Would it possible for you to make this extended frequency range (eventually up to 10MHz) awailable for the bode-plot for the combination PCS500 / PCGU1000 combination - I would be so happy !!
Actually I just bought the PCGU1000 today for doing this pode-plot - as I thought your changes to the software mentioned above would work on my PCS500/PCGU1000 combination
The software version installation I have is
âPcLab2000SE_v4_04_setup.exeâ
Thanks in advance
Reneâ
PS: A question: I tried the âsine4fâ waveform and it seem to work fine - why not extend the generator frequency range all the way up to the 8MHz?
Thank you for the suggestion.
The combination PCS500/PCGU1000 will be also soon modified for the Bode plot up to 5MHz.
The 10MHz is not acceptable for the Bode plot option because of the signal attenuation of about 0.5dB.
At 5MHz the attenuation is about 0.2dB.
[quote]A question: I tried the âsine4fâ waveform and it seem to work fine - why not extend the generator frequency range all the way up to the 8MHz?[/quote]You can output frequencies above 2MHz by using the sweep option.
Set equal Start and Stop frequencies and click the Start Sweep button
Do you have a web-address where the user always can get the newest version? -could be a good idea:-)
By the way: What is the difference between the PC-Lab2000SE and the PC-Lab2000LT ?
I know it has been mentioned before - I also believe that the Velleman company could benefit from releasing the source-code as Open Source - the customers could modify and expand the functionality of the software for their needs and share their new functions with you and others - I really think you could sell quite some more hardware in this way.
just a suggestion (from a scientist)
Velleman is a company for the electronics hobbyist /professional - isnât it
[quote]Where can I get the modified version?[/quote]Iâll inform you in this thread the link where you can download the pre-release version of the PcLab2000SE when the modification is done
[quote]Do you have a web-address where the user always can get the newest version? -could be a good idea:-)[/quote]Yes, the last âofficialâ release can be downloaded from this page: velleman.eu/support/download ⌠1000&type=
[quote]By the way: What is the difference between the PC-Lab2000SE and the PC-Lab2000LT ?[/quote]PcLab2000LT is for the oscilloscope/function generator PCSGU250: velleman.eu/products/view/?id=377622
[quote]Hope you donât spend your weekends on this âŚ?[/quote]It was no problem to make the software modification.
If everything OK, this modification will be in the next âofficialâ release of the PcLab2000SE.
It is possible to choose between âlinear frequency stepâ or âlog frequency stepâ however:
a) âlinear frequency stepâ - takes a wery long time to do a fequency sweep - especially when going from 100Hz to 5MHz
b) âlog frequency stepâ - makes a wery coase frequency plot - especially at high frequencies.
Would it be possible to make something in between = the possibility to chooe a equal number of frequency steps per division and a field to key in the desired number of frequency steps per division in the scan ?
Another one:
The function generator: when changing the frequency of the generator (0-2MHz): Would it be possible to choose which digit to modify by the mouse scrool wheel (just like it is working on the proffesional frequency generators) - could be a good function when looking for resonances.
Indeed, using the linear frequency step is not very convenient if the frequency span is very large.
I think better to use the logarithmic step and use low the frequency step size on the frequency range of interest. Just press the Pause button and change the frequency step size (in Options menu).
Then click the Pause button again to continue the plot.
You can also use the Options menu option âShow Multiple Tracesâ to run different decades with different linear step size.
The only problem that when looking the complete plot you get different colors for different decades.
Now there is this âmore professionalâ octave step mode added to the Bode Plotter of the PCSGU250.
There are following settings available 1/3, 1/6, 1/12, 1/24 and 1/48 octave.
It is possible change the frequency step by selecting the Options menu item Frequency Step Size.
The octave step setting is remembered to the next session.[/quote]
For the peoble working with audio and hearing etc. I think the octave steps sugested would be a wery usefuld feature.
I my case, I need to do a linear frequency sweep from 0 to 5MHz in 64, 128, 256, 512, 1024, 2048, 4096, 163842 or 32768 steps (the larst ones may too long time)
In physics, linear frequency sweeps is mostly used.
Have now done a measurement overnight:
Tried to do a sweep from 100Hz to 5MHz in 14400 datapoints -> stepsize = 347.2%
Next morning the generator has stopped at 5MHz (4995kHz) but the plot and the datafile has stopped already at 473.334kHz.
The computer is running Windows 98
I wonder if this could be due to the (known) limitation of the text-editor carried with Windows - which in Win98 has the limitation that the file/text size must be kept below 64kB (klio-byte)
When I save the data, the resulting datafile becomes 36.4kB (carries 1339 datapopints)
[quote]I wonder if this could be due to the (known) limitation of the text-editor carried with Windows - which in Win98 has the limitation that the file/text size must be kept below 64kB (klio-byte)[/quote]Yes, this limitation seems to be Windows 98 related. The âworkaroundâ is to use Windows 2000 or newer operating system.
It is the buildt-in editor I am thinking on - where the software writes the measured data (lower right corner) - this editor is (especially when using the Delphi âeditâ - visual component) actually an editor carried by the windows system.
with the 64kB limitation
however - the resulting datafile actually becomes only 36kB (which is not an âfullâ editor).
