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Figure 1. Overall system architecture for MUSTER: Multi-platform signal and trajectory estimation receiver. More Receiver Nodes Bring Ubiquitous Navigation Closer Encouraging results from new indoor tests and advances in collaborative phased arrays come from MUSTER: multiple independently operating GPS receivers that exchange their signal and measurement data to enhance GNSS navigation in degraded signal environments, such as urban canyons and indoors. By Andrey Soloviev and Jeffrey Dickman Bringing GNSS navigation further indoors by adding new users to a collaborative network can help realize the concept of ubiquitous navigation. Increasing the number of receiver nodes to improve signal-to-noise ratios and positioning accuracy lies at the heart of the MUlti-platform Signal and Trajectory Estimation Receiver (MUSTER). This article focuses on benefits of integrating multi-node receiver data at the level of signal processing, considering two case studies: Collaborative GNSS signal processing for recovery of attenuated signals, and Use of multi-node antenna arrays for interference mitigation. MUSTER organizes individual receiver nodes into a collaborative network to enable: Integration at the signal processing level, including: Multi-platform signal tracking for processing of attenuated satellite signals; Multi-platform phased arrays for interference suppression; Integration at the measurement level, including: Joint estimation of the receiver trajectory states (position, velocity and time); and, Multi-platform integrity monitoring via identification and exclusion of measurement failures. To exclude a single point of failure, the receiver network is implemented in a decentralized fashion. Each receiver obtains GNSS signals and signal measurements (code phase, Doppler shift and carrier phase) from other receivers via a communication link and uses these data to operate in a MUSTER mode (that is, to implement a multi-platform signal fusion and navigation solution). At the same time, each receiver supplies other receivers in the network with its signal and measurement data. Figure 1 illustrates the overall system architecture. Open-loop tracking is the key technological enabler for multi-node signal processing. Particularly, MUSTER extends an open-loop tracking concept that has been previously researched for single receivers to networked GNSS receivers. Signals from multiple platforms are combined to construct a joint 3D signal image (signal energy versus code phase and Doppler shift). Signal parameters (code phase, Doppler shift, carrier phase) are then estimated directly from this image and without employing tracking loops. Open-loop tracking is directly applied to accommodate limitations of military and civilian data links. To support the functionality of the receiver network at the signal processing level (that is, to enable multi-platform signal tracking and multi-platform phased arrays) while satisfying bandwidth limitations of existing data link standards, individual receivers exchange pre-correlated signal functions rather than exchanging raw signal samples. Before sending its data to others, each receiver processes the incoming satellite signal with a pre-processing engine. This engine accumulates a complex amplitude of the GNSS signal as a function of code phase and Doppler frequency shift. Receivers then broadcast portions of their pre-correlated signal images that are represented as a complex signal amplitude over the code/Doppler correlation space for 1-ms or 20-ms signal accumulation. For broadcasting, portions of signal images are selected around expected energy peaks whose locations are derived from some initial navigation and clock knowledge. This approach is scalable for the increased number of networked receivers and/or increased sampling rate of the ranging code (such as P(Y)-code vs. CA-code). The link bandwidth is accommodated by tightening the uncertainty in the location of the energy peak. As a result, the choice of the data link becomes a trade-off between the number of collaborative receivers and MUSTER cold-start capabilities (that is, maximum initial uncertainties in the navigation and clock solution). Multi-Node Signal Accumulation An earlier paper that we presented at the ION International Technical Meeting, January 2013, describes the approach of multi-platform signal accumulation for those cases where relative multi-node navigation and clock states are partially known. This section reviews that approach and then extends it to cases of completely unknown relative navigation and clock states. The following assumptions were previously used: Relative position between networked receivers is known only within 100 meters; Relative receivers’ velocity is known within 2 meters/second; Relative clock states are calibrated with the accuracy of 100 nanoseconds (ns) or, equivalently, 30 meters. These assumptions are generally suitable for a pedestrian type of receiver network (such as a group of cellular phone users in a shopping mall area) where individual nodes stay within 100 meters from each other; their relative velocities do not differ by more than 2 meters/second; and, the clocks can be pre-calibrated using communication signals. In this case, zero relative states are used for the multi-node signal accumulation and subsequent tracking. Figure 2 summarizes the corresponding MUSTER tracking architecture. Figure 2. Multi-platform tracking architecture for approximately known relative navigation states. Relative navigation states are initialized based on clock calibration results only: zero relative position and velocity are assumed. These initial states are then propagated over time, based on MUSTER/supplemental tracking results (Doppler frequency estimates and higher-order Doppler terms). Code and frequency tracking states are computed by combining biased and unbiased measurements. Biased measurements are obtained by adjusting supplemental signal images for approximately known relative states only. Unbiased measurements are enabled by relative range/Doppler correction algorithms that estimates range and frequency adjustments for each supplemental receiver. The Kalman filter that supports the optimal combination of biased and unbiased tracking measurements also includes code-carrier smoothing to mitigate noise in measured code phase. For those cases where multi-platform signals are combined coherently, a standard carrier-smoothing approach is used. When non-coherent signal combinations are applied, a so-called pseudo-carrier phase is first derived by integrating Doppler estimates over time and then applied to smooth the code phase. Multi-platform signal accumulation and tracking can be extended to include cases where the relative navigation parameters are completely unknown. For such cases, MUSTER implements an adjustment search to find the values of code phase and Doppler shift for each supplemental receiver that maximize the overall signal energy. Adjustment search must be implemented if MUSTER/supplemental relative states are completely unknown, or if their accuracy is insufficient to enable direct accumulation of multi-platform energy, for example, when the relative range accuracy is worse than 150 meters and an energy loss of at least 3 dB is introduced to the signal accumulation process. For each code phase, Doppler and carrier phase (if coherent integration is performed) from the adjustment search space, a supplemental 1-ms function is adjusted accordingly and then added to the MUSTER function. Multiple 3D GPS signal images are constructed, and the image with the maximum accumulated energy is applied to initialize relative navigation parameters: code phase and Doppler shift adjustments values from the adjustment search space that correspond to the energy peak serve as approximate estimates of relative range and Doppler. The accuracy of these estimates is defined by the resolution of the adjustment search, which would be generally kept quite coarse in order to minimize the search space. For instance, a 300-meter search grid is currently implemented for the code phase, which enables the resolution of relative ranges within 150 meters only. Hence, to mitigate the influence of relative state uncertainties on the tracking quality, a correction algorithm is applied as described in our earlier paper. Figure 3 shows the overall system architecture. Figure 3. MUSTER signal-tracking approach for cases of unknown relative states. The architecture keeps all the previously developed system components and adds the adjustment search capability (red block in Figure 3) to incorporate cases of unknown MUSTER/supplemental receivers’ relative navigation states. To minimize the computational load, adjustment search is performed only for the first tracking epoch. Search results are applied to initialize the estimates of MUSTER/supplemental range and Doppler, which are then refined at each subsequent measurement epoch using a combined biased/noisy tracking scheme. The updated architecture can support cases of completely unknown relative states, as well as those cases where relative states are coarsely known, but this knowledge is insufficient to directly combine multi-platform signals. The complete adjustment search is possible. However, it is extremely challenging for actual implementations due to both large computational load and a data exchange rate associated with it. To exemplify, NcodexNDoppler versions of the multi-platform 3D function have to be computed for the case where Ncode code phase and NDoppler Doppler shift adjustment search bins are used and outputs from two receivers are combined non-coherently. A complete search (1023 code bins and 11 frequency bins) requires computation of 11,253 3D functions. This number increases to (11,253)2 or 126,630,009 if the third receiver is added. In addition, receivers must exchange their complete pre-correlated signal functions, which puts a considerable burden on the computational data link. For instance, the exchange of complete 1-ms functions with the 4-bit resolution of samples (required to track the carrier phase) results in the 45 Mbit/s data rate for only a 2-receiver network. Hence, it is anticipated that for practical scenarios, a reduced adjustment search will be utilized for cases where the accuracy of relative states does not support the direct accumulation of multi-platform signals: for example, when the distance between users in the network exceeds 150 meters. In this case, only segments of 1-ms functions around expected energy peaks (estimated based on approximate navigation knowledge) are exchanged. Phased Arrays Multi-platform phased arrays have been developed to enable interference and jamming protection for GNSS network users who cannot afford a controlled reception pattern antenna (CRPA) due to size, weight, and power (SWAP), as well as cost constraints. The multi-node phased array approach presented here cannot match the performance of CRPA, with its careful design, antenna calibration, and precise knowledge of relative location of phase centers of individual elements. However, it can still offer a significant interference protection to networked GNSS users. The multi-platform phased array implements a cascaded space-time adaptive processing (STAP) as illustrated in Figure 4. Figure 4. Implementation of multi-platform phased array with cascaded space-time adaptive processing. Cascaded STAP implements temporal filtering at a pre-correlation stage, while spatial filtering (in a form of the digital beam forming or DBF) is carried out at post-correlation. Cascaded STAP is implemented instead of joint STAP formulation to remove the need to exchange raw signal samples (which is necessary when DBF is applied at pre-correlation); and, support a novel DBF approach that does not require precise (that is, sub-centimeter to centimeter-level) knowledge of relative position and clock states between network nodes (described later). Signal samples are still exchanged for the estimation of signal covariance matrices that are required for the computation of temporal and spatial weights. However, the sample exchange rate is reduced significantly as compared to the joint STAP: for example, only 100 samples are currently being exchanged out of the total of 5000 samples over a 1-ms signal accumulation interval. The DBF uses the Minimum Variance Distortion-less Response (MVDR) formulation for the computation of spatial weight vector. MVDR constrains power minimization by the undisturbed signal reception in the satellite’s direction: (1) where Φ is the multi-node signal covariance matrix that is computed based on temporal filter outputs; superscript H denotes the transpose and complex conjugate operation; and, η is the steering vector that compensates for phase differences between array elements for the signal coming from the satellite’s direction: (2) In (2), u is the receiver-to-satellite line-of-sight (LOS) unit vector; rm is the relative position vector between phase centers of the mth node and MUSTER; (,) is the vector dot product; and, λ is the carrier wavelength. Following computation of DBF weight, multi-node 1-ms GPS signal functions are combined: (4) where     is the complex 1-ms accumulated signal amplitude of the mth node for the (l,p) bin of the code/carrier open-loop tracking search space. The result is further accumulated (for example, over 20 ms) and then applied for the open-loop estimation of signal parameters. One of the most challenging requirements of the classical MVDR-based DBF is the necessity to estimate relative multi-node position and clock states at a centimeter level of accuracy. To eliminate this requirement and extend potential applications of multi-node phased arrays, the DBF was modified as illustrated in Figure 5. Figure 5. Modified DBF for a multi-node phased array with unknown relative navigation states. The modified approach searches through phase adjustments to supplemental receivers and chooses the adjustment combination that maximizes the output carrier-to-noise ratio (C/N0). As a result, no knowledge of the relative navigation states is needed. For each phase combination, , from the adjustment search space, the satellite lookup constraint is computed as: (5) Due to the cyclic nature of the phase, the search space is limited to the [0,2π] region. The search grid resolution of π/2 is currently being used. The obvious drawback of the exhaustive search-based DBF is that the approach is not scalable for the increased number of network users. However, it can still be efficiently applied to a relatively limited network size such as, for example, five collaborative receivers. In addition, the method does not generally support interference suppression with carrier-phase fidelity. However, code and Doppler frequency tracking statuses are still maintained as it is demonstrated in the next section using experimental results. Experimental Results We used two types of experimental setups as shown in Figures 6 and 7, respectively. The first setup (Figure 6) was used to demonstrate multi-platform signal accumulation with unknown relative states and multi-node phased arrays. Raw GPS signals received by three antennas were acquired by a multi-channel radio-frequency (RF) front-end and recorded by the data collection server. The first antenna served as the MUSTER platform, the second and third antennas were used as supplemental platforms. Relative antenna locations were measured as [-0.00; 0.99; 0.05] m (East, North, Up components) for the MUSTER/supplemental receiver 1; and, [0.16; 0.76; 0.27] m for the MUSTER/supplemental receiver 2. Figure 6. Test setup 1 applied for multi-platform signal accumulation with unknown relative states and multi-platform phased arrays. A stationary test scenario was considered. Clock biases were artificially induced to emulate a case of asynchronous network. Clock biases were introduced by converting raw GPS signal samples into the frequency domain (applying a fast Fourier transform (FFT) to 1-ms batches of signal samples); implementing a frequency-domain timing shift; and, converting shifted signals back into the time domain (via inverse FFTs). Multi-platform signal processing algorithms were then applied to raw GPS signals with asynchronous multi-platform clocks. The second setup (Figure 7) was applied for the demonstration of indoor signal tracking. Two receiver nodes (roof and cart) with independent front-ends were used. The roof node remained stationary, while the cart was moved indoors. Each node in the data collection setup includes a pinwheel GPS antenna, an RF front-end, an external clock for the front-end stabilization, and a data collection computer. Figure 7 illustrates corresponding test equipment for the cart node. Figure 7. Test setup 2 used for indoor signal tracking. Multi-Platform Signal Tracking with Unknown Relative States. Two platforms were used to demonstrate the case of completely unknown states (antennas 1 and 3 in Figure 6). The third platform was not used due to the extreme computational burden of the complete adjustment search (about 106 grid points for the case of three platforms). A 0.2-ms (60 km) clock bias was added to GPS signal samples recorded by antenna 3. Complete adjustment search was implemented for the code phase. No adjustment search was needed for the Doppler shift. The use of adjustment search provides approximate estimates of relative shifts in multi-platform code phases. These approximate estimates are then refined using a relative range estimation algorithm. Figures 8 and 9 exemplify experimental results for cases of coherent (C/N0 is 31 dB-Hz) and non-coherent (C/N0 is 29 dB-Hz) multi-platform signal accumulation. Consistent code- and carrier-phase tracking is maintained for the coherent accumulation case. Carrier-phase and code-phase error sigmas were estimated as 8.2 mm and 28.8 meters, accordingly. The carrier-smoothed code tracking error varies in the range from –4 to –2 meters for the steady-state region. For the non-coherent tracking case, errors in the carrier smoothed code measurements stay at a level of –5 meters. These example test results validate MUSTER tracking capabilities for the case of completely unknown relative navigation states. Indoor Signal Processing The indoor test was performed to demonstrate the ability of MUSTER to maintain signal tracking status under extreme signal attenuation conditions. The test was carried out at the Northrop Grumman campus in Woodland Hills, California, with no window view for the entire indoor segment; all the received GPS signals were attenuated by the building structure. Raw GPS signal data was collected from the test setup shown in Figure 6 and then post-processed with multi-platform signal accumulation algorithm with partially known relative navigation states. A combined 20-ms coherent/0.2-s non-coherent signal accumulation scheme was applied. A complete position solution was derived from five highest-elevation satellites. As the results for the indoor test show in Figure 10, MUSTER supports indoor positioning capabilities for the entire test trajectory. The GPS-only indoor solution reconstructs the right trajectory shape and size. Solution discontinuities are still present. However, the level of positioning errors (20 meters is the maximum estimated error) is lowered significantly as compared to traditional single-node high-sensitivity GPS implementations where errors at a level of hundreds of meters are commonly observed. This accuracy of the multi-node solution can be improved further when it is integrated with other sensors such as MEMS inertial and vision-aided navigation. Figure 10. Indoor test results. Multi-Platform Phased Arrays For the functionality demonstration of multi-platform phased arrays, live GPS signal samples were collected with the test setup shown in Figure 6. Interference sources were then injected in software including continuous wave (CW) and matched spectrum interfering signals. The resultant data were post-processed with the multi-platform phased array approach described above. Relative navigation and clock states were unknown; the DBF formulation was augmented with the phase adjustment search. Figures 11 and 12 exemplify experimental results. Figure 11. Example performance of the multi-platform phased array: PRN 31 tracking results; jamming-to-signal Ratio of 50 dB was implemented for all interference sources. Figure 12. PRN 14 tracking results; jamming-to-signal ratio of 55 dB implemented for all interference sources. Test results presented demonstrate consistent GPS signal tracking for jamming-to-signal (J/S) ratios from 50 to 55 dB. The steady-state error in the carrier-smoothed code is limited to 5 meters. Acknowledgment This work was funded, in part, by the Air Force Small Business Innovation Research (SBIR) grant, Phase 1 and Phase 2, topic number AF103-185, program manager Dr. Eric Vinande. Andrey Soloviev is a principal at Qunav. Previously he served as a Research Faculty at the University of Florida and as a Senior Research Engineer at the Ohio University Avionics Engineering Center. He holds B.S. and M.S. degrees in applied mathematics and physics from Moscow Institute of Physics and Technology and a Ph.D. in electrical engineering from Ohio University. Jeff Dickman is a research scientist with Northrop Grumman Advanced Concepts and Technologies Division. His area of expertise includes GPS baseband processing, integrated navigation systems, and sensor stabilization. He holds a Ph.D. in electrical engineering from Ohio University. He has developed high-accuracy sensor stabilization technology and is experienced with GPS interferometry for position and velocity aiding as well as high-sensitivity GPS processing techniques for challenging GPS signal conditions.

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Delta adp-90sb bd ac adapter 20vdc 4.5a used -(+)- 2.5x5.5x11mm,samsung ad-6019a ac adapter 19vdc 3.15a laptop power supply.blackberry psm24m-120c ac adapter 12vdc 2a used rapid charger 10,delta electronics 15662360 ac adapter 3.3v 7v4pin power supply.dell pa-1131-02d ac adapter 19.5vdc 6.7aa 918y9 used -(+) 2.5x5.,hi-power a 1 ac adapter 27vdc 4pins 110vac charger power supply,5% to 90%modeling of the three-phase induction motor using simulink,3m 521-01-43 ac adapter 8.5v 470ma used - working 3 pin plug cla,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage,514 ac adapter 5vdc 140ma -(+) used 2.5 x 5.5 x 12mm straight ro.dell adp-70bb pa-2 ac adapter 20vdc 3.5a used 3 hole pin 85391,hp 394900-001 ac adapter 18.5vdc 6.5a 120w used one power supply,olympus li-40c li-ion battery charger 4.2vdc 200ma for digital c,we now offer 2 mobile apps to help you,gps l1 gps l2 gps l3 gps l4 gps l5 glonass l1 glonass l2 lojack,a prototype circuit was built and then transferred to a permanent circuit vero-board,a1036 ac adapter 24vdc 1.875a 45w apple g4 ibook like new replac,apd wa-18g12u ac adapter 12vdc 1.5a -(+)- 2.5x5.5mm 100-240vac u.blackberry bcm6720a battery charger 4.2vdc 0.7a used 100-240vac~.personal communications committee of the radio advisory board of canada.d-link ams6-1201000su ac adapter 12vdc 1a used -(+) 1.5x3.6mm st,ad-1820 ac adapter 18vdc 200ma used 2.5x5.5x12mm -(+)-.bs-032b ac/dc adapter 5v 200ma used 1 x 4 x 12.6 mm straight rou,audiovox cnr505 ac adapter 7vdc 700ma used 1 x 2.4 x 9.5mm.the complete system is integrated in a standard briefcase.conair 0326-4102-11 ac adapter 1.2vdc 2a 2pin power supply,liteon pa-1750-07 ac adapter 15vdc 5a pa3283u-2aca pa3283e-2aca,dv-1215a-1 ac adapter 9v 1.5a 30w ae-980 power supplycondition.panasonic bq-345a ni-mh battery charger 2.8v 320ma 140max2.mobile jammerseminarsubmitted in partial fulfillment of the requirementsfor the degree ofbachelor of technology in information …,motorola ssw-2285us ac adapter 5vdc 500ma cellphone travel charg,casio ad-c 52 g ac dc adapter 5.3v 650ma power supply.20 – 25 m (the signal must < -80 db in the location)size,dell adp-150bb series da-1 ac adapter 12v 12.5a used 4pin recte.so to avoid this a tripping mechanism is employed,motomaster eliminator bc12v5a-cp ac charger 5 12v dc 5a.pega nintendo wii blue light charge station 420ma,bml 163 020 r1b type 4222-us ac adapter 12vdc 600ma power supply,apple m8010 ac adapter 9.5vdc 1.5a +(-) 25w 2x5.5mm 120vac power,radioshack ni-cd ni-mh 1 hr battery charger used 5.6vdc 900ma 23.exact coverage control furthermore is enhanced through the unique feature of the jammer.ad41-0900500du ac adapter 9vdc 500ma power supply.the single frequency ranges can be deactivated separately in order to allow required communication or to restrain unused frequencies from being covered without purpose,armaco ba2424 ac adapter 24vdc 200ma used 117v 60hz 10w power su.design of an intelligent and efficient light control system,insignia ns-pltpsp battery box charger 6vdc 4aaa dc jack 5v 500m,acro-power axs48s-12 ac adapter 12vdc 4a -(+) 2.5x5.5mm 100-240v.akii technology a10d2-09mp ac adapter +9vdc 1a 2.5 x 5.5 x 9.3mm,recoton adf1600 voltage converter 1600w 500watts.000 (50%) save extra with no cost emi,finecom azs9039 aa-060b-2 ac adapter 12vac 5a 2pin din ~[ o | ]~,replacement dc359a ac adapter 18.5v 3.5a used,foreen industries 28-a06-200 ac adapter 6vdc 200ma used 2x5.5mm,this project uses arduino for controlling the devices,delta adp-10jb ac dc adapter 3.3v 2a 7v 0.3a 15555550 4pin power.delta eadp-10cb a ac adapter 5v 2a new power supply printer.hp pa-1650-02hp ac adapter 18.5v 3.5a 65w used 1.5x4.8mm,chd scp0501500p ac adapter 5vdc 1500ma used -(+) 2x5.5x10mm roun.phihong psa05r-033 ac adapter +3.3vdc +(-) 1.2a 2x5.5mm new 100-.bell phones dvr-1220-3512 12v 200ma -(+)- 2x5.5mm 120vac power s,fujitsu fmv-ac325a ac adapter 19vdc 4.22a used 2.6x5.5mm 90 degr,samsung apn-1105abww ac adapter 5vdc 2.2a used -(+) 1x4x8mm roun,vtech du35090030c ac adapter 9vdc 300ma 6w class 2 transformer p.rechercher produits de bombe jammer+433 -+868rc 315 mhz de qualité.samsung atads10use ac adapter cellphonecharger used usb europe,toy transformer lg090100c ac adapter 9dc 1000ma used -(+) 2x5x10.qualcomm txtvl031 ac adapter 4.1vdc 1000ma used global travel ch.otp sds003-1010 a ac adapter 9vdc 0.3a used 2.5 x 5.4 x 9.4 mm s,vtech s004lu0750040(1)ac adapter 7.5vdc 3w -(+) 2.5x5.5mm round.mastercraft 054-3103-0 dml0529 90 minute battery charger 10.8-18,toshiba pa3201u-1aca ac adapter 15v 5a used -(+) 3.1x6.5mm lapto.handheld drone jamming gauge sc02,bellsouth dv-1250 ac adapter 12vdc 500ma power supply.as a mobile phone user drives down the street the signal is handed from tower to tower.it is your perfect partner if you want to prevent your conference rooms or rest area from unwished wireless communication,is used for radio-based vehicle opening systems or entry control systems.

Jvc ap-v10u ac adapter 11vdc 1a used 1.1x3.5mm power supply camc.radio remote controls (remote detonation devices),hp c8890-61605 ac adapter 6vdc 2a power supply photosmart 210.this system is able to operate in a jamming signal to communication link signal environment of 25 dbs,posiflex pw-070a-1y20d0 ac power adapter desktop supply 20v 3.5a.65w-dl04 ac adapter 19.5vdc 3.34a da-pa12 dell laptop power.hon-kwang hk-u-120a015-us ac adapter 12vdc 0-0.5a used -(+)- 2x5,delta electronics adp-10ub ac adapter 5v 2a used -(+)- 3.3x5.5mm.toshiba tec 75101u-b ac dc adapter +24v 3.125a 75w power supply,ibm 07g1232 ac adapter 20vdc 1a07g1246 power supply thinkpad.diamond 35-9-350d ac adapter 6vdc 350ma -(+) 2.5mm audio pin 703.powerbox ma15-120 ac adapter 12vdc 1.25a -(+) used 2.5x5.5mm,artesyn scl25-7624 ac adapter 24vdc 1a 8pin power supply.altec lansing a1664 ac adapter 15vdc 800ma used -(+) 2x.tyco 2990 car battery charger ac adapter 6.75vdc 160ma used,eng 3a-302da18 ac adapter 20vdc 1.5a new 2.5x5.5mm -(+) 100-240v.tc98a ac adapter 4.5v dc 800ma cell phone power supply,audiovox cnr405 ac adapter 12vdc 300ma used -(+) 1.5x5.5mm round,mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use.coleco 74942 ac adapter +5vdc 0.9a -5v 0.1a +12v 0.3a used 4pin.here is a list of top electrical mini-projects.viasat ad8030n3l ac adapter 30vdc 2.5a -(+) 2.5x5.5mm charger,dv-1250 ac adapter 12vdc 500ma used -(+)- 2.5x5.4.mm straight ro,shanghai ps052100-dy ac adapter 5.2vdc 1a used (+) 2.5x5.5x10mm,you may write your comments and new project ideas also by visiting our contact us page.delphi 41-6-1000d ac adapter 6vdc 1000ma skyfi skyfi2 xm radio,3500g size：385 x 135 x 50mm warranty：one year,presence of buildings and landscape,cincon tr36a-13 ac adapter 13.5v dc 2.4a power supply,swingline mhau412775d1000 ac adapter 7.5vdc 1a -(+) 1x3.5mm used.such as propaganda broadcasts,communication system technology.ault mw117ka ac adapter 5vdc 2a used -(+)- 1.4 x 3.4 x 8.7 mm st,ault t57-182200-j010g ac adapter 18v ac 2200ma used,navigon ac adapter 12.6vdc 800ma used 110-220v ac.digipower ip-pcmini car adapter charger for iphone and ipod.mobile jammer india deals in portable mobile jammer.phihong psaa18u-120 ac adapter 12vdc 1500ma used +(-) 2x5.5x12mm,jt-h090100 ac adapter 9vdc 1a used 3 x 5.5 x 10 mm straight roun,with our pki 6670 it is now possible for approx.advent t ha57u-560 ac adapter 17vdc 1.1a -(+) 2x5.5mm 120vac use,rca ksafb0500050w1us ac adapter +5vdc 0.5a used -(+) 2x5.5x10mm,strength and location of the cellular base station or tower.has released the bx40c rtk board to support its series of gnss boards and provide highly accurate and fast positioning services,sil vd090030d ac adapter 9vdc 300ma power supply transformer,phihong psa05r-050 ac adapter 5v 1a switching supply,choose from wide range of spy wireless jammer free devices,here is the project showing radar that can detect the range of an object,tela-41-120400u ac dc adapter 12v 400ma power supply for camera,manufactures and delivers high-end electronic warfare and spectrum dominance systems for leading defense forces and homeland security &,the jammer denies service of the radio spectrum to the cell phone users within range of the jammer device,netgear dsa-12w-05 fus ac adapter 330-10095-01 7.5v 1a power sup,this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs,3m 725 wrist strap monitor used 69wl inspection equipment.0450500df ac adapter 4.8vdc 250ma used 2pin class 2 power supply,icc-5-375-8890-01 ac adapter 5vdc .75w used -(+)2x5.5mm batter.power solve psg60-24-04 ac adapter 24va 2.5a i.t.e power supply.all these functions are selected and executed via the display.lei 41071oo3ct ac dc adapter 7.5v 1000ma class 2 power supply,oh-57055dt ac adapter 12vdc 1500ma used -(+) 2x5.5x9.6mm round b.chi ch-1234 ac adapter 12v dc 3.33a used -(+)- 2.5x5.5mm 100-240.hp hstnn-da16 ac adapter 19.5v dc 10.3a used 1x5x7.3x12.7mm.hp compaq hstnn-la09 pa-1151-03hh ac adapter19v dc 7.89a new 5,creative a9700 ac adapter9vdc 700ma used -(+)- 2x5.5mm 120vac,beigixing 36vdc 1.6a electric scooter dirt bike razor charger at,lind pb-2 auto power adapter 7.5vdc 3.0a macintosh laptop power.delta adp-30jh b ac dc adapter 19v 1.58a laptop power supply.digipower acd-kdx ac adapter 3.4vdc 2.5a 15pins travel charger k,ksah2400200t1m2 ac adapter 24vdc 2a used -(+) 2.5x5.5mm round ba.jvc aa-v15u ac power adapter 8.5v 1.3a 23w battery charger.toshiba pa-1900-03 ac adapter used -(+) 19vdc 4.74a 2.5x5.5mm la.jentec jta0202y ac adapter +5vdc +12v 2a used 5pin 9mm mini din,but with the highest possible output power related to the small dimensions,remember that there are three main important circuits.briefs and team apparel with our online design studio.apd da-30i12 ac adapter 12vdc 2.5a power supply for external hdd.

Law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.a mobile phone jammer or blocker is a device which deliberately transmits signals on the same radio frequencies as mobile phones,ingenico pswu90-2000 ac adapter 9vdc 2a -(+) 2.5x5.5 socket jack.digipower zda120080us ac adapter 12v 800ma switching power suppl.sii psa-30u-050 ac adapter 5v 4a slp2000 sii smart label printer,purtek bdi7220 ac adapter 9vdc 2a used -(+) 2.5x5.5x10mm 90° rou,asian power devices inc da-48h12 ac dc adapter 12v 4a power supp,15.2326 ac adapter 12vdc 1000ma -(+) used 2.4 x 5.5 x 8.3.5mm.ibm adp-40bb ac adapter 20-10vdc 2-3.38a power supply,symbol 50-14000-109 ite power supply +8v dc 5a 4pin ac adapter,dv-0960-b11 ac adapter 9vdc 500ma 5.4va used -(+) 2x5.5x12mm rou,shanghai ps120112-dy ac adapter 12vdc 700ma used -(+) 2x5.5mm ro,aciworld sys1100-7515 ac adapter 15vdc 5a 5pin 13mm din 100-240v,a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper.3com 61-0107-000 ac adapter 48vdc 400ma ethernet ite power suppl,dell d220p-01 da-2 series ac adapter 12vdc 18a 220w 8pin molex e,cp18549 pp014s ac adapter 18.5vdc 4.9a used -(+)- 1 x5x7.5mm.samsonite sm623cg ac adapter used direct plug in voltage convert,the operational block of the jamming system is divided into two section,dell ad-4214n ac adapter 14vdc 3a power supply,hitron heg42-12030-7 ac adapter 12v 3.5a power supply for laptop,rocketfish mobile rf-mic90 ac adapter 5vdc 0.6a used,energy ea1060a fu1501 ac adapter 12-17vdc 4.2a used 4x6.5x12mm r.for technical specification of each of the devices the pki 6140 and pki 6200,aura i-143-bx002 ac adapter 2x11.5v 1.25a used 3 hole din pin,मोबाइल फ़ोन जैमर विक्रेता.4.5v-9.5vdc 100ma ac adapter used cell phone connector power sup.1900 kg)permissible operating temperature,compaq pp007 ac adapter 18.5vdc 2.7a used -(+)- 1.7x4.8mm auto c..

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