Word: analog
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...means more than the addition of new frequencies to the wireless spectrum. Unlike many older systems, which send a voice in a single stream as analog waves, PCS uses digital signals that break sound into discrete bits--the 1s and 0s that run computers. Digital technology enables PCS to offer such features as E-mail, caller ID and paging as well as compact-disc-quality sound and greater security from wireless eavesdroppers and phone-number thieves. (Digital technology is also becoming available in non-PCS formats...
...today's PCS networks can't match the analog crowd as a provider of seamless coast-to-coast calling because the new services are still fragmented and operate on three different technical standards. And you have to buy the digital phones, which a company like AT&T sells in the New York City area for $79 to $149, including a small pager-like window that displays messages. Basic analog phones, on the other hand, are frequently offered for little or nothing as incentives to sign...
...five different types of digital cell phones on a focus group of 980 pacemaker users. Noticeable interference in the pacing mechanism was detected 20 percent of the time, with potentially serious disruptions occurring in 6.6 percent of the cases. Despite their inferior communications performance, older phones, which employ an analog signal, caused relatively little interference with the pacemakers. Experts caution that further research is needed to determine how significant the cell phone risk...
...networks, especially, have got rich as a result. But broadcasters will have to spend the next decade sending out pricey digital versions of their programs alongside the original ones while the audience for digital TV slowly builds. After nine years, the broadcasters are to return their old analog spectrum for auction by the government...
...have to upgrade eventually to support digital traffic--although the additional bandwidth will cut into the number of channels they can offer--while cable services like HBO retool to produce digital shows. A few years hence, your local cable or satellite guy will start offering, alongside the usual 60 analog channels, a tier of scintillating HDTV programming, with brilliant color and sound...