The rules also make it clear that SS (or any other coding system) cannot be used to hid the meaning. They used to demand disclosure of the encoding system for compliance, but now, seem happy if the decode software (but not the source code) is freely available to those who want to listen.
Lester B Veenstra MØYCM K1YCM <mailto:les...@veenstras.com> les...@veenstras.com <mailto:m0...@veenstras.com> m0...@veenstras.com <mailto:k1...@veenstras.com> k1...@veenstras.com US Postal Address: PSC 45 Box 781 APO AE 09468 USA UK Postal Address: Dawn Cottage Norwood, Harrogate HG3 1SD, UK Telephones: Office: +44-(0)1423-846-385 Home: +44-(0)1943-880-963 Guam Cell: +1-671-788-5654 UK Cell: +44-(0)7716-298-224 US Cell: +1-240-425-7335 Jamaica: +1-876-352-7504 This e-mail and any documents attached hereto contain confidential or privileged information. The information is intended to be for use only by the individual or entity to whom they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this e-mail or any documents attached hereto is prohibited. From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of bg...@comcast.net Sent: Tuesday, July 13, 2010 8:45 PM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] SS and the FCC definitions sorry, the fine print is giving me fits. It's obviously 97.3 (c)(9). I'm thinking another reason for the restrictions - SS is also a very good means of encryption. The previous rules on SS required use of a particular type of SS and the key number was specified in the rule.. Probably in a pre 1999 ARRL rule book , if anyone really needed to look. There might exist a method of finding old versions of the CFR online, but I have not looked. ----- Original Message ----- From: "Lester Veenstra" <les...@veenstras.com> To: digitalradio@yahoogroups.com Sent: Tuesday, July 13, 2010 12:26:57 PM GMT -06:00 US/Canada Central Subject: [digitalradio] SS and the FCC definitions § 97.3 Definitions. (b) The definitions of technical symbols used in this part are: (9) UHF (ultra-high frequency). The frequency range 300–3000 MHz. ---------------------------------------------- § 97.3 Definitions. (c) The following terms are used in this part to indicate emission types. Refer to § 2.201 of the FCC Rules, Emission, modulation and transmission characteristics, for information on emission type designators. (8) SS. Spread spectrum emissions using bandwidth-expansion modulation emissions having designators with A, C, D, F, G, H, J or R as the first symbol; X as the second symbol; X as the third symbol. § 2.201 Emission, modulation, and transmission characteristics. The following system of designating emission, modulation, and transmission characteristics shall be employed. (a) Emissions are designated according to their classification and their necessary bandwidth. (b) A minimum of three symbols are used to describe the basic characteristics of radio waves. Emissions are classified and symbolized according to the following characteristics: (1) First symbol—type of modulation of the main character; (2) Second symbol—nature of signal( s) modulating the main carrier; (3) Third symbol—type of information to be transmitted. (c) First Symbol—types of modulation of the main carrier: (2) Emission in which the main carrier is amplitude-modulated (including cases where sub-carriers are angle-modulated):. —Double-sideband ....................... A —Single-sideband, full carrier ..... H —Single-sideband, reduced or variable level carrier ................ R —Single-sideband, suppressed carrier ...................................... J —Vestigial sideband .................... C (3) Emission in which the main carrier is angle-modulated:. —Frequency modulation ............. F —Phase modulation ..................... G NOTE: Whenever frequency modulation ‘‘F’’ is indicated, Phase modulation ‘‘G’’ is also acceptable. (4) Emission in which the main carrier is amplitude and anglemodulated either simultaneously or in a pre-established sequence .. D Lester B Veenstra MØYCM K1YCM les...@veenstras.com m0...@veenstras.com k1...@veenstras.com US Postal Address: PSC 45 Box 781 APO AE 09468 USA UK Postal Address: Dawn Cottage Norwood, Harrogate HG3 1SD, UK Telephones: Office: +44-(0)1423-846-385 Home: +44-(0)1943-880-963 Guam Cell: +1-671-788-5654 UK Cell: +44-(0)7716-298-224 US Cell: +1-240-425-7335 Jamaica: +1-876-352-7504 This e-mail and any documents attached hereto contain confidential or privileged information. The information is intended to be for use only by the individual or entity to whom they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, be aware that any disclosure, copying, distribution or use of the contents of this e-mail or any documents attached hereto is prohibited. From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On Behalf Of bg...@comcast.net Sent: Tuesday, July 13, 2010 1:52 PM To: digitalradio@yahoogroups.com Subject: Re: [digitalradio] Re: Moving ROS forward in the USA? sorry, my typo. It's in 97.3. (b)(9)
