Can it be simply some amplitude vs RMS value ? The amplitude and RMS for sine wave are different by factor of 2.

Thanks, that's a good one, I hadn't thought of that yet. I don't think that this is the cause here though, because both solutions are in the frequency/Fourier/Laplace domain, and moreover, the transmission results do not show this difference.

Sita Drost First, let me reassure you that such discrepancies are not uncommon in scientific research, and they often lead to valuable insights.

Now, let's break it down in simple terms:

Here's where the difference might be coming from:

• It's possible that your direct solution is accounting for certain terms twice, leading to the factor of 2 difference. Double-check your equations and ensure that you're not inadvertently duplicating any terms during the calculation.
• Additionally, Mason's model might have assumptions or simplifications that differ from your direct approach. These differences can affect the final results.
• Collaborate closely with your experienced colleague and carefully compare the two methods step by step. Discuss the assumptions, boundary conditions, and any simplifications made in both approaches. This collaborative effort can help pinpoint the source of the discrepancy.

Remember, in scientific research, discrepancies often lead to new discoveries and a deeper understanding of the problem. Keep your discussions respectful and open, as this collaborative approach will likely lead to a solution.

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Qamar Ul Islam thanks for contributing. Unfortunately, I already did all that before posting here. Mason's equivalent circuit is, well... equivalent to the direct approach (I checked its derivation), so yes, a mistake in my equations might be the source of this discrepancy, but our careful step-by-step comparisons haven't revealed that yet.

Sita Drost , I appreciate your thorough approach. In science, the journey towards understanding is often as valuable as the destination. Since both methods theoretically align, and your detailed comparison hasn't resolved the discrepancy, consider these additional aspects:

Remember, resolving such complex discrepancies is a testament to the rigor and diligence required in scientific inquiry. Your persistence and collaboration are key in unraveling these mysteries. Keep questioning, exploring, and sharing – that's the essence of our scientific journey.

Thanks again Qamar Ul Islam Just out of curiosity: are you using ChatGPT to generate these answers?