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Calcimator

PON Splitter Calculator

Calculate passive optical network splitter loss, link margin, and bandwidth per user for GPON, XGS-PON, and EPON deployments.

Inputs

dBm
dBm
dB

Results

Splitter Insertion Loss

16.05 dB

ONU Received Power

-16.05 dBm

Link Margin

11.95 dB

Total Link Loss21.05 dB
Link Viable (1=Yes)1
Max Split Ratio256:1
Max Addl Fiber Loss16.95 dB
Down BW per User77.8 Mbps
Up BW per User38.9 Mbps
How to Use This Calculator
  1. Enter the Split Ratio (1:N) for your passive splitter (common: 1:32 for GPON, 1:64 for XGS-PON).
  2. Enter OLT Transmit Power (dBm) and ONU Receiver Sensitivity (dBm) from the transceiver specs.
  3. Set Fiber + Connector Loss (dB) for the outside plant between OLT and ONUs.
  4. Select PON Type (GPON, XGS-PON, or EPON) to set the downstream/upstream data rates.
  5. Review Splitter Insertion Loss, ONU Received Power (dBm), Link Margin (dB), and per-user bandwidth (Down/Up BW per User in Mbps).

How the result changes with Split Ratio (1:N)

Split Ratio (1:N)Splitter Insertion LossONU Received PowerLink Margin
1512.76 dB-12.76 dBm15.24 dB
4617.63 dB-17.63 dBm10.37 dB
8420.24 dB-20.24 dBm7.76 dB
11521.61 dB-21.61 dBm6.39 dB

What each input means

Split Ratio (1:N)
Splitter ratio (common: 2, 4, 8, 16, 32, 64, 128)
OLT Transmit Power
Optical line terminal transmit power in dBm
ONU Receiver Sensitivity
Optical network unit minimum receive power
Fiber + Connector Loss
Total fiber, connector, and splice losses (excluding splitter)
PON Type
1=GPON (2.5G/1.25G), 2=XGS-PON (10G/10G), 3=EPON (1G/1G)

How this is calculated

Formula

Splitter Loss = 10·log₁₀(N) + Excess Loss

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Split Ratio (1:N) = 32, OLT Transmit Power = 5, ONU Receiver Sensitivity = -28, Fiber + Connector Loss = 5 = 5 input(s) provided
  2. Calculate Splitter Insertion Loss
    Splitter Insertion Loss
    16.05 = 16.05
  3. Calculate ONU Received Power
    ONU Received Power
    -16.05 = -16.05
  4. Calculate Link Margin
    Link Margin
    11.95 = 11.95
  5. Calculate Total Link Loss
    Total Link Loss
    21.05 = 21.05
  6. Calculate Link Viable
    Link Viable
    1 = 1

Engine last updated . Checked against 5 independently-derived tests — how we verify calculators.

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