User's Manual Part 5

Defining RF Logical Channels Section 3
Element Management System (EMS) 4.0 User Manual
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3.12 Defining RF Logical Channels
Using the host SDR Config window, shown in Figure 36, you can define a logical
RF channel and enter gain settings for each path within the channel. A logical RF
channel is a multiplex of up to eight RF voice channels. A logical RF channel
consists of a forward path, a primary reverse path, and a secondary reverse path, if
supported by the remote unit. The gain setting is simply a number that affects the
amount of gain to applied to the signal within the specified path. A negative value
results in attenuation. Each gain setting increment corresponds approximately to 1
dBm of adjustment.
To define an RF logical channel
1. From the View menu, select the names of a host/remote pair.
2. Click on the host SDR Cfg tab to display the window shown in Figure 36.
(This example shows typical a data display for logical RF channels that are
already defined.)
Figure 36. Host SDR Cfg Window
3. Determine which logical RF channel you want to enter data for. To enter val-
ues for that channel, move across in the same row in the window. The system
supports up to eight logical channels.
4. Click on the Modulation Type field to display a pulldown list such as shown
in Figure 37. From the list, select the modulation type of the channel being
configured.