[RTTY] Multiple Decoders

Tue Jan 31 20:58:20 PST 2012

As an experiment, I once ran six instances of MMTTY all from the same 
audio stream with several different profiles. Each instance needed 
about 2% CPU utilization on a 2ghz sempron machine, IIRC. My report 
on this could probably be googled up. Pretty easy to set this up - 
just click on the MMTTY icon several times and change profiles and 
parameters on each instance as needed. I was receiving only.

I have run different demods in this way also - e.g., FLDIGI with MMTTY.

I routinely run two instances of MMTTY, using different profiles.

Jerry W4UK

At 11:34 PM 1/31/2012, Dick Flanagan wrote:
>I know some folks run multiple RTTY decoders, with one of them often
>being MMTTY and the other a DXP38.  Is it possible to run these two
>decoders with one radio or is SO2R necessary?
>
>Dick
>--
>Dick Flanagan K7VC
>dick at k7vc.com
>
>On 1/31/2012 8:15 PM, Joe Subich, W4TV wrote:
> >
> >
> >> The problem is the DIN jack - the FT857 data in/out aren't the same
> >> as audio in/out to the DXP38. Data Out from the DIN plug is not
> >> sending audio that the DXP38 can decode.
> >
> > Based on what you wrote below, you have DATA IN and DATA OUT reversed
> > (and you are using FM/discriminator audio instead of product detector
> > audio).  I know the information I've given works with any sound card
> > as that's what is used in all of the cables for microHAM products.
> >
> > It also works with any of the other "industry standard" miniDIN6
> > "DATA" jacks - in Icom IC-703, IC-706mkIIg, IC-7000, IC-746Pro, Kenwood
> > TS-480, Yaesu FT-8x7, 450, 950,
> >
> >> Joe, I just looked at your pinouts, and it doesn't match the diagram
> >> on page33 or the manual.
> >
> > Page 33 of the manual does not give pin numbers - I based my numbers
> > from the identification of the upper right pin (Data Out) as "pin 5"
> > in the diagram on page 18.  However, if one uses the "standard" pin
> > assignments used by other manufacturers the pin clockwise of the
> > keyway (identified as pin 1 on page 18) is "pin 5".  In that case the
> > proper connections are
> >
> > Pin 1 - audio from the sound card to the transceiver
> > Pin 2 - Ground/audio return
> > pin 3 - PTT
> > Pin 4 - discriminator out or FSK In (depending on model)
> > Pin 5 - audio from the radio to the sound card
> > pin 6 - squelch
> >
> > "Industry standard" numbering places the keyway *down* and numbers
> > left to right top row to bottom row.   The "standard" pin numbers
> > are shown in the FT-450 and FT-950 manuals but the FT-817/857/897
> > manuals *all* lack *any* pin numbers!
> >
> > 73,
> >
> >      ... Joe, W4TV
> >
> >
> > On 1/31/2012 10:29 PM, Nelson Moyer wrote:
> >> Joe,
> >>
> >> On a hunch, I connected the speaker out on the FT857 to the AF In on the
> >> DXP38. I can decode RTTY, but the PTT and AF In through the data 
> jack on the
> >> FT857 won't key the radio on transmit. The problem is the DIN jack - the
> >> FT857 data in/out aren't the same as audio in/out to the DXP38. Data Out
> >> from the DIN plug is not sending audio that the DXP38 can 
> decode. I think I
> >> can solve the problem by connecting the AF Out and PTT from the 
> DXP38 to the
> >> appropriate mic jack pins of the FT857. The problem is that the FT857 uses
> >> RJ45 mic connectors, so I have to make up a cable with RF45 on one end and
> >> two RCA plugs on the other end.
> >>
> >> I don't know why the Data jack doesn't work with the DXP38 on RTTY, but is
> >> sure doesn't provide usable audio to the DXP38. I was hoping somebody had
> >> figured out how to configure RTTY on the FT857 using the DIN plug from the
> >> Data jack.
> >>
> >> I was trying to avoid using sound card RTTY for now, since I'm 
> more familiar
> >> with the DXP38 and it's software. I hate to jump into pileups using
> >> unfamiliar hardware and software.
> >>
> >> I guess I really don't need another RTTY Q with HK0NA, but I was doing so
> >> well on the leader board until the K3 failed, that I hated to give it up.
> >>
> >> If all else fails, I have a RigBlaster Plus that I can hook up to the
> >> desktop. I've been using it on PSK31 with my laptop.
> >>
> >> Nelson, KU0A
> >>
> >> -----Original Message-----
> >> From: Joe Subich, W4TV [mailto:lists at subich.com]
> >> Sent: Tuesday, January 31, 2012 9:00 PM
> >> To: Nelson Moyer; RTTY
> >> Subject: Re: [RTTY] Lets try again on the FT857 problem
> >>
> >>
> >> Try,
> >>
> >> pin 1 Data IN to TX Audio ("line out") on your sound card
> >> Pin 2 ground to ground/chassis/audio return on your interface and SC.
> >> Pin 3 PTT to PTT output on your interface
> >> Pin 4 data out (9600 bps/discriminator audio for FM) - not used
> >> Pin 5 Data Out (1200) to RX Audio ("line in") on your sound card
> >> Pin 6 Squelch - not used
> >>
> >> Labels are from the perspective of the FT-8x7
> >>
> >> Pin 5 is recommended for audio recording (would work well with a
> >> sound card or TNC) on pg 18 of the manual.
> >>
> >>
> >> 73,
> >>
> >>       ... Joe, W4TV
> >>
> >>
> >> On 1/31/2012 8:42 PM, Nelson Moyer wrote:
> >>> Group,
> >>>
> >>>
> >>>
> >>> I made up a new DIN data cable for the FT857 with the following
> >> connections:
> >>>
> >>>
> >>>
> >>> Pin 1 - Data Out - 1200 baud - Green - Not used
> >>>
> >>> Pin 2 - PTT - PTT - Orange - To PTT input on DXP38
> >>>
> >>> Pin 3 - Data In - Brown - To AF Out input on DXP38
> >>>
> >>> Pin 4 - GND - Black - To ground lug on DXP38
> >>>
> >>> Pin 5 - Data Out - 9600 baud - Red - To AF In on DXP38
> >>>
> >>> Pin 6 - SQL - Yellow - Not used
> >>>
> >>>
> >>>
> >>> Serial Port -  COM1
> >>>
> >>>
> >>>
> >>> 9600 baud - 8 data bits - no parity - 1 stop bit - Hardware flow control
> >>> (per HAL tech support)
> >>>
> >>>
> >>>
> >>> FT857 menu settings:
> >>>
> >>> RTTY-L
> >>>
> >>> +170
> >>>
> >>>
> >>>
> >>> Problem:
> >>>
> >>> The serial port recognizes the modem, DXPWin 3.0 opens, configured for
> >>> baudot RTTY, FT857 set to Digital and tuned to RTTY signal, NO AUDIO
> >>> detected by DXP38. Nothing, not even band noise.
> >>>
> >>>
> >>>
> >>> The DXP38 was working just fine with my K3 until the 100 watt PA failed
> >>> calling HK0NA on 10 meters. I cannot figure out why I have no audio from
> >> the
> >>> FT857 to the DXP38 when all the connections are correct. Are there some
> >>> obscure menu settings to enable the data jack on the FT857? I can't find
> >> any
> >>> other menu settings that would affect RTTY.
> >>>
> >>>
> >>>
> >>> Nelson, KU0A
> >>>
> >>>
> >>>
> >>> PS
> >>>
> >>>
> >>>
> >>> The K3 went back to Elecraft today, and I'm stuck with the FT857 until it
> >>> comes back.
> >>>
> >>>
> >>>
> >>> _______________________________________________
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> >>>
> >>
> >>
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> >
> >
> >
> >
> >
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