Motorola SG4-DRT-2X Instruções de Operação descarregar pdf (Página 76)

4-4 Modules

SG4000 Installation and Operation Manual

Figure 4-2 illustrates the SG4-R/* receiver with the cover installed (left) and the cover

removed (right).

Figure 4-2

SG4-R/* cover on, cover off

1V/mW

OPTICAL

INPUT

OPTICAL

RECEIVER

ENABLE

FAULT

1 GHz

1550

1310

SLOPE

FAULT

Wavelength

selection jumper

Optical power

test point

LEDs

LME

RF test point

JXP attenuator

Table 4-1 provides additional information on the user-related features of the SG4-R/*.

Table 4-1

SG4-R/* features

Feature Description

Wavelength selection jumper

Used with 1310 nm or 1550 nm transmitters, the wavelength selection

jumper on top of the SG4-R/* optimizes the optical power test point and

optical power status indicator calibration for the system wavelength. Note

that the jumper has no effect on the optical-to-RF performance (gain,

flatness, and slope) of the module.

Optical power test point

Enables monitoring of the optical power level at the input to the module.

The nominal scale factor is 1.0 V/mW.

Receiver JXP attenuator

JXP style interstage pad that enables you to make forward path gain

adjustments.

RF output test point

-20 dB test point that enables you to measure carriers throughout the

forward band.

Receiver enable

A green LED (

ON) that provides visual indication of the receiver’s enable

status.

Fault indicator

A red LED that illuminates when the module is disabled.

Linear Mid-stage Equalizer

Passive plug-in board that helps develop the overall station slope and

affects all of the RF modules attached to the receiver. You can access the

LME by removing the receiver chassis cover.

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