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Tempest900 2-Channel Operating Manual
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.
Accu-Sync: Tempest Wireless technology that synchronizes transmission timing for up to 10 BaseStations to prevent interference.
Auto-Null: A process that automatically optimizes the BaseStation 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 BaseStation 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 BaseStation display, with white-on-black lettering. Usually the banner is the title of a menu screen.
Call Alert: A feature of intercom BeltStations 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 uctuate, 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 the program sound unless the director or another member of the
production team interrupts the program sound with special instructions through the IFB.
iSelect On-Command Roaming: Permits the BeltStation user to select the BaseStation appropriate for the current location or activity.
License Free: The 900 MHz band is approved for non-licensed use in virtually every country. It is the responsibility of the user to ensure that
the system is operated in accordance with local laws and regulations.
Lithium-polymer battery: A rechargeable battery that provides long lasting, reliable power, with a minimum of space and weight, utilizing
lithium based chemistry in a stable polymer.
Loop -Thru Connectors: Allow multiple BaseStations to share a common channel.
Master BaseStation: A Tempest BaseStation that powers the 2-Wire Hybrid circuitry in itself and up to 9 additional BaseStations across the
looped-thru shared channel. The Master BaseStation provides power and line termination.
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