Nautel NX15, Operation And Maintenance Manual

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NX15/NX25 Operations and Maintenance Manual List of terms
Issue 6.0 2019-01-31 Page 5-1
Section 5: List of terms
This section defines some of the terms that are used in Nautel documentation.
ADC.
Analog to Digital Converter.
AES-EBU.
Audio Engineering Society/European Broadcasting Union (AES/EBU) is the name
of a digital audio transfer standard. The AES/EBU digital interface is usually implemented
using 3-pin XLR connectors (the same type connector used in professional microphones). One
cable carries both left and right-channel audio data to the receiving device.
B+.
The high voltage dc generated by the transmitter’s ac power supply for use within the
transmitter. The B+ voltage is used to supply the transmitter’s modulators and other
transmitter circuitry.
Cutback.
A reduction in RF output power, caused by a total power limit fault or the
occurrence of three shutbacks within a five second period.
DAC.
Digital to Analog Converter.
DAM.
Dynamic Amplitude Modulation.
DCC.
Dynamic Carrier Control.
DRM.
Digital Radio Mondiale. A set of digital audio broadcasting technologies designed to
work existing AM radio channels.
DSP.
Digital Signal Processing.
FPGA.
Field Programmable Gate Array.
HD Radio.
HD Radio is another term for In Band On Channel (IBOC) technology. HD Radio
is a trademark of iBiquity Digital Corporation.
IBOC.
Nautel In-Band-On-Channel technology provides high quality digital audio over existing
AM radio channels.
IPM.
Incidental Phase Modulation
Latching alarm.
An alarm that, while active, keeps the transmitter in an ‘RF inhibited’ state.
This type of alarm (e.g., High SWR Shutdown) require a reset - locally or remotely - to attempt
to restore transmitter operation.