Welcome to
Direct-Pickup.com and the direct pickup information page
If you
found this page you must be having reception problems with your Cable TV or
Digital cable TV reception. If you see analog interference it will appear as
noise or wavy lines, But for digital reception you see
macroblocking or no video and audio. Digital interference most likely cause the picture and sound to come
and go.
We are seeing a new revolution of wireless devices, some are called Television Band Devices or White
Space Devices they operate between 50 &700Mhz. There is also another class
of devices that operate, between 700 to 800 Mhz. At this point AT&T, VERIZON have not announced what they will call
this product or how they work. We do know that the 700 to 800 Mhz spectrum was bought for 19
Billion dollars or $19,000,000,000 and they got to do something!
You may be
looking for a shield to protect your TV from these transmitters Here is my e-comerce
web site where I sell Direct-Pickup shields and TV band filters.
Our
government has changed the licensing of the 700 to 800 MHz frequencies from
television, to
communication devices. In the past the TV transmitters were on mountain tops
many miles from your cable TV, now they will be only 4 watts and distances that
could be measured in inches.
The FCC own
report
has stated concern for interference susceptibility of three Digital Cable Ready
(DCR) TV’s.
Only those
devices Thru2way or Cable card certified must meet the requirements
as required by The FCC & Cablelabs,
Additionally AT&T, Verizon who have spent
19 Billion dollars for the 700 to 800 mhz of spectrum
could make 100 mhz of cable spectrum channels 109
through 125 un-useable or at least a problem to be dealt with.
AT&T’s
cellular service is around 820-850Mhz does your cable
provider use channels 129-134? WHY?
Diagnosis and fixing the problem.
You will
need to identify the problem channel, the first issue
is Digital TV channels have what is known as virtual channels. For example ch 2.1 could really be operating on ch
122. In the cable world, the least difficult method of channel Identification
would be use the diagnostic menu or the channel add/scan menu to determine the
channel you are currently watching.
Once you
know what channel you are watching, some method to improve shielding will have
to be accomplished. The first thing I would do is insist that the cable company
show that their cable box can work.
If their
cable box works without macroblocking the problem is
the shielding of your TV (See TV below)
If their
box does not work, insist that they replace the coaxial cable to the house;
time, movement,& stretching degrades the cable
shielding.
If that
does not solve the problem, see if you can get them replace the cable between
the house entry and the TV. If not, see
if you can pay or replace it your self. Make sure the cable
is the highest quality with 2 shields (metal foil & braded wire) RG-59 or
RG-8
If
you have a TV problem
See if
moving the set, or rotate the TV from the wall, If it
does.
It could be
that the TV has poor shielding when it was built, or that it has seen a damaged antenna
connector. As little as 5 pounds of force can degrade the tuners shielding
property’s by 10dB.
If you have
a wall mounted TV, or the cleaning person or Dog has pulled on the antenna
connector your effective shielding could be degraded.
My Direct
pickup shield available on my e-comerce web site can help, It
is most effective on channels 62-135.
If you use
an antenna to receive your television programming, You
could have reception problems from these sources. An explanation can be seen at
http://www.white-space-filter.com
Hope this
helps
Bill
Bennett
For more info
on the subject go to these sites
http://www.showmywhitespace.com/?gclid=CJjPmbPv85kCFYZM5Qodo0qbSA
http://en.wikipedia.org/wiki/White_space_(telecommunications)
Evaluation
of Prototype TV-Band White Space Devices – Phase II
Relative calibration of un desired power to
meet CEA 23a
Ch EIRP
dBm at 2 meters from device
Ch2 +10
Ch6 +6
Ch7 +5
Ch13 +5
Ch65 +7
Ch125 +10