Nokia 6800 Series Manuel d'utilisateur télécharger pdf (Page 128)

6800/7000 Series - Distribution and Routing Products Installation and Operation Manual 101

Specification Chapter 10: VSE-6802 Serial Equalizing Distribution Amplifier Module

Jumper and Potentiometer

Jumpers and

Potentiometer

Name Function

J1 Auto

Reclock/

270MHz

This jumper provides the

selection of the reclocking mode.

In the Auto Reclock mode, the re-

clocking circuit locks the input

data to one of the five rates

automatically. In 270 MHz mode,

the reclocking circuit locks the

input data to 270 MHz directly,

which reduces the re-locking

time.

J2 No-lock

Disable

When the input data is not locked

and J2 is set at the No Lock

position, the contact closure port

will not report the no-locking

alarm.

J3 No-data

Disable

When the input data is not

present and J3 is set at the

N_DATA position, the contact

closure circuit will not report the

alarm of the data absence out.

R2 (pot) Threshold

Level

This pot is designed for the

adjustment of the input data

threshold level in the input level

detect circuit. Used to eliminate

the maximum cable length. (The

shorter the cable, the less jitter).

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Nokia 6800 Series Manuel d'utilisateur Page 128