RF Technology
Doug Lung is regional vice president of technology for a major station group. Contact him via e-mail at
dlung@transmitter.com.
Designing an On-channel DTS and Repeater
by Doug Lung, 07.27.2010
I'll show you how to determine single-frequency network interference using the digital on-channel repeater network. More...
Measuring Mobile DTV Coverage
by Doug Lung, 07.02.2010
Techniques used for calculating and measuring coverage to outdoor antennas don't account for the wide variety of environments where mobile and handheld devices are used. More...
ATSC Digital On-channel Repeaters at NAB Show
by Doug Lung, 06.02.2010
This year I saw three companies showing DOCR products on the show floor. More...
What to Look for in A153 Mobile DTV Tables
by Doug Lung, 03.19.2010
When setting up a new MDTV facility, codec settings and the tables are likely to cause the most problems. More...
Lessons Learned from the CES Mobile DTV Demo
by Doug Lung, 01.27.2010
While the technology is there, it was clear a lot of work will be needed to develop a system that is compatible with different video sources and display devices. More...
RF: Its Past and Future
by Doug Lung, 01.05.2010
TV Tech RF guru Doug Lung marks 200th column More...
Digital Coverage Is Hot at IEEE Symposium
by Doug Lung, 11.23.2009
The signal level required for reliable DTV reception has been a popular topic for IEEE Broadcast Symposium papers over the last 20 years. More...
A Digital On-Channel DTV Repeater (DOCR) Service
by Doug Lung, 11.02.2009
To fill in the coverage holes created in the move from analog to digital TV and to provide seamless mobile DTV coverage, many stations will need repeaters. More...
Analyzing DTS Coverage With Longley-Rice, SPLAT
by Doug Lung, 09.02.2009
Analyzing coverage and interference in a distributed transmission system is not much more difficult More...
DTV Coverage Problems
by Doug Lung, 08.11.2009
This month I'll focus on relatively low-power synchronized transmitters and how they can improve reception. More...
RF at the 2009 NAB Show - Part 1
by Doug Lung, 07.02.2009
The success of mobile DTV will depend on reliable coverage. More...
Improvements in Propagation Models
by Doug Lung, 05.01.2009
This month, I'll look at an ITU propagation model that could replace Longley-Rice and some major updates to the popular open-source SPLAT! propagation software. More...
Solving VHF DTV Reception Problems
by Doug Lung, 04.23.2009
Many TV stations with high-band VHF analog channels are moving their DTV transmissions to those channels after analog is shut down on June 12. More...
Fixing DTV Coverage Problems
by Doug Lung, 02.10.2009
Low-VHF analog TV stations with UHF DTV channels experienced the biggest loss in DTV coverage. Even with 1,000 kW of effective radiated power, a UHF DTV service area contour usually will not match the low-VHF analog Grade B More...