Muttley600
New Member
Here's an example that should help demonstrate the "scope" method of frequency determination:
What other method is there beside the multimeter **broken link removed**
OK. We're going to investigate frequency issues for a bit.
**broken link removed** Not that I'm excited or anything you understand **broken link removed**
As to your question, I isolate one, single wave of the sine wave
I've been trying to do that, all I can say is well done **broken link removed** maybe its easier if you export it into a graph **broken link removed**
count the graticules on the scope (10 in this case), multiply the sweep speed (100usec) time by the graticule count (10) to derive a "wave length" of 1 millisecond.
yes, thats a lot easier if you change the scale on graph, how do you know the speed sweep
Edit: ok, gravelrash, sorry graticule, is this the complete box in Volts/div or each segment
Then divide 1 (one) by that number (1 millisecond, as a decimal [0.001]), and get the answer of 1000 Hz, or 1kHz.
seems to make sense, can you sense my hesitation here
For any wave length other than one landing exactly on graticule lines on the scope face is, at best, an approximation.
ok, wavelength, UHF/VHF/AM/FM I take it these are all simply different frequencys known as bands then having secondary frquency in this like you showed me before, but your not talking about that kind of wavelength here are you, you are simply relating to one sinewave
The beauty of an FG is that we can tell it to produce not just one frequency, but cause it to "sweep" across a range of frequencies over a period of time. That is, generate a signal, of a constant amplitude, that, say, starts at 100Hz and increases to, say 10kHz, and then goes back to 100Hz, etc..
That is so cool, shows the spring coil opening & closing perfectly, or is that meant to be....... wow, thats showing me the frequency perfectly
**broken link removed****broken link removed** just don't start me on jam cakes **broken link removed**
Now we'll further adjust the FG: (set "Time" to 5s and "Num" to 20). press the "Sweep" button.
I did that ok, but was struggling to relate to what I was actually changing compared to normal **broken link removed**
Now bring up your scope and observe how the sweeped sine wave appears.Pretty cool. huh?!?
The only thing I can relate this to is walking up a large hill, seeing the crest, getting there to see another one, but then turning around & admiring the view anyway & it's looking ace already, I'm looking forward to climbing higher **broken link removed**
I've never enjoyed learning so much in my whole life
In a bit, I'll post circuits and a lay out on how to use the Signal Analyzer (SG). We will not need the FG for this since the SG has a built-it FG.
Looking forward to moving on, did I mention I was enjoying this
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