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#21
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On Fri, 03 Jun 2005 10:01:39 -0400, Buck wrote:
On Thu, 02 Jun 2005 12:33:44 GMT, Bob Miller wrote: On Thu, 02 Jun 2005 02:11:44 -0400, Buck wrote: Each radio has it's own finger-print that the FCC can read. Many times, they can tell the make and model by the signature before ever seeing the rig. I would think that the most popular HF mobile rig ever is recognized by the FCC. Rig fingerprint? How does that work? bob k5qwg I don't know, the FCC mentions them in letters to the owners of the rigs they are requiring inspection on. It's called "signature analysis". Every emitter, whether the human voice, a transmiiter or a piece of vibrating machinery puts out its vibrations in a unique pattern that can be determined by careful analysis of the signal. There are mathmatical analysis tools that can break down the patterns into frequency bands and time signatures that all together, show that your Icom IC-706 MarkIIG is uniquely different from my friend's. The math isn't particularly difficult, there are specialty chip sets that will do it. The trick is doing it fast and accurately enough. The "waterfall" display in WINPSK is doing the math, but only enough to show the signals and decode the PSK protocol. If it were accurate enough it would show the differences between all the transmitters. Russ - kf4wxd |
#22
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On Wed, 01 Jun 2005 00:47:19 GMT, Bob Miller
wrote: By the way, curious, but what does Honda charge for a factory installed cb setup? I don't really remember. We had the CB installed when we got the bike, back in 1991. It was a few hundred bucks at least, as I recall. |
#23
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Thanks to all for your helpful information on this topic. And thanks also for the notes on proximity of the operator to the antenna. This is also of a concern to me, but it's a different question so I didn't mention it in my original post. The fact is, I'd be doing about 98 percent listening and 2 percent talking anyway, and so I'm currently somewhat more concerned about damage to equipment than damage to my brain which is already fairly damaged anyway according to my XYL... ;-) As for opening up the 706 to transmit out-of-band, this rig has that mod (for MARS). If I didn't already have the integrated CB in the Gold Wing I might consider using the 706 on CB and take my chances on getting caught, but since the legal radio is already there, may as well use it. |
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