Sometimes a fibre can be too clean indicating a fatal telemetry error on your T3… thats when spacers and the right placement comes in very handy.
Elad I totally disagree that a fibre can be to clean! I have heard that said before and cant believe why people think that! What’s your reasons to say this?
Having worked with fibres for years before coming to ROV’s, you can’t be too clean! Having chased them round the vehicles many times, I find saying they can be too clean to be a total bum steer.
A fibre can have a line that is too good i.e. in it’s losses and a system may not work if these are to low, then you can insert spacers etc to increase the losses.
Kalbo.
Then you can disagree, but it is true.
If the signal being received is too strong it can overload the receiver. I found this out to my cost some years back when we couldnt figure out why the ROV mux stopped working after a tether reterm. It turned out that the amount of signal being received was too strong as the fibre ends were better polished than the ones that had been fitted before and we had to install an attenuator to drop the signal level down to get it to work.
Over the years, different parts of an ROV system can be changed, different connectors, different tethers etc. so the original optical budget calculations for the system may change. It may never be noticed until one day you do one change too many. e.g. changing from using Hotmelts to using Fusion spliced tails.
.
.
