The EtherREGEN thread for various network, cable, power experiences and experiments

[Arpiben]

41 minutes ago, Confused said:

So just to clarify this point, if you use a SX spec copper ethernet to fibre media converter, with a SX SFP module and say 1m of fibre cable, everything should be "within spec" with respect to laser power and the EtherRegen's requirements etc.?  Have I got this right?

 

No need to worry about receive power when dealing with SX & LX SFPs even with short fiber cables. 

Do not use inappropriate optical transceivers for distances of 40km and above for home audio applications: it makes no sense.😉

[Arpiben]

There is no reason to use long range SFP transceivers (>40 km) for home applications.

Dealing with ZR SFPs (80 km/ 1500 nm) one must understand that typically:

• receiver optical damage is around +5 dBm
• receiver is saturated for levels above -7 dBm
• receiver sensitivity (min error less level) is around -22 dBm
• transmitter max output power is between 0 dBm and +5 dBm

Fiber loss (~ 0.5 dB/km) is negligible for home applications. Without attenuators the ZR SFP received level will be too high  ( ~ 0 dBm) and out of working range: [. -7 dBm ,- 22 dBm]. Data will be transmitted with a high error rate and depending on SFP characteristics the receiver may be damaged. 

Nota: I am not arguing if one prefers the sound with a distorted fiber transmission channel.😉