Motorola SG4-DRT-2X Instruções de Operação descarregar pdf (Página 49)

Bench Setup and Operation 3-21

SG4000 Installation and Operation Manual

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

confirm enable status.

11 Using a voltmeter, test the optical input power to the receivers.

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.

12 Measure the RF output level at the receiver’s −20 dB RF 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.

13 Select the appropriate JXP-* pad from Table 2-2. Insert it into each receiver’s pad facility.

14 Check the −20 dB RF test point on the SG4-RF module connected to each receiver.

15 Determine how much output (excess or shortage) is present at each SG4-RF module. If

necessary, install the appropriate JXP pad at the output pad location.

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 Instruções de Operação Página 49