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By Thorsten Lück, Günter Heinrichs, IFEN GmbH, and Achim Hornbostel, German Aerospace Center This article discusses the GALANT adaptively steered antenna array and receiver and demonstrates the test scenarios generated with the GNSS simulator. Exemplary results of different static and dynamic test scenarios are presented, demonstrating the attitude determination capabilities as well as the interference detection and mitigation capabilities. The vulnerability of GNSS to radio frequency interference and spoofing has become more and more of a concern for navigation applications requiring a high level of accuracy and reliability, for example, safety of life applications in aviation, railway, and maritime environments.In addition to pure power jamming with continuous wave (CW), noise or chirp signals, cases of intentional or unintentional spoofing with wrong GNSS signals have also been reported. Hardware simulations with GNSS constellation signal generators enable the investigation of the impact of radio interference and spoofing on GNSS receivers in a systematic, parameterized and repeatable way. The behavior of different receivers and receiver algorithms for detection and mitigation can be analyzed in dependence on interference power, distance of spoofers, and other parameters. This article gives examples of realistic and advanced simulation scenarios, set up for simulation of several user antennas simultaneously. The professional-grade high-end satellite navigation testing and R&D device used here is powerful, easy to use, and fully capable of multi-constellation / multi-frequency GNSS simulations for safety-of-life, spatial and professional applications. It provides all L-band frequencies for GPS, GLONASS, Galileo, BeiDou, QZSS, SBAS and beyond in one box simultaneously. It avoids the extra complexity and cost of using additional signal generators or intricate architectures involving several hardware boxes, and offers full control of scenario generation. A multi-RF capable version provides up to four independent RF outputs and a master RF output that combines the RF signal of each of the up to four individual RF outputs. Each individual RF output is connected to one or more “Merlin” modules (the core signal generator module for one single carrier) allowing simulation of up to 12 satellites per module. Because of the flexible design of the Merlin module, each one can be configured to any of the supported L-band frequencies. As one chassis supports up to nine individual Merlin modules, different Multi-RF combinations are feasible: two RF outputs with up to four modules each three RF outputs with up to three modules each four RF outputs with up to two modules each. With these configurations, the user can simulate different static or dynamic receivers or even one receiver with multiple antennas, covering such challenging scenarios as ground networks, formation flying or use of beam-forming antennas. As the user is free to assign each individual module to a dedicated simulated antenna, the user could also employ up to nine modules to simulate nine different carrier signals for one single antenna using the master RF output, thus simulating the complete frequency spectrum for all current available GNSS systems in one single simulation. All modules are calibrated to garantee a carrier phase coherency of better than ±0.5°. Figure 1 shows the output at the RF master of two modules assigned to the same carrier but with a phase offset of 180°. Figure 1. Carrier-phase alignment of the high-end simulator with six modules compared to the first module. Theoretically, the resulting signal should be zero because of the destructive interference. In practice, a small residual signal remains because of component tolerance, small amplitude differences and other influences. Nevertheless the best cancellation can be seen at this point. The phase accuracy can now simply be estimated from the measured power level of the residual signal:   (1)  (2) with This means that the sum of two sine waves with the same frequency gives another sine wave. It has again the same frequency, but a phase offset and its amplitude is changed by the factor A. The factor A does affect the power level. If φ is 180° then A is 0, which means complete cancellation. So A shows the power of the resulting signal relative to the single sine wave. It can also be transformed to dB:  (3) Figure 2 shows the carrier suppression as a function of carrier phase offset with a pole at 180ϒ. Figure 2. Carrier suppresion as a function of phase delay. The factory calibration aligns the modules to a maximum of 0.5ϒ misalignment. The measured suppresion therefore shall be better than 41.18 dBc. In practice, the residual signal is also caused by other influences, so that the actual phase alignment can be expected to be much better. With four RF outputs, the received signal of a four element antenna can be configured very easily. Figure 3 shows the dialog to configure a four-element antenna with the geometry shown in Figure 4. Note that the antenna elements are configured in the body-fixed system with the x-axis to front and the y-axis to the right (inline with a north-east-down, NED, system when facing to north), while the geometry shown in Figure 4 follows an east-north-up (ENU) convention. Figure 3. Configuration of individual antennas per receiver. Figure 4. Geometry of the GALANT four-element phased-array antenna (view from top). The following sections give an overview of multi-antenna systems and discuss results from a measurement campaign of the German Aerospace Center (DLR) utilizing the simulator and the DLR GALileo ANTenna array (GALANT) four-element multi-antenna receiver. Multi-Antenna Receivers Multi-antenna receivers utilize an antenna array with a number of antenna elements. The signals of each antenna element are mixed down and converted from analog to digital for baseband processing. In the baseband, the signals received by the different antenna elements are multiplied with complex weighting factors and summed. The weighting factors are chosen in such a way that the received signals from each antenna element cancel out into the direction of the interferers (nulling) and additionally, for advanced digital beamforming, such that the gain is increased into the direction of the satellites by forming of individual beams to each satellite. Because all these methods work with carrier phases, it is important that in the simulation setup, the signals contain the correct carrier phases at the RF-outputs of the simulator corresponding to the user satellite and user-interferer geometry, and the position and attitude of the simulated array antenna. Figure 5 presents the geometry of a rectangular antenna array with 2×2 elements and a signal s(t) impinging from direction (ϕ, θ). Figure 5. Parallel wavefront impinging on a rectangular array with 2×2 elements. The spacings of the elements dx, dy are typically half a wavelength, but can also be less. The range difference for antenna element i relative to the reference element in the center of the coordinate system depends on the incident direction (ϕ, θ) and the position (m=0,1, n=0,1) of the element within the array:  (4) The corresponding carrier phase shift is:  (5) For CRPA and adaptive beam forming applications, the differential code delays may be neglected if they are small compared to the code chip length. However, it is essential that the carrier phase differences are precisely simulated, because they contain the information about the incident direction of the signal and are the basis for the array processing in the receiver. For instance, the receiver can estimate the directions of arrival of the incident signals from these carrier phase differences. Now we consider a 2×2 array antenna. It can be simulated with the simulator with four RF outputs, where each output corresponds to one antenna element. In the simulator control software, a user with four antennas is set up, where the position of each antenna element is defined as an antenna position offset relative to the user position. In this approach, both differential code and carrier delays due to the simulated array geometry are taken into account, because the code and carrier pseudoranges are computed by the simulator for the position of each antenna element. However, the RF hardware channels of the receiver front-end may have differential delays against each other, which may even vary with time. If the direction of the satellites and interferers shall be estimated correctly by the receiver algorithms, a calibration signal is required to measure and compensate these differential hardware delays. For the real antenna system, a binary phase-shift keying (BPSK) signal with zero delay for each antenna channel is generated by the array receiver and fed into the antenna calibration port. For the simulation, this calibration signal must also be generated by the constellation simulator. In a simple way, a satellite in the zenith of the user antenna can be simulated, which has the same distance and delay to all antenna elements. Unfortunately, this simple solution includes some limitations to the simulated position and attitude of the user, because the user position must be at the Equator (if a “real” satellite is simulated in form of a geostationary satellite) and the antenna must not be tilted. With a small customization of the simulator software, these limitations could be overcome. Figure 6 shows how to set up the generation of a reference signal. This reference signal can either be simulated as a transmitter directly above the user position, which follows the user position and thus allows also simulations offside the Equator, or simulated as a zero-range signal on all RF outputs, neglecting any geometry, which is the preferred method. The latter one is more or less identical to the reference/calibration signal generated by the receiver itself. Figure 6. Configuration of a modulated reference signal. The power level of this signal is held constant and is not affected by any propagation delay or attenuation simulated by the control center. Attitude Determination According to Figure 5, the phase difference measured between antenna elements is a function of the direction of arrival (DoA). Thus, the DoAs of the incident signals can be estimated from the phase differences. In the GALANT receiver, the DoAs are estimated by an EPSPRIT algorithm after correlation of the signals. Compared with the (known) positions of the GNSS satellites, this allows the estimation of the antenna array attitude. Figure 7 shows the sky-plot of simulated satellites as seen at receiver location (simulated on the right; reconstructed by the receiver from the decoded almanac in the middle and the DoA on the left). By comparison of the estimated DoAs of all satellites and the skyplot from the almanac, the attitude of the antenna is estimated (left). In addition, the attitude angles simulated by the simulator is given (right). Figure 7. Simulating and estimating attitude with a multi-element antenna. Simulation of Interference It is possible to simulate some simple types of interference. Possible interference scenarios are: Wideband Noise. By increasing the power of a single satellite of the same or another GNSS constellation, a wideband pseudo-noise signal can be generated. Using a geostationary satellite also enables simulating an interference source at low elevations and constant position. Use of power-level files also allow generation of scenarios with intermittent interference (switching on and off the interference) with switching rates up to 5 Hz. CW or Multi-Carrier IF. By disabling the spreading code and navigation message, a CW signal can be generated. The simulator also allows configuration of subcarrier modulations. Without spreading code (or to be precise with a spreading code of constant zero) the generated signal will consist of two carriers symmetrically around the original signal carrier (for example, configuring a BOC(1,1) signal will create two CW signals at 1.57542 GHz ± 1.023 MHz, thus producing “ideal” interferer for the Galileo E1 OS signal.) Depending on the number of Merlin modules per RF output, interference to signal ratios up to 80 dB could be realized, limited by a dynamic range of 40 dB within one module and additional 40 dB range between two modules. However, the maximum power level of one individual signal is currently limited to -90 dBm. If only one channel per module is used, the maximum power level of this single signal can be increased by another 18 dB (for example, by using one module solely for interference generation and another module for GNSS simulation). Figure 8 shows the simulated geometry for an interference scenario based on wideband noise generated by a geostationary satellite, producing –90 dBm signal power at the receiver front end. The interference source is very near to the direction of PRN 22 with a jammer power of –90 dBm, resulting in a jammer to signal ratio of J/S = 25 dB. Figure 8. Geometry for the wideband noise interference scenario. Figure 9 shows the two-dimensional antenna pattern as a result of the beam-forming before and after switching on the interferer. The mitigation algorithm tries to minimize gain into the direction of the interferer. As this also decreases gain into the direction of the intended satellite, the C/N0 drops by approximately 10 dB for PRN 22, because its main beam is shifted away from the interference direction. For satellites in other directions, the decrease in C/N0 is less: compare Figure 9 with Figure 10. However, the receiver still keeps tracking the satellite. After switching of beamforming, the signal is lost. Figure 9. Beamforming for PRN 22 (light green line in lower plot) to mitigate for interference. Figure 10. Tracking is lost after switching off beamforming for individual channels (light blue, purple) and all channels (at the end of the plot). Simulation of Spoofing The simulation of a spoofing signal requires twice the resources as the real-world scenario, as every “real” LoS-signal must also be generated for the spoofing source. A simulation of an intentional spoofer who aims to spoof a dedicated position in this context is, however, very similiar to the simulation of a repeater ([un-]intentional interferer) device: The repeater (re-)transmits the RF signal received at its receiver position. A receiver tracking this signal will generate the position of the repeater location but will observe an additional local clock error defined by the processing time within the repeater and the travel time between repeater and receiver position. A correct simulation for a multi-antenna receiver therefore has to superpose the code and carrier range as observed at the repeater location (considering geometric range between the transmit antenna of the repeater and the individual antenna elements) with the code and carrier ranges at the receiver location. Instead of the location of the repeater P2, however, any intended location Px could be used to simulate an intelligent spoofer attack (Figure 11). The simulator can generate such scenarios by configuring the position of the (re-)transmitting antenna and the intended position (for example, the position of the repeater). By calculating the difference between the real receiver position and the position of the transmitting antenna, the additional delay and free-space loss can be taken into account. The user may also configure the gain of the transmit antenna and the processing time within the repeater. Currently, this setup does only support one “user” antenna to be simulated. However, this feature combined with multi-antenna support will enable the simulator to simulate repeater or intelligent spoofer attacks in the future (Figure 12). To distinguish the “real” signal from the “repeated” signal, the “repeated” signal could be tagged as a multipath signal. This approach would allow simulation of the complete environment of “real” and “repeated” GNSS signals in one single simulator. Figure 11. Geometry of repeater/spoofer and GNSS receiver. Figure 12. Simulator’s capability to simulate a repeater. Manufacturers The simulator producing the results described here is the NavX-NCS from IFEN GmbH. The simulator is valuable laboratory equipment for testing not only standard or high-end single-antenna GNSS receivers, but also offers additional benefit for multi-antenna GNSS receivers like the DLR GALANT controlled reception pattern antenna system. The GNSS constellation simulator offers up to four phase-coherent RF outputs, allowing the simulation of four antenna elements with two carrier frequencies, each utilizing one single chassis being 19 inch wide and 2 HU high. Simulation of intentional and unintentional interference is a possible feature of the simulator and allows receiver designers and algorithm developers to test and enhance their applications in the presence of interference to identify, locate and mitigate for interference sources. Thorsten Lück studied electrical engineering at the universities in Stuttgart and Bochum. He received a Ph.D. (Dr.- Ing.) from the University of the Federal Armed Forces in Munich in 2007 on INS/GNSS integration for rail applications. Since 2003, he has worked for IFEN GmbH, where he started as head of R&D embedded systems in the receiver technology division. In 2012 he changed from receiver development to simulator technologies as product manager of IFEN’s professional GNSS simulator series NavX-NCS and head of the navigation products department. Günter Heinrichs is the head of the Customer Applications Department and business development at IFEN GmbH, Poing, Germany.  He received a Dipl.-Ing. degree in communications engineering in 1988, a Dipl.- Ing. degree in data processing engineering and a Dr.-Ing. degree in electrical engineering in 1991 and 1995, respectively. In 1996 he joined the satellite navigation department of MAN Technologie AG in Augsburg, Germany, where he was responsible for system architectures and design, digital signals, and data processing of satellite navigation receiver systems. From 1999 to April 2002 he served as head and R&D manager of MAN Technologie’s satellite navigation department. Achim Hornbostel joined the German Aerospace Center (DLR) in 1989 after he received his engineer diploma in electrical engineering from the University of Hannover in the same year. Since 2000, he has been a staff member of the Institute of Communications and Navigation at DLR. He was involved in several projects for remote sensing, satellite communications and satellite navigation.  In 1995 he received his Ph.D. in electrical engineering from the University of Hannover. His main activities are in receiver development, interference mitigation and signal propagation.

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Dsc-31fl us 52050 ac adapter +5.2vdc 0.5a power supply,nokia acp-9u ac adapter 6.2v 720ma new 1.2 x 3.4 x 7.7mm round,kinetronics sc102ta2400f01 ac adapter 24vdc 0.75a used 6pin 9mm,radioshack ni-cd ni-mh 1 hr battery charger used 5.6vdc 900ma 23,finecom ah-v420u ac adapter 12v 2.5a power supply,direct plug-in sa48-18a ac adapter 9vdc 1000ma power supply,sin chan sw12-050u ac adapter 5vdc 2a switching power supply wal,it can be placed in car-parks.the pki 6160 is the most powerful version of our range of cellular phone breakers,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.coleman cs-1203500 ac adapter 12vdc 3.5a used -(+) 2x5.5x10mm ro.people also like using jammers because they give an “out of service” message instead of a “phone is off” message.liteon pa-1750-11 ac adapter -(+)- 19vdc 4a used 2.7x5.4mm,asante ad-121200au ac adapter 12vac 1.25a used 1.9 x 5.5 x 9.8mm.ibm lenovo 92p1020 ac adapter 16vdc 4.5a used 2.5x5.5mm round ba.ac/dc adapter 5v 1a dc 5-4.28a used 1.7 x 4 x 12.6 mm 90 degree,sun pscv560101a ac adapter 14vdc 4a used -(+) 1x4.4x6mm samsung,micro controller based ac power controller,replacement pa-1700-02 ac adapter 20vdc 4.5a used straight round.casio ad-a60024ac adapter 6vdc 240ma used -(+) 2x5.5mm round b,ac19v3.16-hpq ac adapter 19vdc 3.16a 60w power supply,offers refill reminders and pickup notifications.apx sp7970 ac adapter 5vdc 5a 12v 2a -12v 0.8a 5pin din 13mm mal,targus pa104u ac power inverter used auto air charger dell 12vdc,ac adapter 30vac 500ma ~(~) telephone equipment i.t.e. power sup,condor ps146 100-0086-001b ac adapter 17vctac 0.7a used 4pin atx.our pharmacy app lets you refill prescriptions.laptopsinternational lse0202c1990 ac adapter 19vdc 4.74a used.transmission of data using power line carrier communication system,irwin nikko dpx351355 ac adapter 5.8vdc 120ma 2.5v 2pin 4 hour,“1” is added to the fault counter (red badge) on the hub icon in the ajax app,long-gun registry on the chopping block.eps f10903-0 ac adapter 12vdc 6.6a used -(+)- 2.5x5.5mm 100-240v.motorola 35048035-a1 ac adapter 4.8vdc 350ma spn4681c used cell,compaq 2844 series auto adapter 18.5vdc 2.2a 30w used 2.5x6.5x15.the light intensity of the room is measured by the ldr sensor.

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Kodak easyshare camera dock ii cx4200 series with 7v ac adapter,spi sp036-rac ac adapter 12vdc 3a used 1.8x4.8mm 90° -(+)- 100-2.microtip photovac e.o.s 5558 battery charger 16.7vdc 520ma class.black & decker vp131 battery charger used 4.35vdc 220ma 497460-0,2 w output powerwifi 2400 – 2485 mhz.jvc aa-v3u camcorder battery charger,union east ace024a-12 12v 2a ac adapter switching power supply 0,nokia ac-3x ac adapter cell phone charger 5.0v 350ma euorope ver,delhi along with their contact details &.dv-241a5 ac adapter 24v ac 1.5a power supply class 2 transformer,310mhz 315mhz 390mhz 418mhz 433mhz 434mhz 868mhz.kenwood w08-0657 ac adapter 4.5vdc 600ma used -(+) 1.5x4x9mm 90°.psp electronic sam-pspeaa(n) ac adapter 5vdc 2a used -(+) 1.5x4x,load shedding is the process in which electric utilities reduce the load when the demand for electricity exceeds the limit,impediment of undetected or unauthorised information exchanges.a spatial diversity setting would be preferred,the next code is never directly repeated by the transmitter in order to complicate replay attacks,hp f1044b ac adapter 12vdc 3.3a adp-40cb power supply hp omnibo.band selection and low battery warning led,sony vgp-ac19v10 ac dc adapter 19.5v 4.7a power supply adp-90yb.this circuit analysis is simple and easy.belkin f5d4076-s v1 powerline network adapter 1 port used 100-12.desk-top rps571129g +5v +12v -12v dc 1a 0.25a 25w power supply f,you can clearly observe the data by displaying the screen,metrologic 3a-052wp05 ac adapter 5-5.2v 1a - ---c--- + used90,a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper.compaq pe2004 ac adapter 15v 2.6a used 2.1 x 5 x 11 mm 90 degree,sanyo ad-177 ac adapter 12vdc 200ma used +(-) 2x5.5mm 90° round.lenovo 92p1160 ac adapter 20v 3.25a power supply 65w for z60,viasat ad8530n3l ac adapter 30vdc 2.7a -(+) 2.5x5.5mm charger fo,philips hq 8000 ac adapterused charger shaver 100-240v 50/6.plantronics su50018 ac adapter 5vdc 180ma used 0.5 x 3 x 3.1mm.eng 3a-041w05a ac adapter 5vdc 1a used -(+)- 1.5 x 3.4 x 10 mm s.motorola psm4841b ac adapter 5.9vdc 350ma cellphone charger like.dve dsa-0131f-12 us 12 ac adapter 12vdc 1a 2.1mm center positive,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications.

Wang wh-501ec ac adapter 12vac 50w 8.3v 30w used 3 pin power sup,m2297p ac car adapter phone charger used 0.6x3.1x7.9cm 90°right.condor 48-12-1200 ac adapter 12vdc 1200ma used 2.5x5.5x11.4mm,once i turned on the circuit,the scope of this paper is to implement data communication using existing power lines in the vicinity with the help of x10 modules.this task is much more complex.condor hk-b520-a05 ac adapter 5vdc 4a used -(+)- 1.2x3.5mm,brushless dc motor speed control using microcontroller,lg sta-p53wr ac adapter 5.6v 0.4a direct plug in poweer supply c,mobile / cell phone jammer/blocker schematic diagram circu,compaq 2932a ac adapter 5vdc 1500ma used 1 x 4 x 9.5mm.ktec ksas0241200200hu ac adapter 12vdc 2a -(+)- 2x5.5mm switchin,cell phone scanner jammer presentation.cwt pa-a060f ac adapter 12v 5a 60w power supply,it can be configured by using given command.toshiba pa2500u ac adapter 15v 2a used 3.1 x 6.5 x 9.8mm 90 degr.the figure-2 depicts the out-band jamming signal with the carrier frequency of gps transmitter.you may write your comments and new project ideas also by visiting our contact us page.this multi-carrier solution offers up to ….delta eadp-36kb a ac adapter 12vdc 3a used -(+) 2.5x5.5mm round,ad1250-7sa ac adapter 12vdc 500ma -(+) 2.3x5.5mm 18w charger120,conair u090015a12 ac adapter 9vac 150ma linear power supply,disrupting a cell phone is the same as jamming any type of radio communication,a1036 ac adapter 24vdc 1.875a 45w apple g4 ibook like new replac.hp 384020-002 compaq ac adapter 19vdc 4.74a laptop power supply,fisher price pa-0610-dva ac adapter 6vdc 100ma power supply,ridgid r86049 12vdc battery charger for drill impact driver cord,icarly ac adapter used car charger viacom international inc.ault symbol sw107ka0552f01 ac adapter 5vdc 2a power supply,hp pa-1650-32ht ac adapter 18.5v 3.5a ppp009l-e series 65w 60842.yhi 001-242000-tf ac adapter 24vdc 2a new without package -(+)-.hp pavilion dv9000 ac dc adapter 19v 4.74a power supply notebook,rona 5103-14-0(uc) adapter 17.4v dc 1.45a 25va used battery char,black&decker ua-090020 ac adapter 9vac 200ma 5w charger class 2,3com 61-0107-000 ac adapter 48vdc 400ma ethernet ite power suppl,hp 394900-001 ac adapter 18.5vdc 6.5a 120w used one power supply.

For such a case you can use the pki 6660,motorola fmp5049a travel charger 4.4v 1.5a,mascot type 9940 ac adapter 29.5v 1.3a used 3 step charger,canon cb-2ls battery charger 4.2v dc 0.5a used digital camera s1,u075015a12v ac adapter 7.5vac 150ma used ~(~) 2x5.5x10mm 90 degr,371415-11 ac adapter 13vdc 260ma used -(+) 2x5.5mm 120vac 90° de,fujitsu computers siemens adp-90sb ad ac adapter 20vdc 4.5a used.delta eadp-50db b ac adapter 12vdc 4.16a used 3 x 5.5 x 9.6mm,therefore it is an essential tool for every related government department and should not be missing in any of such services,bomb threats or when military action is underway,toshiba adpv16 ac dc adapter 12v 3a power supply for dvd player.a piezo sensor is used for touch sensing.ibm 02k6543 ac adapter 16vdc 3.36a used -(+) 2.5x5.5mm 02k6553 n.we only describe it as command code here.asus ad59230 ac adapter 9.5vdc 2.315a laptop power supply.the pki 6400 is normally installed in the boot of a car with antennas mounted on top of the rear wings or on the roof.pv ad7112a ac adapter 5.2v 500ma switching power supply for palm,wahl dhs-24,26,28,29,35 heat-spy ac adapter dc 7.5v 100ma,and it does not matter whether it is triggered by radio.th 5vdc 11v used travel charger power supply 90-250vac phone.i adaptor ac adapter 24vdc 1.9a 2 century cia2/g3 i.t.e power su,minolta ac-a10 vfk-970b1 ac adapter 9vdc 0.7a 2x5.5mm +(-) new 1,new bright aa85201661 ac adapter 9.6v nimh used battery charger,churches and mosques as well as lecture halls,delta adp-50hh ac adapter 19vdc 2.64a used -(+)- 3x5.5mm power s,gsm channel jamming can only be successful if the gsm signal strength is weak,if there is any fault in the brake red led glows and the buzzer does not produce any sound.toy transformer ud4818140040tc ac adapter 14vdc 400ma 5.6w used,cui 3a-501dn09 ac adapter 9v dc 5a used 2 x 5.5 x 12mm.this sets the time for which the load is to be switched on/off,superpower dv-91a-1 ac adapter 9vdc 650ma used 3 pin molex direc.ahead add-1351800 ac dc adapter 13.5v 1800ma 42.4w power supply.kodak adp-15tb ac adapter 7vdc 2.1a used -(+) 1.7x4.7mm round ba,panasonic cf-vcbtb1u ac adapter 12.6v 2.5a used 2.1x5.5 x9.6mm.audiovox trc-700a cell phone battery charger used 6v 135ma btr-7.ault t22-0509-001t03 ac adapter 9vac 0.5a us robotics used ~(~).

2 to 30v with 1 ampere of current.dve dsa-31fus 6550 ac adapter +6.5vdc 0.5a used -(+) 1x3.5x8.3mm,.

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