[RTTY] Multiple Decoders

Tue Jan 31 20:34:06 PST 2012

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.
>>>
>>>
>>>
>>> _______________________________________________
>>> RTTY mailing list
>>> RTTY at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rtty
>>>
>>
>>
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