Motorola SG 2000 Instrucciones de operaciones descargar pdf (Pagina 20)

Overview 2

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AT&T SLW2500 Installation and Operation Manual

Gain Selection

To use the gain option selection chart, Figure 2-8, first find the point on the left hand axis that

corresponds to the expected optical input power at the node. Move across this horizontal line to

the right until it intersects a vertical line corresponding to the desired RF output level.

If this intersection is above and to the left of the diagonal standard gain line for the channel

loading under consideration, the SLW2500 will give optimum performance with minimum

padding. Operation at a combination of input and output levels below and to the right of the

standard gain line is not possible.

Figure 2-8 illustrates the gain option selection chart for 870 MHz:

Figure 2-8

Optical input versus 870 MHz gain

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Bridger output level (dBmV), 870 MHz equivalent

(Trunk output level is 10 dB lower)

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870 MHz Gain Selection

Standard gain, 110 ch

Figure 2-8 gives the output level at 870 MHz. For a system loaded with analog channels to

750 MHz, the actual level at 750 MHz is 2.4 dB lower with the standard overall tilt of 16 dB.

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Motorola SG 2000 Instrucciones de operaciones Pagina 20