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

[Gary AL9A]

If I may, let me add on more thing to the MMTTY setup for 60M if you're currently running FSK.

(5)  In MMTTY on the Misc tab change from COM-TxD(FSK) to Sound.

73,
Gary AL9A


  ----- Original Message ----- 
  From: Kai Siwiak 
  To: MMTTY at yahoogroups.com 
  Cc: RTTY 
  Sent: March 29, 2012 7:10 AM
  Subject: Re: [MMTTY] Fwd: ARLB006 NTIA: No Objection to Additional Data Modes on 60 Meters


    
  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
  >
  >
  >
  > ------------------------------------
  >
  > Yahoo! Groups Links
  >
  >
  >
  >
  >
  > 

  [Non-text portions of this message have been removed]



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