I've was alerted that the link to the ExtFsk106 file is broken and indeed it
is. I've sent email to Ken VE5KC to have the issue resolved.
73, Don AA5AU
From: Don AA5AU <aa5au@bellsouth.net>
>To: Louis Ciotti <lciotti1@gmail.com>; "rtty@contesting.com"
><rtty@contesting.com>
>Sent: Wednesday, April 27, 2011 2:37 PM
>Subject: Re: [RTTY] FSK and CAT via 1 serial port
>
>I believe what you say is probably true about CAT using TxD. And yes, FSK is
>"traditionally" keyed on the TxD line of a serial port. However, it can be
>keyed on other lines as well depending what software you are using. If you
>use MMTTY, then you can also key FSK on DTR (and probably RTS but this
>is sometimes not desireable because RTS is normally used for PTT but you can
>key PTT via radio control on most radios and use RTS for FSK with MMTTY).
>DTR traditionally is used to key CW. So if you're new interface includes CW
>keying on DTR, then you can build some sort of switch to move keying to either
>the CW port or FSK port on your transceiver depending on what mode you are
>using at the time.
>
>In MMTTY, you can change the FSK keying line via ExtFsk (latest version is
>ExtFsk106), which is a separate plug-in download to MMTTY and can be found on
>the MMTTY site here:
>
>http://hamsoft.ca/pages/mmtty/ext-fsk.php
>
>This should also work with most or all programs that use the MMTTY engine,
>such as N1MM et al. WriteLog, which uses a 3rd party MMTTY plug-in, also has
>provisions for keying FSK via DTR along with software-generated through a
>USB-to-serial adapter.
>
>Having said all this, the simplest solution may be to purchase a USB-to-serial
>port adapter and add another serial port to the computer. You can then build
>a simple transistor keying circuit for FSK or purchase a W3YY opto-isolated
>interface and hang it off the adapter. The choice is yours.
>
>73, Don AA5AU
>
>
>
>From: Louis Ciotti <lciotti1@gmail.com>
>>To: rtty@contesting.com
>>Sent: Wednesday, April 27, 2011 12:38 PM
>>Subject: [RTTY] FSK and CAT via 1 serial port
>>
>>Hello,
>>
>>I am looking for some validation on the information I have gathered via the
>>web. I am working on building up an all inclusive interface box for my
>>IC-718 to PC. It is going to have the sound card interface, CI-V interface,
>>CW key, and I want FSK but that is where my question is. From what I have
>>read, FSK via serial port is done by toggling the TX pin. The TX pin is of
>>course also used on the CI-V rig control connection. Is this correct? if
>>so looks like I will have to have 2 serial ports if I want to use FSK rather
>>than AFSK right?
>>
>>Thanks,
>>
>>Lou
>>K2LRV
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>>
>>
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