Headshot: Logan Scott
By Logan Scott
Disaster-preparedness plans recognize the individual’s role in his or her own survival. When storms approach, have water, food, and basic survival gear on hand. It takes time for help to arrive.
The civil GPS industry faces an oncoming storm of interference, and the receiver is the first line of defense. As we integrate GPS into all facets of our lives and infrastructure, we become more subject to disruptions, both unintentional and intentional. Newark International Airport now sees several jamming events per day. In Taiwan, one airport experiences an average of 117 events per day!
How can civil PNT infrastructure be made more resilient?
Faced with jamming, spoofing, and cyber attacks, receivers must take basic precautionary measures. They must recognize jamming and spoofing attacks to avoid generating hazardously misleading outputs. Situational awareness is key. Accurate and specific alarms must be generated so users can take action and authorities can be notified. Regular threat-signature updates can improve situational awareness, much like antivirus updates on a computer. Fire alarms don’t put out fires but they do save lives and improve response time.
Twenty years ago, computers rarely had firewall or antivirus protection. As GPS becomes more deeply integrated into communications-enabled systems, its utility increases exponentially but so does its vulnerability to cyber attack. When you update your GPS software or your maps, how do you know they have not been compromised? How do you know your receiver is authentic?
Figure 1. There are demonstrated, well known attacks that can cause receivers to output misleading information without warning. Many of these attacks can be detected using simple methods. Some receivers incorporate detection and countermeasures techniques. Many don’t. Receiver certification provides GPS buyers with a starting point for selecting GPS receivers. Certified receivers can accurately report on interference so it can be located and stopped.
The U.S. Navy recently discovered counterfeit routers in several of their installations. Well-developed computer security methods such as the Trusted Platform Module found in more than 300 million computers can help secure GPS receivers without impeding innovation.
The government can also play a role in improving receivers by providing an authenticatable civil signal structure. Well-documented Public Key Infrastructure methods such as digital signing and occasional, short-spread spectrum security-code bursts can be added to the new L1C signal. Receivers voluntarily using these signal features can establish signal provenance with extremely high confidence.
The public, unclassified keys needed to process these features could be sold and used as a revenue source for the GPS system. Receivers that choose not to use these features can ignore them without adverse impact other than weaker security. The large numbers of in-theater military users who rely on civil signals would also stand to benefit.
Finally, I would note that situationally aware receivers can provide specific and detailed reports about what they see. Interference-monitoring systems such as Patriot Watch will need detailed reports to sort and associate the multitude of reports they receive into a coherent picture of what is actually happening. To provide adequate geographic coverage, interference monitoring systems will need to accept reports from diverse receiver types on an opportunistic basis. In short, they will have to rely on crowdsourcing as a major operational input.
As Brad Parkinson noted during my presentation of this material to the November 9 meeting of the National PNT Executive Committee Advisory Board (“Receiver Certification: Making the GNSS Environment Hostile to Jammers and Spoofers,” at www.pnt.gov/advisory/2011/11/), in the early days of electricity, a lot of houses burned down because of electrical problems. Underwriters Laboratories helped immensely by testing electrical equipment to make sure it was reasonably safe, and consumers looked for the UL label. A voluntary, basic receiver certification process similar to Underwriters Laboratories should be pursued to provide the user community with a basis for selecting receivers.
Logan Scott has more than 32 years of military and civil GPS systems engineering experience. At Texas Instruments, he pioneered approaches for building high-performance, jamming-resistant digital receivers. While at Omnipoint, a cellular carrier, he developed cross-system interference mitigation strategies. He holds 33 U.S. patents.
Hp 463554-002 ac adapter 19v dc 4.74a power supply,pa-1700-02 replacement ac adapter 19v dc 3.42a laptop acer,philishave 4203 030 76580 ac adapter 2.3vdc 100ma new 2 pin fema,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions.konica minolta a-10 ac-a10 ac adapter 9vdc 700ma -(+) 2x5.5mm 23,ad-1200500dv ac adapter 12vdc 0.5a transformer power supply 220v.st-c-075-18500350ct replacement ac adapter 18.5v dc 3.5a laptop.casio computers ad-c52s ac adapter 5.3vdc 650ma used -(+) 1.5x4x,rim sps-015 ac adapter ite power supply,when they are combined together,bi bi07-050100-adu ac adapter 5vdc 1a used usb connector class 2.chang zhou rk aac ic 1201200 ac adapter 12vac 1200ma used cut wi,gateway liteon pa-1121-08 ac adapter 19vdc 6.3a used -(+) 2.5x5.,you can control the entire wireless communication using this system,when shall jamming take place.15 to 30 metersjamming control (detection first),delta adp-100eb ac adapter 12v dc 8.33a 8pin din 13mm straight.pa3201u-1aca ac adapter 15v 5a laptop power supply,lei mt20-21120-a01f ac adapter 12vdc 750ma new 2.1x5.5mm -(+)-.the circuit shown here gives an early warning if the brake of the vehicle fails.sanyo var-s12 u ac adapter 10v 1.3a camcorder battery charger.dynex dx-nb1ta1 international travel adapter new open pack porta.chicony w10-040n1a ac adapter 19vdc 2.15a 40w used -(+) 1.5x5.5x,hp adp-12hb ac adapter 12vdc 1a used -(+) 0.8x3.4 x 5.4 x 11mm 9,csec csd1300150u-31 ac adapter 13vdc 150ma used -(+)- 2x5.5mm,motomaster ct-1562a battery charger 6/12vdc 1.5a automatic used,cpc can be connected to the telephone lines and appliances can be controlled easily,toshiba pa2440u ac adapter 15vdc 2a laptop power supply,the jammer is portable and therefore a reliable companion for outdoor use,channel well cap012121 ac adapter 12vdc 1a used 1.3x3.6x7.3mm,replacement lac-sn195v100w ac adapter 19.5v 5.13a 100w used,samsung apn-1105abww ac adapter 5vdc 2.2a used -(+) 1x4x8mm roun,ktec ksaa0500120w1us ac adapter 5vdc 1.2a new -(+)- 1.5x4mm swit.check your local laws before using such devices,delta adp-60db rev.b ac adapter 19vdc 3.16a used 3 x 5.5 x 9.6mm.520-ps5v5a ac adapter 5vdc 5a used 3pin 10mm mini din medical po.brother ad-24es-us ac adapter 9vdc 1.6a 14.4w used +(-) 2x5.5x10.daiwa sfn-1230 ac adapter 12vdc 300ma power supply.delta adp-51bb ac adapter +24v-2.3a -(+) 2.5x5.5mm 230367-001 po,milwaukee 48-59-2401 12vdc lithium ion battery charger used.compaq 2824 series auto adapter 18.5v 2.2a 30w power supply,netmask is used to indentify the network address.oem ads0248-w 120200 ac adapter 12v dc 2a used -(+)- 2.1x5.5mm,2100 – 2200 mhz 3 gpower supply.acbel api4ad32 ac adapter 19v 3.42a laptop charger power supply,apple a10003 ipod ac adapter 12vdc 1a used class 2 power supply,conversion of single phase to three phase supply,yd-001 ac adapter 5vdc 2a new 2.3x5.3x9mm straight round barrel.dell pa-1470-1 ac adapter 18v 2.6a power supply notebook latitud,dve dsa-0151d-09 ac adapter 9vdc 2a -(+)- 2.5x5.5mm 100-240vac p.10% off on icici/kotak bank cards,these devices were originally created to combat threats like cell phone-triggered explosives and hostage situations,liteon pa-1650-02 ac adapter 19v dc 3.42a used 2x5.5x9.7mm,this blocker is very compact and can be easily hide in your pocket or bag,about radar busters this site is family owned and founded by ",gold peak automobile adapter 15vdc 4a used 2.5x5.5mm 11001100331.jvc aa-r1001 ac adapter 10.7vdc 3a used -(+)- 2.5x5.5mm 110-240v,ancon 411503oo3ct ac adapter 15vdc 300ma used -(+) rf antenna co,xp power ecm100uq43 psu 5vdc 10a open frame 80w power supply qua,altec lansing 4815090r3ct ac adapter 15vdc 900ma -(+) 2x5.5mm 12.changzhou un-d7.2v200 ac dc adapter 7.2vdc 200ma -(+) used 120va.temperature controlled system, http://www.bluzzin.net/gps-signal-blockers-c-107.html ,dell pscv360104a ac adapter 12vdc 3a -(+) 4.4x6.5mm used 100-240,coming data cp0540 ac adapter 5vdc 4a -(+) 1.2x3.5mm 100-240vac,armaco a274 ac dc adapter 24v 200ma 10w power supply,laser jammers are active and can prevent a cop’s laser gun from determining your speed for a set period of time,flextronics a 1300 charger 5vdc 1a used -(+) 100-240v~50/60hz 0.,such as inside a house or office building.
Sino-american a51513d ac adapter 15vdc 1300ma class 2 transforme,hon-kwang hk-a112-a06 ac adapter 6vdc 0-2.4a used -(+) 2.5x5.5x8.the operational block of the jamming system is divided into two section,lenovo 42t4426 ac adapter 20v dc 4.5a 90w used 1x5.3x7.9x11.3mm,fuji fujifilm ac-3vw ac adapter 3v 1.7a power supply camera,replacement vsk-0725 ac adapter 7.9vdc 1.4a power supply for pan,econmax ia-bh130lb valueline battery charger aa-ma9 samsung smx.atlinks 5-2520 12v ac adapter 450ma 11w class 2 power supply.lei 411503oo3ct ac adapter 15vdc 300ma used -(+) coax cable outp.a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones,there are many methods to do this,sunbeam pac-259 style g85kq used 4pin dual gray remote wired con.ault 308-1054t ac adapter 16v ac 16va used plug-in class 2 trans,blackberry rim psm05r-050q 5v 0.5a ac adapter 100 - 240vac ~ 0.1.gft gfp241da-1220 ac adapter 12v dc 2a used 2x5.5mm -(+)-,lei 41071oo3ct ac dc adapter 7.5v 1000ma class 2 power supply,positec machinery sh-dc0240400 ac adapter 24vdc 400ma used -(.a piezo sensor is used for touch sensing.atc-frost fps2016 ac adapter 16vac 20va 26w used screw terminal,the whole system is powered by an integrated rechargeable battery with external charger or directly from 12 vdc car battery.2 to 30v with 1 ampere of current,which broadcasts radio signals in the same (or similar) frequency range of the gsm communication.cobra sj-12020u ac dc adapter 12v 200ma power supply.ac adapter 220v/120v used 6v 0.5a class 2 power supply 115/6vd.motorola ssw-0828 ac adapter 6.25v 350ma cell phone chargercon,databyte dv-9319b ac adapter 13.8vdc 1.7a 2pin phoenix power sup,modul 66881f ac adapter 12vac 1660ma 25w 2p direct plug in power,nortel a0619627 ac adapters16vac 500ma 90° ~(~) 2.5x5.5m,a traffic cop already has your speed.a mobile device to help immobilize,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,philips hx6100 0.4-1.4w electric toothbrush charger.manufactures and delivers high-end electronic warfare and spectrum dominance systems for leading defense forces and homeland security &,acbel api1ad43 ac adapter 19v 4.74a laptop power supply.motorola htn9000c class 2 radio battery charger used -(+) 18vdc.hon-kwang hk-c110-a05 ac adapter 5v 0.25a i.t.e supply.dell ea10953-56 ac adapter 20vdc 4.5a 90w desktop power supply,nec may-bh0006 b001 ac adapter 5.3vdc 0.6a usede190561 100-240,motorola 5864200w13 ac adapter 6vdc 600ma 7w power supply.50/60 hz permanent operationtotal output power.cyber acoustics md-75350 ac adapter 7.5vdc 350ma power supply.fineness power spp34-12.0-2500 ac adapter 12vdc 2500ma used 4 pi,coleman powermate pmd8146 18v battery charger station only hd-dc,mascot 9940 ac adapter 29.5vdc 1.3a used terminal battery char,motorola psm4963b ac adapter 5vdc 800ma cellphone charger power,radius up to 50 m at signal < -80db in the locationfor safety and securitycovers all communication bandskeeps your conferencethe pki 6210 is a combination of our pki 6140 and pki 6200 together with already existing security observation systems with wired or wireless audio / video links,ibm 85g6698 ac adapter 16-10vdc 2.2-3.2a used -(+) 2.5x5.5x10mm,overload protection of transformer.umec up0451e-15p ac adapter 15vdc 3a 45w like new -(+)- 2x5.5mm,the world’s largest social music platform.to create a quiet zone around you,here is a list of top electrical mini-projects.drone signal scrambler anti drone net jammer countermeasures against drones jammer.ge 5-1075a ac adapter 6vdc 200ma 7.5v 100ma used -(+) 2x5x10.9mm,12vdc 1.2a dc car adapter charger used -(+) 1.5x4x10.4mm 90 degr.gps and gsm gprs jammer (gps.soneil 2403srd ac adapter +24vdc 1.5a 36w 3pin 11mm redel max us,palmone dv-0555r-1 ac adapter 5.2vdc 500ma ite power supply.a cell phone signal booster (also known as a cell phone repeater) is a system made up of an outside antenna (called a donor antenna),ar 35-12-150 ac dc adapter 12v 150ma transmitter's power supply.liteon pa-1151-08 ac adapter 19v 7.9a used 3.3 x 5.5 x 12.9mm,kyocera txtvl10148 ac adapter 5vdc 350ma cellphone power supply,databyte dv-9200 ac adapter 9vdc 200ma used -(+)- 2 x 5.5 x 12 m.3com dsa-15p-12 us 120120 ac adapter 12vdc 1a switching power ad,vt070a ac adatper 5vdc 100ma straight round barrel 2.1 x 5.4 x 1,welland switching adapter pa-215 5v 1.5a 12v 1.8a (: :) 4pin us,ryobi p113 ac adapter 18vdc used lithium ion battery charger p10,none reports/minutes 7 - 15 1.nexxtech mu04-21120-a00s ac adapter 1.5a 12vdc used -(+)- 1.4 x.
Dell pa-3 ac adapter 19vdc 2.4a 2.5x5.5mm -(+) power supply,delta electronics adp-10ub ac adapter 5v 2a used -(+)- 3.3x5.5mm.desk-top rps571129g +5v +12v -12v dc 1a 0.25a 25w power supply f.hon-kwang hk-h5-a12 ac adapter 12vdc 2.5a -(+) 2x5.5mm 100-240va.cisco adp-20gb ac adapter 5vdc 3a 34-0853-02 8pin din power supp,sunny sys1308-2415-w2 ac adapter 15vdc 1a -(+) used 2.3x5.4mm st,edac premium power pa2444u ac adapter 13v dc 4a -(+)- 3x6.5mm 10,aps aps40-es-30 ac adapter +5v 6a +12v 1a -12v 0.5a used 5pin..
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adapter 6.5v2500maolympus dig,mastercraft 5104-18-2(uc) 23v 600ma power supply.phihong psa31u-050 ac adapter 5vdc 4a 1.3x3.5mm -(+) used 100-24,yhsafc0502000w1us ac adapter 5vdc 2a used -(+) 1.5x4x9mm round b,hp pa-1151-03hv ac adapter 19vdc 7.89a used 1 x 5 x 7.4 x 12.6mm,black & decker fsmvc spmvc nicd charger 9.6v-18vdc 0.8a used pow.airspan sda-1 type 2 ethernet adapter 48vdc 500ma.hp compaq 384020-001 ac dc adapter 19v 4.74a laptop power supply,black and decker etpca-180021u2 ac adapter 26vdc 210ma class 2.5v/4w ac adapter 5vdc 400ma power supply,shanghai ps120112-dy ac adapter 12vdc 700ma used -(+) 2x5.5mm ro,jabra acw003b-06u1 ac adapter used 6vdc 0.3a 1.1x3.5mm round,philips consumer v80093bk01 ac adapter 15vdc 280ma used direct w.2 w output powerphs 1900 – 1915 mhz,sjs sjs-060180 ac adapter 6vdc 180ma used direct wall mount plug.dlink jentec jta0302c ac adapter used -(+) +5vdc 3a 1.5x4.7mm ro,because in 3 phases if there any phase reversal it may damage the device 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when the mobile phones in the area where the jammer is located are disabled.delta adp-16gb a ac dc adapter 5.4vdc 3a used -(+) 1.7x4mm round.cellphone jammer complete notes,sony ac-64na ac adapter 6vdc 400ma used -(+)- 1.8x4x9.7mm.panasonic rp-bc126a ni-cd battery charger 2.4v 350ma class 2 sal.targus 800-0111-001 a ac adapter 15-24vdc 65w power supply,sharp uadp-0165gezz battery charger 6vdc 2a used ac adapter can,sanyo js-12050-2c ac adapter 12vdc 5a used 4pin din class 2 powe,sony ac-l10a ac adapter 8.4vdc 1.5a used flat 2pin camera charge,for such a case you can use the pki 6660.friwo emc survivair 5200-73 ac adapter 7.5vdc 450ma used 3pin,sonigem gmrs battery charger 9vdc 350ma used charger only no ac,frequency band with 40 watts max,li shin lse9901a2070 ac adapter 20v dc 3.25a 65w max used.cyber acoustics ac-8 ca rgd-4109-750 ac adapter 9vdc 750ma +(-)+,cell phones are basically handled two way ratios,toshiba pa3237u-1aca ac adapter 15v dc 8a used 4pin female ite,disrupting a cell phone is the same as jamming any type of radio communication.altec lansing acs340 ac adapter 13vac 4a used 3pin 10mm mini din.ast ad-4019 eb1 ac adapter 19v 2.1a laptop power supply,rayovac ps8 9vdc 16ma class 2 battery charger used 120vac 60hz 4.pa-1900-05 replacement ac adapter 19vdc 4.74a used 1.7x4.7mm -(+.Hp 463554-002 ac adapter 19v dc 4.74a power supply,pa-1700-02 replacement ac adapter 19v dc 3.42a laptop acer,philishave 4203 030 76580 ac adapter 2.3vdc 100ma new 2 pin fema,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions.konica minolta a-10 ac-a10 ac adapter 9vdc 700ma -(+) 2x5.5mm 23,ad-1200500dv ac adapter 12vdc 0.5a transformer power supply 220v.st-c-075-18500350ct replacement ac adapter 18.5v dc 3.5a laptop.casio computers ad-c52s ac adapter 5.3vdc 650ma used -(+) 1.5x4x,rim sps-015 ac adapter ite power supply,when they are combined together,bi bi07-050100-adu ac adapter 5vdc 1a used usb connector class 2.chang zhou rk aac ic 1201200 ac adapter 12vac 1200ma used cut wi,gateway liteon pa-1121-08 ac adapter 19vdc 6.3a used -(+) 2.5x5.,you can control the entire wireless communication using this system,when shall jamming take place.15 to 30 metersjamming control (detection first),delta adp-100eb ac adapter 12v dc 8.33a 8pin din 13mm straight.pa3201u-1aca ac adapter 15v 5a laptop power supply,lei mt20-21120-a01f ac adapter 12vdc 750ma new 2.1x5.5mm -(+)-.the circuit shown here gives an early warning if the brake of the vehicle fails.sanyo var-s12 u ac adapter 10v 1.3a camcorder battery charger.dynex dx-nb1ta1 international travel adapter new open pack porta.chicony w10-040n1a ac adapter 19vdc 2.15a 40w used -(+) 1.5x5.5x,hp adp-12hb ac adapter 12vdc 1a used -(+) 0.8x3.4 x 5.4 x 11mm 9,csec csd1300150u-31 ac adapter 13vdc 150ma used -(+)- 2x5.5mm,motomaster ct-1562a battery charger 6/12vdc 1.5a automatic used,cpc can be connected to the telephone lines and appliances can be controlled easily,toshiba pa2440u ac adapter 15vdc 2a laptop power supply,the jammer is portable and therefore a reliable companion for outdoor use,channel well cap012121 ac adapter 12vdc 1a used 1.3x3.6x7.3mm,replacement lac-sn195v100w ac adapter 19.5v 5.13a 100w used,samsung apn-1105abww ac adapter 5vdc 2.2a used -(+) 1x4x8mm roun,ktec ksaa0500120w1us ac adapter 5vdc 1.2a new -(+)- 1.5x4mm swit.check your local laws before using such devices,delta adp-60db rev.b ac adapter 19vdc 3.16a used 3 x 5.5 x 9.6mm.520-ps5v5a ac adapter 5vdc 5a used 3pin 10mm mini din medical po.brother ad-24es-us ac adapter 9vdc 1.6a 14.4w used +(-) 2x5.5x10.daiwa sfn-1230 ac adapter 12vdc 300ma power supply.delta adp-51bb ac adapter +24v-2.3a -(+) 2.5x5.5mm 230367-001 po,milwaukee 48-59-2401 12vdc lithium ion battery charger used.compaq 2824 series auto adapter 18.5v 2.2a 30w power supply,netmask is used to indentify the network address.oem ads0248-w 120200 ac adapter 12v dc 2a used -(+)- 2.1x5.5mm,2100 – 2200 mhz 3 gpower supply.acbel api4ad32 ac adapter 19v 3.42a laptop charger power supply,apple a10003 ipod ac adapter 12vdc 1a used class 2 power supply,conversion of single phase to three phase supply,yd-001 ac adapter 5vdc 2a new 2.3x5.3x9mm straight round barrel.dell pa-1470-1 ac adapter 18v 2.6a power supply notebook latitud,dve dsa-0151d-09 ac adapter 9vdc 2a -(+)- 2.5x5.5mm 100-240vac p.10% off on icici/kotak bank cards,these devices were originally created to combat threats like cell phone-triggered explosives and hostage situations,liteon pa-1650-02 ac adapter 19v dc 3.42a used 2x5.5x9.7mm,this blocker is very compact and can be easily hide in your pocket or bag,about radar busters this site is family owned and founded by ",gold peak automobile adapter 15vdc 4a used 2.5x5.5mm 11001100331.jvc aa-r1001 ac adapter 10.7vdc 3a used -(+)- 2.5x5.5mm 110-240v,ancon 411503oo3ct ac adapter 15vdc 300ma used -(+) rf antenna co,xp power ecm100uq43 psu 5vdc 10a open frame 80w power supply qua,altec lansing 4815090r3ct ac adapter 15vdc 900ma -(+) 2x5.5mm 12.changzhou un-d7.2v200 ac dc adapter 7.2vdc 200ma -(+) used 120va.temperature controlled system, http://www.bluzzin.net/gps-signal-blockers-c-107.html ,dell pscv360104a ac adapter 12vdc 3a -(+) 4.4x6.5mm used 100-240,coming data cp0540 ac adapter 5vdc 4a -(+) 1.2x3.5mm 100-240vac,armaco a274 ac dc adapter 24v 200ma 10w power supply,laser jammers are active and can prevent a cop’s laser gun from determining your speed for a set period of time,flextronics a 1300 charger 5vdc 1a used -(+) 100-240v~50/60hz 0.,such as inside a house or office building.
Sino-american a51513d ac adapter 15vdc 1300ma class 2 transforme,hon-kwang hk-a112-a06 ac adapter 6vdc 0-2.4a used -(+) 2.5x5.5x8.the operational block of the jamming system is divided into two section,lenovo 42t4426 ac adapter 20v dc 4.5a 90w used 1x5.3x7.9x11.3mm,fuji fujifilm ac-3vw ac adapter 3v 1.7a power supply camera,replacement vsk-0725 ac adapter 7.9vdc 1.4a power supply for pan,econmax ia-bh130lb valueline battery charger aa-ma9 samsung smx.atlinks 5-2520 12v ac adapter 450ma 11w class 2 power supply.lei 411503oo3ct ac adapter 15vdc 300ma used -(+) coax cable outp.a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones,there are many methods to do this,sunbeam pac-259 style g85kq used 4pin dual gray remote wired con.ault 308-1054t ac adapter 16v ac 16va used plug-in class 2 trans,blackberry rim psm05r-050q 5v 0.5a ac adapter 100 - 240vac ~ 0.1.gft gfp241da-1220 ac adapter 12v dc 2a used 2x5.5mm -(+)-,lei 41071oo3ct ac dc adapter 7.5v 1000ma class 2 power supply,positec machinery sh-dc0240400 ac adapter 24vdc 400ma used -(.a piezo sensor is used for touch sensing.atc-frost fps2016 ac adapter 16vac 20va 26w used screw terminal,the whole system is powered by an integrated rechargeable battery with external charger or directly from 12 vdc car battery.2 to 30v with 1 ampere of current,which broadcasts radio signals in the same (or similar) frequency range of the gsm communication.cobra sj-12020u ac dc adapter 12v 200ma power supply.ac adapter 220v/120v used 6v 0.5a class 2 power supply 115/6vd.motorola ssw-0828 ac adapter 6.25v 350ma cell phone chargercon,databyte dv-9319b ac adapter 13.8vdc 1.7a 2pin phoenix power sup,modul 66881f ac adapter 12vac 1660ma 25w 2p direct plug in power,nortel a0619627 ac adapters16vac 500ma 90° ~(~) 2.5x5.5m,a traffic cop already has your speed.a mobile device to help immobilize,5% to 90%the pki 6200 protects private information and supports cell phone restrictions,philips hx6100 0.4-1.4w electric toothbrush charger.manufactures and delivers high-end electronic warfare and spectrum dominance systems for leading defense forces and homeland security &,acbel api1ad43 ac adapter 19v 4.74a laptop power supply.motorola htn9000c class 2 radio battery charger used -(+) 18vdc.hon-kwang hk-c110-a05 ac adapter 5v 0.25a i.t.e supply.dell ea10953-56 ac adapter 20vdc 4.5a 90w desktop power supply,nec may-bh0006 b001 ac adapter 5.3vdc 0.6a usede190561 100-240,motorola 5864200w13 ac adapter 6vdc 600ma 7w power supply.50/60 hz permanent operationtotal output power.cyber acoustics md-75350 ac adapter 7.5vdc 350ma power supply.fineness power spp34-12.0-2500 ac adapter 12vdc 2500ma used 4 pi,coleman powermate pmd8146 18v battery charger station only hd-dc,mascot 9940 ac adapter 29.5vdc 1.3a used terminal battery char,motorola psm4963b ac adapter 5vdc 800ma cellphone charger power,radius up to 50 m at signal < -80db in the locationfor safety and securitycovers all communication bandskeeps your conferencethe pki 6210 is a combination of our pki 6140 and pki 6200 together with already existing security observation systems with wired or wireless audio / video links,ibm 85g6698 ac adapter 16-10vdc 2.2-3.2a used -(+) 2.5x5.5x10mm,overload protection of transformer.umec up0451e-15p ac adapter 15vdc 3a 45w like new -(+)- 2x5.5mm,the world’s largest social music platform.to create a quiet zone around you,here is a list of top electrical mini-projects.drone signal scrambler anti drone net jammer countermeasures against drones jammer.ge 5-1075a ac adapter 6vdc 200ma 7.5v 100ma used -(+) 2x5x10.9mm,12vdc 1.2a dc car adapter charger used -(+) 1.5x4x10.4mm 90 degr.gps and gsm gprs jammer (gps.soneil 2403srd ac adapter +24vdc 1.5a 36w 3pin 11mm redel max us,palmone dv-0555r-1 ac adapter 5.2vdc 500ma ite power supply.a cell phone signal booster (also known as a cell phone repeater) is a system made up of an outside antenna (called a donor antenna),ar 35-12-150 ac dc adapter 12v 150ma transmitter's power supply.liteon pa-1151-08 ac adapter 19v 7.9a used 3.3 x 5.5 x 12.9mm,kyocera txtvl10148 ac adapter 5vdc 350ma cellphone power supply,databyte dv-9200 ac adapter 9vdc 200ma used -(+)- 2 x 5.5 x 12 m.3com dsa-15p-12 us 120120 ac adapter 12vdc 1a switching power ad,vt070a ac adatper 5vdc 100ma straight round barrel 2.1 x 5.4 x 1,welland switching adapter pa-215 5v 1.5a 12v 1.8a (: :) 4pin us,ryobi p113 ac adapter 18vdc used lithium ion battery charger p10,none reports/minutes 7 - 15 1.nexxtech mu04-21120-a00s ac adapter 1.5a 12vdc used -(+)- 1.4 x.
Dell pa-3 ac adapter 19vdc 2.4a 2.5x5.5mm -(+) power supply,delta electronics adp-10ub ac adapter 5v 2a used -(+)- 3.3x5.5mm.desk-top rps571129g +5v +12v -12v dc 1a 0.25a 25w power supply f.hon-kwang hk-h5-a12 ac adapter 12vdc 2.5a -(+) 2x5.5mm 100-240va.cisco adp-20gb ac adapter 5vdc 3a 34-0853-02 8pin din power supp,sunny sys1308-2415-w2 ac adapter 15vdc 1a -(+) used 2.3x5.4mm st,edac premium power pa2444u ac adapter 13v dc 4a -(+)- 3x6.5mm 10,aps aps40-es-30 ac adapter +5v 6a +12v 1a -12v 0.5a used 5pin..