Motorola SG 2000 Betriebsanleitung PDF herunterladen (Seite 19)

-10

1010

10 Overview

AT&T SLW2500 Installation and Operation Manual

Level Control

The gain of hybrid IC amplifiers varies with temperature. In addition, changes in system

channel loading and/or splices in the fiber link can change the level of the received signal.

The standard TCU board compensates for anticipated hybrid gain changes by sensing housing

temperature and signaling needed changes to the RF attenuator.

Options and Accessories

Table 2-1 provides a list of SLW2500 options and accessories available to AT&T:

Table 2-1

Options and accessories

Model Description Function

TCU

Thermal control unit Controls amplifier gain for changes in hybrid gain at the sensed temperature.

JXP-*A

Fixed attenuators Are used to adjust amplifier levels and are available in 1 dB steps from 1 through

24 dB. The appropriate value must be installed.

JXP-ZX

0 dB attenuator This attenuator is used in place of JXP-*A pads when no attenuation is needed.

FTEC

Crowbar overvoltage

protection

An electronic crowbar/surge protector that can be used to replace the existing 230

volt gas discharge surge protector.

GFAL

Test probe Used to evaluate node performance.

F/JXP

Injection probe Used to inject a signal for test purposes.

SG2-SB/*

Strand bracket For hanging a strand mounted node.

SG2-PS

Power supply

Provides the +24 V and +5 V dc supply to the station. It has an extended voltage

range and is power-factor corrected.

SG2-SERCAB/*

Service cable A 6-fiber service cable available with SC/APC or FC/APC connectors.

SG2-FE-*/870

Forward equalizers Used to increase output tilt at one or more ports in an 870 MHz system. They are

available in 1 dB increments from 2 dB through 6 dB.

SG2-LR

Forward path lightwave

receiver

Converts the received optical signal to broadband RF.

SG2-*

Analog return

transmitters

Refer to the list provided in “Optical Return Transmitters” in this section.

DS-SG2-DRT*

Digital return

transmitter

Refer to the list provided in “Optical Return Transmitters” in this section.

SLW25-RPLR

Return path laser

receiver

Converts the received return path optical signal to return path RF.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 52 53

Kommentare zu diesen Handbüchern

Keine Kommentare

Motorola SG 2000 Betriebsanleitung Seite 19

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Vernetzung Motorola SG 2000