Castle Fulcrum – Final Calibration Metrics

Baseline snapshot for ongoing monitoring and packet generation.

Section A – RF Calibration Summary

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Array	RF (dBm)	SNR (dB)	Status
2	-53.0	22.6	OK
3	-60.1	24.9	OK
4	-53.1	23.1	OK
5	-64.1	19.2	OK
6	-65.1	15.7	MARGINAL
0	-63.7	24.7	OK

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Device	IMEI	BLE	Dist (km)	RSSI (dBm)
CASTLE	948229	9E:9E:19	0.000	-71.3
Device 1	111111	AA:BB:CC:DD:EE:01	1.2	-65.0
Device 2	222222	AA:BB:CC:DD:EE:02	2.4	-78.0
Device 3	333333	AA:BB:CC:DD:EE:03	3.1	-82.0

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Array 6 flagged as marginal due to low RF and borderline SNR. Check antenna orientation, cable loss, and local interference.
Device 3 has weak RSSI despite moderate proximity. Check device antenna, shielding, or terrain obstruction.
Device 2 shows borderline RSSI. Monitor for drift.

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Resonance: 902.3 MHz
Target:    915 MHz
SWR:       1.3

Interpretation:
Antenna slightly too long.
Recommend trimming ~3 mm for optimal match.