DERSEQUIM wrote:
I have heard that Digital TV Stations are not as readily available to us as the old TV Signals were? Is that true? I got on a U S Gov Website today and it showed only one station available at Birch Bay WA and None at Ocean Shores WA. We used to get the Seattle/Vancouver Locals at Birch Bay from Bellingham and Vancouver??
not sure what you mean by "readily available"...please explain further. every TV station in the US (and a year or so later in Canada) switched from analog to digital transmission. AFAIK none of those stations went off the air so in terms of sheer numbers there ought to be just as many stations on the air now as there were prior to the switch.
everything else being equal there is a primary difference in the propagation of analog vs. digital. an analog signal will gradually fade away the farther the receiver is from the transmitter source. the programming is still usable through this fading or 'snow' until at some point it fades out altogether.
a digital signal is either there or it's not. as a digital signal reaches it limit it will first exhibit what a lot call "pixelization" or "pixilated". the picture will freeze or become a jumbled mess of multi-colored squares or the picture will simply disappear. this pixelization can also occur when something temporarily comes between the transmitter and receiver. airplanes, trains, large flocks of birds, tree foliage, etc. all can cause pixelization. couple that with the relatively poor receivers built into today's TV sets and the fact that most campgrounds and RV parks are located in the country can really make it hard for RVers to receive a useable signal.
many of the TV stations that were assigned to VHF frequencies (channel 2-13) in the analog days switched to UHF frequencies when the analog-to-digital switch took place even though they kept their VHF channel identity.
you can do a couple of things to improve your reception of digital over-the-air (OTA) TV.
first, if you have a winegard crank-up TV antenna consider changing out the head to the newer
Sensar IV head. it reportedly increases UHF reception by 100% and since many TV stations are now operating in the UHF band that would be a good thing. alternatively consider adding the
Winegard Wingman to your existing winegard antenna. the Wingman consists of a plastic yagi antenna that snaps onto the existing Winegard head which helps collect more UHF signal and focuses that signal to the UHF reeiver built into the head of the Winegard antenna.
next, if the coax between your RV's antenna and the roof connector is more than 5-6 years old consider replacing it. coaxial cable will break down over time resulting in deteriorating performance. also, the connectors at each end are notorious for allowing moisture to seep into the cable causing further problems.
lastly, if your RV space is seasonal consider mounting a residential style TV antenna onto a piece of mast and getting that antenna as high in the air as possible. the higher the antenna the better.
good luck.
Rich
Ham Radio, Sport Pilot, Retired 9-1-1 Call Center Administrator
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