Operating instructions

Bench Setup and Operation 3-35
SG4000 Installation and Operation Manual
In a typical installation, the RF module in Ports 1 and 3 are connected at the 2X redundant
return board in configuration location 3. The RF modules in Ports 4 and 6 are connected to
the 2X redundant return board in configuration location 2.
7 Ensure that the PIC cable is properly connected to the lid and center power distribution
board in the housing base.
8 Route and connect the fiber service cable.
9 Apply power to the node (see Powering the Node in this section). Allow five to ten seconds
for the system self-diagnosis to complete.
10 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.
11 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.
12 Place the proper JXP pad into each transmitter pad facility to achieve the nominal total
power level of −5 dBmV at the test point.
13 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 the split redundant return board
is approximately +28 dBmV.
14 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.