Nautel NX100 Preinstallation Manual

Also see for NX100: Installation manual Manual Troubleshooting manual Manual

Nautel NX100 Preinstallation Manual Manual pdf 66 page image

NX100 Pre-installation Manual Planning audio inputsIssue 3.2 2017-03-31 Page 7-1Section 7: Planning audio inputsThe NX100 supports all current forms of AM broadcasting. This section describes the requirementsassociated with the audio feeds to the transmitter.• Analog inputs– Balanced (mono)– AES/EBU• Digital inputs - see page 7-2– IBOC - see page 7-2– DRM - see page 7-2• Other considerations - see page 7-3– Frequency synchronization signals - see page 7-3– Audio Player via USB - see page 7-3– DRM Simulcast - see page 7-3Analog inputsThe transmitter does not have extensive audio processing capabilities. Use an external audioprocessor to ensure that the audio source material is processed properly. An audio processor willadjust the dynamic range, loudness, frequency response and symmetry parameters to suit thetransmission system. Carefully control the peak levels.For monaural applications, the audio may be processed to provide up to 135% positive peak programmodulation, with a 100 kW RF carrier at the nominal ac voltage.Refer to the Operating section of the NX100 Operations and Maintenance Manual for an example ofsetting an analog preset.The NX100 accepts the following analog inputs:Balanced (mono)Modulating audio must be applied from an external source to BALANCED ANALOG AUDIO XLRconnector J12 on the control/interface PWB (A11A1). The audio source must be balanced, able todrive a 600  load, and produce a level between -10 and +12 dBm for 100% modulation.Only one analog input is provided. Program content from the input is applied to both exciters.