Motorola SG4-DRT-2X Instruções de Operação descarregar pdf (Página 66)

3-38 Bench Setup and Operation

SG4000 Installation and Operation Manual

Apply power to the node (see Powering the Node in this section). Allow five to ten seconds

for the system self-diagnosis to complete.

9 Verify that the green LED (ON), located on the top panel of each transmitter, is illuminated

to confirm enable status. Refer to Section 4, “Modules,” for fault LED functions.

10 Measure the RF power at the test point on the top of each return path transmitter.

The −20 dB test point is located after the JXP pad location and indicates the level into the

transmitter.

11 Place the proper JXP pad into each transmitter pad facility to achieve the nominal total

power level of −5 dBmV at the test point.

12 Review return path system levels.

The transmitter is configured to drive the laser to the recommended level (+15 dBmV) when

the total combined power at the housing ports connected to each leg of the segmented return

board is approximately +28 dBmV.

13 Measure the optical power level at the DC test point using a multimeter.

The scaled voltage at this test point is 1.0 V/mW.

For more specific information regarding return path setup procedures, refer to the supplemental

document Return Path Level Selection, Setup, and Alignment Procedure.

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Motorola SG4-DRT-2X Instruções de Operação Página 66