mckeeman@wivax.UUCP (04/10/84)
The BSR system turns on and off 110v switches which reside in smallish modules that plug into the wall (and other places). The signals are pulsed 120KHz on top of the 60 cycle 110v house wiring. Sears and Radio Shack sell the BSR system. DAK industries does too, at cut rate and questionable quality. Radio Shack USED TO sell a device that connected a model 1 or 4 to the line. My local store was unable to get one and claims it has been discontinued. Heath does sell a kit GD-1530 for about $125 which takes in re232 signals and makes the 120KHz signals. There are a number of articles on how the system works. Try Ciarcia in Radio-electronics Sept. 1980 pg 47 for starters.
jrh@bunker.UUCP (Jeff Hagen) (04/11/84)
Another source of information
john@hp-pcd.UUCP (04/12/84)
If you want to sell computer equipment into the home enviorment then you must obtain a FCC Class B rating. One of the requirements for this is a conducted emissions test from 10 khz to 30 mhz. This measures how much energy your product places on the AC lines. Does anyone know how the BSR system passes this? I would think that they would either have to guarantee the level that is one the line or else be licensed for that frequency. John Eaton !hplabs!hp-pcd!john