What’s the calculation of Spectrum Sweep?

1. Centre frequency = (High Frequency - Low frequency)/2 + Low Frequency
Centre frequency = (880000 - 76000)/2 + 76000= 478000Hz

Frequency spacing = Centre Frequency x MOR tolerance
478000 x 0.00025 = 119.5Hz
Which agrees with your calculation.
When I put those values into Spectrum Sweep calculator and save that program, the section highlighted doesn't change.

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2. Just for your info :

+ / - 119.5 Hz is MOR tolerance range (0.025 %) . It's not Frequency spacing which Spectrum will produce ( 4187.5 Hz ) .

MOR tolerance range ( 477,880.5 to 478,119.5 Hz ) shows range of frequencies that will be effective in destroying / disabling a pathogen ( according to Dr. R. Rife ) . Each frequency produced by the Spectrum Sweep will be effective in this range ( freq + / - 119.5 Hz ) .

To increase effectiveness you may increase " Frequency Hits Per Sweep " from 1 to e.g. 2 or 4 . This will also increase total running time .

You may adjust value for " Wave Cycle Multiplier " to get different Frequency Spacing . This will also affect Spectrum Amplitude .

3. Many people make this mistake. The spectrum waveform contains both positive and negative asymptotes, each with differing spectral contents. It is not an evenly-repeating waveform, where the negative asymptotes can be ignored. You can only do that if they are phase-angle related to the positive asymptotes. The frequency spacing is therefore (spectrum high frequency - spectrum low frequency) / (2 * WCM). This can be confirmed using a spectrum analyzer.

With a low-frequency of 76000, high-frequency of 880000 and WCM of 32, 64 frequency spikes will be observed in a spectrum analyzer; 32 above and 32 below fundamental / 32.

The spacing between each frequency spike is (880000 - 76000) / 64
= 804000 / 64
= 12562.5 Hz

SweepStartFreq = CentreFreq - (0.5 * HitsPerSweep * FreqSpacing) - (CentreFreq * FreqTolerance / 100)
SweepStopFreq = CentreFreq + (0.5 * HitsPerSweep * FreqSpacing) + (CentreFreq * FreqTolerance / 100)

A retentive spectral-analysis of an entire sweep will confirm an almost-even blanket coverage of the desired target frequencies using these values.

For more details, please check the link:
https://www.spooky2.com/forums/viewtopic.php?f=5&t=11921

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