Nautel XR12 Installation Manual

Also see for XR12: Troubleshooting manual Operation and maintenance manual Preinstallation manual

XR12 Installation Manual Audio and IBOC inputsIssue 3.0 2009-07-15 Page 8-3Routing Analog Installation Cables1. Route audio cables through the cable entry hole in the transmitter’s top panel. See Figure 8.3on page 8-6.2. Route the cables through the ferrite toroid, provided in the ancillary kit, then toward theremote interface PWB, behind the GUI panel (see Figure 6.3 on page 6-4).Figure 8.2: RF Drive Buffer PWB Details – IBOC ConfigurationConnections for an analog installation1. Connect the audio input to TB2 on the remote interface PWB, behind the GUI panel.2. Ensure correct signal polarity for the TB2 connections in order to attain proper asymmetricalmodulation: TB2-1 is positive, TB2-3 is negative, and TB2-2 is ground.IBOC ConfigurationTo ensure maximum reliability of the main analog program, the recommended installation is toconfigure Exciter A for IBOC operation, and to configure Exciter B for analog operation.• If both exciters are driven from the NE-IBOC, the NE-IBOC becomes a potential singlepoint of failure in the system.Note: How you connect the audio cables’ shield depends on the presence or absenceof ground loops. In some installations, you may need to connect the shield at oneend only. In such cases, connect the end that provides the best results.