VX3 TO VX6 OPERATIONS & MAINTENANCE MANUAL LIST OF TERMS
VERSION 1.0 2023-08-16 PAGE 2.14.1
SECTION 1.14: 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 micros). One cable carries both left-channel
and right-channel audio data to the receiving device.
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 adverse load conditions (high VSWR). No
shutbacks or cutbacks have occurred.
FPUI. The Front Panel User Interface is the transmitter’s front panel display that allows for extensive
local control and monitoring of the transmitter.
LED. Light Emitting Diode (also referred to as lamp).
LVPS. Low Voltage Power Supply. A module or modules used in the ac-dc power stage that generates
the low level dc supply voltage for the transmitter.
Preset. A setting that controls power level, frequency and audio parameters. The VX3 to VX6 allows
you to pre-program multiple presets.
PWB. Printed Wiring Board.
Remote AUI. The Remote AUI allows for extensive remote control and monitoring of the transmitter.
Shutback. A complete, but temporary loss of RF output power, caused by any one of a variety of
faults, including high VSWR.
Shutdown. A complete and permanent loss of RF output power. Typically follows repeated cutback,
foldback or shutback events.
Surge protection panel. An electrical panel that protects equipment from electrical surges in the ac
power supply, antenna or site ground caused by lightning strikes.
VSWR. Voltage standing wave ratio. This is an expression of the ratio of reverse voltage to forward
voltage on the feedline and antenna system. An ideal VSWR of 1:1 provides maximum transmitter-
antenna efficiency.
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