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An Icom IC-R5 hand-held scanner A GMRS radio that also has scanning capabilities. A scanner (also referred to as a radio scanner) is a radio receiver that can automatically tune, or scan, two or more discrete frequencies, stopping when it finds a signal on one of them and then continuing to scan other frequencies when the initial transmission ceases.
A trunked radio system is a two-way radio system that uses a control channel to automatically assign frequency channels to groups of user radios. In a traditional half-duplex land mobile radio system a group of users (a talkgroup ) with mobile and portable two-way radios communicate over a single shared radio channel, with one user at a time ...
Uniden was established on February 7, 1966, by its founder Hidero Fujimoto as "Uni Electronics Corp". Uniden became a well-known brand in the 1970s by manufacturing and marketing millions of citizens band radios (CB), under the Uniden brand as well as other companies such as Midland and Realistic, which rebranded the equipment under their own labels.
This is a four digit identifier unique to each trunking system. The purpose of the System ID is to allow radios to operate only on that specific system, and to identify each system. The System ID also allows for enhanced security because a radio now requires a System Key, unique to the System ID in order to be programmed onto any given system.
Several hand-held Project 25 radios used around the world. Project 25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. P25 was developed by public safety professionals in North America and has gained acceptance for public safety, security, public service, and commercial applications worldwide. [1]
Up to 25 MHz (40 MHz b/w cards limited by GigE interface) [125] 14 16 Yes 25 Msps for 16-bit samples; 50 Msps for 8-bit samples 0.5 ppm TCXO. 0.01 ppm w/ GPSDO Option Gigabit Ethernet Yes Yes Yes Xilinx Spartan 3A-DSP 1800 USRP N210 [126] Pre-built DC – 6 GHz Up to 25 MHz (40 MHz b/w cards limited by GigE interface) [125] 14 16 Yes
In the U.S., the analog AMPS standard that used the cellular band (800 MHz) was replaced by a number of digital systems. Initially, systems based upon the AMPS mobile phone model were popular, including IS-95 (often known as " CDMA ", the air interface technology it uses) and IS-136 (often known as D-AMPS, Digital AMPS, or " TDMA ", the air ...
The ASTRO 25 digital radio system is claimed to provide superior audio quality and advanced features which complies with the Federal Communications Commission's 2013 narrowbanding requirements. [6] ASTRO 25 currently operates in the 700 MHz, 800 MHz, 900 MHz, UHF and VHF bands for voice and data operation.
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