Re: [IRCA] Navtex

[<martinfoltz@xxxxxxx>]

Hi Chris, took a while to respond. I haven't had the radio and SeaTTY running in a while.

Open the Help tab and open Contents to read about the AFC settings.

I use a tube receiver that drifts some so I will have wider settings. The AFC basically lets the cursors search for the signal. Bigger number means it can move further from the set frequency. AFC Global is the one that you want to let roam a bit. You'll have to play with it and see how it works on your receiver.

I don't use SQL but it acts like a noise filter.
The NORMAL has some applications but I have rarely used it, only on RTTY where I was tuned high in frequency.

Listening to 518 kHz is fun. I've heard NMO, NMC, NMW, NMQ, NMG, NME, VAJ, VAE, NOJ.
You can also tune in to shortwave frequencies and copy their weather broadcasts.

Have fun!

Martin

> Date: Sun, 27 Sep 2015 12:43:43 -0700
> From: "Chris Black" <n1cp@xxxxxxxxxxx>
> To: "Mailing list for the International Radio Club of America"
> 	<irca@xxxxxxxxxxxxxxxx>
> Subject: Re: [IRCA] Navtex
> Message-ID: <B4755CC2F5DF482FBCAB24C501E61ED7@ChrisPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=original
> 
> Thanks Mmartin for getting back. BTW, I used to live in Mission Viejo way 
> back in another life. Bet it's grown! Am now sitting out the "seventh inning 
> stretch" of this game in an antenna restricted community in Redmond WA. I 
> managed to sneak in a few antennas, a Wellbrook loop and a couple of long 
> wires but it's a far cry from my previous location on Cape Cod.
> 
> Anyway, would like to get back to some of the utilities I used to do a few 
> years ago. Have some questions on setting up SeaTTY for Navtex.
> 
> NORMAL - how to set and when/why change
> AFC local deviation -  ?
> AFC global deviation  - ?
> AFC on or off -- probably ON?
> SQL on or off and what number (default is 50 but not sure what that means)
> 
> I am using an Elad SDR in CW mode, which I recall works best for data modes.
> 
> Also just curious where does the 1,700 for center frequency (default 
> sub-carrier) come from? is that SITOR B specific?
> 
> Any other tip, tricks or comments MOST appreciated.
> 
> best 73 de Chris
> Redmond WA

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