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E-10
A
PPENDIX
E: C
ABLING
R
EQUIREMENTS
Verifying Maximum
Attenuation for
Mixed Fibers
If you mix Category 1 and Category 2 receivers and transmitters, use
Table E-7 to verify the maximum attenuation for each possible
combination.
*This combination is dispersion-limited rather than loss-limited. The
expected maximum length is approximately 35 km.
Example.
If a Category 2 transmitter is outputting to a Category 1
receiver, the maximum attenuation is 26.0.
DS-3 Coax Cables
Connect the CoreBuilder 7000 DS-3 interface by a 75 Ohm coaxial cable
that complies with DS-3 standards. The maximum cable length is 450
feet. To connect the DS-3 interface:
1
Prepare two coax cables - one for Tx and one for Rx. You may want to
mark the ends of the cables to identify them easily.
2
Connect both cables to the DS-3 BNC connectors on the CoreBuilder
interface. Make sure to connect Rx and Tx cables according to what is
indicated on the interface front panel.
3
Connect the two cables at the other end according to the opposite of the
first connection Rx to Tx and Tx to Rx.
Table E-7
Acceptable Cable Plants for Combination of Categories 1 and 2
Output Category Input Category
Minimum Loss
(dB??)
Maximum
Attenuation
(dB??)
1 1 0.0 10.0
1* 2* 1.0 16.0
2 1 14.0 26.0
2 2 15.0 32.0