Bob George wrote: > How are you going to send data with this arrangement?
I dunno yet, kinda expect someone will tell me how he's already done it. That chances that I mite stumble across something really useful that has not already been done seems kinda remote. I dunno who National Semiconductor expected to sell their boards to. I didnt see where the data that the board collected, actually was ported to the ISA bus. But one of the charts showed that one of the lines multiplexed two 12bit data streams, so the sound card comes to mind. Stereo. And it seemed that the com port (which we see dial up modems do 4.3kb/second) could be used to adjust the transmit/receive frequencies by .05mhz in a spread spectrum fashion that'd make detection, much less interference, really unlikely in a wireless application. Since it only takes few bytes to change the setting, it could change the tuned signals a thousand times a second. Scanners would never see it. They seem to be proud of their AGC capabilties, and if this is what they mean, they should be. IIRC, a chart showed 3 more lines besides the multiplexed one, and could use the others to look for noise free frequencies from 300 or whatever mhz on down to DC. The board seemed to be the size of a credit card, with only a few chips; prolly sell for less than 10$. Aint nearly as complex as a cell phone. Seems to make sense that if you have a fixed desktop, you could run a coax to an outside antenna, and have at least the range of a cell phone for about the same money.
