On 10/09/2010 15:21, [email protected] wrote:
The linked document (which you trimmed) specifically says that an attenuator is required for an ER link<20km (underscoring your point), but doesn't mention that requirement for the OP's LR link.
The patch cable length really doesn't matter. What matters is the attenuation and ensuring that your received light level at each end is within the threshold of what's acceptable to the transceiver receiver port.
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