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    • EMF Meters

      EMF Meters

      An EMF meter detects and measures an electromagnetic field. There are many types of EMF meters and they have many uses, including ghost hunting. Most EMF meters are “AC EMF meters” and can only detect the rate of change in an oscillating magnetic field. However, commercial grade EMF meters that can detect specific electromagnetic frequency

    • Radio Repeater

      Radio Repeater

      Portable radios are limited in the power at which they can transmit, usually somewhere between .5 watts and 5 watts. A very rough rule of thumb is that one watt equals one mile of range over flat and open terrain. Buildings and mountains will, of course, greatly modify effective range. When two radios communicate directly

    • L band

      L band

      L band is a fequency range between 390MHz and 1.55GHz which is used for satellite communications and for terrestrial communications between satellite equipment. The high frequencies utilized by C band, Ku band, and Ka band would suffer from high signal loss when transported over a copper coax cable such as an Intra-Facility Link. An LNB

    • Thermoelectric Generators

      Thermoelectric Generators

      A thermoelectric generator is a solid-state device that works similar to solar panels but converts heat, rather than sunlight, directly into electricity. A thermoelectric generator is usually made of bismuth telluride semiconductor junctions that are only several millimeters thick. This differs drastically from the bimetallic junctions that were previously used, which were much thicker. Thermoelectric

    • Baud Rate

      Baud Rate

      Named after Emile Baudot, the inventor of the Baudot code for telegraphy, a baud is a unit that is synonymous to symbols per second. Therefore, if there was something with 15 Bd, that would mean that something had 15 symbols per second. Not to be confused with bits per second, the baud — which, when

    • How to Install a Car Audio System

      How to Install a Car Audio System

      Those on a tight budget and would like to save possibly hundreds of dollars on installation costs and those who would like to customize their car audio system may want to install the car audio system themselves. Whatever the reason, it is quite easy to install a car audio system and here are some tips.

    • DVB-RCS

      DVB-RCS

      DVB-RCS stands for Digital Video Broadcast – Return Channel Satellite. DVB-RCS is part of the DVB standards for satellite communication, DVB-S and DVB-S2. The purpose of DVB-RCS is to provide a return channel to enable Internet and other data services over satellite. ViaSat’s LinkStar system is one of the VSAT satellite broadband implementations which support

    • What is a Clock Generator?

      What is a Clock Generator?

      A clock generator is a type of circuit that produces a continuous, synchronized electrical signal for timing purposes in a wide variety of devices. Because many high end electronic equipment require that electrical signals and mechanical devices work together in an efficient manner, clock generators are often a necessary component in many devices in order

    • Satellite Dishes

      Satellite Dishes

      The major types of satellite dishes include motor-driven dishes, multi-satellites, VSAT, and ad hoc satellites. Other types include DTH, SMATV, CABD, automatic tracking satellite dishes, and big ugly dishes. A motor-driven satellite dish is mounted on a pole which rotates around an axis to detect and receive various satellite signals in the sky. It is

    • Do I Need a License to Use one of these Radios?

      Do I Need a License to Use one of these Radios?

      All radio spectrum is legislated or controlled. The FCC requires licenses to operate on some bands, and lets other frequency bands run unlicensed. Radio Services Which Require a License Some of the licensed radio services include: Acronym Full Name URL HAM Amateur http://wireless.fcc.gov/services/amateur/ GMRS General Mobile Radio Service http://wireless.fcc.gov/services/personal/generalmobile/ Radio Services Which Do Not Require

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