I have recently become involved in an ULF (Ultra Low Frequency 1Hz to 10Hz) radio project, and would like to work on some passive and active filters for same.
Would it be possible to modify the bode plotter so that it could plot a range of say 100mHz to 100Hz?
Thank you!
I guess not–that’s cool though, still a great system…
Sorry Cliff for my late reply.
It seems that I missed your first post.
[quote]Would it be possible to modify the bode plotter so that it could plot a range of say 100mHz to 100Hz?[/quote]I’m sure this is possible!
You’ll get a sample for testing in a couple of days…
[quote=“VEL255”]Sorry Cliff for my late reply.
It seems that I missed your first post.
[quote]Would it be possible to modify the bode plotter so that it could plot a range of say 100mHz to 100Hz?[/quote]I’m sure this is possible!
You’ll get a sample for testing in a couple of days…[/quote]
You never cease to amaze me–that would be great!
Now the updated software is available.
As an extra there is now 1s/div time range added to the oscilloscope. To the spectrum analyzer there is added 0-60Hz range.
The Bode Plot is now possible from 0.1Hz.
Here is a link to the installation program: velleman.eu/downloads/files/ … _v4_03.zip
Please note:
If you are using Windows Vista, there is strange behavior in it: Vista stores the pcsu1000.bit file (and pcgu1000.bit) to the folder: C:\Users<UserName>\AppData\Local\VirtualStore\Program Files\Velleman\PcLab2000SE
I noted that when the oscilloscope software is run for the first time after a clean install, the .BIT file is copied to the “Virtual Store” folder. Next time (and forever) the software uses this copy of the .BIT file. Even after the new software version is installed. The copy of the old .BIT file is used from the “Virtual Store” folder.
The pcsu1000.bit is important (FPGA) file containing the “hardware” of the oscilloscope.
Uninstalling the earlier version of the PcLab2000SE does not remove the old file from the “Virtual Store” folder.
You have to go to the folder and manually delete the pcsu1000.bit (and pcgu1000.bit) file from the “virtual store” before or after the new software installation.
The Bode Plot is very slow at 0.1Hz. You have to wait about 30 seconds for the first data points to be plotted. The plot speed starts to increase at 0.2Hz.
[quote=“VEL255”]Now the updated software is available.
As an extra there is now 1s/div time range added to the oscilloscope. To the spectrum analyzer there is added 0-60Hz range.
The Bode Plot is now possible from 0.1Hz.
Here is a link to the installation program: box.net/shared/q4a7gnd8p9
Please note:
If you are using Windows Vista, there is strange behavior in it: Vista stores the pcsu1000.bit file (and pcgu1000.bit) to the folder: C:\Users<UserName>\AppData\Local\VirtualStore\Program Files\Velleman\PcLab2000SE
I noted that when the oscilloscope software is run for the first time after a clean install, the .BIT file is copied to the “Virtual Store” folder. Next time (and forever) the software uses this copy of the .BIT file. Even after the new software version is installed. The copy of the old .BIT file is used from the “Virtual Store” folder.
The pcsu1000.bit is important (FPGA) file containing the “hardware” of the oscilloscope.
Uninstalling the earlier version of the PcLab2000SE does not remove the old file from the “Virtual Store” folder.
You have to go to the folder and manually delete the pcsu1000.bit (and pcgu1000.bit) file from the “virtual store” before or after the new software installation.
In Windows 7 there is no similar behavior.
The Bode Plot is very slow at 0.1Hz. You have to wait about 30 seconds for the first data points to be plotted. The plot speed starts to increase at 0.2Hz.[/quote]
Once again I am in awe, and in your debt!
I suspected it would be slow–something I have come to grips with on this project using some other tools with sweeps down to 5ks/div–yup. 13.88hrs/sweep!
I do not run Vista (or “7”), and suspect I never will as I have been working with Linux and Solaris; I suspect my next BOG move will be in that direction–are Velleman looking in that direction at all for the future of PCLab?
Once again thank you for your fine work–I will report back later tonight or tomorrow…
-cliff-
As a test I run a Bode Plot for this simple band-pass filter:
The PCSU1000 / PCGU1000 Bode Plotter result looks like this:
The option “Normalize Output by Input” was on.
Here a reference run with and without the option “Normalize Output by Input”:
BTW: It seems that the filter Bode Plot result corresponds very well to this Micro-Cap simulator plot:
"As an extra there is now 1s/div time range added to the oscilloscope. To the spectrum analyzer there is added 0-60Hz range. The Bode Plot is now possible from 0.1Hz.
Here is a link to the installation program: box.net/shared/q4a7gnd8p9
"
Unfortunately this link has expired.
I don’t see these options in 1.09, so what is this version called?
Could you put it on the velleman downloads page as ‘experimental software’ no support, to make it easier for people to access?
In rereading the thread I see that this is for a pcgu1000. Any chance we can get the same functionality added to the pcsu250?
[quote]Any chance we can get the same functionality added to the pcsu250?[/quote]I’m sorry, but this modification need addition to the FPGA code. There is no space available in the FPGA of the PCSGU250 any more.