Toshiba TOSLINE S20 - Manual (Page 38)

TOSLINE-S20 Active Star Coupler (ASC25) Instruction Manual 6F3B0360
TOSLINE S20 37
Receivable range
Margin
Transmission side end Receiving side end
•
Applied optical cable gives 6 dB/km of transmission loss, (under the use of H-PCF).
•
Connector connection loss is 1 dB/both ends, (2 dB/both ends for non-polishing
case).
At 7 dB of loss (the worst case), 1 km of transmission is possible with a margin of 4 dB.
Figure 9.16 Example of level diagram of an optical fiber cable system
(2) Selection of terminal treatment
For selecting wiring cable and cord, the following-described precautions shall be
observed.
•
Wiring within cubicle
For the case of intra-cubicle wiring with several meters of length, cords are convenient.
Since, however, cords are weak in mechanical strength, the cords shall be fixed at about
two meters of intervals to avoid free-moving of the cords and to avoid direct application of self-
weight onto a connector.
Use of plurality of aligners increases the connection loss and causes troubles. The
number of aligners shall be minimized. And, if the aligners are used, secure a margin on the light
level diagram.
•
Wiring outside cubicle
For the case of outside cubicle wiring, we recommend to use cables in view of durability.
The cable shall be a cord-integrated cable. On laying the cables at site, attach optical connectors
to the cables referring to "9.5 Method of optical connector assembly" and the technical documents
issued by the optical cable manufacturer.