User's Manual Part 5

Setting RF Forward Attenuation Section 3

Element Management System (EMS) 4.0 User Manual

To view RF signal levels using the NOC-NEM interface

Use the GET DATA command (see Topic 5.5.7 on page 105).

3.11 Setting RF Forward Attenuation

Using the remote unit RF window, you can adjust the current attenuation setting

for the RF forward path. This setting affects the strength of the forward path RF

analog signal transmitted from the remote unit antenna. Adjustments made in

EMS are passed to the remote unit control software, which operates a digital

attenuator. The attenuator provides an attenuation adjustment range of 0 to 31 dB,

and can be set in 1 dB increments. Any input signal with a level of –9 dBm to –40

dBm (composite) can be adjusted to the required level using the forward path

atttenuator.

NOTE: Default settings for the attenuator are the maximum, 31 dB.

NOTE: An external attenuator is required if more than 30 dB of attenuation is

required to adjust the input RF signal to the required level.

To adjust the attenuator, use the procedure below.

To enter attenuation settings for a host RF signal

1. From the View menu, select the names of a host/remote pair.

2. Click on remote RF tab to view the remote RF window (for an example, see

Figure 33 on page 43).

3. Click on the Edit button in the Remote Fwd Att area in the window to dis-

play the Remote Fwd Att dialog shown in Figure 34. (The Edit button to be

clicked on is in the lower right in the figure.)