[WriteLog] [RTTY] MMTTY and EXTFSK at 75 baud...

[Joe Subich, W4TV]

 > If I use 75 baud outside the BARTG 75 Sprint do other stations
 > also have to be running 75 baud to decode my transmission?

Yes.

 > If I'm set at 75 baud will I be able to decode others at 45.45 baud?

No.

 > In other words, do both stations have to be at
 > the same baud rate for RTTY communication to happen?

Absolutely.


73,

    ... Joe, W4TV

On 6/6/2010 6:47 PM, Gary AL9A wrote:
> Very interesting stuff re the 75 baud setup in WL and MMTTY.  As reported
> earlier my setup with the MK II works at 75 baud.  That's good!  The bad is
> that I've since discovered the XYL has planned out my day next Sat. that
> will prevent me from being on the air for the BARTG 75 Sprint - bummer!
>
> But as a result of trying the 75 baud speed I'm curious.  If I use 75 baud
> outside the BARTG 75 Sprint do other stations also have to be running 75
> baud to decode my transmission?  If I'm set at 75 baud will I be able to
> decode others at 45.45 baud?  In other words, do both stations have to be at
> the same baud rate for RTTY communication to happen?
>
> 73,
> Gary AL9A
>
>
> ----- Original Message -----
> From: "Don Hill AA5AU"<aa5au at bellsouth.net>
> To:<writelog at contesting.com>;<rtty at contesting.com>
> Sent: June 06, 2010 9:01 AM
> Subject: Re: [WriteLog] [RTTY] MMTTY and EXTFSK at 75 baud...
>
>
> You are correct Joe.  When changing the mode in WriteLog, when using the
> MMTTY plug-in, it changes the BaudRate setting in MMTTY to
> 74.2 and RTTY transmission remains at 45 baud.  However, if you simply
> change it to 75 in MMTTY Setup ->  Decode tab, then it starts
> to work.  Closing the window as you say also works.  Same goes when going
> back to 45 baud.
>
> Using WriteLog's RTTY decoder "Soundboard FSK" or "Soundboard AFSK" does not
> have this problem.
>
> I've written a webpage with this information for WriteLog users.  It can be
> viewed at:
>
> http://rttycontesting.com/75baudrtty/75baudrtty.html
>
> 73, Don AA5AU
> http://www.aa5au.com
> http://www.rttycontesting.com
>
> -----Original Message-----
> From: Joe Subich, W4TV [mailto:lists at subich.com]
> Sent: Sunday, June 06, 2010 11:32 AM
> To: Don Hill AA5AU; rtty at contesting.com
> Subject: Re: [RTTY] MMTTY and EXTFSK at 75 baud...
>
>
>   >  How do you set up MMTTY stand-alone for 75 baud RTTY transmission???
>   >  Can't seem to find it.
>
> Set Baud Rate on the "Decode" tab in the MMTTY setup.
>
>   >  I was using the microkeyer with WriteLog's RTTY decoder (not MMTTY>
> plug-in).
>
> I note WriteLog is setting the baud rate to 74.2 when the user selects "75
> baud (100 WPM) Baudot"!  I don't know if it makes a
> difference.
>
> I have double checked 100 WPM (75 baud) generation with both the original MK
> and MK II with the plug-in set manually to 75 baud.
> Both units decode correctly using either the MMTTY plug-in or the WriteLog
> Stereo Soundboard (AFSK) decoder as well as fldigi or
> MMTTY stand alone.
>
> I can confirm your findings that there is no way to do 75 baud FSK with a
> USB port.  The MMTTY plug-in will not call EXTFSK and
> WriteLog's "software FSK" is limited to 60 WPM.  Other than a very old USB
> to serial adapter (if you can find current drivers), the
> only "serial converters" that appear to support 5 bit codes at data rates
> below 110 baud are now the Edgeport product line
> (http://www.digi.com/products/usb/edgeport.jsp#overview).
>
> 73,
>
>      ... Joe, W4TV
>
> On 6/6/2010 11:30 AM, Don Hill AA5AU wrote:
>> How do you set up MMTTY stand-alone for 75 baud RTTY transmission???
>> Can't seem to find it.
>>
>> I was using the microkeyer with WriteLog's RTTY decoder (not MMTTY
>> plug-in).  Need to get this stuff tested as soon as possible. Maybe it
>> does work with the MMTTY plug-in, don't know how to make MMTTY
>> transmit 75 baud.
>>
>> Thanks!
>>
>> 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 Joe Subich, W4TV
>> Sent: Sunday, June 06, 2010 10:26 AM To: rtty at contesting.com; DONALD A
>> HILL Subject: Re: [RTTY] MMTTY and EXTFSK at 75 baud...
>>
>>
>> Don,
>>
>>> After further testing, the microham microkeyer will diddle at>   75
>>> baud but timing appears off to the point where it does not>
>> send 75 baud intelligently.
>>
>> That's not the case.  Just double checked here and microKEYER,
>> microKEYER II, and DigiKeyer work correctly at 75 baud with MMTTY.
>>
>> I have not checked them with the MMTTY plug-in specifically under
>> WriteLog but will do so later today.
>>
>> 73,
>>
>> ... Joe, W4TV
>>
>> On 6/6/2010 10:51 AM, Don Hill AA5AU wrote:
>>> After further testing, the microham microkeyer will diddle at 75 baud
>>> but timing appears off to the point where it does not send 75 baud
>>> intelligently.
>>>
>>> 73, Don AA5AU http://www.aa5au.com http://www.rttycontesting.com
>>>
>>> -----Original Message----- From: writelog-bounces at contesting.com
>>> [mailto:writelog-bounces at contesting.com] On Behalf Of Don Hill AA5AU
>>> Sent: Sunday, June 06, 2010 9:05 AM To: rtty at contesting.com;
>>> writelog at contesting.com Subject: Re: [WriteLog] MMTTY and EXTFSK at
>>> 75 baud...
>>>
>>> Thanks for the valuable information Bob!  WriteLog users have an
>>> option available that does not use the MMTTY plug-in.
>>>
>>> I have confirmed that the MMTTY Plug-in for WriteLog will not work on
>>> 75 Baud, this includes with or without using Software-generated FSK.
>>>
>>> However, you CAN use the Soundboard FSK (and Soundboard AFSK) option
>>> under TU Type in Rttyrite to transmit and receive 75 baud IF you
>>> DON'T normally use Software-generated FSK.  Soundboard FSK (or
>>> Soundboard AFSK) is WriteLog's built-in soundboard decoder with it's
>>> own
>> tuning indicator.  I used this decoder for years before MMTTY came
>> about and this decoder is very good.
>>>
>>> I tested the Soundboard FSK generator using a standard legacy COM
>>> port to a homebrew transistor FSK interface and using a virtual COM
>>> port with my Microham microkeyer and both appeared to transmit 75
>>> baud fine.  This means that if you use a Rigblaster or any other type
>>> of commercial interface to generate FSK on a standard legacy COM
>> port, you can use the Soundboard FSK (or AFSK) TU option in WriteLog.
>>>
>>> But if you normally use Software-generated FSK with WriteLog to send
>>> RTTY, you will not be able to send 75 baud.
>>> Software-generated FSK was designed for 45 baud only.
>>>
>>> I agree with Bob in that if you plan on participating in the 75 baud
>>> contests, try your alternative set up ahead of time.
>>>
>>> Thanks again to Bob for bring this up.  I will update
>>> rttycontesting.com today with this information and maybe a tutorial
>>> on how to use the Soundboard FSK (or AFSK) option with WriteLog.
>>> But it's should work just fine.  Just go to the TU Type menu in
>>> Rttyrite and choose "Soundboard FSK" (or AFSK if you are running
>> AFSK).  I should be around today if you have any questions or
>> concerns, shoot me a direct reply.
>>>
>>> 73, Don AA5AU http://www.aa5au.com http://www.rttycontesting.com
>>>
>>> -----Original Message----- From: writelog-bounces at contesting.com
>>> [mailto:writelog-bounces at contesting.com] On Behalf Of Robert Chudek
>>> - K0RC Sent: Saturday, June 05, 2010 11:04 AM To:
>>> N1MMLogger at yahoogroups.com; cq-contest at contesting.com;
>>> rtty at contesting.com; writelog at contesting.com; MMTTY at yahoogroups.com
>>> Subject: [WriteLog] MMTTY and EXTFSK at 75 baud...
>>>
>>> This is a FYI message...
>>>
>>> Operators planning to participate in the 75 Baud contests this
>>> weekend and next should be aware IF they are using the popular EXTFSK
>>> driver, this driver is hard coded to transmit at 45.45 Baud.
>>> Typically this driver is used to generate FSK&    PTT keying (not
>>> AFSK) by RTTY
>> software, MMTTY in particular.
>>>
>>> Dave Bernstein, AA6YQ, verified this (documented) limitation. He
>>> maintains the MMTTY source code.
>>>
>>> How do you know whether you are using the EXTFSK driver? Bring up
>>> your software configured for a RTTY contest. Look at the bottom of
>>> the screen to see if there is an EXTFSK 1.05 button displayed on the
>>> Windows task bar. If it is shown, you are using the driver and
>> will only be able to transmit at 45.45 Baud.
>>>
>>> There are many other RTTY packages that will allow 75 Baud TX speeds.
>>> If you were planning to participate in high speed RTTY, it would be a
>>> good time to investigate other options if you are currently
>> using the EXTFSK driver.
>>>
>>> 73 de Bob - KØRC in MN
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>>
>>
>
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