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Date Code 20210405
Instruction Manual
SEL-FT50/SEL-FR12 Fault Transmitter and Receiver System
Appendix C: Link Budget Analysis
Effective Receive Sensitivity (Equation D.6)
Effective RX Sensitivity (dBm) = –97 (dBm) – (–6 (dB))
Effective RX Sensitivity (dBm) = –91 (dBm)
Link Margin (Equation D.7)
Link Margin (dB) = –84.3 (dBm) + 91 (dBm)
Link Margin (dB) = 6.7 (dB)
A link margin of 6.7 dB is likely to provide insufficient coverage for this applica-
tion. Consider increasing the SEL-FR12 antenna gain, and changing the location
of the SEL-FT50 to avoid obstructions.