Motorola SG4-DRT-2X Instruções de Operação descarregar pdf (Página 45)

Bench Setup and Operation 3-17

SG4000 Installation and Operation Manual

Position jumper J5 as required for the number of active outputs you are using.

In a typical installation, the RF modules in Ports 1 and 3 are connected to the forward

redundant segmented 2X board in configuration location 1. The RF modules in Ports 4 and 6

are connected to the forward redundant segmented 2X board in configuration location 4.

9 Ensure that the PIC cable is properly connected to the lid router board and center power

distribution board in the node base.

10 Ensure that the SIC cable is properly connected to the EPIM and center power distribution

board in the housing base, as illustrated in Figure 3-14.

11 Move the jumper on the EPIM board from the SW1 auto to the SW1 a position, thereby

disabling receiver two. See Section 4, “Modules,” Embedded Plug-in Module for detailed

information on the switch and jumper settings.

12 Route the fiber service cable into the node and fiber tray.

13 Measure the optical input power on the primary and secondary forward pigtails leaving

enough length to connect them to the receiver bulkhead connectors.

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

for the system self-diagnosis to complete.

15 Connect the service cable to the primary and secondary SG4-R/* bulkhead connectors.

16 Verify that the green LED (ON), located on the top panel of the SG4-R/* in lid optics slot 1, is

illuminated to confirm enable status.

17 Using a voltmeter, test the optical input power to receiver one.

Figure 4-2 illustrates the optical power test point on the top panel of the SG4-R/* receiver.

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

18 Measure the RF output level at the primary receiver −20 dB test point using an RF meter.

For 0 dBm (1.0 mW) input, the receiver output level is approximately 26 dBmV at 870 MHz.

Other output levels are presented in Table 4-2.

19 Select a JXP-* pad from Table 2-2. Insert it into the receiver pad facility.

20 Check all −20 dB test points on SG4-RF modules on the left side of the node.

These modules are connected to the forward redundant segment 2X board in forward

configuration location 1.

21 Determine how much output (excess or shortage) is present at the port with the lowest level

and insert the necessary pad into the receiver pad facility of receiver 1.

22 If necessary, adjust level variances between output ports by placing a pad at the particular

output pad position.

23 Move the jumper on the EPIM to the SW1 B override position, which turns receiver 1 off. The

red fault LED indicator on receiver 1 and the green enable LED on receiver 2 should

illuminate.

24 Repeat Steps 18 through 22 and verify that the node output levels are the same as the

primary receiver. Adjust the secondary receiver output pad only; do not re-adjust any output

padding in the RF modules.

25 Move the jumper on the EPIM board back to the SW1 AUTO position.

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Motorola SG4-DRT-2X Instruções de Operação Página 45