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Siglent SDG1000 (aka LeCroy WaveStation) firmware updates

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nixxon:
Thanks. That made a difference:

A   B   C
fstart   1   Hz
ffinal   1000   Hz
S   2   seconds
c   1,5   
      
      
      
      
t (seconds)   f(t)   
0   1   <-----------column B now reads this: =$B$14*10^(A23*$B$17)
0,1   1,412537545   
0,2   1,995262315   
0,3   2,818382931   
0,4   3,981071706   
0,5   5,623413252   
0,6   7,943282347   
0,7   11,22018454   
0,8   15,84893192   
0,9   22,38721139   
1   31,6227766   
1,1   44,66835922   
1,2   63,09573445   
1,3   89,12509381   
1,4   125,8925412   
1,5   177,827941   
1,6   251,1886432   
1,7   354,8133892   
1,8   501,1872336   
1,9   707,9457844   
2   1000   

commongrounder:
Yup. That is the kind of envelope I expect from the "log" sweep of a function generator.  Let's hope that Siglent can incorporate that into the generator firmware, or better yet, let us create sweep envelopes ourselves, just like any other arbitrary waveform.  By the way, I did try using the frequency modulation function, but the frequency range (equivalent to start and stop frequencies) is too narrow.

nixxon:

--- Quote from: Fennec on May 01, 2013, 06:54:49 pm ---Hi,

I am not the expert in Excel, so please can you attach the file here ? Thank you.

--- End quote ---

Here you go. It's just a crude excel workbook.

MasterOfNone:
You can create your own custom sweep curves using FM as follows:
1: Draw the sweep curve using the Easydraw app (Equation, Line or hand draw etc).
2: Download the curve to the SDG.
3: On the SDG select the “Arb” function and then load the Stored Waveform.
4: Next select the type of wave you want to sweep (Square, Sine etc)
5: Set the frequency of the wave to the midpoint of your sweep range, so if you want to sweep from 0Hz to 20KHz you would set 10KHz.
5: Set the amplitude etc.
6: Press the Mod button and select "Type" to "FM".
7: Set the “FM Freq” to the sweep duration. Freq = 1/t ,  so for a 10 second sweep set “FM Freq” to 100mHz.
8: Set the ‘FM Dev’ to Half your sweep range ( so for a 0Hz to 20KHz sweep set 10KHz again).
9: Set the “Shape” to Arb.
10: Enable the output.

Note: It should be possible import sweep curves from Excel or other apps as CSV files into Easywave and then download them to the SDG, you will probably need to add the header information which you can see by looking a saved wave. But I haven’t tried this.

nixxon:
I added the sine curve data as well, simply by adding a sine function in the excel file. I threw in Vpp and DC offset as well. Enclosed is the new excel-file for anyone to have fun with. Even if you know very little about excel, it is OK to change the values in the green cells.

The graph below shows a 2 second log sweep from 1 to 100 Hz with 2Vpp and 1V offset. It is based on a table with 1 mS increments. (2000 values).

It should be easy to export the 2 relevant columns (A (timecode) & C (Voltage level)) as a csv file (with correct headings etc.) and then import this csv-file into the AWG.

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