| Spectrum XXI (SXXI) |
| Primary Purpose | SXXI is The Spectrum Management (SM) Tool |
| designated by the MCEB as The Joint DOD SM |
| standard. It is used to create, modify, renew, |
| and delete permanent/temporary frequency |
| assignments/proposals worldwide. |
| Sub-Functions | SXXI has the following modules: Data Exchange |
| (provides real time access to all DOD frequency |
| assignments worldwide); Interference Analysis |
| module to determine who could be causing |
| interference; EW Deconfliction module used to |
| perform EW missions and determine what friendly |
| forces would be interfered with if the Jamming |
| mission was initiated; Engineering Tools module |
| has the capability to generate using NIMA |
| topographic data terrain coverage plots, signal |
| strength coverage plots, and line-of-sight |
| coverage plots, its also has an HF propagation |
| model, a Satellite look angle, a Spectrum |
| Occupancy Chart, a Cosite Analysis tool, and a |
| coordinate conversion routine (lat/long to mil |
| grid and vice versa); it has a JRFL module Joint |
| Restricted Frequency List which is used in |
| conjunction with the EW module to determine the |
| interference to CEOIs, JRFLs, and Host Nation |
| frequency assignments; it has an Interference |
| report module used with the JSIRs program (Joint |
| Spectrum Interference Resolution) which replaced |
| the old MIJI reporting system; it has an |
| Allotment Plan Generator used to pool frequencies |
| to an organization, which can be placed in a |
| holding area in the software so the best |
| frequencies can be used based on the user |
| background environment. |
| Equipment Requirements | SXXI is PC based and will operate on Windows |
| 95/98/NT 4.0 w/service pack 5 or better/2000. |
| Recommend a 550 MHz Pentium III processor, with |
| 128 MB RAM, and 9 GB HDD (depends on how large a |
| database is to be loaded). |
| Connectivity Requirements | SXXI can be used in a Standalone mode or |
| connected to the SIPRNET. To connect to the |
| SIPRNET user's must be using NT 4.0 w/SP5+ or a |
| user can connect via STU-III models 1100, 1900, |
| 1910, or via STEs. Users who will connect to |
| regional servers to download real time frequency |
| management data must attend the SXXI training |
| course and fill out two separate access forms. |
| Crypto Requirements |
| Normal Locations | As the Joint DOD standard, it is used by the |
| Service's frequency management agencies (at the |
| National level), all CINC's, all the component |
| forces, and at the post/camp/station/base |
| frequency manager levels. |
| Information Managed |
| Products Created |
| Lead Service/Contractor | The lead organization is the Joint Spectrum |
| Center (JSC), Annapolis MD and their prime |
| contractor is IIT Research Institute (IITRI). |
Current Fielding Status | Fielded V2.0.2. |
Known Problems |
DIICOE Compliance Rating | In process to be Level 6 compliant. |
Point of Contact | JSC MR William (Skip) Shealy DSN:281-4956; |
Contractor: Brooks Remencus |
(410) 573-7451 DSN: 281-2511 x 7451. |
Updated by | Captain Eric S. Johnson, USMC, CCSC-01. |
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