Popular in Course
verified elite notetaker
Popular in Business
This 7 page Document was uploaded by an elite notetaker on Monday December 21, 2015. The Document belongs to a course at a university taught by a professor in Fall. Since its upload, it has received 8 views.
Reviews for Spectrum-Management
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 12/21/15
Practical Application: 1005 29 January 2014 Spectrum Management Spectrum Man gement Introduction Military operations are complicated by increasingly complex demands on the Electromagnetic Spectrum (EMS). All modern forces depend on the EMS. The EMS is a physical medium through which joint forces conduct operations. EMS‐ dependent devices are used by both civilian and military organizations and individuals for intelligence; communications; position, navigation, and timing; sensing; Command and Control (C2); attack; ranging; Chemical, Biological, Radiological, and Nuclear (CBRN) sensor data collection/transmission; Unmanned Aircraft Systems (UASs); civil infrastructure; data transmission and information storage and processing. The importance of the EMS and its relationship to the operational capabilities is the key focus of Joint Electromagnetic Spectrum Management Operations (JEMSMO). JEMSMO is a functional area ultimately responsible for coordinating EMS access among multinational partners, throughout the operational environment. The EMS is a physics‐based maneuver space essential to control the operational environment during all military operations. Information and data exchange between platforms and capabilities will at some point rely on the EMS for transport. This maneuver space is constrained by both military and civil uses as well as adversary attempts to deny the use of the EMS, creating a congested and contested environment. This constrains freedom of maneuver to use all capabilities of friendly forces throughout the operational environment. QRC Technologies – 29 January 2014 1 Spectrum Ma agement Joint Electromagnetic Spectrum Management Operations 20 March 2012 Depiction of DoD Operations in Spectrum Bands Below 40 GHz Problem As one can see, the electromagnetic spectrum is a valuable resource that supports the backbone of all phases of military and commercial operations. It’s use must be carefully planned and controlled for the consequences could be severe. Interference can disrupt even the most important missions or operations. For this reason, thespectrum must be carefully monitored for both unintended and intentional electromagnetic signals. Not only government applications can be affected, but local commercial services can be shut down or caused to function abnormally. Even the local fast food drive‐thru can be impacted. The unintended effect on emergency services can be very damaging. One valuable tool in the mission to monitor and isolate possible interference is the QRC Technologies WBT recorder/transmitter. This dual use recorder can visually examine portions of the spectrum, record the results and retransmit the data for either later analysis or testing for effect. QRC Technologies – 29 January 2014 2 Spectrum Man gement 1) The QRC WBT operates like a narrow band spectrum analyzer. The unit will display a frequency band of up to 50 MHz or two channels of 25 MHz or less. The smaller bandwidths are available for longer recording periods. This spectrum may then be recorded for a historical or baseline performance record. Later measurements can be compared to this record for evidence of degradation or frequency/bandwidth changes. The unit contains two hot swappable disc drives (960 MB) that are easy to remove and store. This single box self‐ contained unit can be battery powered for true portability. 2) A comprehensive library can be compiled to document spectrum performance for future analysis. This can be done not only for the emitters, but for areas of the spectrum of concern. Do you have a low SNR satellite link? Checking and documenting the guard bands may be a wise thing to do. Were there any adjacent signals before? Check the disk. Preventing creeping interference is a smart way to prevent future problems. 3) The ability to retransmit pre‐recorded signals is another way to get the jump on potential problems. Test signals may be generated to determine any interactions before the installation. The test signal may be moved to any frequency within the WBT’s range. The output level is adjustable and QRC Technologies – 29 January 2014 3 Spectrum Man gement external power amplifiers can boost the level to any range desired. This capability is also excellent for the training role. The ability to transmit recorded files lets future interference hunters develop their skill set. The WBT can be a vital tool for the interference hunter. It may be even more important for interference prevention. It is versatile, capable of many applications, and easy to operate. Future on board applications will improve capability. There is a planned application space designed into the unit for customers to implement their own applications. Planned features include full band sweep capability, waterfall display and threshold triggering. The need to review spectrum usage, to clearly articulate requirements and identify opportunities for sharing does not fall upon the DoD and other federal users alone, but also upon all users of the spectrum in the United States. Spectrum sharing is a way to satisfy the growing demands, both private and government, for this finite and increasingly important resource. (From the AD/DOD) This points to the fact that spectrum monitoring is essential. Let us help. QRC Technologies – 29 January 2014 4 Spectrum Manag ment WBT Specifications Technical Data: WBT Size (W x H x D) 18.7” x 12.4” x 3.1” Weight Under 10.0 Lbs 10.4” LCD (Resistive Touch) 700 NIT Display Communication Links Gigabit Ethernet Power Consumption 83W Nominal External Power Input 10.0 – 32.0 VDC Operating Temperature Range 0 to +50°C (+32 to +122°F) (Without Condensation) ‐20 to +80°C (‐4 to +176°F) (Without Storage Temperature Range Condensation) Frequency Range 50 MHz to 4.4 GHz Supplied Power Adapters AC 120‐240V Power Brick (20VDC regulated) Supplied Power Adapter Automobile Power Plug (12VDC Nominal) Thermal Management Forced Air File Format QVRT (VITA‐49 Standard Derived) Tuner Configuration Options Frequency Range A 50 MHz to 2.2 GHz B 400 MHz to 4.4 GHz QRC Technologies – 29 January 2014 5 QRC Specializes inActive & Passive, FullyAutonomous Survey Devices for Cellular Communication Networks. QRC Products Cover GSM, CDMA, EVDO, WCDMA, WiMAX & LTE Protocols. Our Products Can Be Used for Network Discovery, CompetitiveAnalysis, InterferenceAnalysis, Mission Preparation, Optimization, & Critical InfrastructureAnalysis. 1211 Central Park Boulevard Fredericksburg, VA22401 voice: 540.446.2270 fax: 540.548.4080 www.qrctech.com