Home |
Search |
Today's Posts |
#14
![]() |
|||
|
|||
![]()
Very insightful, Mike! Especially the use of digital voice, and the
transmission of images on 144 MHz repeaters. That does make sense! I'm surprised that digital voice in particular is not being played with much today on HF - that may well be the future of radio right there, based on the direction the commercial broadcasters are headed. I would also expect to see much more emphasis on the convergence of the Internet with amateur radio - IRLP, e-mail servers, wireless messaging and similar concepts, for example. Handheld radios would probably have many cellular-like features - text messaging and built-in cameras, for example. I am positive that CW would be rediscovered and resurrected by those who wished to experiment with a historic signalling method used in the golden days of long distance communication. Special interest groups would spring up, as they would for RTTY, SITOR and other interesting though antiquated protocols. However, truly outmoded forms of communication common today would not exist at all, such as the repeater phone patch (in an era of cheap cellphones, who would even think up this one?) For emergency use, a similar interface to the public network would be provided, perhaps directly to a PSTN operator. No more personal phone calls, though!). Without the legacy of all of the current AM, CW, SSB, RTTY etc. equipment from years gone by, the requirement to fully support these modes on the new bands would not exist. What modes would be popular in equipment produced to meet the demands of the amateur service? In addition to standalone radios (at least for handheld service anyway), would we see black boxes designed to interface to PC and antenna, with software to run all manner of digital communication (high speed modem, digital voice, image transmission, low-res full motion video, etc.)? I would also anticipate that, in the interest of ensuring compliance with regulations, that each commercial radio may be designed to automatically transmit a unique identifier over the air, which would allow authorities to trace back faulty, out-of-band or malicious operation to a particular unit. This feature could be coupled with a built-in GPS receiver, to further aid in localizing the radio if and when necessary. This may well raise privacy concerns, but it could be mandated as part of the operating licence, just as mandatory transmission of the operators' call sign at intervals is today. And, as we are assuming a brand new service, it would be relatively easy to do - with no older units to retrofit. What would happen with homebuilt equipment, though? With respect to testing, I would anticipate that the regulatory and operating etiquette sections would continue to exist in virtually their present form. Along with the addition of more Digital questions to the theoretical portion of the tests, we may well see questions on interconnection to the Internet, firewalling and network security. There may be a new test section on emergency traffic handling, radio net and message relay operations - this being the most likely premise that we would be able to convince anyone to hand over all of this valuable radio spectrum to us in the first place! And given the priority of national security in our post-9/11 world, there may be a mandate for the amateur service to link very closely with the various emergency management agencies, upon governmental request? I would envision a requirement for perhaps two different licence levels, though - one for the basic equipment operator, limited to perhaps 100 or 200 watts, commercially built and type-approved transmitting equipment only, not permitted to act as control operator of repeaters. A higher level licence would be granted upon passing more stringent testing on RF safety and high power operation, repeater commissioning, internetworking and advanced electronic theory, which would remove these restrictions. Either licence level would have full access to all bands and modes, with no restrictions other than those listed above. The licence levels are not intended to be incentive based, but to ensure competence and safety (both personal and public) when installing and operating multi-user automated-access, internetworked or high RF power output equipment. Of course, there is the remote possibility that a Usenet group dedicated to the endless (and animated!) discussion of whether RTTY testing should be discontinued might crop up - hopefully very remote ![]() Please add or subtract from this list at will! 73, Leo On Sun, 04 Jan 2004 05:45:52 GMT, Mike Coslo wrote: snip Okay, here goes: With a new service coming into play, a major mode would be digital voice. Repeaters will be allowed, and these repeaters on the 144 mHz band will also be digital FM, as will HT's. Repeaters and the HT's would be allowed to send images as well as voice. Digital non-voice modes would include a PSK mode for typewritten material, and a high speed packet network would be allowed (remember that it takes some time to get these things going, and although allowed, would not happen for some time. Small portions of each band would be set aside for experimentation, and here is the place where unusual methods of communication could be used. This would include things like OOK Morse or other encoding schemes or SSB. Testing would be quite different that today. The most obvious difference is that there would be a lot more digital material covered in the tests. I would envision the basic digital building blocks tested. In addition, there would be the basic electrical theory and of course those questions about the various bands. (of course this would be a lot easier, since there would be less bands to cover) There would also be questions regarding proper operating etiquette. A newly formed group, the Radio Readiness Association for Preparedness (RRAP) is formed, and sets up the first contest/practice run in this year. Sorry - I couldn't resist! 8^) One license, one class. 1KW maximum. No Morse code test. - Mike KB3EIA - |
Thread Tools | Search this Thread |
Display Modes | |
|
|