Nautel NX5, Руководство по установке

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NX5/NX3 INSTALLATION MANUAL LIST OF TERMS
VERSION 3.1 2021-04-22 PAGE 2.11.1
SECTION 2.11: 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.
NE IBOC.
Nautel’s In-Band-On-Channel signal generator. See IBOC. Required for NX series IBOC
installations.
PDM.
Pulse Duration Modulation.
Preset.
A setting that controls power level, active exciter, and power scheduler status on a time-of-day
and date basis. Exciters can be configured on a preset for a specific operating mode (for example,
Exciter A - conventional AM, and Exciter B - IBOC). The NX5/NX3 allows you to pre-program multiple
presets.