TECH SPEAK ARTICLESDifferent strokesBy Jay M. Jacobsmeyer, P.E. In the U.S. and Canada, 911 is the official national emergency number. When 911 is dialed, the caller is connected to a public-safety answering point, or PSAP, where a dispatcher routes the call to the appropriate emergency personnel.... Using directional couplersBy Harold Kinley Understanding how they work is the key to getting the most out of them... When measurements aren't feasibleBy Jay M. Jacobsmeyer, P.E. Computer models are the next best thing for predicting radio wave propagation... Not your father's radio networkBy Jay M. Jacobsmeyer, P.E. Managing broadband capacity in a packet-based world requires a new mindset... A losing propositionBy Harold Kinley How RF attenuation on the transmission line affects the transmitter... Time is moneyBy Rob Barden Effective testing to isolate problems can save you both... Connecting on a personal levelBy Jay M. Jacobsmeyer, P.E. Inexpensive, low-power wireless devices let computer users "plug" into peripherals... Why isn't my walkie working?By Ira Wiesenfeld, P.E. The answer often is simple - and usually involves the antenna... Keeping secretsBy Jay M. Jacobsmeyer, P.E. The need for privacy spurs widespread use of cryptography in radio systems... Every toolbox needs one of theseBy Harold Kinley The RF sampler is an important test accessory for any field technician... Solving intermodulation interferenceBy Jay M. Jacobsmeyer, P.E. Common problems, real-world examples and solutions... Giving rebanding a head startBy Rodrigo Oliveira Long-term RF filtering strategies are integral to the reconfiguration of 800 MHz spectrum... Tackling interference at the siteBy Jay M. Jacobsmeyer, P.E. Transmitter, receiver and passive intermodulation are the primary culprits... The next level of intermodulationBy Harold Kinley Here's what to do when dealing with amplifier signals that are unequal... The next phase of modulationBy Jay M. Jacobsmeyer, P.E. OFDM is emerging as the choice for high-bit-rate services... Well-grounded principlesBy Jay M. Jacobsmeyer, P.E. Follow these guidelines to eliminate lighting damage... The key to RF signal amplifier specsA primer on using one of the radio shop’s most useful and versatile tools... The value of ferrite RF isolatorsBy Harold Kinley Proper use at crowded communications sites can reduce intermodulation effects... Truly a watershed eventBy Jay M. Jacobsmeyer, P.E. In the U.S., radio spectrum regulated by the FCC falls into two broad categories: licensed and non-licensed. Non-licensed spectrum is more popularly referred... An introduction to 4.9 GHzBy Jay M. Jacobsmeyer, P.E. Starting in 2003, the federal government has made available 50 MHz of new radio spectrum between 4.940 MHz and 4.990 MHz for public-safety use. This spectrum... Deciphering RF units of measureBy Harold Kinley It is imperative that wireless communication technicians understand the various units of measurement used to quantify the level or amplitude of a radio... Creating codes for indoor wirelessBy Jay M. Jacobsmeyer, P.E. Public-safety agencies face poor indoor radio coverage, especially at 800 MHz. Poor coverage is caused by both building losses and by interference from... Understanding standing wave ratiosBy Harold Kinley The term standing wave ratio, or SWR sometimes called voltage standing wave ratio, or VSWR frequently is a subject of discussions/arguments among communication... The ins and outs of traffic engineeringBy Jay M. Jaconsmeyer, P.E. Let's start with a little quiz: Rocky Mountain Radio Co. operates three community repeaters, one for each of its three customers: Poudre Plumbing, Monument... |
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