What is an example of a radio communication system?
Unlike cell phones, radios don't require monthly subscriptions or per-call charges. In the United States, two-way radios are regulated by the Federal Communications Commission (FCC) and use the Ultra High Frequency (UHF) and Very High Frequency (VHF) frequency bands. UHF radio uses line-of-sight communication and repeaters. They provide better reception than CB radios, which can use either HF 27 MHz or UHF 477 MHz. VHF radios are mainly used in marine applications and emergency personnel. VHF/UHF two-way radios are also available. Radio accessories include:
external GPS receiver
Two-way UHF radios use the Family Radio Service (FRS) and/or General Mobile Radio Service (GMRS). In the US, FRS radios use 14 channels (1-14) and do not require an operator license. They have a maximum power level of 0.5 mW and a relatively short range. FCC regulations prohibit user modification of the FRS radio transceiver and FRS antenna. The GMRS radio uses eight dedicated channels (15-22) and requires an FCC carrier license. They have a greater range than FRS radios and can be equipped with antennas to extend their range. Most GMRS radios are rated at 1.0 to 5.0 W, with a maximum allowable power level of 50 W. FRS/GMRS hybrid or dual service radios provide access to both FRS and GMRS frequency bands. They can operate without an FCC license if only using the FRS channel.
Radios vary in performance specifications and features. The CB radio has 40 channels, squelch or mute function, public address (PA) switch, purifier, and circuitry to reduce radio frequency (RF) gain. UHF radios vary in range, usually measured in miles or kilometers.
Premier cables are RF resistant, high bend test capable, and have strain relieved connectors. Premier Cable makes the job fast, easy and reliable.
While there are many factors to consider when designing an overall system, terminal blocks are an optimal solution for complex electrical system connections. With a variety of color options and configurations, Premier Cable’ terminal blocks offer a range of options to meet your design challenges.
CAN-bus has been widely used in various automation control systems. For example, CAN-bus has incomparable advantages in various fields such as automotive electronics, automatic control, smart buildings, power systems, and security monitoring.
M12 encoding types are A encoding, B encoding, D encoding and X encoding. A-code, B-code and X-code are some of the earliest developed and longest-available M12 connectors. The latest M12 coding types currently under development are K coding for AC and L coding for PROFINET DC.
The three different sizes of NMEA 2000 certified DeviceNet standard cabling are "micro," "mid," and "mini."
The Premier Cable Starter Kits provide everything you need to get to create a basic NMEA 2000 network from scratch.
DeviceNet_network is a fieldbus network protocol based on Controller Area Network (CAN). In the DeviceNet network, the terminal resistor plays the role of compensation and protection for signal transmission. The function of the terminal resistor is to eliminate signal reflection and interference and ensure the signal transmission quality.