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RF Technology: Doug Lung
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Doug Lung is regional vice president of technology for a major station group. Contact him via e-mail at dlung@transmitter.com.
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Check Your DTV Signal With These Low-Cost Tools
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by Doug Lung, 8.03.2005
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This month, I'll provide a more detailed look at Rod Hewitt's TSReader program.
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Elevating Accuracy in Longley-Rice Coverage
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by Doug Lung, 7.06.2005
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Using the most accurate data possible when designing a new broadcast facility reduces the chances of real-world coverage problems.
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NAB Spotlights RF T&M Gear for DTV
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by Doug Lung, 6.08.2005
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As I've written before, I felt there was a great need for easy-to-use equipment for monitoring 8-VSB transmissions and ATSC streams. There was no shortage of DTV and 8-VSB test equipment at NAB this year. Prices were low enough. There is now no excuse for not knowing exactly what your station is transmitting on DTV
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Channel Election Choices Revealed
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by Doug Lung, 4.06.2005
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Let's take a more detailed look at the channel elections on a band-by-band basis.
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Going to Digital ENG: 30 Months and Counting
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by Doug Lung, 3.09.2005
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All 2-GHz broadcast equipment will be upgraded to digital technology and will be operating under a new band plan that keeps the same number of channels but reduces their width to 12 MHz.
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Do-it-Yourself Longley-Rice Studies
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by Doug Lung, 2.02.2005
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Many readers have asked how they can generate terrain-sensitive coverage maps like the ones I've used in my columns.
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IEEE II: Receive Antennas & Unlicensed Devices
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by Doug Lung, 1.05.2005
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This month, I continue my coverage of papers at the IEEE 2004 Broadcast Technology Symposium with a look at a paper by Kerry Cozad outlining receive antenna measurements, and William Meintel's evaluation of the FCC Notice of Proposed Rulemaking (NPRM) to allow unlicensed devices in vacant TV channels.
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DTV Transition Discussed At IEEE BTS 2004
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by Doug Lung, 12.08.2004
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Last month, I reviewed a petition by Hammett and Edison for reconsideration of the FCC's Second DTV Periodic Review Report and Order.
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Coverage Complicates Channel Elections
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by Doug Lung, 11.10.2004
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This month, I'll examine the options stations have in the channel election process.
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Transmitter Options for Digital Televsion
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by Doug Lung, 10.06.2004
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Now that the FCC has set deadlines for maximizing or replicating coverage, many stations will be looking at upgrading DTV transmitters or in some cases even replacing them.
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DTV Antenna Coverage Illustrated
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by Doug Lung, 9.08.2004
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This month, I'll outline some factors to consider when designing a DTV antenna.
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Choosing a Final DTV Channel
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by Doug Lung, 8.04.2004
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This month, I'll look at some of the things to consider when deciding on a DTV channel, and also relay some information I received from readers about low VHF DTV.
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RF@NAB: DTV Reception And Interference
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by Doug Lung, 7.07.2004
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At NAB2004, broadcast engineers were focusing on getting ready for the shutdown of analog TV.
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Low-Band VHF DTV Revisited
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by Doug Lung, 5.05.2004
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My March 10 column "DTV on Low-Band VHF Channels" generated a large amount of e-mail. Many of the comments described experiences receiving low-VHF analog and DTV stations (Channels 2-6) and a few others focused on the reasons low-VHF DTV reception is difficult. This month I'll share some of those comments with you and offer some ideas on why low-VHF DTV reception is such a challenge.
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NAB 2004: RF Expectations
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by Doug Lung, 4.07.2004
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This month I'll outline what I expect to see at NAB and highlight some of the more interesting papers on the NAB Broadcast Engineering Conference schedule.
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DTV On Low-and VHF Channels
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by Doug Lung, 3.10.2004
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Last month I heard from a reader asking my opinion on whether they should keep their UHF DTV channel or go back to their low-VHF analog channel for digital at the end of the DTV transition when analog TV is shut off.
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Broad Signals
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by Doug Lung, 2.04.2004
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Increasing frequency congestion has made it necessary for broadcasters to pay attention to the bandwidth and spurious signals from all their transmitters if they want to be good neighbors and avoid a citation from the FCC. Broad signals are not appreciated!
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RF Reflections and Predictions
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by Doug Lung, 1.07.2004
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This month I'll look back to address comments received on my November RF Technology column and look forward to TV broadcast RF issues I believe will be important in 2004.
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The 53rd Annual IEE Broadcast Symposium
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FCC DTV Planning Factor Modifications Suggested Repeal the FCC 7-channel Local Oscillator Taboo?
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by Doug Lung, 12.10.2003
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There are many fine technical conferences and broadcast shows in early Fall, but the one I always make it point to attend is the IEEE Broadcast Symposium, held in October in Washington D.C.
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DTV Interference to Analog TV Reception
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by Doug Lung, 11.12.2003
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This month I'll use two recent examples of DTV-to-analog interference to show how I analyzed the interference and determined some possible reasons how it could happen.
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