Glossary of Terms

If you are new to digital radio systems, may have some words are not familiar with. The following terminology glossary of some terms are explained, the operation of the station will be helpful to understand the play operation.
Active Information: This is a SCADA system may interrupt the communication of diagnostic collection polling mode (as opposed to a passive information). Active information (or interrupt type) than passive information much faster, because it does not depend on the RTU polling cycle.
Antenna Gain (Antenna System Gain): a value, usually expressed in units of dB, on behalf of gain – the type of power generated from the antenna increases. Minus the system losses with the value (for example, from feeders and connectors) to calculate the total antenna system gain value.
Bit (Bit): the smallest unit of digital data, usually a 1 or a 0 to indicate. Eight (start, stop and parity bits) to form a byte.
Bits – per – second (Bits-pen-second): see BPS.
Byte (Byte): a digital data string, usually consists of 8 data bits, and start, stop and parity bits.
DB {Decibel (dB): According to the signal level from the two calculated as the ratio between a measure. Often used to indicate a system gain (or loss) value.
Data Circuit – Terminating Equipment (Data Circuit-terminating Equipment): see DCE.
Data communication equipment (Data Communitions Equipment): see DCE.
dBi: dB values, free space, the “ideal” isotropic radiator as a reference for dB (isotropic radiator). Often used to represent the antenna gain.
DBm: zero level of 1 mW in decibels. Is used to measure the signal power, the transmitter output power, received signal strength or absolute units.
DCE: data circuit – terminating equipment (or data communications equipment). In data communication terms, it means “computer-to-modem connection” in the modulator “as well.
Digital Signal Processing (Digital Signal Processing): See DSP.
DSP: Digital Signal Processing. DSP whole circuit to be responsible for most of the critical real-time tasks, the main modulation, demodulation and data port maintenance.
DTE: Data Terminal Equipment. The device provides a digital output signal in the form of data. Connection with the DCE device.
EQ (EQUALIZATION): reducing the amplitude by a balanced network, frequency or phase deformation processing.
Attenuation margin (Fade Margin): the maximum average received signal strength attenuation can be tolerated, in most cases it can be estimated. On due to multipath, slight loss of the antenna caused by changes in atmospheric displacement or weakening of the signal, providing a tolerance. In most systems, a 20 to 30dB of attenuation margin is sufficient.
Frame (FRAME): a data segment, to comply with specific data protocol and consists of determining the start and end points. It provides a synchronization method.
Hardware flow control (Hardware Flow Contol): One of the radio functions, the role when dealing with high speed from the RTU or PLC data, prevent data buffer overflow. When the buffer overflow, the radio show (CTS) level is low, indicating RTU or PLC data transmission delay in the next step until the CTS has returned to the high state before sending data.
Host computer (Host Computer): installed in the master position on the computer, which controls one or more remote stations from the data collection.
Interrupt-type diagnosis (Intrusive Diagnostics): a remote diagnostic mode, it can query and monitor the radio network, the system “load” influence the transmission of data. See active information.
Delay (Latency): data from a radio TXD (pin 2), it appears in another radio station to the RXD (pin 3) between the delay (usually expressed in milliseconds).
MAS: Multi-address system. A radio system, the master station and several remote stations connected to collect telemetry data.
Master (station) {Master (Station)}: refers to the main computer connected to the radio. Through the main station points on the network polling.
MCU: Microcontroller Unit. This is a processor, is responsible for booting the system, synchronous load, and keying control.
Micro control unit (Microconrtoller Unit): See MCU.
Multiple address system (Multiple Address System): see MAS.
Network Diagnostics (Network-Wide Diagnostics): a kind of radio station network monitoring and management of advanced methods.
Uninterrupted type diagnosis (Non-intrusive diagnostics): see passive information.
Passive Information (Passive messaging): This is a communication without interrupting the diagnosis of the SCADA system polling acquisition mode. Diagnostic data to go through a period of uninterrupted collection; collected data to carry information through the SCADA system to the main station (in contrast to the active information).
Load data (Payload data): This is a radio network launched by the user communication data. Payload data transmission is the primary purpose of the radio communication network.
Multipoint systems (Point-Multipoint System): a radio communication network or system, including a central control station, control it with the data terminal equipment with a range of remote station to exchange data.
Polling (Poll): from the main computer (or host PLC) to a remote station to issue a query data requests.
PLC: Programmable Logic Controller. It is used for discrete input and output of a dedicated special purpose microprocessors. Can be used as a host or a strong RTU.
Programmable logic controller (Programmable Logic Controller) – See PLC.
Remote (station) {Remote (Station)}: connected with the relevant master, in a radio network.
Redundant operation (Redundant Operation): a radio station equipped with two runs and two power supplies for use in the event of failure can be automatically switched.
RTU: Remote Terminal Unit. A radio installed in remote sites for data collection devices. 2710/4710 to provide an internal RTU simulator radio, the radio used to isolate external RTU or error.
SCADA: Supervisory Control and Data Acquisition. A radio system through the functionality provided by MAS general vocabulary.
SWR (Standing Wave Ratino): see SWR.
Supervisory Control and Data Acquisition (Supervisory Control and Data Acquisition): See SCADA.
SWR: Notes Bobby. Parameter from the transmitter antenna systems between forward power and reverse power ratio. As a general requirement, reflected power can not exceed the positive power of 10% (about 2:1 SWR).