Tapping mobile DTV viewers
May 24, 2011 | (Broadcast Engineering Via Acquire Media NewsEdge) Is your station planning to tap into the 77 million household audience by providing mobile television programming? In a press release, Anne Schelle, executive director of the Open Mobile
Video Coalition (OMVC) said, “OMVC continues to track the progress made by broadcasters who are turning on mobile DTV. The numbers of broadcasters on-the-air with mobile continues to rise, with 76 stations now on the air in 32 markets ... Between those stations already on-air and those who are coming soon, we project that mobile DTV will reach more than 77 million households or more than two-thirds of all
viewers in America – in the next twelve months.”
The coalition released the report at the January CES conclave in Las Vegas. The report reviewed the results of a 2010 Washington, D.C., area test of digital mobile television delivered by OTA broadcasters. The test involved approximately 345
viewers in the D.C. area. Almost 200 participants watched
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Chirhart shares results of New Orleans Jazz Fest multiband pilot
May 19, 2011 | The Department of Homeland Securitys Science and Technology Directorate launched a 30-day pilot in New Orleans in partnership with law-enforcement and emergency-management agencies. The pilot tested the latest multiband radio technology, which lets disparate agencies communicate across jurisdictions regardless of radio band. Specifically, Harriss Unity XG-100P multiband radios interoperability was tested by state, local and regional fire and police departments during the citys Jazz and Heritage Festival, which ended May 8. The pilot has been extended so that Louisiana agencies can test this system further in preparation for hurricane season, said Thomas Chirhart, program manager of the multiband radio program.
We wanted to test, based upon the lessons learned from Hurricane Katrina, primarily, the need for an alkaline or disposal battery pack. I have a picture of a New Orleans police car underwater and the only thing showing is the emergency lights. And when you have a complete system failure with your power-grid and assets are underwater, submerged with patrol cars and fire apparatus, theres no chance to seek a solution to recharge batteries. So weve identified that an alkaline or disposable radio battery pack was essential.
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Mobile, Auto Cellular, CB, Satellite & FM Antennas
Feb 08, 2012 | 15db AM FM Auto Antenna Signal Amplifier 15db AM FM Auto Antenna Signal Amplifier Retail: $34.95 Sale Price: (You save: 51%) 24" Center-Load Magnetic CB Antenna Kit
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In-Car Mobile Antenna with BNC - Scanner Master - Police Scanners ...
Feb 08, 2012 | This is the wire replacement antenna for mobile scanners. It's a reasonable option for those who don't want to mount an outside antenna on their car.
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Mobile antenna - Antennas: Mobile - The DXZone: ham-radio ...
Feb 08, 2012 | Most Popular. Antennas for HF mobile operation - The following description should give you guidance on how to build a mobile antenna for HF bands yourself, using a very ...
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Mobile Antennas - Scanner Master - Police Scanners by Uniden ...
Feb 08, 2012 | Best mobile antenna for base mobile fire and police radio scanner. Scanner Master has the latest models at great prices, same day shipping, nation's largest scanner dealer.
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Popular Search Terms: Car TV Antennas
Feb 08, 2012 | With a car tv antenna you can watch that special game while you are in the car. Quality mobile video carries the largest selection of car tv antennas.
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Nov 27, 2010 | HTC TouchFLO?; 4-Way Navigation Wheel with Enter button; HTC Footprints? button; Internal GPS antenna; Bluetooth® 2 A2DP, Wi-Fi; 3.2 MP camera,
Nov 23, 2010 | For months I kept with me the first Verizon VCast 3G phones back when they had an antenna. I did the same with the first iterations of Sprint TV on 3G
Nov 25, 2010 | The elderly Tom Skidmore of Osage City rides his motorized scooter, an American flag flapping from an antenna. Thornton Wells of Osage City walks through,
Nov 19, 2010 | Iowa - Antenna company Winegard plans first-quarter availability of an ATSC-Mobile/Handheld video system for the car at a suggested $799,
Nov 25, 2010 | Atlanta now hosts all its car rental companies at one central off-airport complex equipped with common-use self-service kiosks, CCTV, a mobile phone
Can existing car phone antenna wire (thru the glass type) be used to connect a mobile CB/Scanner?
Jan 26, 2007 by c0ff3ytime
Wireless antenna similar to cable TV.
A car phone antenna is tuned for car phone frequencies (800/900/1800/1900MHz depending where you are and what bands it covers). You could use a scanner with it on higher UHF frequencies quite well, however performance would suffer on VHF. Still, it could be a step better than using a tuned rubber duck inside the car. CB is even further off frequency, being around 27MHz. The reception would be shoddy and if you transmitted into it your SWR would be very high and you could ruin your radio. If you replaced the whip with something tunable at the frequencies of interest you could probably use the rest of it.The need for a car I believe is a phone or TNC connector Mini UHF, which differ from the scanner (usually BNC) or CB (also BNC for SO-239/PL-259, mobile phone) to you. 'd have to use adapters to plug in the cable.
- A car phone antenna is tuned for car phone frequencies (800/900/1800/1900MHz depending where you are and what bands it covers). You could use a scanner with it on higher UHF frequencies quite well, however performance would suffer on VHF. Still, it could be a step better than using a tuned rubber duck inside the car. CB is even further off frequency, being around 27MHz. The reception would be shoddy and if you transmitted into it your SWR would be very high and you could ruin your radio. If you replaced the whip with something tunable at the frequencies of interest you could probably use the rest of it.The need for a car I believe is a phone or TNC connector Mini UHF, which differ from the scanner (usually BNC) or CB (also BNC for SO-239/PL-259, mobile phone) to you. 'd have to use adapters to plug in the cable.
Can I use a mobile style CB antenna that is meant for a car, as a base-station CB antenna on my home?
Sep 22, 2008 by drwebster93
I have a mobile style antenna that is meant for a car and uses a magnet to attach to the roof of a car. I want to know if I could use it as an antenna for my base station CB radio. My plan was to solder and/or screw four steel backing sheets together and then mount them on my roof, to make a flat surface and to use as a ground plane. Then I could take advantage of the magnetic base of the antenna and just stick it in the middle of the four baking sheets. Will this work?
Again, as metioned above, the results may not be optimal.
But, given a little consideration, I think it is do-able as follows:
- You can use a square iron or steel base-plate that the antenna magnet will stick to.
- Drill a hole in each of 4 corners of the plate for attaching radial copper wires. The copper wires needs a firm clean connection to the base-plate.
- Each copper wire radial arm needs to be about 18 feet long. 18 ft is ~ 1/4 wavelength at 27 Mhz CB band. With the 4 radials extended full length from each of the 4 corners of the base plate, this will create a ground plane for the antenna system.
The weakest link in this scenario may be the vertical antenna component itself. As mentioned, antenna elements generally need to be around 1/4 wavelenght for best effeciency. The vertical elements of Mobile Antennnas are generally far less than 1/4 wave (~18 ft.) and thus will never be as effecient as a full 1/4 wave vertical element.
Go ahead and try it. Experimenting with antennas is half the fun of radio communications. It may not be optimal, but it may be a cheap "functional" option, if implemented with care. You can decide afterwards if investing in a commercially manufactured, full size, base antenna is a better solution.
- it will work, but not very well! you will not be happy.
The bigger the antenna, the better the antenna. Mobile antennas are marginal at best.
The metal base needs to be 18 feet in diameter for proper match.