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DAS Signal Chain Simulator

Trace the signal level at every node of a BDA-based DAS — from donor antenna through cable, BDA, splitter, distribution cable, and indoor antenna. NFPA 1221 / IFC 510 compliance verdict at each end point.

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NFPA 1221 / IFC 510 — PASS

Indoor antenna EIRP: -17.9 dBm (minimum required: −95 dBm outbound)

Donor Side

Donor RSSI-75 dBm

Donor Cable Type

Donor Cable Length50 ft

Connector Loss0.5 dB

BDA

BDA Gain65 dB

BDA Max Output24 dBm

Distribution Side

Splitter / Ports

Distribution Cable Type

Distribution Cable Length75 ft

Indoor Antenna Gain3 dBi

Signal Level at Each Node

Donor Antenna (RSSI)

-75.0

dBm

PASS

Donor Cable (50ft LMR-400)

-1.9 dB

-76.8

dBm

BDA Input

-76.8

dBm

BDA Output (65 dB gain, max 24 dBm)

+65.0 dB

-11.8

dBm

4-Way Splitter (−7.0 dB)

-7.0 dB

-18.8

dBm

Dist. Cable (75ft LMR-400)

-2.0 dB

-20.9

dBm

Indoor Antenna Port (TX)

-20.9

dBm

EIRP (Antenna +3 dBi gain)

+3.0 dB

-17.9

dBm

PASS

NFPA 1221 / IFC 510: Minimum inbound and outbound RSSI at indoor antenna locations is −95 dBm. BDA gain is automatically limited to BDA max output power. Add 10 dB fade margin for reliable coverage in marginal RF environments.