Loss of wave line in panadapter
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Loss of wave line in panadapter Expand / Collapse
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Posted Monday, November 6, 2006 9:36 AM
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I recalibrated onto a AM station in setup which appeared to go all right however, when I went onto main screen and selected 40 LSB I can only just see the peaks of the signals with the rest of what I should be able to see down off the bottom of the screen.Can any one tell me what going on. This happens on all bands but AM

Thanks. Dave

Post #51
Posted Monday, November 6, 2006 2:24 PM
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I assume your referring to the level calibration - as I have had similar experience using the program with a softrock 40m SDR.

I have not been able to quite figure the level calibration settings. I can 'record' a loud station or use a cw tone from my Icom IC7000 and then calibrate against the signal.

The end result is the signal either is too high or too low and the preamp settings - off, low, med or high don't appear to make any difference.

Any suggestions by more experienced users would be welcomed...

Post #52
Posted Monday, November 6, 2006 5:40 PM
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Hi Mark

I am not sure that we are talking about the same thing so let me be more precise.

I calibrated using a AM station and the signal was clear on the screen with a high peak but when I moved onto Band 40 LSB and used the panadapter all that I can see when I drag the screen to change the frequency is the top peak of the signal and I am unable not see the bottom half. Subsequently when I drag across to change the frequencies, unless there is a station coming through on a high strength then I can not see it.

I hope this explains my problem better

Dave

Post #54
Posted Monday, November 6, 2006 7:01 PM
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Dave, I think you are right - we are speaking about separate issues (assuming makes a *** out of you and me - me I think in this case....)

My query relates to the general level test. Maybe someone can help.

regards Mark

Post #55
Posted Tuesday, November 7, 2006 9:39 AM
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Hi Mark

I am not sure what *** means. Has it something to do with the way SDR is set up?

Take care and thanks for trying

Dave

Post #56
Posted Wednesday, November 8, 2006 11:01 AM


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There is an offensive word filter used on the KB.  The "***" was put in place of the offensive word.

-----
Tim - W4TME
Post #57
Posted Wednesday, November 8, 2006 11:25 AM
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The level calibration should allow either a softrock or an SDR-1000 to calibrate properly.  The important thing is to have a known reference to use.  Alternatively, you can try to put the noise floor somewhere around -130dBm by experimenting with the calibration numbers.  Note that you will need a steady carrier without fading for a proper calibration.
Post #58
Posted Wednesday, November 8, 2006 1:12 PM
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Sorry chaps didn't mean to offend anyone.

What I quoted was a play on words to 'assume'  = to make a 'rear' out of 'u' and 'me', its an old quote but sometimes correct as noted in my incorrect assumption.

Changing the subject, I picked up a SDR-1000 100watt radio today and am busy playing!

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