Advanced Encryption Standard (AES) - A symmetric key encryption technique that will replace the commonly used DES standard. AES provides strong encryption in various environments: standard software platforms, limited space environments, and hardware implementations.
AdvantagePort Expandability - Allows an authorized dealer to add an Advantage Board to upgrade radio functionality.
Antenna Coupler - A device used to match the impedance of a transmitter or receiver, to an antenna to provide maximum power transfer. It allows the connection of 2 mobile stations to one antenna.
Auto Range Transpond System™ - (ARTS™) - Permits two radios operating on the same frequency to monitor each others range in pre-programmed intervals. The Auto-Range Transponder System, a Vertex/Standard exclusive, alerts the operator when another ARTS™-equipped station moves out of communication range. The operator can then advise the other user to move to a better location.
Battery Back-Up Tone - When the battery revert kit is installed, this heads-up alert notifies users during conversations that they're using the back-up battery supply.
Battery Saver - Extends the life of the battery while in use. This feature puts the radio into "sleep" mode during usage. The rest periods are only a micro second in duration, but even micro seconds add up.
Busy Channel Lock-Out - Disallows transmissions over occupied, "busy" frequencies. It also keeps users from monitoring people with different PL or DPL codes.
Compander Included - For narrow-band (12.5 KHz) channel applications, the built-in Audio Companding system compresses the voice waveform during transmission, and expands it during reception, allowing full-sounding audio despite the restricted transmission bandwidth.
Courtesy Beep - Signifies when a person is through talking.
CWID - International Morse Code is used to automatically send out the station ID periodically to identify the owner of the transmitting repeater. This satisfies the requirements of the FCC.
Data Encryption Standard (DES) - An encryption method developed by IBM in 1977. It uses a private 56-bit key that is applied to each 64- bit block of data. The sender and receiver must each know the private key.
Decibel (dB) - A logarithmic measure of sound intensity. It is equal to 10 times the common logarithm of the ratio of output power to a reference input power.
DTMF ANI - Automatic number identification (ANI) transmits an individual ID code with every press, or release of the PTT Identifies a specific user to the dispatcher or the CAD.
DTMF Selective Call - Selective calling mutes receive audio for all transmissions not intended for a specific unit. A unique user code is preprogrammed into each unit to open receiver audio after the correct code is received, eliminating all non-directed chatter on the air.
Emergency Mode - When activated, the "Emergency" feature sends out the DTMF ANI, and cycles between transmit and receive, to serve as an emergency beacon to alert the dispatcher as to the need for immediate aid.
Encryption - Voice inversion encryption function scrambles audio rendering transmission unintelligible except by intended receiver.
Federal Communications Commission (FCC) - A board of five commissioners appointed by the President under the Communications Act of 1934 to formulate Rules and Regulations and to authorize the use of radio communications. The FCC regulates all the communications in the United States by radio or wire line, including television, telephone, radio facsimile and cable systems.
Frequency Modulation (FM) - A method of sending and distinguishing radio signals by modifying the frequency of the radio wave.
IP54 - Water Rating. "Water splashed against the enclosure from any direction shall have no harmful effects."
IP55 - Water Rating. "Water projected in jets against the enclosure from any direction shall have no harmful effects."
IP57 - Water Rating. "Ingress of water in quantities causing harmful effects shall not be possible when the radio is submersed for 30 minutes at a depth of 3 feet"
IP58 - Water Rating. "Ingress of water in quantities causing harmful effects shall not be possible when the radio is submersed for 180 minutes at a depth of 6 feet"
Lithium Ion (Li-Ion) - These batteries do not suffer from the “memory effect” at all (see below). These batteries have twice the energy of Nickel Metal Hydride, although they weigh 33% less. This is especially nice for portable items, such as laptops and camcorders.
Local/Distance - Radio service software (RSS) easily allows the choice for a Local rather than a Distance setting if you desire the 10dB interference protection that this mode provides. Programmable radio wide or to an option button.
"Memory Effect" - If a battery is repeatedly only partially discharged before recharging, the battery will “forget” that it can further discharge. The best way to prevent this situation is to fully charge and discharge your battery on a regular basis.
MIL-STD 810 C, D, E, F - Designed and tested to meet the U.S. military standards approval for Shock, Vibration, Rain & Dust, ensuring it's ability to perform in rigorous work environments.
Nickel Cadmium (Ni-Cd) - The most popular type of rechargeable battery, although it tends to suffer from “memory effect” (see below). It has a high rate of energy discharge, meaning that it is low maintenance with high performance. Ni-Cd batteries can deliver even power until nearly all of the battery has been used. These versatile batteries can operate under extreme conditions of cold or heat (-30c to +50c).
Nickel Metal Hydride (Ni-MH) - The most advanced commercial rechargeable battery. Ni-MH batteries last 40%-50% longer than Ni-Cd batteries. While Ni-MH batteries are slightly more expensive than Ni-Cd, they are less prone to memory effect, operate down to -10c and contain fewer toxic metals for easier "environmentally friendly" disposal.
PL/DPL - (CTCSS/DCS) Private Line or Digital Private Line. Lets the user receive only the calls accompanied by the radio's code and to place calls only to those that accept the code. This helps eliminate disruptive conversations of others who may be sharing radio frequencies.
Relay Delay - Keeps the repeater transmitter keyed a short time after a radio user releases the PTT switch. This allows a user group to conduct a normal conversation without delays from re-activating the repeater. This "polite pause" can be set from 0-7 seconds.
Repeater/Talkaround - You may utilize a repeater to increase range for your radio's signal or to provide telephone interconnect. Talkaround frequencies do just that - they circumvent the repeater to talk directly to another radio.
SINAD - The ratio of signal plus noise, plus distortion to the noise, plus distortion; expressed in decibels. A TIA standard method of measuring receiver sensitivity. Basically a measure of RF signal strength that will result in a reliable signal.
Time Out Timer (TOT) - A timer that when exceeded will shut off the radio's transmit feature. Since most transmissions average 3-4 seconds in duration, a longer single transmission usually indicates an inadvertent keying accident (someone's radio is wedged between the seats and the PTT is jammed on) draining battery life. Or, there's a lengthy conversation going on that needs to be curtailed. The bottom line is, this reduces the chances of annoying busy channels, annoying chatter and annoying dead batteries.
Transmit Battery Saver - Monitors signal strength of last received signal, then selects the next lower TX output power level to conserve battery life.
Ultra High Frequency (UHF) - Frequencies between 300 and 3000 MHz. Typically used indoors or in urban areas.
Very High Frequencies (VHF) - Frequencies between 30 and 300 MHz. Typically used in outdoor, open areas.
Voltage Standing Wave Ratio (VSWR) - The ratio of the maximum voltage to the minimum voltage along a transmission line. It is the measure of the mismatch between the load and the line.
X-PAND - see here...
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