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Design Rules for ∆f, AM Depth, FM Deviation, and Q: A Practitioner’s Map

RF integrators need actionable envelopes—“green
zones” and “red lines”—for configuration choices that balance
robustness, latency, and false-alarm cost. Building on probabilistic agentic sweeps [1], ghost-mode cost analysis [2], and
scheduling for drift-free throughput [3], we derive practitioner
design rules over four core axes: carrier frequency offset (∆f),
AM depth, FM deviation, and resonator quality factor (Q).
We produce traffic-light matrices per pairwise slice and extract
lookup tables from robustness/ghost contours, yielding simple,
auditable thresholds suitable for field guides and acceptance
test plans. Results demonstrate clear operational boundaries:
maintaining |∆f| ≤ 1.2 kHz·(200/Q) for SNR 8-12 dB, keeping
AM depth ≤ 0.5 unless FM deviation ≤ 1.0 kHz, and requiring
Q ≥ 200 for FM deviations above 1.8 kHz to remain in green
zones.

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