Excellent suggestion Bob....very much appreciated Bob Axtell wrote: You can perform some up-front work that will save yourself a LOT of grief. For example, suppose you need to get FCC part 15 certification for a PIC-based product. Purchase a simple broadband "sniffer". I bought mine from a kit store; it detects RF radiation from 2Mhz to 1000Mhz and makes an alarm when any is detected. I KNOW I paid less than $100USD. (It was sold to detect "bugs" by private investigators). Its the best $100 I ever spent... (well, there WAS that cute Irish girl in Boston I once had dinner with... but that's another story.). Place the product, RUNNING, on a non-metallic tabletop and walk around it with the sniffer. If you can't detect any signal in less than 10' (3.3m), you will NOT have an issue when you need to get a certificate. On the other hand, if you DO, then you need to find out WHY and fix it. The last time I had a problem, it was caused by a serial chip, NOT the PIC. Incidentally, PICs are remarkably quiet. Even at 20M, the internal structure does NOT radiate much RF. But watch for Intel, Motorola and others; you will get a big surprise. In 15 years, I never had a PIC product that failed Part 15. Of course, this is good only for unintentional radiators only. --Bob Axtell > It's an interesting area. At the end of the day, any "final product" > that is an intentional radiator must have its own separate FCC ID. > > Some companies will ease this, and IIRC it works as follows: > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --------------------------------- Need a vacation? Get great deals to amazing places on Yahoo! Travel. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist