Don't think it's a problem,
Mark is when pin 7 goes to ground,
If you connect TX data to this, then it should be set to mark 'LOW'
if you run it through an inverted isolation buffer, like a 4N21, then the
TX Data Low is high on the other side. TX High engages the LED in the 4N21
making the open collector go LOW...
Hope that helps.
Best wishes,
Rich
K5SF
>From: "Rick Williams" <rick.williams@telus.net>
>Reply-To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
>To: "TenTec List" <TenTec@contesting.com>
>Subject: [TenTec] Orion FSK tone reversed?
>Date: Thu, 4 May 2006 19:09:45 -0700
>
>I have recently set my Orion (565) up to operate FSK. (Yes I too now hate
>soldering 7-pin DIN connectors!) My first QSO was successful but the
>operator in the Ukraine suggested my tones were reversed. I checked the
>software and the Orion OTHER menu and the Mark is set at the default Mark
>Low. (If this refers to the frequency of the MARK tone itself, as
>described
>on page 32 of the manual, it should be correct.)
>
>I decided to review the reflector archives and K3NA noted the same problem
>and he suggested the Orion configuration should be set to Mark High:
>
>
>http://lists.contesting.com/archives//html/TenTec/2006-02/msg00330.html
>
>I consequently set the FSK in the "Other" menu to FSK Tx Data - Mark HIGH.
>Now my FSK signal is easily received. I have tried both Version 2 and
>Version 1 firmware and the 'problem' is consistent in both versions.
>
>This is a new mode for me and I may be out to lunch but I'm wondering if
>others have noticed this problem when operating in FSK? Have Orion II
>users
>noticed a similar problem? (I have notified ditsnbits suggesting that they
>look into this and perhaps reconfigure the default settings accordingly.)
>
>73,
>
>Rick
>VE7TK
>
>Website: http://www3.telus.net/ve7tk
>
>
>
>
>
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