Motorola SG4-DRT-2X Instrucciones de operaciones descargar pdf (Pagina 42)

3-14 Bench Setup and Operation

SG4000 Installation and Operation Manual

Measure the optical input power on the forward pigtails, leaving enough length to connect

them to the receiver bulkhead connectors.

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 Connect the service cables to each receiver bulkhead connector.

11 Verify that the green LED (on), located on the top panel of the SG4-R/*, is illuminated to

confirm enable status.

12 Using a voltmeter, test the optical input power to the receiver in lid optics slot 1.

Figure 4-2 illustrates the optical power test point (

FWD T.P.) on the top panel of the SG4-R/*

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

13 Use an RF meter to measure the RF output level at the receiver −20 dB test point.

For 0 dBm (1.0 mW) input, the receiver output level is approximately 26 dBmV per channel

at 870 MHz. Other output levels are presented in Table 4-2.

14 Select a JXP-* pad from Table 2-2 and insert it into the receiver pad facility.

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

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

location 1.

16 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.

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

output pad position.

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

These modules are connected to the forward segment 2X board in configuration location 4.

Receiver 7 drives configuration board 4, which is connected to Ports 4 and 6.

19 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 7.

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

output pad position.

Unbalanced padding can degrade isolation performance. Ensure that equivalent optical power

levels are present on each receiver if possible.

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Motorola SG4-DRT-2X Instrucciones de operaciones Pagina 42