In my previous post (below) I omitted a comma in the tone frequency
list. The corrected line is:
[ComboList]
Mark=2125,2000,1700,1445,1415,1275,1170,1000,915,660
73
Kai, KE4PT
Kai Siwiak wrote:
> Hi Joe,
> Looks like ARRL are incrementally seeing the light. I've included my
> recommendation for how we can send the 170 Hz shift / 45.45 baud RTTY we all
> know and love, and adhere to the FCC/NTIA requirements. Repeating from my
> Feb. 28 post to this refelctor, here's one recipe that works:
>
> My reading of the FCC/NTIA rules is that the rules give examples of permitted
> digital modes exemplified by PSK31 and PACTOR-III, so 170 Hz shift RTTY
> should also be OK. The rules state that all the permitted new modes must be
> centered in the 60 m band channels. Also the radio should be configured so
> that an upper SSB signal can be copied in case they need to tell you the
> channel is occupied.
>
> Thus the following RTTY settings should work, with RTTY operating in AFSK
> mode:
> (1) Set the rig to upper SSB (this keeps you consistent with NTIA requirement
> of monitoring the channel) with the dial set to the UPPER SSB channel
> frequency.
> (2) In MMTTY select the MARK frequency to 1415 Hz (see below)
> (3) Set MMTTY to "reverse" (because you are using upper SSB. This changes the
> meaning of MARK and SPACE in MMTTY, but the correct tones are transmitted)
> (4) Set shift to 170 Hz and baud rate to 45.45.
>
> This will have the effect of centering the RTTY tones at the radio dial
> frequency plus 1500 Hz, +/- 85 Hz. In other words at the channel dead center.
> The two tones will be 1415 and 1585 (the real MARK frequency) up from the
> upper SSB dial frequency.
>
> Currently the MMTTY ini file does not include MARK=1415, but you can edit the
> MMTTY.INI file to add 1445 so the Mark= line looks like:
>
> [ComboList]
> Mark=2125,2000,1700,1445,14151275,1170,1000,915,660
>
> Good luck!!!
>
> 73
> Kai, KE4PT
>
>
>
> Joe Subich, W4TV wrote:
>
>> -------- Original Message --------
>> Subject: ARLB006 NTIA: No Objection to Additional Data Modes on 60 Meters
>> Date: Thu, 29 Mar 2012 10:17:03 -0400 (EDT)
>> From: ARRL Web site <memberlist@www.arrl.org>
>> To: w4tv@subich.com
>>
>> SB QST @ ARL $ARLB006
>> ARLB006 NTIA: No Objection to Additional Data Modes on 60 Meters
>>
>> ZCZC AG06
>> QST de W1AW
>> ARRL Bulletin 6 ARLB006
>> >From ARRL Headquarters
>> Newington CT March 29, 2012
>> To all radio amateurs
>>
>> SB QST ARL ARLB006
>> ARLB006 NTIA: No Objection to Additional Data Modes on 60 Meters
>>
>> In response to requests for clarification from the ARRL, the
>> National Telecommunications and Information Administration (NTIA)
>> has confirmed that it has no objection to the use of a broader range
>> of data emissions by amateurs on the five 5 MHz frequencies on 60
>> meters. ARRL's original understanding was that the NTIA preferred
>> that the use of 2K80J2D emission be limited to Pactor III. The NTIA
>> now says that that is not the case.
>>
>> In an e-mail response to ARRL Chief Executive Officer David Sumner,
>> K1ZZ, Karl Nebbia, Associate Administrator of the NTIA Office of
>> Spectrum Management, stated, "NTIA has no interest in limiting the
>> types of emission used by the amateurs as long as the data emission
>> does not exceed the 2.8 kHz bandwidth generated by the upper
>> sideband transmitter." Nebbia referred all further inquiries to the
>> FCC, which "...sets the conditions for use of the five 5 MHz
>> frequencies by the amateurs."
>>
>> The requirement of only one signal per channel remains, as well as
>> the prohibition against automatic operation. The FCC continues to
>> require that all digital transmissions be centered on the
>> channel-center frequencies, which the Report and Order defines as
>> being 1.5 kHz above the suppressed carrier frequency of a
>> transceiver operated in the Upper Sideband (USB) mode. This is
>> typically the frequency shown on the frequency display.
>>
>> Channel USB Suppressed Carrier (kHz) Center (kHz)
>>
>> 1 5330.5 5332.0
>>
>> 2 5346.5 5348.0
>>
>> 3 5357.0 5358.5
>>
>> 4 5371.5 5373.0
>>
>> 5 5403.5 5405.0
>>
>> The ARRL advises amateurs to operate with care when using digital
>> modes in consideration of the fact that hams are secondary users on
>> these frequencies. See the revised 60-Meter FAQ page on the ARRL Web
>> at, http://www.arrl.org/60-meter-faq.
>>
>> The revised ARRL 60-Meter Recommended Practices document can also be
>> found in PDF form on the web at,
>> http://www.arrl.org/files/file/Regulatory/Recommended_Practices_Version_6_5.pdf.
>> NNNN
>> /EX
>>
>>
>>
>> ------------------------------------
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>>
>
>
> [Non-text portions of this message have been removed]
>
>
>
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