Motorola SG4-DRT-2X Instrucciones de operaciones descargar pdf (Pagina 24)

2-10 Overview

SG4000 Installation and Operation Manual

Bandpass Frequency

The SG4000 modular optical node is only available in a forward bandpass frequency of 1 GHz. If

you are deploying the SG4000 in a system with less than 1 GHz, refer to Figure 2-8 to determine

the tilt at the appropriate frequency. For example, the standard node slope of 14.5 dB at 1 GHz

equates to 12.5 dB at 870 MHz.

Figure 2-8 illustrates the tilt selection chart for 1 GHz bandwidth.

Figure 2-8

Relative level dB versus 1 GHz slope

Relative level, dB

Frequency, MHz

Digital loading is 6 dB below analog levels

50 150

250 350

450

550

750650

870 1 GHz

SG4000 1 GHz straight line slope chart

12.0 dB tilt (L)

14.5 dB tilt (S)

16.0 dB tilt (H)

Station Slope

The SG4000 is configured in three standard station slopes, as illustrated in Figure 2-8. The

slope is defined as a straight line from F

fwdmin

(minimum forward frequency) to 1 GHz. The total

station slope is a combination of (1) the receiver output, (2) the forward configuration board, and

(3) the SG4-RF module, along with (4) port entry board slope. Modules measured apart from the

station may not represent the entire station tilt.

Station slopes include:

Model Slope (dB)@870 MHz Slope (dB)@1003 MHz

10 12.0

12.5 14.5

14 16.0

The SG4-R* receivers use a Linear Midstage Equalizer (LME) to generate slope that is common

to all of the SG4-RF modules attached to that particular receiver. The SG4-RF modules contain

a Flatness/Slope Board (FSB).

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Motorola SG4-DRT-2X Instrucciones de operaciones Pagina 24