The Instantaneous Teleportation Cosmos (ITC) theory interprets quantum entanglement as a dual-port projection of the same basal information cluster and predicts that manipulating the quantum state at the sender side can induce a tiny shift ΔP≠0 in the single-party probability distribution at the receiver side. Theoretical analysis, based on the four core properties of the ITC framework (P1-P4), estimates ΔP to be in the range of 1.6%–2.4% (depending on the modulation efficiency factor). The introduction of Basal Resonance Tunability (P5) provides a key mechanism to further enhance this signal: when an external field frequency matches a basal eigenfrequency, the parameters of P4 (such as the manifestation time τ) are locally modulated. Specifically, exciting the τ-mode compresses τ, which reduces the quantum fluctuation noise that obscures single-shot results. This increases the signal-to-noise ratio of the perturbation at the receiver’s projection, making ΔP significantly more detectable. This paper systematically elaborates the synergistic physical mechanism of P5 and the π-pulse—where the π-pulse acts as the signal source by altering the information cluster content, and P5 acts as a signal amplifier by modulating the parameters of P4 (e.g., the manifestation time τ)—enabling ΔP to reach a precisely measurable level (experimental target of 2.5%). This mechanism offers a practical path for testing ITC theory, revealing the basal structure, and exploring the principles of superluminal communication.