Link Map

📡

Module A (TX)

10GBASE-SR

OM3 • 0.3 km

📡

Module B (RX)

10GBASE-SR

Instructions

Click on each component in the map above to configure it. Configure Module A (transmitter), the fiber cable, and Module B (receiver), then click Calculate.

Transmitter (Module A)

Select Module

TX Power Min (dBm)

TX Power Max (dBm)

TX Wavelength (nm)

RX Wavelength (nm)

RX Sensitivity (dBm)

RX Overload (dBm)

Link Budget A→B (Auto)

A TX Max - B RX Sensitivity

Fiber Cable

Fiber Type

Cable Length (km)

Use 0.001 for 1 meter

Attenuation TX Path (dB/km)

Based on TX wavelength (editable)

Attenuation RX Path (dB/km)

Based on RX wavelength (editable)

Number of Connectors

Default: 0.5 dB each

Number of Splices

Default: 0.1 dB each

Receiver (Module B)

Select Module

TX Power Min (dBm)

TX Power Max (dBm)

TX Wavelength (nm)

RX Wavelength (nm)

RX Sensitivity (dBm)

RX Overload (dBm)

Link Budget B→A (Auto)

B TX Max - A RX Sensitivity

System Settings

Calculation Mode

Worst case = Industry standard. Best case = Shows potential.

📊 Which mode should I use?

Worst Case (TX Min) — Industry standard for production. Ensures link works even when transmitter is at minimum power spec. Use this for real deployments.
Best Case (TX Max) — Shows maximum potential when transmitter is at peak power. Use this for planning or understanding theoretical limits.

Unit System

Safety Margin (dB)

Recommended: 3-5 dB

Results

Parameter	Calculation	Value	Explanation

⚡ PEAK SFP

Optical Link Budget Calculator

Paste Configuration JSON