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[linrad] Re: Knoppix CD audio
Rein, Good Morning and thanks for the input.
I will go look at that today. I think I understand the controls you are
speaking about, but will print this and take it to the shack with me. It
will be a while before I can try it, as It is expected to rain later in the
day, and I have some Honey-do's to take care of before that happens. If you
are not familiar with Honey-do's, that is when your wife says, Honey do
this, and Honey do that, etc.
73,
Mike
At 08:57 PM 5/13/2005 -0700, you wrote:
> Hi Mike,
>
>The first message went out by accident! Phone call broke u the internet
>here and it slipped through! Soory
>
>You must have a receiver there, Tune the receiver to a signal on 40 or 80
>and make sure you hear a cw
>signal in your headphone or speaker.. Connect the output audio of your
>receiver, headphone or what have
>you and watch the cw signal on the frequency display of linrad. You
>should see a peak being modulated by the
>signal ( 300 - whatever Hz most likely 3000 Hz) You might also see the
>pass band of your receiver or the xtal filter.
>There will be a higher noise level over limited width of the display (
>1.8 Khz or 500 Hz wide band.)
>When you do this, set your sampling rate of your read card section to 6000
>Hz or 8000 Hz., your output
>card is probably running at 48 kHz. sampling rate.
>
>If you see this put the cursor on the center of this peak or on the top.
>
>A vertical line should be visible over the peak. Having made this
>selection your
>audio. from the sound card should start if all is OK.
>
>Try a peak height of 10 scale Divs. above the noise , the base line.
>
>Look now at your filter display, middle of screen, in particular the left side
>of that display. You might see a red line or block. This is a slider. Turn up
>the slider with your cursor. On that side of the display should also be a
>little
>white block, Turn the slider so that the white block is in the middle of the
>display being moved by the audio. If you turn the slider too high , the
>spot will turn
>red , overload.
>If you see this white spot moving and the sound card is properly set, you
>should hear
>audio ( cw or a constant tone for a carrier ). In that same window you
>should see a red
>line straight or broken in 3 pieces. This is an oscillator ( BFO
>adjustment) Again move the bottom of the
>middle section of that red line and change the beat frequency of the
>incoming signal. like a normal bfo
>in a receiver ( boat ancker )
>
>Is easier to do this testing with a defined signal from your receiver
>than from a HF mixer/LO
>source at this point
>
>If you are lucky and 40 is open you might see other carriers or cw signals
>in the same display.
>side by side
>
>In this mode you have a spectrum analyzer , sweeping 3 or 4 KHz of audio
>
>In my first installation I had the white spot sittng at the bottom and no
>audio.!
>Even after many questions answerd here
>
>If you listen to noise, again you should see that block moving with the
>noise signal at the point of your cursor
>line in the spectrum
>
>I think even if you were to have a problem with the output of the sound
>card you should see the
>white dot moving. If you see the audio signal on the display you have your
>own tool to bootstrap
>to a operational system.
>
>If you know all this already, pse ignore this email. l
>
>73 Rein W6/PA0ZN
>
>
>
>
>
>
>
>
>Mike(W5UC) & Kathy(K5MWH) wrote:
>
>>At 12:40 AM 5/14/2005 +0200, you wrote:
>>
>>> > turned up in the Kmix pannel?
>>>Maybe. You might make a screen dump by pressing 'G'
>>>and send that to me off-list.
>>
>>
>>
>>I will run the experiments that you suggested. I went ahead and did the
>>screen dump. NOW, again I need help. I don't have the foggiest idea
>>where the screen went, or where to look for it. Once i find it, I need
>>to try to move it into this machine on the local network so I can send it
>>to you, If you, or anyone else has any idea where the pic went, please
>>let me know. Is it a .gif ? Meanwhile I will try to run the experiments
>>that you suggested.
>>
>>One other thing about the input to the Line-in port. I can see a change
>>in the level in the frame below the waterfall as I vary the input, so I
>>know there is something going into the software. I just can't see the
>>carrier on the waterfall?
>>
>>Do the numbers above the waterfall represent the audio bandwidth that the
>>software is seeing?
>>
>>73,
>>Mike
>>
>>
>>
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>
>
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