GREEN-GO DIGITAL INTERCOM SYSTEM - Desktop and fixed stations
These are desk-top, rack-mounting and wall-mounting intercom stations. They communicate over the network with other Green-Go digital intercom stations. Each station is connected to a network switch using standard Ethernet cabling. They can be powered over the network if the switch provides power over Ethernet; an accessory power supply can be used for desktop and rack-mounting types.
Multi-channel Desktop Stations
Multi-channel desktop stations have a compact footprint and are available in 8, 16, 24 and 32 channel versions. They provide a clear overview of many channels and offer a simple interface to listen and talk to selected channels. This makes the system suitable for complex live event and broadcast applications where several intercom channels need to be simultaneously monitored while conversing with one or more selected channels. Each channel identification is displayed on an LCD strip. The audio level of each circuit can be adjusted for best intelligibility.
Full duplex communication is by headset or the in-built loudspeaker and optional gooseneck microphone. Intercom channels are presented in banks of four and each channel is controlled by two rows of four switches. The upper row enables conversations with other stations on the selected intercom channel. These switches offer latching and non-latching modes, depending on the duration for which they are pressed. Each microphone switch illuminates green, orange or red (blinking) to indicate talk to the channel, talkback from the channel, or `Call` signal received. The lower row of switches operate in conjunction with the three `Soft` keys and four `Mode select` keys in the Control Section to offer three functions; `Listen` and `Remote Mic Kill`, `Call` (to a group or individual) and `Cue` modes. For improved listening, the `Isolate` function will mute all intercom circuits that are not in `Talk` mode, so unnecessary distractions are removed until the conversation is finished.
Multi-channel desktop stations may be powered from PoE (Power over Ethernet) or an external 12V DC power supply. The rear panel offers two Ethernet ports with built-in Ethernet switch. Port 2 can be used for power via PoE if no external 12V supply is available. This leaves Port 1 available for a laptop which may be connected for system set-up.
Line-in and line-out facilities are presented on 3-pin XLR connectors. They allow analogue audio to be injected into and extracted from the intercom system. A set of General Purpose Input Output (GPIO) connections are available on a D-sub 9-pin connector, providing opening and closing contacts to provide external control interfacing.
Rack-mounting Station
The 12-channel rackmount station has similar features to the desktop stations, but is designed to fit in 2U of a 19 inch rack. The front panel can be angled outwards to make operation easier.
Wallmount Stations
Two wall-mounting outstations, based on the beltpack, are available. The external Ethernet connection is relocated inside the case and GPIO (2x in and 2x out) connections are available internally using screw terminals. The size of the LCD display is larger than that of the beltpack. Two versions are available; a speaker and microphone combination or a headset only alternative. A non-audio version is also available for information/cue-light duties.
Headsets
The 4-pin, male, XLR, headset connectors are compatible with headsets with an impedance greater than 32 ohms and fitted with mating connectors such as those from Tecpro, Beyer and many other brands. If the microphone type is an electret, a switchable bias voltage is available.
Gooseneck microphones
Where the intercom station has a 3-pin female XLR connector for a microphone, Canford CxxxXB24 types are suitable.
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Used Green-GO communications
The Green-GO communications system is an Ethernet network based digital intercom system. The Beltpack X and Wireless Beltpack X have an identical intercom engine capable of 32 channels, a program audio channel and an extra channel for direct user communication.The Green-GO Wireless Antenna integrates the Wireless Beltpack X into an existing wired network. The Green-GO communications system has no single point of failure because there is no central unit that carries the entire system.
Multi-Channel Stations
Green-GO Multi-Channel Stations provide direct access to users or groups in your communication network. The Multi-Channel Stations operate with any Green-GO beltpack or other Multi-Channel station connected in the same network without the need of a matrix.
Interfaces
The Green-GO interface range consists of several high end devices that can integrate analog intercom systems into the Green-GO digital Ethernet network (2-Wire / 4-Wire / InterfaceX), connect remote networks to a Green-GO network and allow remote user login (BridgeX), or connect radio devices to a Green-GO network (RDX).
Wall Panels
The Wall Panel X is a wall mount station with direct access to three channels (either a single direct user or a group). The Wall Panel X has an integrated speaker and a headset connection.
Switches
Green-GO switches form the backbone of the network distribution system. They have been specifically designed for live entertainment applications where a mixture of data protocols would overload and saturate commercially-available network switches. The Green-GO switches range is based on a high specification Ethernet layer 2 switching engine with an optimized CPU controller.
Accessories
Various accessories to complete the Green-GO product line.
Software
Software applications to configure and manage Green-GO devices.
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Efficiency Rating: Level of sound output measured at a prescribed distance with a standard input power. Efficiency rating standard is 1 watt (2.83V at 8 ohms) at 1 meter over a specified frequency range and is measured in decibels.
Equalization: Loosely, any type of relative frequency adjustment. Specifically, the process of changing the frequency balance of an electrical signal to alter the acoustical output.
Equalizer: A component designed to alter the frequency balance of an audio signal. Equalizers may be graphic, parametric, or a combination of both.
Fade: A gradual increase in audio, i.e. a fade-up, or a gradual decrease in audio, i.e. a fade-down.
Feedback: The transmission of current or voltage from the output of a device back to the input, where it interacts with the input signal to modify operation of the device. Feedback is positive when it’s in phase with the input and negative when it’s out of phase.
FM: Frequency Modulated.
Frequency: The number of cycles (vibrations) per second. In audio, audible frequencies commonly range from 20 to 20,000 cycles per second (Hz). In video, frequency is used to define the image resolution. Low-frequency video images depict large objects or images. Higher frequencies depict smaller objects (finer details.
Frequency Response: A measure of what frequencies can be reproduced and how accurately they are reproduced. A measurement of 20 to 20,000 Hz, 3dB means those frequencies between 20 and 20,000 Hz can be reproduced no more than 3 dB above or below a reference frequency level.
Full-Range: A speaker designed to reproduce the full range (20 Hz to 20 kHz) of audio frequencies.
Gain: Increase in level or amplitude.
Gooseneck: This refers to a microphone with a flexible neck that is most frequently attached to a podium or lectern. It is designed to allow the speaker to raise or lower the microphone to a suitable height.
Graphic Equalizer: A type of equalizer with sliding controls that creates a pattern representing a graph of the frequency-response changes. Raising sliders boosts the affected frequencies lowering sliders cuts (attenuates) the affected frequencies.
HDCP: High-Bandwidth Digital Content Protection. Created by Intel, HDCP is used with HDTV signals over DVI and HDMI connections and on D-Theater D-VHS recordings to prevent unauthorized duplication of copyright material.
HDR: Hard-Drive Recorder. Device that uses a computer hard drive to store compressed digital audio and video signals.
High Pass: A filter that passes high frequencies, and attenuates low frequencies. Same as low cut.
Hz: Hertz or cycles per second. Something that repeats a cycle once each second moves at a rate of 1 Hz.
Incue/Inq/In-Point: These words all refer to the initial few seconds of audio signifying the beginning of the production.
Integrated Amplifier: A combination preamp and amplifier.
Impedance: A measure of the impediment to the flow of alternating current, measured in ohms at a given frequency. Larger numbers mean higher resistance to current flow.
KHz: Kilohertz or one thousand Hz.
Lavaliere: A small microphone that attaches to clothing, allowing the speaker to have a hands-free presentation.
Line Array: A group of speakers that have been arrayed or "built up" in the vertical or horizontal plane, which allow for a highly consistent sound field. A Line Array is perfect for medium to large audiences.
Line-Level (Low-Level): A level of electrical signals too low to make the average speaker move sufficiently. Amplifiers receive line-level signals and amplify them to speaker level.
lockout: The final words of a segment used to signify the production’s conclusion.
Low Pass: A filter that lets low frequencies go through but doesn’t let high frequencies go through. Same as high cut.
MHz: Megahertz, or 1 million Hz.
Midbass: The middle of the bass part of the frequency range, from approximately 50 to 100 Hz (upper bass would be from 100 to 200 Hz). Also used as a term for loudspeaker drivers designed to reproduce both bass and midrange frequencies.
Midrange: The middle of the audio frequency range. Also used as a term for loudspeaker drivers designed to reproduce this range.
Mixer: This is the unit in which audio signals are directed from. A mixer provides for both mic and line input combinations while allowing you to control one or more outputs.
MLP: Meridian Lossless Packing. Encoding format that is able to completely reconstruct the original signal at the receiving end. No information is lost or discarded, regardless of how trivial it might be. Used to encode six channels of high-resolution audio on DVD-A.
Mono: Monophonic sound. One channel.
MP3: MPEG-1 Audio Layer-3. Compression scheme used to transfer audio files via the Internet and store in portable players and digital audio servers.
Natural Sound (NATS): The nonverbal audio that occurs in a non-studio setting. NATS can be used to help characterize the setting.
Noise: An unwanted portion of a signal such as hiss, hum, whine, static, or buzzing.
Nonlinear Editing: Digital audio systems that allow for clips to be extracted without affecting the master recording.
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