I really appreciate all the replies to my inquiry. The response
provided by Steve, KB3MM, is exactly what I was looking for.
73
Tom K4RV
----- Original Message -----
From: Steve Baron - KB3MM
To: Tom Sessions
Sent: Saturday, July 13, 2002 00:50
Subject: Re: [WriteLog] cw keying, com port
Some where between plus 3 and plus 12 for keydown.
Some where between minus 3 and minus 12 for key up.
----- Original Message -----
From: "Tom Sessions" <k4rv@mindspring.com>
To: <writelog@contesting.com>
Sent: Friday, July 12, 2002 21:39
Subject: [WriteLog] cw keying, com port
> When configured for "PC Generates" CW on a COMM port, WriteLog sends CW on
> the DTR line of the COMM port.
>
> The above was taken from the help section of Writelog. Would someone
> please further clarify it for me? I measure -5.5 VDC between pin 4(DTR)
and
> pin 5(GND) of my selected DB9 com port with no keying going on.
> Does the help explanation mean that WriteLog will key dits and dahs at
0
> VDC with -5.5 VDC in between? Does it mean WriteLog will key dits and
dahs
> at +5.5 VDC with -5.5 VDC in between? Or are there some inverse or other
> key up/ keydown voltages?
>
> In essence, what I am asking is what is the DTR pin voltage for "key
> down", and what is the same DTR pin voltage for "key up" ?
>
> Thanks
> Tom K4RV
>
> _______________________________________________
> WriteLog mailing list
> WriteLog@contesting.com
> http://lists.contesting.com/mailman/listinfo/writelog
>
|