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- Опубликовано: 20 окт 2024
- PLEASE NOTE that I accidentally repeated a small section of the video from about 4:50 to about 6:30. Just skip over this and sorry for the mistake!
To download files from video:
www.dropbox.co...
Video #69: Plotting Revisited and Some SimSmith History • #69: Plotting Revisite...
Video #88: Stale Data • #88: Stale Data in Sim...
Video #97: Z vs Zin vs invZ vs revZ Functions • #97: Z vs Zin vs invZ ...
www.w0qe.com
This really is a fantastic piece of software, thanks guys.
Larry mentions that if you select something to be plotted in a RUSE block (around 3:40) you don't get any errors when you remove the RUSE block. True enough. You can also do plotting in the text section of the block, just as you can in the G.PLt dialog. This has the same advantage.... the plotting commands go along with the RUSE circuitry. Additionally, if you duplicate the RUSE block you can have the Plot commands duplicated as well.
The 'general case' of plotting is 'Plot()'. Other things like 'Smith' or 'SWR' or 'Power' are conveniences. RMS and Peak are provided to deal with harmonics... something few people explore.
Larry mentions that when placing a marker on the Square or Smith chart you can only place the marker at a computation point. True enough. However, once placed, you can change the values of the parameters to plot specific points independent of the 'computed' values. Internally, SimSmith does an explicit evaluation of the circuit after setting the parameter values. Warning: this can result in the marker pointing to a place not on the line!
I have shown this in previous videos but forgot to mention it in this video.
Larry, W0QE
When plotting 'Waves', the phase of the voltage coming out of the generation is not always 0. In Larry's example, the voltage is 'absV' and that DOES always have zero phase because the generator's internal impedance is 0. However, if the generator has an internal impedance (say 'useZo') and the load is not resistive, the phase will NOT NECESSARILY be zero.
The absV generator is my generator of choice when I use SimSmith like an oscilloscope plotting waveforms for this reason. I think the Wave function can really help to understand how a circuit works.
Larry, W0QE