LLigetfa
join:2006-05-15
Fort Frances, ON
| Off Topic: Fibre Optic Microscope
Anyone have a reccommendation on a good optical magnifier to inspect ST fibre terminations. If it can also do SC, LC, an MTRJ, that would be a bonus.
I have a 36 fibre bundle buried between two buildings and the dB loss rose on them suddenly. This fibre is just one of many segments stretched over two kilometres of industrial complex. Because of this one segment, my loss bugdet is exceeded on many of the runs and I've had to resort to trying to eke out fractional gains by cleaning up connectors while I schedule someone with an OTDR to ring out the bad fibre. I've had to play musical fibres also as I get varying losses on the individual fibres so I'm shifting the lower loss fibres to where my loss budget is bad.
I plan to abandon the whole bundle and pull a new arial run but it takes times to release funds for half a kilometre of new fibre run. |
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lutful
Premium
join:2005-06-16
Ottawa, ON
| Noyes scopes seem more affordable than other brands based on on-line pricing at Tessco and other sites. Electrorent may have them in Canada.
BTW an OTDR will not distinguish between the various types of fault at the connector, so you may need to use a red laser source to check for poor mating. Noyes makes several models. |
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LLigetfa
join:2006-05-15
Fort Frances, ON
| While I don't own an OTDR I have used them on occaision and realize their limitations. The intention of the OTDR is not to test connectors, just building fibre. For end-to-end with connections, I already have a laser light source and detector. That was what I used to determine that the buried cable is damaged. The OTDR will tell me where the damage is so I can dig it up. We had a very sudden cold spell right after a bout of freezing rain so I suspect frost heaving.
I've also used the Fluke optical microscope that displays on an LCD screen. Image quality is good but the unit I borrowed did not have fittings for MTRJ and could only look at the male ends of LC and was shaky at that. |
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VariableARK
join:2003-03-17
USA | reply to LLigetfa
kindof ot, but anyone know of good, reasonably priced 100base-bx ethernet->fiber transceivers? |
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public
join:2002-01-19
Santa Clara, CA
 ·DSL EXTREME
| said by VariableARK  :kindof ot, but anyone know of good, reasonably priced 100base-bx ethernet->fiber transceivers? media converters?
»fiberopticcables.stores.yahoo.ne···00b.html
much less on ebay. |
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