APECTOS POSITIVOS

8-32. The AN/PRC-112 combat search and rescue transceiver is a replacement for the AN/PRC-90-2. The AN/PRC-112 has frequency ranges of—

z AM voice on 121.5 MHz, 243 MHz and 282.8 MHz. z UHF frequency of 225–320 MHz.

8-33. The AN/PRC-112 (refer to Figure 8-7) operates in the following modes: voice, beacon, transponder mode, 406 search and rescue satellite, and UHF SATCOM. It is also dependant on the program loader KY- 913 which has a keypad for data entry and an eight character display used to display the entered data and messages to the operator. The program loader attaches to the radio during programming and supplies the required power to the radio when attached. (Refer to TM 11-5820-1037-13&P for more information on the AN/PRC-112.)

Figure 8-7. AN/PRC-112 and program loader KY-913

JOINT TACTICAL RADIO SYSTEM

8-34. The JTRS is the DOD radio of choice for radio requirements. The components of JTRS include airborne maritime fixed station, ground mobile radio, and handheld man-pack small form fit. JTRS are software based networking radios that will deliver networks to the mounted, dismounted, and un-mounted joint force.

Note. At the time of publication JTRS had not been fielded to Army units and was in the process

of being developed and tested. Pre-engineering design model ground mobile radios were available in the Experimental BCT Future Combat System.

8-35. The concept behind the JTRS family of radios (refer to Figure 8-8 for an example of the JTRS) is for all military services to migrate toward a commonality of media among Soldiers, while concurrently out- pacing the growth rate of information exchange requirements and eventually realizing a fully digitized tactical environment. JTRS lays the foundation for achieving network connectivity across the RF spectrum. The network will provide the means for low-to-high rate digital information exchange, both vertically and horizontally, between warfighting elements. It will also enable connectivity to civil and national authorities.

Figure 8-8. Joint tactical radio system ground mobile radio

8-36. The JTRS was designed to meet the emerging service needs for secure, multiband/multimode, high capacity digital radios for the future tactical environments. The JTRS provides increased interoperability among the Services, reduce upgrade costs through software programming (add new capabilities, change wave forms, and provide waveform enhancements), and support future legacy communications requirements.

8-37. The JTRS has ease of operation, redundancy, and security. It also has network capable, demand adaptive (dynamic bandwidth management), reliable, maintainable, deployable, and more survivable than the current generation of analog radios and stovepipe networks. The key features of the JTRS family of radios systems include—

z Simultaneous multichannel operation; has a fixed radio requirement for a minimum of four- channel operation (threshold) scalable to 10 channels (objective).

z Narrowband and wideband waveforms currently used in the 2 MHz and 2 GHz frequency range, to include HF ALE, SINCGARS, VHF AM 8.88 kHz operation for European ATC, ATC data links, HAVEQUICK I/II, UHF SATCOM DAMA, EPLRS, and Link 16.

z Increased throughput for data communications capabilities, including commercial waveforms. z Multimode support for voice, data, video, and other communications.

z Integrated GPS, information security, modem, and baseband processing functions.

z Provide networking such as cross banding, bridging, relay, IP compatibility, and near real-time task organization.

z New capabilities, or provides waveform upgrades, as required.

z Extend with modular hardware and software, and can be reconfigured in the tactical environment.

z Interface with inventory PAs, antennas, and ancillary equipment.

z Operations in various domains—airborne, maritime/fixed, vehicular, dismounted (manpack), and handheld.

8-38. JTRS radios range from low cost terminals with limited waveform support, to multiband, multimode, and multichannel radios supporting advanced narrowband and wideband waveform capabilities with integrated computer networking features. The JTRS family will be open system architecture, interoperable with current legacy communications systems, capable of future technology insertion, and capable of providing both LOS, and BLOS, communications capabilities to the Soldier.

8-39. JTRS has several functionalities, it is—

z To the user—plug and play voice, high data throughput, and video-capable communications in a transparent network, with the ability to expand and modify the capacity and capability of the individual radio, links, and networks to accommodate user demands.

z To the communicator—intensive planning, management, and control:

„ Automated central planning and management; distributed technical control. „ Information security, spectral efficiency, and electromagnetic interference

(EMI)/electromagnetic compatibility.

„ Gateways to other systems (military, civil, joint, multinational, host, and

nation).

z The joint tactical radio family of systems, which are scalable hardware configurations and multiple programmable waveforms and modes, capable of being operated and monitored while unattended, and remotely controlled and have standard interfaces and legacy radio emulation to operate in selected legacy radio nets.

z The joint tactical Internet, to include—

„ All hardware and software to form and manage a seamless mobile tactical

radio Internet.

„ Common operating environment and dynamic power management. „ Dynamic routing and traffic load management.

„ Embedded position location and automatic SA feed to the network.

JTRSW

8-40. Wireless tactical networking is one of the most critical capabilities a JTRS software defined radio will provide to the Soldier. The JTRS networking waveforms enable extension of networking to the battalion, company, and dismounted Soldiers.

8-41. The initial increment of JTRS being developed includes three networking, one BLOS waveform, and ten new software defined radios. The new networking waveforms are Soldier Radio Waveform, focused on the disadvantaged user using size, weight, and power constrained radios; Wideband Networking Waveform, for use on more capable vehicular, rotary-wing and fixed-wing aircraft; and the Joint Aerial Network-Tactical Edge for the fast moving aerial fleet that requires a very low latency capability. The BLOS waveform is the Mobile User Objective System, which will provide more capacity and throughput than the current UHF SATCOM system.

8-42. Each of these waveforms fills a particular operational need in the tactical environment, yet each provides a common transport function for IP-based traffic. The reprogrammable nature of the radio allows selection of the software waveform giving it multiple radios and networking capabilities, including legacy capabilities in one joint tactical radio set.

8-43. The waveform software developed for JTRS includes not only the actual RF signal, but the entire set of radio functions that occur from the user input to the RF output and vice versa. For example, in the transmitting JTRS, the waveform software will control the receipt of the data (either analog or digital) from the input device and manage the encoding. The encoded data is passed to the encryption engine. The resultant encoded/encrypted data stream is modulated into an intermediate frequency signal. Finally, the intermediate frequency signal is converted into a RF signal and transmitted to the antenna. These same functions will be reversed in the receiving JTRS with the ultimate output of the data to the user.

JTRSR

R

8-44. The Rifleman Radio (refer to Figure 8-9) will provide Soldiers vertical and horizontal intra-squad network connectivity to achieve the information dominance deemed critical to successfully conduct dismounted operations independent of any vehicle or other communications infrastructure.

Note. The Rifleman Radio capabilities are currently being tested. The radio is projected to be

fielded in FY10.

8-45. The Rifleman Radio will enable the individual Soldier to operate in a tactical voice network with other team members, team and squad leaders via a networking waveform (i.e., Soldier Radio Waveform). It will provide controlled unclassified real-time intra-squad C2 voice communications and transmit position location information enabling—

z A squad to employ much bolder and more sophisticated tactics to attack identified threats decisively.

z Increased speed of movement when conducting individual movement techniques as part of Fire Team and Squad.

z Improved networked communications while dispersed in complex terrain.

z Increased speed of maneuver, a reduced risk of potential fratricide, increased flexibility to transition missions on the move, more bold and sophisticated tactics, and the ability to attack identified threats decisively.

z A reduced exposure to the enemy, synchronized fire and maneuver in complex terrain, increased team movement distances, and a reduced limitation on movement locations.

z Soldiers to communicate with leaders when out of visual contact and shouting distance to conduct movement techniques as part of a squad.

z Leaders to display individual position location information of squad members (via an external display device or as part of a Ground Soldier Ensemble) when out of visual contact to coordinate fire and maneuver.

z Improved SA for leaders to make informed and timely decisions.

Chapter 9