10-04-2017, 09:24 PM
[attachment=5832]
Radio Communications System
++
The Radio Communications System (RCS) consists of several exterior communications subsystems which, in combination, provide all exterior communications requirements for the ship with the exception of the Special Intelligence Communications requirements. The RCS subsystems are turnkey installations and consist of the following subsystems: High Frequency Communications System, Very High Frequency Communications (VHF Comms) System, Ultra High Frequency Line-of-Sight Communications (UHF LOS Comms) System, Ultra High Frequency Satellite Communications (UHF SATCOM) System, Extremely High Frequency Satellite Communications (EHF SATCOM) System, Super High Frequency Satellite Communications (SHF SATCOM) System, Communications Support Segment (CSS), Naval Modular Automated Communications System (NAVMACS) II, and the Bridge To Bridge Communications System.
The High Frequency Communications System consists of the High Frequency Radio Group (HFRG) is a fully automated subsystem of the external radio communications system (RCS) aboard surface ships. The HFRG operates in the Very Low Frequency (VLF), Low Frequency (LF), Medium Frequency (MF) and High Frequency (HF) frequency bands and supports full duplex, half duplex and simplex operation for tactical and long-haul voice, interrupted continuous-wave, teletype and digital data communications in the Lower Sideband (LSB), Upper Sideband (USB), Independent Sideband (ISB), Amplitude Modulation Equivalent (AME) and Link 11 modes of operation. The HFRG consists of three subsystems: the transmit subsystem, the receive subsystem and the control/monitor subsystem (CMS).
The Transmit Subsystem operates (in increments of 10 Hz) in the frequency range of 2 Mhz to 30 Mhz and is used primarily for broadband circuits. The Transmit subsystem is designed to allow all exciters to operate in the Link 11 mode, but contains the assets required to support two (2) 1kW narrowband circuits which are the primary HF Link 11 circuits.The operational capabilities of the transmit subsystem require both broadband and narrowband antennas. The operational configuration of the transmit subsystem is accomplished in response to commands from the CMS and frequency changes (except narrowband) are completed in less than 100 milliseconds. The transmit subsystem reports to the CMS when the system is configured and also reports detected failures.
The Receive Subsystem operates (in increments of 10 Hz) in the frequency range of 14 Khz to 1.619 Mhz and 2 Mhz to 30 Mhz. The receive subsystem requires at least two broadband antennas and 1 or 2 additional antennas dedicated to the use of the Ship Signal Exploitation Equipment (SSEE). The operational configuration of the receive subsystem is accomplished in response to commands from the CMS and frequency changes are completed in less than 20 milliseconds. The receive subsystem reports to the CMS when the system is configured and also reports detected failures.
The Control/Monitor Subsystem is the backup point of control for the HFRG when the system is being controlled by the Surface Ship Automated Communications Control System (SSACCS) (part of the Communications Support System (CSS)). The SSACCS normally controls the HFRG through an interface with the CMS, but if the SSACCS becomes inoperable the CMS automatically assumes the functions of remote control, performance monitoring, test, operator interface, and display of the operational characteristics. The CMS is used to send configuration commands to the transmit and receive subsystems and, in turn, receive configuration completion and operational characteristics from these subsystems.
The Very High Frequency Communications (VHF Comms) System is utilized to transmit and receive tactical, operational and administrative information (both voice and data) in the VHF range (30-300 MHz). The VHF Comms System primarily supports line-of-sight (LOS) communications between accomplishing units and is comprised of several different Radio Groups or subsystems. Most of the Radio Groups are functionally interchangeable and therefore are not individually dedicated to a specific circuit or function.
The Ultra High Frequency Line-of-Sight Communications (UHF LOS Comms) System is utilized to transmit and receive tactical, operational and administrative information (both voice and data) in the UHF range (300 MHz - 3 GHz). The UHF LOS Comms System is capable of operating in either the UHF LOS or UHF Satellite Communications (UHF SATCOM) mode. Most of the UHF LOS equipments are functionally interchangeable and therefore are not individually dedicated to a specific circuit or function.
The High Frequency Communications System consists of the High Frequency Radio Group (HFRG) is a fully automated subsystem of the external radio communications system (RCS) aboard surface ships. The HFRG operates in the Very Low Frequency (VLF), Low Frequency (LF), Medium Frequency (MF) and High Frequency (HF) frequency bands and supports full duplex, half duplex and simplex operation for tactical and long-haul voice, interrupted continuous-wave, teletype and digital data communications in the Lower Sideband (LSB), Upper Sideband (USB), Independent Sideband (ISB), Amplitude Modulation Equivalent (AME) and Link 11 modes of operation. The HFRG consists of three subsystems: the transmit subsystem, the receive subsystem and the control/monitor subsystem (CMS).
The Transmit Subsystem operates (in increments of 10 Hz) in the frequency range of 2 Mhz to 30 Mhz and is used primarily for broadband circuits. The Transmit subsystem is designed to allow all exciters to operate in the Link 11 mode, but contains the assets required to support two (2) 1kW narrowband circuits which are the primary HF Link 11 circuits.The operational capabilities of the transmit subsystem require both broadband and narrowband antennas. The operational configuration of the transmit subsystem is accomplished in response to commands from the CMS and frequency changes (except narrowband) are completed in less than 100 milliseconds. The transmit subsystem reports to the CMS when the system is configured and also reports detected failures.
The Receive Subsystem operates (in increments of 10 Hz) in the frequency range of 14 Khz to 1.619 Mhz and 2 Mhz to 30 Mhz. The receive subsystem requires at least two broadband antennas and 1 or 2 additional antennas dedicated to the use of the Ship Signal Exploitation Equipment (SSEE). The operational configuration of the receive subsystem is accomplished in response to commands from the CMS and frequency changes are completed in less than 20 milliseconds. The receive subsystem reports to the CMS when the system is configured and also reports detected failures.
The Control/Monitor Subsystem is the backup point of control for the HFRG when the system is being controlled by the Surface Ship Automated Communications Control System (SSACCS) (part of the Communications Support System (CSS)). The SSACCS normally controls the HFRG through an interface with the CMS, but if the SSACCS becomes inoperable the CMS automatically assumes the functions of remote control, performance monitoring, test, operator interface, and display of the operational characteristics. The CMS is used to send configuration commands to the transmit and receive subsystems and, in turn, receive configuration completion and operational characteristics from these subsystems.
The Very High Frequency Communications (VHF Comms) System is utilized to transmit and receive tactical, operational and administrative information (both voice and data) in the VHF range (30-300 MHz). The VHF Comms System primarily supports line-of-sight (LOS) communications between accomplishing units and is comprised of several different Radio Groups or subsystems. Most of the Radio Groups are functionally interchangeable and therefore are not individually dedicated to a specific circuit or function.
The Ultra High Frequency Line-of-Sight Communications (UHF LOS Comms) System is utilized to transmit and receive tactical, operational and administrative information (both voice and data) in the UHF range (300 MHz - 3 GHz). The UHF LOS Comms System is capable of operating in either the UHF LOS or UHF Satellite Communications (UHF SATCOM) mode. Most of the UHF LOS equipments are functionally interchangeable and therefore are not individually dedicated to a specific circuit or function.