The key appears to be whether the information is printed immediately or not. In 97.3, RTTY is defined as "Narrow-band direct-printing telegraphy." So text is B if it is printed or D if it is not printed.
It's interesting that emission types B7W, B8W and B9W (ISB) are still allowed, so you can legally transmit data anywhere that image transmission is allowed if it is accompanied by analog or digital voice or image transmission or even by CW or RTTY. 73, John KD6OZH ----- Original Message ----- From: KV9U To: digitalradio@yahoogroups.com Sent: Friday, November 17, 2006 02:36 UTC Subject: Re: [digitalradio] 1000 Hz Olivia under USA new rules ? Joe, Your explanation may explain what the FCC meant when they wrote: "To accommodate the concern raised by ARRL, however, we will revise our rules to clarify that the 500 Hz limitation applies only to the emission types we are adding to the definition of data when transmitted on amateur service frequencies below 30 MHz. By amending the rule in this manner, the 500 bandwidth limitation will not apply to other data emission types or amateur service bands in which a higher symbol rate or bandwidth currently is permitted." Even though they are actually "C" or FAX modes, the FCC's decision makes the following into "data" modes: A1C = DSB AM digital FAX with no subcarrier F1C = FM FAX digital modulation with no subcarrier (MFSK) F2C = FM digital FAX with subcarrier J2C = Digital FAX with subcarrier J3C = Analog FAX from SSB transmitter and then add to that, the regular "data" of J2D. So it would not necessarily be text modes per se, but whether the ITU emission classification and/or the FCC considers as "data." It may be that a wide shift RTTY would still be legal since it appears that they did not change that part of the rules. The critical issue is the type of information to be transmitted and whether it is data or machine readable telegraphy. While the following modes are data (J2D) Pactor 3 = 2K20J2D Clover 3 = 2K0HJ2DEN (but can also be considered BEN so that complicates things) Q15X25 = 2K00J2D PSK, MFSK, possibly Olivia (mostly MFSK), Domino, perhaps MT-63 are J2B modes and not J2D? I still am unable to just know this by looking at the information and I have to look at other definitive sources for delineating the ITU classification. I would expect that we will be able to get some help from ARRL HQ on this since they could publish a list of modes along with their classifications. That would help a great deal. 73, Rick, KV9U Joe Veldhuis wrote: >In my opinion, this is absolutely WRONG. I have said this here before, >it all comes down to what is considered "data". > >The new restrictions only cover content type "D", which is "Data, >telemetry or telecommand". It does *NOT* include type "B", which is >"telegraphy for automatic reception". It is already established that >RTTY is content type "B" in common use. Therefore, the same type of >traffic being sent with a mode like Olivia, MT63, Pactor-III, etc. must >be considered type "B" as well, the modulation scheme is irrelevant to that. > >My interpretation, which is as good as any at this point, is that >"telegraphy" is plain text to be read and interpreted by a human >operator on the spot, whereas "data" is information (including plain >text) which was or is intended to be stored as a file or interpreted by >a computer. Thus: > >Keyboard-to-keyboard QSO: Telegraphy (J2B) >Automated exchange of QSO information: Data (J2D) >MultiPSK's Reed-Solomon mode ID feature: Data (J2D) >Loading and sending a text file: Data (J2D) >Manually delivering/forwarding NTS traffic: Telegraphy (J2B) >Automatically forwarding NTS traffic: Data (J2D) >Forwarding mail: Data (J2D) >Reading mail: Data (J2D) (it was stored in a file on the BBS) >Sending a PDF/ODF/etc: Data (J2D) >Sending a JPG/PNG/etc: Image/Fax (J2C) >Sending a MNG/animated GIF/etc: Television (J2F) > >So, if you're simply having a keyboard-to-keyboard QSO, a 1 or 2 >kHz-wide mode is legal. > >As an aside, as long as you don't send any text (other than the Pic: >statement), the MFSK16 image mode is legal to use in the phone bands >right now. Though it does send a little incidental digital text, >consider the VIS codes in wide SSTV, and the QSO data burst that MMSSTV >sends. No one has ever lost their ticket over that... > >-Joe, N8FQ > > >
