18
User Guide
Power Budget = TX Power - RX Sensitivity - Losses
TX Power = 2 dBm
RX Sensitivity = -25 dB
Losses = (8-channel Mux/Demux #1 loss) + (4-channel Mux/Demux #2 loss) +
(4-channel Mux/Demux #3 loss) + (8-channel Mux/Demux #4 loss)
= 2.5 dBm + 2.0 dBm + 2.0 dBm + 2.5 dBm
= 9.0 dBm
Power Budget = TX Power - RX Sensitivity - Losses
= 2 dBm - (-25 dBm) - 9.0 dBm
= 18 dBm
Example 3: Calculate the power budget for Link B in the following diagram.
Link B is the distance from CWDM SFP #1 to CWDM SFP #2
Radiance R5000
with R153 Line Cards
Mux/Demux #1
Mux/Demux #2
Radiance R5000
with R153 Line Cards
Link B
CWDM
SFP #1
CWDM
SFP #2
Power Budget = TX Power - RX Sensitivity - Losses
TX Power = 2 dBm
RX Sensitivity = -25 dBm
Losses = (8-channel Mux/Demux #1 loss) + (8-channel Mux/Demux #2 loss)
= 2.5 dBm + 2.5 dBm
= 5.0 dBm
Power Budget = TX Power - RX Sensitivity - Losses
= 2 dBm - (-25 dBm) - 5.0 dBm
= 22 dBm
