Technology & Computing
Optical Link Budget & Receiver Sensitivity Margin Calculator
Calculate the optical power margin available in a fiber link after accounting for losses and receiver sensitivity.
Your inputs
Change any value to update the result instantly.
Available power margin
18 dB
Received power
-6 dBm
Margin after safety allowance
15 dB
Receiver sensitivity
-24 dBm
The link has adequate power margin even after your safety allowance.
Formula and working
Margin (dB) = Tx power (dBm) − total link loss (dB) − Rx sensitivity (dBm)
- 1
Collect the inputs
Transmitter power = 0 dBm; Total link loss (fiber + splices + connectors) = 6 dB; Receiver sensitivity = -24 dBm; Design safety margin = 3 dB
- 2
Apply the formula
Margin (dB) = Tx power (dBm) − total link loss (dB) − Rx sensitivity (dBm)
- 3
Result
Available power margin = 18 dB
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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