home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.electronics
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!wupost!csus.edu!netcom.com!hcb
- From: hcb@netcom.com (H. C. Bowman)
- Subject: Re: Do I need FCC approval for small devices?
- Message-ID: <1993Jan8.213012.3302@netcom.com>
- Summary: It depends...
- Organization: Box of Rain Productions
- References: <1993Jan6.063517.14107@sequent.com> <20692@ksr.com>
- Date: Fri, 8 Jan 1993 21:30:12 GMT
- Lines: 36
-
- Hullo--
-
- Having taken my first product through the rigors of FCC testing recently,
- I am delighted to inform you that the answer is an unqualified "maybe."
-
- The clock-speed exception is probably safely ignored since the FCC
- defines a "digital device" as something that uses _digital techniques_
- and employs timing signals or pulses whose frequency exceeds 9 KHz. In
- other words, any useful embedded-controller device will interest the FCC.
-
- The useful exceptions center upon where and how the circuit is going
- to be used. Anything designed to be used _exclusively_ on a car,
- train, or other moving vehicle is exempt from the emissions testing
- requirements. Anything used _exclusively_ in an appliance (smart
- toasters, programmable blenders...) is also exempt. Industrial
- controls, low-low-low power gismos ( < 6 nW), and non-commercial
- medical equipment are exempt. Finally, if your product is meant to be
- battery-powered and has no sources higher than 1.705 MHz, then you're
- free and clear.
-
- If you want to consult the applicable canon, call the G.P.O. and order
- 47CFR parts 0-19. You'll be interested in section 15 in this case.
-
- If you aren't lucky enough to qualify for the above exemptions, then
- I can refer you to a good testing lab. One thing I strongly suggest,
- however, is to avoid designing your own switching power supply: the
- "conducted emissions" standards of the FCC (how much switching noise
- can appear on the AC mains) aren't kind to the uninitiated.
-
- Good luck!
- --Cliff
-
- --
- | Cliff Bowman |(501) 968-2232 Voice | As of 1 December, 1992, I was |
- | Electronics Wonk |(501) 964-6118 Pager | approximately $1,017,077 shy |
- | Innovation Ind. |(501) 968-7986 Fax | of being a millionare. |
-