With Spooky Central we can use a variable carrier that just hits a harmonic of the base frequency directly. I'm wondering how best to generate additional sidebands containing frequency harmonics that have the potential to increase the treatment power.

I posted earlier in another thread on the dynamics, but here's the end result of your change in regards to the sidebands generated. This does not change the fact that since we are using square waves that additional odd harmonics are being generated as well.

Original: 100,000 Hz input, 90,000 Hz Modulation
Result: First lower sideband = 10,000 Hz, First upper sideband = 190,000 Hz. Second upper sideband = 280,000 Hz, and so on.

Proposed Change: 100,000 Hz Input, 10,000 Hz Modulation

You have now changed the modulation from 90 kHz to 10 kHz, so the sidebands will be spaced accordingly -- every 10 kHz.

Lower Sidebands: 90 kHz, 80 kHz, 70 kHz, 60 kHz, 50, 40, 30, 20, 10. As you can see, the original frequency 10 kHz is now the 9th sideband and consequently will have less power than when you created it as the first lower sideband.

The Upper Sidebands will follow suit. 110 kHz, 120 kHz, 130, 140, 150, 160, 170, 180, etc...

Here's the link where I go into more detail:
http://www.spooky2.com/forums/viewtopic.php?f=74&t=4762&hilit=sideband&start=15#p43415

Since the SC operates using square waves which either is on (full amplitude) or off (no amplitude), and the modulation port affecting whether the tube is on or off as well, this is in essence amplitude modulation of a square wave.

Granted it does not look the same as when you use a sine wave and perform amplitude modulation on it giving you a nice sine wave with sine waves embedded. However, for all intents this is still amplitude modulation of the square wave. You will get multiple square waves embedded in a square wave.

The effect is the same as if you were to use Modulate F2 using F1 (AM DSB) on a square wave. The input or carrier frequency of the SC (which can by dynamic instead of being fixed) on Out 1 is the equivalent of F2, and the modulation frequency of the SC is the equivalent of F1.

The result is the input frequency becomes the center frequency and multiple side bands are generated spaced at the modulation frequency width. This is no different than using a fixed carrier of 3.3 MHz and using a low audio frequency to modulate it.

The problem is that if you are going to use say 8020 Hz (B or E Coli Rod) and do not use a 3.3 MHz carrier, you will get different sideband frequencies and you won't hit the intended target. This is what happened to those who used a machine with say a 3.8 MHz fixed carrier wave.

With Spooky SC, you can replicate what they did provided that the information you have is accurate and there were not additional factors that resulted in the frequency that did the work. Set the input (Out 1) frequency to the carrier of the device in question and set the modulation (Out 2) to the frequency that was used as the original input frequency to the device with a fixed carrier wave.

Granted because we are using square waves, there will also be additional harmonics produced in addition to the sidebands.

Of note, when you use two frequencies on Out 1 and Out 2 via a remote or contact, you are just getting frequency addition. If the two waveforms are different, they are still just added together. You will see a square wave embedded in a sine wave for instance.

To replicate the side bands via remote or contact you will need to use the Modulate F2 using F1 feature and set the frequency to the modulation value, and then calculate the value of X to replicate the static carrier. This only works for one frequency at a time given the nature of F2 being a multiple of F1.

For more details, please check the link:
http://www.spooky2.com/forums/viewtopic.php?f=12&t=5152

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