Nautel NX10 Installation Manual

Nautel NX10 Installation Manual Manual pdf 51 page image

NX10 INSTALLATION MANUAL COMMISSIONING TASKSVERSION 2.0 2016-05-06 PAGE 2.8.9Going On-AirIMPORTANT: Before going on the air, if you want the safety interlocks to operate properly, theshorting jumpers installed in “Pre-Commissioning Tasks” on page 2.8.1, Step 3 should be removed andthe antenna system’s interlock should be installed.When the commissioning tests are successfully completed, connect the studio audio to the transmitter'sappropriate audio input connector, follow the steps below to go on-air, and then complete any emissiontests that are required.1. Turn off the power using the ac disconnect switch, if one is being used, or else at the ac source.2. Connect the transmitter's RF output to an antenna system (or verify that the current connection isintact). Ensure that a ferrite toroid (Nautel Part # LP23) is installed on the RF coaxial hardline at thetransmitter’s output.3. Turn on the transmitter’s ac power.4. Connect the desired modulation source to the transmitter (see Section 1.7, “Planning audioinputs”of the Pre-Installation manual for connection options).NOTE: If analog modulation is being applied, it is recommended that negative modulation peaksdo not exceed -96% and positive peaks do not exceed 140% to minimize audio distortion causedby signal clipping.5. Use the front panel UI controls to begin transmitter operation. For detailed instructions on usingthe front panel UI or the remotely accessible advanced user interface (AUI), refer to theNX10Operation & Maintenance Manual.6. Check the four LEDs on the left-hand side of the front panel UI. They should all be green, indicatingnormal operation. If not, check for alarms by navigating to the front panel’s Main Menu -> ViewStatus -> View Alarms screen and consult the NX10 Troubleshooting Manual for detailedinformation on each alarm.WARNING! IF A JUMPER IS PLACED BETWEEN INTERLOCK PINS J6A-19 ANDJ6A-20 ON THE CONTROL/INTERFACE PWB, SAFETY FEATURES CONTROLLEDBY THE EXTERNAL INTERLOCKS WILL BE DISABLED. A FAIL-SAFE METHODOF ALERTING PERSONNEL TO THIS FACT SHOULD BE IMPLEMENTED.VOLTAGES WHICH ARE DANGEROUS TO LIFE WILL BE PRESENT ON THE RFOUTPUT STAGES IF THE TRANSMITTER IS TURNED ON.