Toshiba TOSLINE S20 User Manual download pdf (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.

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Toshiba TOSLINE S20 User Manual Page 38