[linrad] 96000 Hz pulse noise files for Linrad and Winrad

[w3sz <comcast.net; w3sz@xxxxxxxxxxxxxxxx>]

Hello, All

I made some 96000 Hz wave files Sunday.  Sunday I had a loud [S9] pulse  
noise centered at 119 degrees, which is in the exact direction of the  
W3CCX beacon, which is what I use as my 'strong signal' for testing.

The files were made using the WSE [Linrad] hardware feeding a Delta44 and  
running Cool96 at 96000 Hz sampling rate to record.

I put a zip file on the web named w3sznoise-3-12-06.zip that contains a  
couple of the files that were created, along with some support files.  You  
can download this by clicking on that filename from:
http://home.comcast.net/~w3sz/index.html
or by going to http://www.nitehawk.com/w3sz/w3sznoise-3-12-06.zip
directly.

I have downloaded and tested the zip file to make sure that the downloaded  
files are not corrupted.

First I will list the files in that zip file and then give more  
explanation.

adwave

dsp_ssb_corr
dsp_ssb_iqcorr
dsp_wcw_corr
dsp_wcw_iqcorr

ft1000w3ccxandnoise50-3-11-a-nbandnar2and240apf.wav

w3ccxandnoise144-3-11a.wav

w3ccxandnoise50-3-11a.wav

-------------------------

Here is what they are:

adwave just my adwave file for linrad for windows, listed to give an  
example only.  You need to create an adwave file with the complete paths  
of the wave files you wish to listen to using Linrad, and place the adwave  
file in the Linrad directory.  This is a text file, but just named  
'adwave', not 'adwave.txt'.

dsp_ssb_corr
dsp_ssb_iqcorr
dsp_wcw_corr
dsp_wcw_iqcorr
These are my calibration files for the single channel mode of Linrad,  
running at 96000 Hz sampling rate, 16 bits, in I/Q mode.  You need to put  
them in the Linrad directory to get the full advantage of Linrad's 'smart'  
noise blanker.  And of course you need to set Linrad up in this mode to  
run these files. [This is done by selecting 'U' to set up the A/D and D/A  
parameters].

PS You want to answer 'yes' to linrad's 3 'Y/N' questions after you type 4  
to do adwave files and select the mode [I suggest 'D SSB' to play around  
and see what the noise blankers to;  I would use SSB mode for both Linrad  
and Winrad to appreciate the full effect of the noiseblankers in each  
program].

ft1000w3ccxandnoise50-3-11-a-nbandnar2and240apf.wav  This is the audio  
output from my FT1000 MP using its noise blanker and DSP 240 Hz CW filter,  
with it getting the same RF signal that the WSE Linrad hardware got to  
generate the 50-3-11a file.  So you can compare the output of your 'best  
shot' with Linrad and Winrad to what the old technology does by comparing  
this audio to what you get when you run w3ccxandnoise50-3-11a.wav thru  
Linrad or Winrad.  THIS IS NOT A FILE TO BE PLAYED BACK THRU LINRAD OR  
WINRAD.

w3ccxandnoise144-3-11a.wav  This is a 96000 Hz sampling rate wave file  
made with the array at 119 degrees, receiving on 144 MHz with the WSE  
receiver centered at 144.250 MHz.  W3CCX is at about 144.283 and there is  
another beacon from New York City that is weaker and centered about 5.3  
KHz above W3CCX.

w3ccxandnoise50-3-11a.wav  This is a 96000 Hz sampling rate wave file made  
with the array at 119 degrees, pointing right at W3CCX and the noise  
source.  The receiver is centered on 50.050 MHz.  The beacon is at 50.079  
or thereabouts.  There is a weaker beacon, W3DOG/B, in FM28ei that is at  
50.071 MHz.  So this recording has a strong signal [W3CCX], a weaker  
signal [W3DOG/B], and pulse noise.

These files are not interesting in terms of the signals [CW beacons] but  
the combination of strong and weaker signals with pulse noise allows one  
to really test the noise blankers and I think the results of that are  
interesting.  Again, for demonstration purposes, I recommend that you do  
your testing in SSB mode.  Make sure you have the calibration files in  
your Linrad directory.  If you get a Linrad message about things not being  
calibrated across the screen when you go to receive, then the calibration  
files are not being used and you will not be able to use Linrad's smart  
blanker and will not see Linrad's full performance.

73,

Roger
W3SZ


--
Roger Rehr
W3SZ
http://www.nitehawk.com/w3sz/

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