is the frequency of military, intended for ultra-high precision positioning. The radio signals transmitted from the satellites in the line of sight. The transmitted signal is easily powerful enough to pass through clouds, glass and plastics, but most is absorbed by the major material such as bricks, tiles and metals. The ideal location for a GPS antenna tends to be outdoors and ideally on a roof with the best possible view of the sky.

With the advent of GPS navigation equipment for the mass market, antennas and GPS receivers can be obtained at very reasonable cost. A GPS antenna is used to receive and amplify radio signals from GPS. While a GPS receiver decodes the information and presents it in a computer readable format. Many antennas are available with integrated receivers, but these have the disadvantage of only providing a few meters of cabling machine NTP time server or system computer. Marine Antennas are designed to withstand the worst of time, usually at one pole screw thread to provide a secure mounting system. These antennas provide the best solution for static time applications.

The GPS receiver is usually integrated into the NTP time server or encapsulated within an enclosure. A GPS receiver is a small device that amplifies Elecronic receives GPS signals from an antenna through a coaxial cable. The receiver decodes these signals and provides computer-readable output usually through an RS232 or USB interface. Most receivers provide decoded information, such as position, visible satellites, accurate time and a precise reference time pulse output.

The coaxial cable is used to provide a connection between the GPS antenna and receiver. The cable distance can be critical. The antenna of the GPS signal must be amplified enough to overcome cable losses associated with the cable run used. Improved quality of antennas generally provide more amplification (gain), plus The high quality coaxial cables can be used for signal losses much less per meter of cable that allows relatively long between an antenna and receiver. To extend cable GPS works even more amplifiers can be used to increase the signal transmitted by coaxial cable. Typically, a GPS amplifier can be found online on the coaxial cable and is powered from the receiver. Amplifiers can use multiple for extremely long cable.

A roof mounted GPS antenna can be prone to lightning and power surges. It is recommended that surge suppressors are used to protect NTP time server and expensive timing systems from damage. A surge suppressor is essentially a barrier that can be found online on the wire coax between the antenna and receiver which protects the recipient of any potential damage due to voltage spikes.

In summary, the GPS system provides a reference time of high precision NTP time servers and other computer equipment synchronization. This is an outdoor reliable service that can be used anywhere the world. And with the rise of car navigation systems of the technology needed to receive transmissions from GPS is continually falling in the price.

About the Author:

The author of this article, Dave Evans, provides a technical authoring service to a number of computer network timing hardware manufacturers. Dave’s expertise in the field of atomic clock, NTP server and time server systems has led to him becoming a leading author in the field. Click here, if you would like to read more about NTP time server solutions.

Article Source: ArticlesBase.com – GPS Systems for Ntp Time Servers and Timing Applications