Electronics > Beginners
How to reprodoce dave's waveform
SteveRosenlund:
Hi there,
I cannot for the life of me figure out how to reproduce the wave form Dave uses on most of his scope reviews. I know it's a simple AM modulation signal, but how do i get that to come out of my Siglent SDG2042X AWG? Picture below.
Paul Rose:
Use MOD -> Type -> AM to select modulation
Set Frequency to your carrier frequency ( e.g. 1 MHz )
Set AM Freq to your modulation frequency ( e.g. 1kHz )
Set AM Depth to 100%
Set offset to 0
The "AM Frequency" (modulation) will define the "envelope" that you see on the scope display
The "Frequency" (carrier) will define the higher frequency that gets drawn as the "blurry" gradient on the scope.
Your horizontal time base on your scope should be set according to your modulation frequency, so you can see the envelope. The carrier frequency will be too high to see as a sine wave, it will be seen as the blurry gradient.
If you set the horizontal time base on the scope according to the carrier frequency, you will just see a regular sine wave. The modulation frequency is too low to be visible.
SteveRosenlund:
Hey thanks! I’ll try that out when I get home from this Halloween party that’s so fun I’m on my phone looking at forums. :)
alsetalokin4017:
I used HP8640B. Is that cheating? ^-^
Paul Rose:
--- Quote from: alsetalokin4017 on October 28, 2018, 04:31:46 am ---I used HP8640B. Is that cheating? ^-^
--- End quote ---
I have one of those, but I have to keep it on the floor. It is too heavy for my bench :)
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