Remote Station
Remote Truck, Remote Unit
Resistance
Resonance
Retractile
RF
RFI
RMS
RU
Relay Frame. The relay feature also works with the 8 GPI outputs of an ADAM™, ADAM™ CS, or Zeus™ intercom system (J27 on a Zeus™ Frame, J903 on an ADAM™ CS Frame, and J11 on the
You can assign a keypanel key to control a GPI output from any of these devices, and then use that key and output to control an external device. For example: you could use a keypanel key to control lighting. Or, you could assign a relay as a level 2 talk key assignment in a stacked talk key arrangement to both send audio and key a device, such as a paging amplifier or a
A mobile television studio. Supports television productions with equipment and production personnel operating positions. Carries cameras, CCUs, switcher, monitors, audio console and ancillary equipment, VTRs, and last, but not least, intercom systems.
In DC circuits, the opposition to current, in AC circuits, the real part of the opposition to current. A condition where an applied signal’s frequency coincides with a natural response frequency of a circuit, device, or system. There must be reactances in the circuit for a resonance, a pure resistance doesn’t resonate.
A cord whose jacket is treated and formed to retract as a spring.
Radio Frequency. Frequencies generally ranging from 15 kilohertz to 150 gigahertz. The electrical energy at these frequencies is often converted to electromagnetic waves that are propagated through space. These waves are the basis of the wireless intercom, radio broadcasting, television broadcasting, microwave ovens, industrial processes. Frequency Name of Band Examples: 3 to 30 kilohertz Very Low Frequencies (VLF) Underwater Communications 30 to 300 kilohertz Low Frequency (LF) Navigation 300 to 300 kilohertz Medium Frequency (MF) AM Radio Broadcasting 3 to 30 megahertz High Frequency (HP) Short Wave Radio, Long Range Terrestrial Communications 30 to 300 megahertz Very High Frequency (VHF) TV, PM Broadcast, Fixed I Mobile Communications, Walkie Talkie, Wireless IFB, Wireless Intercom, Airborne Communications 300 to 300 megahertz Ultra High Frequency (UHF) TV Broadcast, Mobile Communications, Walkie Talkie, 3 to 30 gigahertz Super High Frequency (SHF) Satellite Uplink/Downlink 30 to 300 gigahertz Extremely High Frequency (EHF) Satellite Uplink/ Downlink kilohertz = 1000 hertz megahertz = 1000000 hertz gigahertz = 1000000000 hertz Radio Frequency Interference. This interference may originate from AM and FM radio stations, television stations, light dimmers, electric motors, intermittent incandescent or fluorescent lamps, doorbells, et cetera. It results in either direct demodulation into audio circuits or position sensitive effects.
The abbreviation for
The frequency at which the response of a filter, circuit, network, device, or system changes from its center value by 3 dB.
See Rack Unit(s).
S
SA or S.A.
Semiconductor
Stage Announce. A public address system originating in a control room and ending up on the stage. The SA may also have the functionality of an IFB. This allows the director to interrupt dance music and address the dancers. The SA function is a standard function on the Series 4000 IFB system, the Model 801 / Model 860 system, and the Model 802/ Model 862 system. The SA function is available as a special option on almost any RTS™ Systems user station. In the option case, the SA does not necessarily include the IFB function. An IFB option has to ordered to assure IFB functionality.
A material whose conductivity falls between a conductor and an insulator. Semiconductors include the elements carbon, silicon, and germanium in crystal form. Other semiconductors
146 H a n d b o o k o f I n t e r c o m S y s t e m s E n g i n e e r i n g
