Westermo LRW-102 - Manual (Page 15)

15 6650-2260
Optical Power Budget
The maximum supported link lengths as specified in the table above should only been seen as indica-
tive. The allowed link length is calculated from the Optical Power Budget (OPB), (the available optical
power for a fibre-optic link), and the attenuation of the fibre, comprising losses due to in-line con-
nectors, splices, optical switches and a margin for link aging (typical 1.5 dB for 1300 nm).
The worst-case Optical Power Budget (OPB) in dB for a fibre-optic link is determined by the differ-
ence between the minimum transmitter output optical power and the lowest receiver sensitivity.
FX (Fibre) SM-LC15 MM-LC2
Fibre connector LC duplex LC duplex
Fibre type Singlemode
9/125 mm
Multimode,
62.5/125 and 50/125 mm
Wavelength nm 1310 1310
Transmitter
Output optical power min/max –15/–8 dBm** –20/–14 dBm*
Receiver
Input sensitivity, max –31 dBm –31 dBm
Receiver
Input optical power, max –8 dBm –8 dBm
Optical power budget,
worst-case 16 dB 11 dB
Transceiver type Small Form Factor Pluggable (SFP)
Multi-Sourcing Agreement (MSA) compliant
Laser class Class 1, IEC 825-1 Accessible Emission Limit (AEL)
FX (Fibre)
Bi-di
LC-20
Bi-di
MM LC-2
Fibre connector LC Simplex LC Simplex
Fibre type Singlemode
9/125 μm
Multimode
62.5/125 and 50/125 μm
Wavelength nm, connector 1
Wavelength nm, connector 2 Tx1310, rx 1550 TX 1550,
rx 1310
Tx 1310, rx 1550 Tx 1550,
rx 1310
Transmitter
Output optical power min/max -10/0 dBm ** –10/–8 dBm *
Receiver
Input sensitivity, max –28 dBm –28 dBm
Receiver
Input optical power, max 0 dBm –0 dBm
Optical power budget,
worst-case 18 dB 18 dB
Transceiver type Small Form Factor Pluggable (SFP)
Multi-Sourcing Agreement (MSA) compliant
Laser class Class 1, IEC 825-1 Accessible Emission Limit (AEL)
* Output power is power coupled into a 62.5/125 μm multimode fibre
** Output power is power coupled into a 9/125 μm singlemode fibre
*** The optical power should be reduced by at least 5 dB (SM-LC80 and Bi-di LC-60)
or 3dB (SM-LC-40 and Bi-di LC-40) between the optical output and input.