[RTTY] Interface Problems

[Don Hill AA5AU]

Ed, I'm curious as to why you are trying to key FSK on a parallel port and why you aren't using the Rigblaster Plus for FSK?

Check to make sure the radio is set up for high tones (2125/2295) 170 Hz (these are the default settings) in menu 6-2.

There's a simple test you can do to see if the radio is shifting FSK OK.  Disconnect the line from your FSK interface but leave it
connected to the RTTY jack on the radio.  Key the radio into a dummy load with the monitor on and you should hear a steady MARK (or
SPACE) tone (2125 or 2295 Hz).  With the radio keyed, short the FSK input of the radio to ground.  The tone you hear should shift
170 Hz either higher or lower depending how the FSK polarity (menu 6-1) is set in the radio.  If an open sends a 2125 Mark tone,
then shorting should send a 2295 Hz Space tone or vice versa.

If this works, then there's something going on with your interface.  Almost sounds like if you are using the parallel port, then
maybe you are using the wrong pin.  FSK comes from D0 pin 2 on a parallel port I believe (see http://www.g4zfe.com/rtty.html) Not
too many people use parallel ports to key FSK.

It may be easier to use the Rigblaster Plus for FSK.

73, Don AA5AU
http://www.aa5au.com
http://www.rttycontesting.com 

-----Original Message-----
From: rtty-bounces at contesting.com [mailto:rtty-bounces at contesting.com] On Behalf Of Edwin Karl
Sent: Monday, December 13, 2010 9:39 PM
To: Iain MacDonnell - N6ML
Cc: RTTY at contesting.com
Subject: Re: [RTTY] Interface Problems

Yes, That's the issue, using the FSK input (RTTY). I use the packet input for FSK, so

On 12/13/2010 9:27 PM, Iain MacDonnell - N6ML wrote:
> Hi Ed,
>
> Not sure what you mean by "a siren like tone" .. could it be that the 
> tone (pitch) that the MP is using is just higher than you're 
> accustomed to?
>
> I'm not sure that you can change that on the MP, although I've never 
> used one for RTTY.
>
> 73,
>
>      ~Iain / N6ML
>
>
> On Tue, Dec 14, 2010 at 3:03 AM, Edwin Karl<edk0kl at centurytel.net>  wrote:
>> Hi folks,
>>
>> I'm a neophyte when it comes to FSK. Been using AFSK for some time 
>> and tried to make the switch to FSK, what a problem.
>>
>> Equipment:
>> FT-1000MP MKV, Dell D400 Laptop
>> Rigblaster plus, not for FSK only AFSK, home made interface for FSK, 
>> (2 transistors feeding PTT, Shift and ground on back of radio).
>> The PTT works fine, the AFSK works fine using Com 1. FSK keys but a 
>> siren like tone comes out not at all the "blety-beep" of RTTY. 
>> Software MMTTY for AFSK, Also using MMTTY on FSK using parallel port, 
>> EXTFSK and DLPORTIO
>>
>> What am I doing wrong? Assuming you can decipher what I'm trying to say ...
>>
>> Thanks
>>
>> ed K0KL
>> _______________________________________________
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>> RTTY at contesting.com
>> http://lists.contesting.com/mailman/listinfo/rtty
>>
>
>
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