[RTTY] [MMTTY] Fwd: ARLB006 NTIA: No Objection to Additional Data Modes on 60 Meters

Thu Mar 29 08:16:59 PDT 2012

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 at www.arrl.org>
>> To: w4tv at 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
>>
>>
>>
>> ------------------------------------
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>>
>>   
>>     
>
>
> [Non-text portions of this message have been removed]
>
>
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