04.21.2003 12:00 PM
KTech unveils new technologies for DTV transmitters and DTV translators
KTech Telecom introduced its distributed DTV transmission and regenerative DTV translator technologies at NAB2003.
Distributed transmission technology can be implemented in DTV transmitters and used to expand DTV coverage in the shadowed areas. It can also be used as an on-channel booster for DTV translators. The Regenerative DTV translator for multiple hops technology can be used for generating fresh DTV signals eliminating the carrier phase noise, making it possible to have as many multiple hops as a station wants to greatly increase the DTV translator coverage area.
Using these 8-VSB transmission technologies, a station can broadcast its product to a wider audience.
KTech employs GPS signals to synchronize all DTV transmitters and translators in a single channel. Because GPS signals are used, all DTV transmitters and translators appear as if it is coming from one source from the view of a DTV receiver. The additional synchronized DTV transmitters and translators will add to the system to provide additional coverage area and fill in a gap and shadowed areas. With this technology, on-channel boosters are allowed for DTV Translators.
KTech DTV translators for on-channel boosters are available in 1W, 5W, 10W, 50W and 100W versions.
KTech employs regenerative methods to recreate the original signal for its multiple hops. Each DTV translators are synchronized from its main DTV transmitter, and the signal carrier is regenerated in such a way that each DTV Translators start out with a fresh carrier source. The DTV translators do not add additional carrier phase noise each time it is hopped to a different channel. Because of this, unlimited multiple hops for DTV translators can be realized. KTech Regenerative DTV Translators for Multiple Hops are available in 1W, 5W, 10W, 50W and 100W versions.
Using 8-VSB terrestrial signals as its source, DTV translators extend coverage of DTV by remodulating the signal to a different channel while updating PSIP information (Virtual Channel Table’s (VCT) Station ID, Major and Minor Channel Numbers). KTech’s RF signal receiver will receive the original 8-VSB terrestrial signal. It will then remodulate to a new IF channel using the internal modulator. The upconverted RF output is then amplified and then goes through the DTV mask filter before the signal is sent to the antenna.
For more information visit www.ktechtelecom.com.
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