[Elecraft] CW skimmer setup question

Martin dm4im at t-online.de
Mon Sep 2 10:25:17 EDT 2013


Mike,


 > 1. I have set hardware to softRock-IF (as per LP Pan site) is this
 > correct?

OK

 > 2. Sampling rate I am going to use is 96 and I did set the same on
 > the E MU 0202

OK, but 192khz also should work.

 > 3. Pitch is set to 600 as is the K3

OK

 > 4. The Audio IF I am not sure what to set that too as I am not
 > running any SDR software. The only answer I could find for the
 > setting of the was to set the Audio IF at -6000 and take away the
 > global offset from your SDR software. I am not using SDR software so 
 > is it left at -6000?

OK



 > The Audio tab is set as follows.........
 > 1. Sound-card driver is set to MME

OK

 > 2. Signal and Audio devices are set to my E MU 0202 cards

OK

 > 3. Channels was left at Left/Right= I/Q

Depends on cabling and band . On 6m, I/Q must be swapped.
Run a different copy for 6m with I/Q swapped.

I set up my cables to match the cabling of PowerSDR. PowerSDR 
compensates the SWAP of IF frequency above 30Mhz automatically.

So, for shortwave:

SoftRock-IF, Audio IF= -6000, I/Q Left/Right

Tune in a constant signal on your K3 . With the the above settings, the 
signal ( a continous dash on the screen) should be very close to the 
little green arrow. If it is a bit off, correct AUDIO IF up or down in 
small steps. If it is far off, you probably have the cables interchanged.

Finally, if you tune your K3 e.g. lower in frequency, the dash on the 
screen should move up (= stay on its frequency) while the green arrow 
should move down (= indicate the new lower K3 frequency) and vice versa. 
If not, flip cables. Allow a moment for the screen to update.

With this cabling, PowerSDR should run 'out of the box'.

For 6m, use the same cabling/settings. Just flip I and Q or run a 
differnt copy with I/Q flipped.


 > 4. Shift Right channel data was left at 0 samples

Probably OK

-- 

Ohne CW ist es nur CB..

73, Martin DM4iM


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