THE BIRO TECHNICAL BULLETINS
THE MORNING AFTER TUESDAY, FEBRUARY 17
It was said the actor Michael Caine sent his kids back to
The anecdote may not be true, but decades later a new, similar anecdote could be circulated about the chaotic events surrounding the 2009 US DTV Transition.
The original transition date of Tuesday, February 17, 2009, was pushed back by Congress to June 12. 420 of the 1780 full power analog TV stations decided to change in advance of the June deadline, making the “seamless US DTV Transition” not exactly seamless. A simple technical process has been politically botched.
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Despite all the planning, calculations and projections CATV systems could find out only the morning after:
Should this “real world” testing deliver disappointing results, it is the head-end engineer’s responsibility to analyze the test results and take corrective action. “Blind experimentation”, cut and paste methods may not be the most desirable approach.
What is desirable?
Having up-to date information of major DTV reception parameters at your fingertips, such as:
The partial DTV Transition of 420 stations did not reduce confusion. When moving to new a DTV channel allocation, particularly from a UHF to VHF channel, the elimination of the 700 to 800 MHz frequency range requires drastic changes in planning new antenna-array configurations and tower upgrades.
When a new VHF DTV station operates with limited (10 kW ) effective radiated power, or the DTV station is reassigned from Channel 68 to Channel 15, coupled with the relocation of the transmit antenna of the new DTV station by 22 miles, the request for a reliable and informative DTV Reception Study seems mandatory.
A few examples of POST-TRANSITION DTV RECEPTION SOLUTIONS are presented below.
Channel 28, WWLP,
The new co-channel offender, Channel 11,
Nor were DTV reception conditions worked out more favorably for Channel
Protection against two co-channel offenders can be a very expensive proposition!
Finally, consider the unique case of Channel 63, WMBC,
RELOCATION DISTANCE CALCULATION
CATV systems, receiving and carrying the WMBC, Newton DTV station, were forced to re-orient their existing UHF antenna-array toward the new location, not a highly desirable task in the middle of winter.
Quoting M.J. COPPA, the acting FCC Chairman “this staggered DTV transition is confusing and disruptive”. Who would disagree with Mr. Coppa?
Help is on its way. The Biro Computer Runs and Signal Sheets can provide a tremendous assistance to the head-end engineer who is under great pressure to produce fast and positive results.
On the other hand, if you are not overly anxious to get the best DTV Reception Study on the market there are other solutions. However these tend to omit important information such as the name of the cities and their distances, or add useless features like Grade “B” contour maps of all expiring analog stations but not the new digitial stations.
Accept nothing less than the best DTV signal reception study out there. Contact Biro Engineering immediately.
For emergency engineering services:
Call: (609) 883-9866
Web site: www.biroengineering.com
PRINCETON, N.J. 08543