GB817

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RF Accessories are essential components in any radio system. Typically used for connecting and amplifying signals, they have the ability to boost signals received from radio transmitters and receivers. One such RF Accessory is the GB817. Developed by Royer Telecom, this device is designed to operate in a variety of frequency bands, and is applicable in multiple fields. This article seeks to provide an overview of the GB817\'s application field and working principle.

Application Field: The GB817 is applicable in both private and public radio system bands. The device can be used to power numerous radio systems in frequency bands ranging from HF, UHF, VHF, and CB radio. The GB817 is also suitable for radio systems operating in ISM bands and digital systems using GSM, CDMA, TDMA, and EDGE.

The GB817 can also be used in amateur radio systems. With its large power transmitting capacity, this device can be used to power a number of amateur radio systems operating in both HF and VHF/UHF bands. Additionally, it can be used in fixed and portable applications, and can be deployed in both single-frequency and multi-frequency bands.

Working Principle: The GB817 consists of two stages: a power amplifier and an antenna switch. The power amplifier is comprised of two triode tubes, which serve to amplify the received signal. The antenna switch is built into the antenna and is responsible for ensuring that the amplified signal is routed to the correct antenna port. It is the job of the antenna switch to determine which antenna should receive the signal by selecting the frequency that best matches that of the signal.

The power amplifier is composed of two triode tubes; one for the input and one for the output. The input tube is responsible for amplifying the received signal while the output tube amplifies the amplified signal. Both tubes have a bipolar transistor arrangement that optimizes the signal amplification capacity. Additionally, the output tube has a power limiter that ensures the safe operation of the power amplifier under all conditions.

The antenna switch is an integral component of the GB817 and is responsible for switching the signal from one antenna to another. It works in conjunction with the power amplifier and consists of multiple relays and filters. The relays are responsible for selecting the antenna port that best matches the frequency of the received signal, while the filters make sure that any interference or noise present in the signal is removed. Once the antenna port has been selected, the signal is then routed through the power amplifier and sent out to the antenna.

The GB817 is an essential accessory for any radio system, offering enhanced signal reception and transmission. With its ability to power numerous radio systems and suitable for a variety of application fields, the GB817 is an ideal solution for radio communication. It is easy to install, highly reliable, and offers optimal performance.

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