| DIGITAL TELEVISION
PRIMER Written by MIKE KOHL at GLOBAL COMMUNICATIONS |
| The United States Congress
mandated that the Federal Communications Commission create a Digital
broadcasting system for all U.S. TV stations. Over 1600 full
powered broadcast television stations converted exclusively to digital
by June 12, 2009. Thousands of remaining Low Power TV and
Translator stations are presently letting their local marketplace as
well as financial abilities decide when to convert to digital.
Nearly a year after all full-power stations converted to digital, at
least 2000 LPTV and translator facilities have done the same. It
has not been easy for many of these stations, often operating as
nonprofit entities without any funding to convert their 30 to 50 year
old shoestring operations into the digital format required in the 21st
century. Fortunately, the Obama administration did open a path for
many of these groups to obtain federal funding to manage the
transition. There is presently no deadline for remaining stations
to convert to digital, and the reality is that a sizeable number may
simply go off the air rather than take the steps necessary to go
digital.
There are technical as well as financial reasons for problems in many smaller translator operations, which are often hundreds of miles away from their originating station. A prime example is in the state of Nevada, which has the rare distinction of having over 10% of the remaining full power TV stations transmitting in digital via channel 2 to 6 low band frequencies. The FCC was very conservative in the initial granting of power levels to VHF channels, especially those in Low Band, with the result that many stations have a small fraction of their geographical coverage in digital format, as opposed to that once enjoyed in analog. Many stations originally on low band 2 to 6, especially those on the West Coast and in mountain regions, were able to get permanent digital facilities on High Band VHF channels 7 to 13. These are very advantageous in mountainous areas, because high band VHF penetrates hills and valleys much better than UHF, and requires smaller sized antennas than stations transmitting on low band channels 2 to 6. Still, there are problems in some areas due to varying levels of digital signals that change with weather and also have seasonal variations. The result is that distantly located translator stations that once had pretty good luck with analog pickup find that their new digital signal is not able to provide reliable coverage under everyday conditions. Solutions could include being fed by satellite, microwave systems, or simply giving up and going off the air...telling those without network reception to consider DISH Network or DirecTV for a solution. Desperate measures in many cases for those in the most rural locations. Those that have gotten beyond the problems of getting a signal for their transmitter are finding a very interesting market, compared to the good old days of analog reception. A TV transmitting facility for digital can often have not only a high definition version of their original channel, plus as many as 3 or 4 additional standard definition channels in standard definition mode. Those choosing to not transmit in HD at all can often squeeze 6 standard definition signals into the same space. In the vast majority of situations, there is new channel space suddenly available for new services. PBS was the leader in the race to digital, with many of the stations sending not only a high definition feed of their main signal, but adding a standard definition signal for statewide networks, and adding brand new PBS services such as PBS World (news and public affairs), PBS Kids (children's programming), PBS Create (do it yourself shows) and the Spanish language V-Me service. Many commercial stations added news and weather channels. Other enterprising groups found a need for certain niche market programming that could be sold to broadcasters across the country. Enter channels such as Retro TV Network, Tuff TV, and others with classic TV shows from the past, and This TV with ad-supported classic movies. The Cool TV has recently expanded in a major way for music videos. Some stations have even added radio stations to the mix, or at least taking a local news-talk channel and putting it on the audio track with a weather channel billboard. Shopping channels and religious channels have found new outlets for their programming and the cost is much less to rent space on an existing facility, than to go through the process of building a full power station on their own. We have not begun to mention the huge explosion in foreign language programming suddenly becoming available to a huge part of the country, especially Spanish-language channels. We are now beyond the confusion of 2009,
after the initial conversion of major facilities to digital. There
was a federal program to subsidize the purchase of low cost basic
digital converter boxes to provide these new digital channels on
existing analog televisions. All new televisions are capable of
the new digital format. It has been so long that many people have
been relying upon cable TV for their signals, that an entire new
industry to provide compatible TV antennas and accessories has been
created. Digital reception requirements are not the same as
analog, and new installation techniques and realities must be
considered. No more ghosting or snowy pictures.
Digital is either perfect, or in the case of insufficient signal,
nothing. Connect a proper antenna system to your digital converter
or digital television, and you will likely be very impressed by the
improvements. Metro areas can often use indoor rabbit-ear type
antennas, especially on stronger UHF stations. Those channels
transmitting on VHF (channels 2-13) may find that an indoor antenna is
not enough for reliable reception. Outdoor antennas are then
recommended. Placement of an outdoor antenna in an attic may
provide enough added signal versus the previous indoor rabbit ear
antenna to make things work, but antennas inside buildings are often
shielded by walls thick enough or dense enough to severely limit TV
reception. You may have to consider mounting the antenna outdoors,
especially if trying for a signal outside of your local area. For more information, contact us: E-Mail globalcm@mhtc.net Telephone (9am to 6pm Monday-Friday, Central time) 608-546-2523 |