Motorola LM100 Operations Instructions download pdf (Page 42)

Operation 4-7

GX2-LM1000E* Installation and Operation Manual

Install an AGC option in the systems’ nodes to compensate for the expected signal-level

change within the dynamic range of the equipment. Allow for adequate gain reserve at the

optical node during installation.

3 Apply the preferred initial channel load.

4 Allocate time for the AGC to adjust the RF drive level to the laser and to adjust the levels at

the nodes.

5 Apply the additional channel load.

6 Allocate time for the AGC to adjust levels to the new channel load.

Additional adjustments to the GX2-LM1000E* should not be necessary because the AGC

maintains a constant per-channel level to the laser diode.

The benefit of using Preset mode with AGC for an increase in channel load is that you eliminate

the need to re-adjust levels to each fiber node in the field.

Using Preset Mode (with AGC control in the GX2-LM1000E* only)

Implementation using Preset mode requires AGC control in the GX2-LM1000E* but not in each

node.

To implement an increased channel load using Preset mode:

1 Operate the GX2-LM1000E* in Preset mode.

2 Apply the preferred initial channel load.

3 Allocate time for the AGC to adjust the RF drive level to the laser.

4 Apply the additional channel load.

5 With the GX2-LM1000E* in Preset mode, visit each fiber node in the field and adjust the

drive levels as necessary.

Additional adjustments to the GX2-LM1000E* should not be necessary because the AGC

maintains a constant per-channel level to the laser diode.

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Motorola LM100 Operations Instructions Page 42