Clear-Com Communication Systems Page 91 of 100
Tempest 2400 Wireless Intercom System
Glossary
2-Wire or TW: A type of intercom system characterized by audio signals transmitted and received on the
same pair of wires at the same time. The connector usually associated with 2-Wire or TW is a 3-PIN XLR.
4-Wire: A type of intercom system characterized by audio signals transmitted on one pair of wires and
received on a different pair of wires.
2xTX: Tempest Wireless proprietary technology that wirelessly transmits duplicate audio data packets from
two antennas, a fraction of a second apart and on different frequencies, to minimize the possibility of lost
data packets.
Accu-Sync: Tempest Wireless technology that synchronizes transmission timing for up to 10 base stations
to prevent interference.
Auto-Null: A process that automatically optimizes the base station 2-Wire, intercom interface hybrid to
match the line characteristics of the external 2-Wire system.
AUX IN: Inputs program or other audio sources into the Tempest base station to one or more intercom
channels. The Auxiliary IN connector is a ¼” Tip/Ring/Sleeve jack that accepts a standard ¼” TRS plug.
AUX OUT: Outputs intercom audio from one or more intercom channels to an external system. The Auxiliary
OUT connector is a ¼” Tip/Ring/Sleeve jack that accepts a standard ¼” TRS plug.
Banner: The top line of the base station display, with white-on-black lettering. Usually the banner is the title
of a menu screen.
Call Alert: A feature of intercom belt packs intended to visually and/or audibly alert users to a
communication transmission.
Channel: A duplex communication path to transmit and receive voice communication.
Desensing or receiver desensitization: Desensing occurs when a transmitter is operating in close,
physical proximity to a receiver, even if that transmitter is not on or near the receiver’s operating frequency.
Receiver desensitization occurs because receivers must maintain critical voltage and current levels
throughout the front-end stages and a strong (i.e. physically close) transmitter can cause these levels to vary
greatly. As these levels widely fluctuate, the receiver performance will be greatly degraded. Increasing the
physical distance between transmitter and receiver will decrease desensing. The greater the frequency
separation between the two, the less the receiver performance will be affected.
Dual Listen: This beltstation feature permits an operator to simultaneously listen to two channels.
Frequency Hopping, Spread Spectrum (FHSS): Radio technology that utilizes many frequencies in quick
succession, intended to minimize the probability of radio frequency interference.
Full Duplex: Simultaneous two-way conversations (i.e. telephone communication).
GPIO: General Purpose Input Output – a simple device control method.
Half Duplex: Two-way conversations, one-way at a time, such that one person cannot interrupt the other
(i.e. walkie-talkie).
IFB: Interrupted Feedback, or Interrupted Fold-Back - The IFB system connects control room personnel such
as the director, or producer with the performers or “talent”. The performer wears a small earpiece that carries
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