NV30/NV40 Operations and Maintenance Manual List of terms
Issue 3.3 2014-12-10 Page 5-1
Section 5: List of terms
This section defines some of the terms that are used in Nautel documentation.
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-channel and right-channel audio data to the receiving device.
AUI. The Advanced User Interface is the 17-inch front panel that allows for extensive control and
monitoring of the transmitter.
Cutback. A reduction in RF output power, caused by the occurrence of multiple shutbacks within a
pre-defined period.
DHCP. Dynamic Host Carrier Protocol.
DSP. Digital Signal Processing.
EEPROM. Electrically Erasable Programmable Read-Only Memory.
Foldback. A reduction in RF output power, caused by transmitter not acheiving the desired set point
power level (typically this is related to high VSWR).
HD Radio. High Definition (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 FM
radio channels.
Intermediate Power Amplifier (IPA). Refers to circuitry within the transmitter’s RF power
modules which amplifies the exciter's RF output to a level sufficient to drive the final RF amplifiers.
LED. Light Emitting Diode (also referred to as lamp).
LUT. Look-Up Table.
MER. Modulation Error Ratio. This ratio quantifies (in decibels) the performance of a digital radio
transmitter.
OFDM. Orthogonal Frequency Division Multiplexing is a digital data encoding method that uses
multiple narrowband carrier frequencies.
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