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Re: [RTTY] Icom IC7600 and MMTTY

To: "Jim W7RY" <w7ry@arrl.net>, <rtty@contesting.com>
Subject: Re: [RTTY] Icom IC7600 and MMTTY
From: "Dave AA6YQ" <aa6yq@ambersoft.com>
Date: Sat, 10 Oct 2009 13:07:27 -0400
List-post: <rtty@contesting.com">mailto:rtty@contesting.com>
>>>AA6YQ comments below

-----Original Message-----
From: rtty-bounces@contesting.com [mailto:rtty-bounces@contesting.com]On
Behalf Of Jim W7RY
Sent: Saturday, October 10, 2009 12:58 PM
To: rtty@contesting.com
Subject: Re: [RTTY] Icom IC7600 and MMTTY


Cool.  Thanks Dave... A few more questions....

Since it emulates a sound card, it must be AFSK keying so the microphone
gain has to be adjusted for proper level?

>>>Yes its AFSK, but the transmit audio uses a separate path that is not
governed by microphone gain. I adjusted the level using the Windows
Multimedia Mixer.


Is FSK available and does it work?

>>>For FSK transmission, you need an external interface to convert the level
of the FSK data emitted by MMTTY/EXTFSK from a serial port TxD, RTS, or DTR
signal to the FT-7600's RTTY input on ACC-1 pin 1.


Did you compare the "quality" of the decode operation to a computer mounted
high quality sound card? (i.e. SoundBlaster)?

>>>No. I just made a QSO with a European station from the HRO store in Salem
NH to make sure things worked in both directions. You might ask on the Yahoo
IC7600 group:

<http://groups.yahoo.com/group/icom7600>

   73,

        Dvae, AA6YQ

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