Hot New Product
broadcastengineering.com
Adjacent-channel Technology
Acrodyne Adjacent-Channel Technology
(ACT): ACT allows you to pass adjacent
digital and analog signals through a single
high-power amplifier; Diacrode and
advanced tetrodes can be tuned to 12MHz,
the bandwidth required for two channels;
Acrodyne's booth will feature an ongoing over-the-air demonstration of an
ACT transmission broadcast in analog and digital from KBLR-TV in Las
Vegas; 215-542-7000; fax 215-540-5837; acrodyne@pond.com;
www.acrodyne.com
Adjacent-channel DTV/NTSC transmitters using Diacrodes
broadcastengineering.com
From the 10KSB:
Adjacent Channel Technology (ACT(TM))
The assignment to broadcast by the FCC, in its Fifth and Sixth Report and Order of April 1997, of DTV channels adjacent to existing NTSC channels appeared to initially cause apprehension among broadcasters allotted such assignments. These broadcasters appeared to believe that in the case, at least, of DTV assignments above an NTSC channel (such assignments, the "N + 1 Case"), there existed no practical[ co-located] solution for sharing a single transmission line to a common antenna. Currently, it appears virtually impossible to manufacture a channel combiner in which there is no dead band between channels. Consequently, in the N+1 Case, broadcasters with such assignments appeared to initially believe that a second antenna and line, and perhaps a second tower, would be required.
As a solution to the problems associated with the FCC's adjacent assignments, Acrodyne's Engineering Department theorized and then confirmed that it would be possible to amplify both the NTSC and DTV signals through a single advanced tetrode or diacrode high power amplifier since the cavity tuning of such amplifiers could readily be made wide enough to carry both channels. To the company's knowledge, this is not presently possible with any other vacuum amplifying device such as the klystron, klystrode or IOT. Returning and adding a second separate DTV driver alongside the existing NTSC driver demonstrated conclusively that a diacrode 60kW NTSC 6kW Aural transmitter could readily be converted into a single 25kW NTSC 1.25kW Aural 2.5kW DTV transmitter. The Company believes that this technology works equally well for the N=1 Case and the [N-1 Case] Having tested and proved its technology, Acrodyne promptly applied to register to ACT(tm) trademark and to patent this new technology. As of the date of this Report on Form 10-KSB, both the trademark and patent applications are pending. Because the market is so large (nearly 400 adjacent channel assignments) for which the Company believes that Acrodyne alone has a technical solution, management has decided to refocus the majority of the Engineering Department's efforts toward bringing ACT(tm) to fruition before any other major product developments. The first delivery is expected to take place in May 1998.
|
