Nautel NX25, Operation And Maintenance Manual

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NX300 Operations and Maintenance Manual List of terms
Issue 3.0 2012-11-01 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.