Nautel XR12 Installation Manual

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

XR12 Installation Manual Commissioning tasksIssue 3.0 2009-07-15 Page 11-3CommissioningTurning on the transmitter1. Terminate the transmitter's RF output into a precision, 50 Ω, resistive dummy load that isable to dissipate the RF power being applied to it: 12 kW carrier, 18 kW total required.2. Verify that all panels are installed, and ensure that their attaching hardware is firmlytightened.3. Simulate the closing of all external interlocks. This requires a short circuit between TB1-1and TB1-2 of the remote interface PWB. Ensure all networks connected to the transmitter’sRF output are properly covered.4. In lieu of normal station programming, connect an audio signal generator, preset to 1000 Hzat a zero output level (turned off), between TB2-1 (+) and TB2-3 (-) on the remote interfacePWB.5. Switch on the ac power at the service entrance to turn on the transmitter.6. Look through the window on the left side of the transmitter’s lower rear panel (as seen fromthe back). Verify that all four power status LEDs are on.7. Check the alarm and status indicators (the front panel and GUI). See the XR12 Operating andMaintenance Guide.8. Check the output of the B+ power supply on the GUI. The voltage should be between 320and 340 V dc.9. Check the output of the 5, 15, and 24 V power supplies on the GUI.10. Select Local control.WARNING:If a jumper is placed between interlock inputs TB1-1/TB1-2 on theremote interface pwb, safety features controlled by the externalinterlocks will be disabled. A fail safe method of alerting personnel tothis fact should be implemented. Voltages which are dangerous to lifewill be present on the RF output stages and the antenna system if thetransmitter is turned on.