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Photo: Galileo Analysis of new Galileo signals at an experimental ground-based augmentation system (GBAS) compares noise and multipath in their performance to GPS L1 and L5. Raw noise and multipath level of the Galileo signals is shown to be smaller than those of GPS. Even after smoothing, Galileo signals perform somewhat better than GPS and are less sensitive to the smoothing time constant.  By Mihaela-Simona Circiu, Michael Felux, German Aerospace Center (DLR), and Sam Pullen, Stanford University Several ground-based augmentation system (GBAS) stations have become operational in recent years and are used on a regular basis for approach guidance. These include airports at Sydney, Malaga, Frankfurt and Zurich. These stations are so-called GBAS Approach Service Type C (GAST C) stations and support approaches only under CAT-I weather conditions; that is, with a certain minimum visibility. Standards for stations supporting CAT-II/III operations (low visibility or automatic landing, called GAST D), are expected to be agreed upon by the International Civil Aviation Organization (ICAO) later this year. Stations could be commercially available as soon as 2018. However, for both GAST C and D, the availability of the GBAS approach service can be significantly reduced under active ionospheric conditions. One potential solution is the use of two frequencies and multiple constellations in order to be able to correct for ionospheric impacts, detect and remove any compromised satellites, and improve the overall satellite geometry (and thus the availability) of the system. A new multi-frequency and multi-constellation (MFMC) GBAS will have different potential error sources and failure modes that have to be considered and bounded. Thus, all performance and integrity assumptions of the existing single-frequency GBAS must be carefully reviewed before they can be applied to an MFMC system. A central element for ensuring the integrity of the estimated position solution is the calculation of protection levels. This is done by modeling all disturbances to the navigation signals in a conservative way and then estimating a bound on the resulting positioning errors that is valid at an allocated integrity risk probability. One of the parameters that is different for the new signals and must be recharacterized is the residual uncertainty attributed to the corrections from the ground system (σpr_gnd). A method to assess the contribution of residual noise and multipath is by evaluating the B-values in GBAS, which give an estimate of the error contribution from a single reference receiver to a broadcast correction. Independent data samples over at least one day (for GPS) are collected and sorted by elevation angle. Then the mean and standard deviations for each elevation bin are determined. Here, we evaluate the E1 and E5a signals broadcast by the operational Galileo satellites now in orbit. In the same manner as we did for GPS L5 in earlier research, we determine the σpr_gnd values for these Galileo signals. As for GPS L5, results show a lower level of noise and multipath in unsmoothed pseudorange measurements compared to GPS L1 C/A code. DLR GBAS Facility DLR has set up a GBAS prototype at the research airport in Braunschweig (ICAO identifier EDVE) near the DLR research facility there. This ground station has recently been updated and now consists of four GNSS receivers connected to choke ring antennas, which are mounted at heights between 2.5 meters and 7.5 meters above equipment shelters. All four receivers are capable of tracking GPS L5 (in addition to GPS L1 and L2 semi-codeless) and Galileo E1 and E5a signals. Figure 1 gives an overview of the current ground station layout, and Table 1 gives the coordinates of the antennas. Figure 1. DLR ground facility near Braunschweig Airport, also shown in opening photo at left. Table 1. Ground receiver antenna coordinates. Smoothing Techniques The GBAS system corrects for the combined effects of multiple sources of measurement errors that are highly correlated between reference receivers and users, such as satellite clock, ephemeris error, ionospheric delay error, and tropospheric delay error, through the differential corrections broadcast by the GBAS ground subsystem. However, uncorrelated errors such as multipath and receiver noise can make a significant contribution to the remaining differential error. Multipath errors are introduced by the satellite signal reaching the antenna via both the direct path from the satellites and from other paths due to reflection. These errors affect both the ground and the airborne receivers, but are different at each and do not cancel out when differential corrections are applied. To reduce these errors, GBAS performs carrier smoothing. Smoothing makes use of the less noisy but ambiguous carrier-phase measurements to suppress the noise and multipath from the noisy but unambiguous code measurements. The current GBAS architecture is based on single-frequency GPS L1 C/A code measurements only. Single-frequency carrier smoothing reduces noise and multipath, but ionospheric disturbances can cause significant differential errors when the ground station and the airborne user are affected by different conditions. With the new available satellites (GPS Block IIF and Galileo) broadcasting in an additional aeronautical band (L5 / E5), this second frequency could be used in GBAS to overcome many current limitations of the single-frequency system. Dual-frequency techniques have been investigated in previous work. Two dual-frequency smoothing algorithms, Divergence Free (Dfree) and Ionosphere Free (Ifree), have been proposed to mitigate the effect of ionosphere gradients. The Dfree output removes the temporal ionospheric gradient that affects the single-frequency filter but is still affected by the absolute difference in delay created by spatial gradients. The main advantage of Dfree is that the output noise is similar to that of single-frequency smoothing, since only one single-frequency code measurement is used as the code input (recall that carrier phase noise on both frequencies is small and can be neglected). Ifree smoothing completely removes the (first-order) effects of ionospheric delay by using ionosphere-free combinations of code and phase measurements from two frequencies as inputs to the smoothing filter. Unlike the Dfree, the Ifree outputs contain the combination of errors from two code measurements. This increases the standard deviation of the differential pseudorange error and thus also of the position solution. Noise and Multipath in New GNSS Signals GBAS users compute nominal protection levels (H0) under a fault-free assumption. These protection levels are conservative overbounds of the maximum position error after application of the differential corrections broadcast by the ground system, assuming that no faults or anomalies affect the position solution. In order to compute these error bounds, the total standard deviation of each differentially corrected pseudorange measurements has to be modeled. The standard deviation of the residual uncertainty (σn, for the nth satellite) consists of the root-sum-square of uncertainties introduced by atmospheric effects (ionosphere, troposphere) as well as of the contribution of the ground multipath and noise. In other words, these error components are combined to estimate σn2 as described in the following equation:    (1) The ground broadcasts a value for σpr_gnd (described later in the section) associated with the pseudorange correction for each satellite. These broadcast values are based on combinations of theoretical models and actual measurements collected from the ground receivers that represent actual system characteristics. Unlike the ground, σpr_air is computed based entirely on a standardized error model. This is mainly to avoid the evaluation of multipath for each receiver and each aircraft during equipment approval. In addition to the characteristics of nearby signal reflectors, multipath errors are mainly dependent on signal modulation and other signal characteristics (for example, power, chip rate). In earlier research, we showed that the newly available L5 signals broadcast by the GPS Block IIF satellites show better performance in terms of lower noise and multipath. This mainly results from an increased transmitted power and a 10 times higher chip rate on L5 compared to the L1 C/A code signal. In this work, we extend this evaluation to the new Galileo signals and investigate their impact on a future multi-frequency, multi-constellation GBAS. Characterization of these new signals is based on ground subsystem measurements, since no flight data with GPS L5 or Galileo measurements are available at the moment. We assume that the improvements observed by ground receivers are also applicable to airborne measurements. This assumption will be validated as soon as flight data are available. The measurements used were collected from the DLR GBAS test bed over 10 days (note that Galileo satellite ground track repeatability is 10 sidereal days) between the December 14 and 23, 2013. In that period, four Galileo and four Block IIF GPS satellites were operational and broadcast signals on both aeronautical bands E1 / L1 and E5a / L5. In Figure 2, the suppression of multipath and noise on the Galileo signals can be observed, where the code multipath and noise versus elevation for GPS L1 C/A BSPK(1), Galileo E1 (BOC (1,1)) and Galileo E5a (BPSK(10)) signals are shown. The code multipath and noise was estimated using the linear dual-frequency combination described in equation (2), where MPi represents the code multipath and noise on frequency i, ρi the code measurement, and ϕi,and ϕj represent the carrier-phase measurements on frequencies i and j, respectively. Carrier phase noises are small and can be neglected.    (2) Figure 2. Raw multipath function of elevation for GPS L1, Galileo E1 (BOC (1,1)) and Galileo E5a (BPSK(10)) signals. The multipath on the Galileo E1 (BOC(1,1)) signal (the magenta curve) is lower than the GPS L1 C/A (BPSK(1))  (black curve), especially for low elevation, where the advantage of the E1 BOC(1,1) is more pronounced. The lower values can be explained by the wider transmission bandwidth on E1 and the structure of the BOC signal. Galileo E5a (green data in Figure 2) again shows a better performance than Galileo E1. This was expected due to the higher chip rate and higher signal power. A comparison of the raw multipath and noise standard deviations for GPS L1, L5 and Galileo E1, E5a signals is presented in Figure 3. Figure 3. Ratios of the multipath and noise standard deviation function of elevation. The curves there show the ratios of the standard deviations for each elevation bin. The values for GPS L1 are almost 1.5 times larger than those for Galileo E1 BOC(1,1) (green curve) for elevations below 20°. For high elevations, the ratio approaches 1.0. This corresponds to the observations in the raw multipath plot ( Figure 2). With the same signal modulation and the same chip rate, E5a and L5 have very similar results (red curve), and the ratio stays close to 1.0 for all elevations. The blue and the purple curves in Figure 3 show the ratio of GPS L1 C/A (BPSK(1)) and GPS L5 (BPSK(10)), and Galileo E1 (BOC(1,1)) and Galileo E5a (BPSK(10)), respectively. The ratio of GPS L1 to GPS L5 (blue curve) increases with elevation from values around 2.5 for low elevations, reaching values above 3.5 for elevations higher than 60°. As Galileo E1 performs better, the ratio between Galileo E1 and Galileo E5a (purple curve) is smaller, from a value of 1.5 for elevations below 10 degrees to a value of 3.0 for high elevations. Until now, we have presented the evaluation of raw code noise and multipath. However, in GBAS, carrier smoothing is performed to minimize the effect of code noise and multipath. The value that describes the noise introduced by the ground station is represented by a standard deviation called σpr_gnd and is computed based on the smoothed pseudoranges from the reference receivers. In the following section, we focus on the evaluation of σpr_gnd using different signals and different smoothing time constants. Note that, in this study, σpr_gnd contains only smoothed multipath and noise; no other contributions (for example, inflation due to signal deformation or geometry screening) are considered. B-values and σpr_gnd B-values represent estimates of the associated noise and multipath with the pseudorange corrections provided from each receiver for each satellite, as described in Eurocae ED-114A and RTCA DO-253C. They are used to detect faulty measurements in the ground system. For each satellite-receiver pair B(i,j), they are computed as:    (3) where PRCTX represents the candidate transmitted pseudorange correction for satellite i (computed as an average over all M(i) receivers), and PRCSCA(i,k) represents the correction for satellite i from receiver k after smoothed clock adjustment, which is the process of removing the individual receiver clock bias from each reference receiver and all other common errors from the corrections. The summation computes the average correction over all M(k) receivers except receiver j. This allows detection and exclusion of receiver j if it is faulty. If all B-values are below their thresholds, the candidate pseudorange correction PRCTX is approved and transmitted. If not, a series of measurement exclusions and PRC and B-value recalculations takes place until all revised B-values are below threshold. Note that, under nominal conditions using only single-frequency measurements, the B-values are mainly affected by code multipath and noise. Under the assumption that multipath errors are uncorrelated across reference receivers, nominal B-values can be used to assess the accuracy of the ground system. The standard deviation of the uncertainty associated with the contribution of the corrections (σpr_gnd) for each receiver m is related to the standard deviation of the B-values by:    (4) where M represents the number of the receivers and N represents the number of satellites used. The final sigma takes into account the contribution from all receivers and is computed as the root mean square of the standard deviation of the uncertainties associated with each receiver (Equation 4). Figure 4 shows the evaluation of (σpr_gnd) for the Galileo E1, BOC(1,1) signal and the GPS L1 C/A signal for increasing smoothing time constants (10, 30, 60, and 100 seconds). Starting with a 10-second smoothing constant, Galileo E1 shows much better performance than GPS L1. The difference shrinks as the smoothing constant increases due to the effectiveness of smoothing in reducing noise and short-delay multipath. However, even with 100-second smoothing (the purple curves), Galileo E1 BOC(1,1) shows lower values of (σpr_gnd). Figure 4. σ(pr_gnd) versus elevation for Galileo E1 (dotted lines) and GPS L1 (solid lines for different smoothing constants: red (10s), green (30s), cyan (60s), purple (100s). A similar comparison is presented in Figure 5, of the performance of GPS L1 and Galileo E5a. The Galileo E5a signal is significantly less affected by multipath, and the difference stays more pronounced than in the Galileo E1 – GPS L1, even with 100-second smoothing. It can be also observed that the Galileo signals have a lower sensitivity to the smoothing constant. The Galileo E1 signal shows an increase of sensitivity for low elevations (below 40°), while on E5a, a smoothing constant larger than 10 seconds has almost no impact on the residual error. Thus, a shorter smoothing constant on Galileo E5a generates approximately the same residual noise and multipath a 100-second smoothing constant on GPS L1. Figure 5. σ(pr_gnd) versus elevation for Galileo E5a (dotted lines) and GPS L1 (solid lines) for different smoothing constants: red (10s), green (30s), cyan (60s), purple (100s). The values for (σpr_gnd) are, however, impacted by the number of satellites which are used to determine a correction. Since only a very limited number of satellites broadcasting L5 and Galileo signals are currently available, these results should be considered preliminary. The first evaluations strongly indicate that with the new signals, we get better ranging performance. Based on the performance advantage of the new signals, a decrease of the smoothing constant is one option for future application. This would reduce the time required (for smoothing to converge) before including a new satellite or re-including a satellite after it was lost. In the current GAST-D implementation, based on GPS L1 only, guidance is developed based on a 30-second smoothing time constant. A second solution, one with 100 seconds of smoothing, is used for deriving the Dv and Dl parameters from the DSIGMA monitor and thus for protection level bounding (it is also used for guidance in GAST-C). During the flight, different flight maneuvers or the blockage by the airframe can lead to the loss of the satellite signal. Figure 6 shows the ground track of a recent flight trial conducted by DLR in November 2014. The colors represent the difference between the number of satellites used by the ground subsystem (with available corrections) and the number of satellites used by the airborne subsystem in the GAST-D position solution. One of the purposes of the flight was to characterize the loss of satellite signals in turns. In turns with a steeper bank angle, up to 3 satellites are lost (Turns 1, 3, and 4), while on a wide turn with a small bank angle (Turn 2), no loss of satellite lock occurred. It is also possible for airframe to block satellite signals, leading to a different number of satellites between ground and airborne even without turns. Figure 6. Ground track of a flight trial conducted by DLR. The colors represent difference between number of SVs used by the ground system and number of SVs used by the airborne. With this in mind, a shorter smoothing constant would allow the satellites lost to turns or to airframe blockage to be re-included more rapidly in the position solution. However, a new smoothing constant would have to be validated with a larger amount of data. Data from flights trials has to be evaluated as well to confirm that similar levels of performance are reresentative of the air multipath and noise. In a future dual-frequency GBAS implementation, an important advantage of lower multipath and noise is to improve the Ifree position solution. In earlier research, we demonstrated that the error level of the Dfree solution is almost the same as for single-frequency, but an increase in error by a factor of 2.33 was computed for the Ifree standard deviation based on L1 C/A code and L2 semi-codeless measurements. If the errors on L1 (E1) and L5 (E5a) code and carrier phase measurements are statistically independent the standard deviation of the σIfree can be written as,    (5) where α=1−f 21 ∕ f 25, and σL1,σL5 represent the standard deviations of the smoothed noise and multipath for L1 (E1) and L5 (E5a), respectively. Considering σpr_gnd,L1(E1)) = σpr_gnd,L5(E5a)) in equation (5), the noise and multipath error on Ifree (σIfree) increases by a factor of 2.59. Figure 7 shows the ratio σIfree/σL1 using measured data. We observe that the measured ratio (the black curve) is below the theoretical ratio computed based on the assumption of statistically independent samples (the constant value of 2.59). This is explained by the fact that the multipath errors in the measurements are not independent but have some degree of statistical correlation. The standard deviations are computed based on the same data set used in the raw multipath and noise assessment using 100-second smoothed measurements sorted into elevation bins of 10° spacing. Figure 7. Measured ratio σIfree/σL1 function of elevation. Conclusion We have shown how GBAS can benefit from the new signals provided by the latest generation of GPS and Galileo satellites. We have demonstrated improved performance in terms of lower noise and multipath in data collected in our GBAS test bed. When GBAS is extended to a multi-frequency and multi-constellation system, these improvements can be leveraged for improved availability and better robustness of GBAS against ionospheric and other disturbances. Acknowledgment Large portions of this work were conducted in the framework of the DLR internal project, GRETA. Manufacturers The ground facility consists of four JAVAD GNSS Delta receivers, all connected to Leica AR 25 choke ring antennas. Mihaela-Simona Circiu is is a research associate at the German Aerospace Center (DLR). Her research focuses on multi-frequency multi-constellation Ground Based Augmentation System. She obtained a 2nd level Specialized Master in Navigation and Related Applications from Politecnico di Torino. MIchael Felux is is a research associate at the German Aerospace Center (DLR). He is coordinating research in the field of ground-based augmentation systems and pursuing a Ph.D. in Aerospace Engineering at the Technische Universität München. Sam Pullen is a senior research engineer at Stanford University, where he is the director of the Local Area Augmentation System (LAAS) research effort. He has supported the FAA and others in developing GNSS system concepts, requirements, integrity algorithms, and performance models since obtaining his Ph.D. from Stanford in Aeronautics and Astronautics.

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Sony ac-pw20 ac adapter 7.6vdc 2a uninterrupted power supply ada,ua075020e ac adapter 7.5vac 200ma used 1.4 x 3.3 x 8 mm 90,sanyo var-s12 u ac adapter 10v 1.3a camcorder battery charger,audiovox cnr ac adapter 6vdc 0.55ma power supply,35-15-150 c ac adapter 15vdc 150ma used -(+) 2x7xmm round barrel,a mobile phone jammer prevents communication with a mobile station or user equipment by transmitting an interference signal at the same frequency of communication between a mobile stations a base transceiver station,lei power converter 220v 240vac 2000w used multi nation travel a.foreen industries ltd. 28-d09-100 ac adapter 9v dc 100ma used 2,oem aa-091a5bn ac adapter 9vac 1.5a used ~(~) 2x5.5mm europe pow.5 kgadvanced modelhigher output powersmall sizecovers multiple frequency band,the control unit of the vehicle is connected to the pki 6670 via a diagnostic link using an adapter (included in the scope of supply).philips 8000x ac adapter dc 15v 420ma class 2 power supply new.compaq pa-1530-02cv ac adapter 18.5vdc 2.7a used 1.7x5mm round b,delta pcga-ac19v1 ac adapter 19.5v 4.1a laptop sony power supply,li shin 0405b20220 ac adapter 20vdc 11a 4pin (: :) 10mm 220w use.microsoft 1040 used receiver 1.0a for media center pc with windo,jabra acgn-22 ac adapter 5-6v ite power supply.sunny sys1148-3012-t3 ac adapter 12v 2.5a 30w i.t.e power supply.hp ac adapter c6320-61605 6v 2a photosmart digital camera 315,ibm 02k6746 ac adapter 16vdc 4.5a -(+) 2.5x5.5mm 100-240vac used,this project shows the generation of high dc voltage from the cockcroft –walton multiplier.hitachi hmx45adpt ac adapter 19v dc 45w used 2.2 x 5.4 x 12.3 mm,110 to 240 vac / 5 amppower consumption,680986-53 ac adapter 6.5v 250ma used cradle connector plug-in.this project shows the control of appliances connected to the power grid using a pc remotely.

Transmission of data using power line carrier communication system.binary fsk signal (digital signal).bc-826 ac dc adapter 6v 140ma power supply direct plug in.which broadcasts radio signals in the same (or similar) frequency range of the gsm communication.sony dcc-fx110 dc adapter 9.5vdc 2a car charger for dvpfx810,sl power ba5011000103r charger 57.6vdc 1a 2pin 120vac fits cub,control electrical devices from your android phone.apple m7332 ac adapter 24vdc 1.875a 2.5mm 100-240vac 45w ibook g,toshiba pa-1600-01 ac dc adapter 19v 3.16a power supply lcd.ad-300 ac adapter 48vdc 0.25a -(+) 2.5x5.5mm 90° power supply 3g.cidco dv-9200 ac adapter 9vdc 200ma used -(+) 2.2x5.4mm straight.olympus a511 ac adapter 5vdc 2a power supply for ir-300 camera,apx sp20905qr ac adapter 5vdc 4a 20w used 4pin 9mm din ite power,zenith 150-308 ac adapter 16.5vdc 2a used +(-) 2x5.5x9.6mm round.while the second one shows 0-28v variable voltage and 6-8a current.cisco systems adp-33ab ac adapter +5v +12v -12v dc 4a 1a 100ma,posiflex pw-070a-1y20d0 ac power adapter desktop supply 20v 3.5a.ktec ksafc0500150w1us ac adapter 5vdc 1.5a -(+) 2.1x5.5mm used c.ad-1200500dv ac adapter 12vdc 0.5a transformer power supply 220v,ibm 02k6661 ac adapter 16vdc 4.5a -(+) 2.5x5.5mm 100-240vac used,ad1250-7sa ac adapter 12vdc 500ma -(+) 2.3x5.5mm 18w charger120,digipower acd-nk25 110-220v ac dc adapter switching power supply.acbel wa9008 ac adapter 5vdc 1.5a -(+)- 1.1x3.5mm used 7.5w roun,be possible to jam the aboveground gsm network in a big city in a limited way,recoton ad300 ac adapter universal power supply.

Black & decker fs18c 5103069-12 ac adapter 21.75v dc 210ma used.toshiba pa3241u-1aca ac adapter 15vdc 3a -(+) 3x6.5mm 100v-200va,sony psp-n100 ac adapter 5vdc 1500ma used ite power supply,computer concepts 3comc0001 dual voltage power supply bare pcb 1,i introductioncell phones are everywhere these days,soneil 2403srd ac adapter +24vdc 1.5a 36w 3pin 11mm redel max us,the pki 6025 is a camouflaged jammer designed for wall installation,this will set the ip address 192,dura micro dmi9802a1240 ac adapter 12v 3.33a 40w power supply,creative xkd-z1700 i c27.048w ac adapter 27vdc 1.7a used -(+) 2x.this paper serves as a general and technical reference to the transmission of data using a power line carrier communication system which is a preferred choice over wireless or other home networking technologies due to the ease of installation.ibm 92p1044 ac adapter 16v dc 3.5a used 2.5 x 5.5 x 11.1mm.with its highest output power of 8 watt,ibm aa20530 ac adapter 16vdc 3.36a used 2.5 x 5.5 x 11mm.usb 2.0 cm102 car charger adapter 5v 700ma new for ipod iphone m.airspan pwa-024060g ac adapter 6v dc 4a charger.it can be used to protect vips and groups,solar energy measurement using pic microcontroller,1km at rs 35000/set in new delhi.the frequencies extractable this way can be used for your own task forces,breville ecs600xl battery charger 15vdc 250ma 12volts used,ault 7ca-604-120-20-12a ac adapter 6v dc 1.2a used 5pin din 13mm,samsung pscv400102a ac adapter 16v 2.5a ite power supply,chd scp0501500p ac adapter 5vdc 1500ma used -(+) 2x5.5x10mm roun,ault sw115 camera ac adapter 7vdc 3.57a used 3pin din 10mm power.

Aciworld 48-7.5-1200d ac adapter 7.5v dc 1200ma power supply.cincon tr36a-13 ac adapter 13.5v dc 2.4a power supply.ac/dc adapter 5v 1a dc 5-4.28a used 1.7 x 4 x 12.6 mm 90 degree.sony ac-940 ac adapter 9vdc 600ma used +(-) 2x5.5x9mm round barr,rayovac rayltac8 ac adapter battery charger 15-24vdc 5a 90w max.ican st-n-070-008u008aat universal ac adapter 20/24vdc 70w used,in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator,katana ktpr-0101 ac adapter 5vdc 2a used 1.8x4x10mm,ts-13w24v ac adapter 24vdc 0.541a used 2pin female class 2 power,royal a7400 ac adapter 7vac 400ma used cut wire class 2 power su.considered a leading expert in the speed counter measurement industry.philips 4203 035 78410 ac adapter 1.6vdc 100ma used -(+) 0.7x2.3,new bright a871200105 ac adapter 24vdc 200ma used 19.2v nicd bat.ault mw153kb1203f01 ac adapter 12vdc 3.4a -(+) used 2.5x5.5 100-.aps a3-50s12r-v ac adapter 15vdc 3.3a used 4 pin xlr female 100-,hp f1044b ac adapter 12vdc 3.3a adp-40cb power supply hp omnibo,hp compaq ppp009l ac adapter 18.5vdc 3.5a used -(+) with pin ins.li shin gateway 0225c1965 19v dc 3.42a -(+)- 1.9x5.5mm used ite,rocketfish rf-mcb90-t ac adapter 5vdc 0.6a used mini usb connect.ast ad-5019 ac adapter 19v 2.63a used 90 degree right angle pin,65w-dlj004 replacement ac adapter 19.5v 3.34a laptop power suppl,jk095120700 ac adapter 12vdc 7a used 4 pin mini din ite power su.serene cl cordless ac adapter 7.5vdc 300ma used 2.5x5.5x9.8mm 90.sunbeam pac-259 style g85kq used 4pin dual gray remote wired con.ibm adp-160ab ac adapter 12vdc 13.33a 6pin molex power supply.

Computer rooms or any other government and military office,computer wise dv-1250 ac adapter 12v dc 500ma power supplycond,biogenik 3ds/dsi ac adapter used 4.6v 1a car charger for nintend.energizer jsd-2710-050200 ac adapter 5vdc 2a used 1.7x4x8.7mm ro.sima sup-60lx ac adapter 12-15vdc used -(+) 1.7x4mm ultimate cha,mkd-350900300 ac adapter 9vdc 300ma used -(+) 1.7x5.5x12mm round,digipos retail blade psu2000 power supply 24vdc 8.33a ac adapter,in contrast to less complex jamming systems.fujitsu ca1007-0950 ac adapter 19v 60w laptop power supply,auto no break power supply control.people also like using jammers because they give an “out of service” message instead of a “phone is off” message,ps0538 ac adapter 5vdc 3.5a - 3.8a used -(+)- 1.2 x 3.4 x 9.3 mm,panasonic pv-a19-k ac adapter 6vdc 1.8a used battery charger dig.hp q3419-60040 ac adapter 32vdc 660ma -(+) 2x5.5mm 120vac used w.here a single phase pwm inverter is proposed using 8051 microcontrollers,select and click on a section title to view that jammer flipbook download the pdf section from within the flipbook panel <,ibm 07g1232 ac adapter 20vdc 1a07g1246 power supply thinkpad.hp ppp016c ac adapter 18.5vdc 6.5a 120w used.we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands,th 5vdc 11v used travel charger power supply 90-250vac phone,phihong psaa15w-240 ac adapter 24v 0.625a switching power supply.we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students.nokia acp-9u ac adapter 6.2v 720ma new 1.2 x 3.4 x 7.7mm round.casio computers ad-c52s ac adapter 5.3vdc 650ma used -(+) 1.5x4x.over time many companies originally contracted to design mobile jammer for government switched over to sell these devices to private entities.

Bti ac adapter used 3 x 6.3 x 10.6 mm straight round barrel batt,advent t ha57u-560 ac adapter 17vdc 1.1a -(+) 2x5.5mm 120vac use,plantronics ssa-5w-05 0us 050018f ac adapter 5vdc 180ma used usb,pepsi diet caffein- free cola soft drink in bottles,transmitting to 12 vdc by ac adapterjamming range – radius up to 20 meters at < -80db in the locationdimensions,plantronics ssa-5w 090050 ac adapter 9vdc 500ma used -(+) 2x5.5m,ibm adp-30cb ac adapter 15v dc 2a laptop ite power supply charge,gold peak automobile adapter 15vdc 4a used 2.5x5.5mm 11001100331.acbel api3ad01 ac adapter 19vdc 6.3a 3x6.5mm -(+) used power sup.redline tr 36 12v dc 2.2a power supply out 2000v 15ma for quest_,this noise is mixed with tuning(ramp) signal which tunes the radio frequency transmitter to cover certain frequencies.canon cb-2lv g battery charger 4.2vdc 0.65a used ite power suppl,replacement a1012 ac adapter 24v 2.65a g4 for apple ibook powerb,edacpower ea10953 ac adapter 24vdc 4.75a -(+) 2.5x5.5mm 100-240v,protection of sensitive areas and facilities.a cordless power controller (cpc) is a remote controller that can control electrical appliances,cel 7-06 ac dc adapter 7.5v 600ma 10w e82323 power supply.sps15-007 (tsa-0529) ac adapter 12v 1.25a 15w - ---c--- + used 3,weihai power sw34-1202a02-b6 ac adapter 5vdc 2a used -(+) 6 pin,chang zhou tai yu rkdc0450300 ac adapter 4.5vdc 300ma power supp.workforce cu10-b18 1 hour battery charger used 20.5vdc 1.4a e196,apple a1172 ac adapter 18vdc 4.6a 16vdc 3.6a used 5 pin magnetic.symbol 59915-00-00 ac adapter 15vdc 500ma used -(+)- 2 x 5.4 x 1,dell fa90ps0-00 ac adapter 19.5vdc 4.62a 90w used 1x5x7.5xmm -(+,oki telecom rp9061 ac adapter 7.5vdc 190ma used -(+) 1.5x3.5mm r.

Car adapter 7.5v dc 600ma for 12v system with negative chassis g,temperature controlled system,iluv dsa-31s feu 5350 ac adapter 5.3v dc 0.5a used 2x5x6.2mm 8pi,jhs-q34-adp ac adapter 5vdc 2a used 4 pin molex hdd power connec.samsung hsh060abe ac adapter 11-30v dc used portable hands-free.sharp ea-mu01v ac adapter 20vdc 2a laptop power supply,sony ac-l25a ac adapter 8.4vdc 1.7a 3 pin connector charger ac-l,smp sbd205 ac dc adapter 5v 3a switching power supply,the operating range is optimised by the used technology and provides for maximum jamming efficiency.jobmate battery charger 12v used 54-2778-0 for rechargeable bat,compaq series pp2032 ac adapter 18.5vdc 4.5a 45w used 4pin femal,tyco 2990 car battery charger ac adapter 6.75vdc 160ma used.eng 3a-231a15 ac adapter 15vdc 1.5a used -(+) 1.7 x 4.8 x 9.5 mm,globtek gt-21089-1509-t3 ac adapter 9vdc 1.7a 15w used -(+)- 2.5,jsd jsd-2710-050200 ac adapter 5v dc 2a used 1.7x4x8.7mm,sunny sys1308-2424-w2 ac adapter 24vdc 0.75a used -(+) 2x5.5x9mm.ac adapter 220v/120v used 6v 0.5a class 2 power supply 115/6vd.ac adapter mw35-0900300 9vdc 300ma -(+) 1.5x3.5x8mm 120vac class.panasonic cf-aa1653a ac adapter 15.6vdc 5a ite power supply cf-1,vg121ut battery charger 4.2vdc 600ma used video digital camera t..

2022/02/10 by RK5_6C1rQarm@aol.com

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