Ok, when I key the switch, The software recognizes the keydown on graphical meter (pegged out), likewise, the unkeyed graph is near 0. I hear the 810 Hz oscillation through the speaker. However, the software is supposed to tell the difference between the dit's and dah's, and print text as you go. If I press a short keystroke, it will ocassionally recognize a letter E. Ocassionally, a longer keystroke will produce a T. this is all very intermittent, with some double E's and hardly ever two letters correct in a row.When you say that its having a hard time, do you mean that it works sometimes, or it has never worked
Connecting the very high output of your tone to a line input (100mV) would help
Are you sure the software is looking for a tone?
heathtech said:Audioguru:
Connecting the very high output of your tone to a line input (100mV) would help
Thanks , Audioguru. So I still need to attenuate the input, and connect the generator/keyer to the line input at 100mV. This is obviously a phono pug, with two channels. Should I hook the positive output of the generator to both or just one of the stereo channels, or does it matter?
SteveZ:
Are you sure the software is looking for a tone?
I am not sure, but I am assuming that the audio inputs of the card are isolated, so it would require AC for them to see anything. Can anyone confirm that? I was just working on an assumption there. Like I said before, I am studying morse code in preperation for my Ham license, and from what I understand, Ham operators plug a keyer into the mic input of their radio equipment and communicate with morse by modulationg a continuous wave (CW) audible signal on the carrier frequency , creating dah's and dit's that can be heard at the reciever. I haven't purchases or built any real equipment yet, because I am not going to take for granted that I will pass the test. Therefore, I am working on assumptions, and the freeware software only says to plug a keyer into the mic input, not specifying the characteristics of the keyer. Actually, it did say a CW keyer, which logically implies that the keystrokes generate a continuos wave. I think I am correct. Anyway, I just happened to have a tone generator lying around that I used a long time ago for testing speakers, and I figured it might work if I wired up the momentary switch and mono jack, just for fun and for practicing. The name of the software is CW_Player, for anyone interested.
Audioguru, I don't have any phono jacks lying around, just mono. If I solder the shield wire to the outside conductor and the positive to the inside conductor of a mono plug, will one of the stereo channel inputs on the line input work? In other words, is the phono female jack designed in such a way that a mono plug will work with one channel?
stevez said:healthtech - I read your last post quickly so bear with me. CW isn't modulated except that it's turned on and off. It is a continuous sine wave at the frequency of interest. Some intelligence can be conveyed by turning it on and off with the listener making the connection between the dits/dahs and what they mean.
If the CW is modulated then it is no longer CW, it is something else. That may seem trivial at this point but you'll soon understand if you keep studying.
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