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Antenna R&D
Antenna Gain - Is it the ultimate measure of a better antenna?
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<p>[QUOTE="FOX TV, post: 32667, member: 4493"]<strong>More antenna comments</strong></p><p></p><p></p><p></p><p></p><p>We do like the clear stream antenna, but really have not had a chance to compare it to any other brands of the "New Generation" antennas designed for UHF DTV. We did do a test a few weeks back using a C2 at 75 miles away from our 4000 feet transmitter on Rf channel 17 . We got very acceptable results using only 20 feet of mast pole. TV FOOL showed a good LOS which made it fairly easy to pick up. </p><p></p><p>We were trying to find the cliff so we could drive off of it, but at 75 miles out we still had around -65 to -70 dBm with a LOS using 35 feet of quad shield RG6 and a C2 at 20 feet. We were 75 miles out which is about 5 to 10 miles outside our 41 dBu contour, and we never did drive off of the cliff. </p><p></p><p>It looked as if it would have taken another 15 to 20 miles or more before we lost the signal to the noise, but it was a Friday afternoon, and we were already on volunteer overtime, so we turned around without finding the cliff on that day.</p><p></p><p>We have driven a lot of miles in the last 6 weeks or so, and we actually use 2 different antennas, with one being a Z Technology calibrated dipole and calibrated cable at 30 feet for channel power tests, and either the C2 or C4 depending on what levels we see using the calibrated dipole for the actual simulated viewer reception test. </p><p></p><p>Everywhere we go, we do both tests, and have found the c series antennas to perform well, but it would be nice to have some other brands and designs to compare it to. I met the owner of Clear Stream on their promotional tour, and he told me that they had a large grant from the NAB, and they were somehow financially backing the development of the C series antennas, and financed the antenna give away tour.[/QUOTE]</p><p></p>
[QUOTE="FOX TV, post: 32667, member: 4493"][b]More antenna comments[/b] We do like the clear stream antenna, but really have not had a chance to compare it to any other brands of the "New Generation" antennas designed for UHF DTV. We did do a test a few weeks back using a C2 at 75 miles away from our 4000 feet transmitter on Rf channel 17 . We got very acceptable results using only 20 feet of mast pole. TV FOOL showed a good LOS which made it fairly easy to pick up. We were trying to find the cliff so we could drive off of it, but at 75 miles out we still had around -65 to -70 dBm with a LOS using 35 feet of quad shield RG6 and a C2 at 20 feet. We were 75 miles out which is about 5 to 10 miles outside our 41 dBu contour, and we never did drive off of the cliff. It looked as if it would have taken another 15 to 20 miles or more before we lost the signal to the noise, but it was a Friday afternoon, and we were already on volunteer overtime, so we turned around without finding the cliff on that day. We have driven a lot of miles in the last 6 weeks or so, and we actually use 2 different antennas, with one being a Z Technology calibrated dipole and calibrated cable at 30 feet for channel power tests, and either the C2 or C4 depending on what levels we see using the calibrated dipole for the actual simulated viewer reception test. Everywhere we go, we do both tests, and have found the c series antennas to perform well, but it would be nice to have some other brands and designs to compare it to. I met the owner of Clear Stream on their promotional tour, and he told me that they had a large grant from the NAB, and they were somehow financially backing the development of the C series antennas, and financed the antenna give away tour.[/QUOTE]
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