[WriteLog] FSK invert

[Mike McCarthy, W1NR]

Looks like they went with the way Kenwood does it...

If you are using an opt isolator, reverse the connections to the input to
invert (or is it revert) the keying.

Mike, W1NR

-----Original Message-----
From: writelog-bounces at contesting.com
[mailto:writelog-bounces at contesting.com] On Behalf Of K4SB
Sent: Saturday, February 26, 2005 10:16 AM
To: writelog at contesting.com
Subject: Re: [WriteLog] FSK invert

John L Merrill wrote:
> I'm using an OmniVI+ with writelog and mmtty and I can't get the program
to
> invert the tranmit fsk keying. Am I missing something simple?

Well, TenTec built, for reasons I can't even imagine, the Omni so it
transmits "upside down" on FSK.

The most simple way to change it to where it works properly is to use
the usual transtor keying interface from a comm port (RTS), but GROUND
the BASE, and feed the Emitter through the resistor.

This in effect turns the RTS line upside down, and the the OMNI turns
it "upside down again, which now is "right side up".

73
Ed
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