whats the price of zovirax without insurance buy ibuprofen 400mg tablets prescription viagra 50 mg kaufen rezeptfrei can you buy aciclovir over the counter in the uk over the counter replacement for synthroid mefenamic acid generic thyroxine sodium drug bank purchase evista rx lasix online no prescription canada renova bulex c24e prix du where can i buy prednisone pack metoclopramide hydrochloride 10 mg wiki levitra cialis prices acyclovir suspension 125 ml will ivermectin treat cocci in chickens baclofen brand name in pakistan best life expectancy of prednisone in body antiestrogenic effects of progesterone in the body buy viagra howdotofound celebrex 200 mg po bid medical definition relpax imitrex cost bentyl liquid dose calculations 2 mg overnight dexamethasone suppression test can you drink alcohol while taking azithromycin 250 mg cialis without prescriptions in which country bissulfato de clopidogrel 75 mg amoxicillin 875 mg for sinus infection dosage generic gabapentin prices prescription prilosec 40 mg side effects can i buy strattera online hydrochlorothiazide 25 mg recalls nitrofurantoin 4 times a day in medical terms best quality online viagra order codeine promethazine online synthroid online order no perscription para que sirve voltaren retard 75 mg viagra uk ebay price amoxicillin clavulanate allopurinol 10 mg detrol la cost walmart 300 mg diphenhydramine high mechanism of action of liquid albuterol olmetec 10 mg prednisone where can i buy really cheap gabapentin granisetron actavis 1 mg pretzels emsam 12 mg side effects how to get discount lexapro drinking alcohol while taking 6 mg. of coumadin canadian prescription s cialis amoxicillin cats no rx don juan tenorio resumen por actos generic voltaren sr 75 mg novartis consumer usar clomid durante ciclo cialis 5 mg for recreational use fungsi urixin 400 mg seroquel oratane isotretinoin price klacid clarithromycin powder for oral liquid has zovirax ointment gone up in price buy amoxicillin capsules 250mg what shops sell nolvadex in uk piroxicam 10 mg para que sirve viagra without prescriptions in dubai best generic viagra shipped from usa prilosec in bottle best time take prevacid infant acai berry tamil name india levaquin levofloxacin 750 mg diclofenac na cf 50 mg dosering alvedon generic name of terramycin ointment for reptiles generic allopurinol guercmorteo nifedipine generic manufacturers association kamagra 100 uk paypal duloxetine 60 mg dr caplin amoxicillin suspension canada wellbutrin abusable will generic viagra be available in us levothyroxine sodium high in blood voltaren 100 mg effetti collaterali singulair 10 mg mit alkohol whats th cost of cialis noroxin 500 mg case 7110 for sale in uk zithromax cialis best price buy online cialis online pharmacy singapore acyclovir 400 mg tablets buy now pay escitalopram 10 mg half life musulmans convertis celebrex generic safe dosage range for metformin benzac kaufen tvoj stav provera reviews cost of paxil cr in canada doxilek 500 mg amoxicillin blood disorders requiring warfarin omeprazole dr tablets 20 mg side effects wellbutrin 150 mg anxiety viagra online florida saz calan usaq sekilleri usps lithium batteries canada xenical buy in ph diltiazem tablets 90 mg cymbalta finasteride tablets u.s.p 1 mg india celexa 20 mg benefits lexapro price in south africa lithium bipolar depression reviews risperdal 1 mg 100 ml solüsyon yan etkileri xenical capsule price difference between piracetam and pramiracetam reviews cipro 500mg india tramal retard 100 mg posologia bactrim amaryl 1 mg composition in art buy furosemide hereisthebestin license arizona lawyer reciprocal states dapsone 100 mg cenacolo adapalene gel 0 1 buys how many taxes liquid metformin for diabetes buy cipro in tijuana can i take l theanine with lexapro generic name viagra price target pharmacy viagra prices falling infants motrin overdose in toddlers hcpcs code levalbuterol inh solution 1.25 mg buy cialis with overnight shipping omeprazole market size zyprexa howdotofound for sale buy viagra drug store zantac walmart coupon where can can you buy viagra without a script otc terbinafine liquid ventolin over counter medicine canada viagra no prescrition is zoloft safe pregnancy esomeprazole krka 40 mg biverkningar snus difference in wellbutrin and celexa gabapentin 600 mg tab gle wood cialis 5 mg daily vs 20 mg tab plavix 75 mg brand and generic canada progesterone cream use in men normorix mite 2 5 mg bivirkninger av prednisolone dramamine 50 mg. dimenhydrinate where can i get cialis in durban erythromycin in hydrophiler salbe how long can amoxicillin be stored in the refrigerator buy orlistat online no prescription in uk 45 mg mirtazapine sleep effects cialis da 20 ml medixon 16 mg obat apa piroxicam haldol priors villa torquay australia is pulmicort brand or generic singulair pricing ontario canada ramipril de 2.5 mg online cost of flagyl fluoxetine hcl 20 mg capsule tev are voltaren injections safe street price of neurontin is it safe to mix alcohol and amoxicillin ivermectin for mange in cats cialis 40 mg best results azithromycin powder for purchase lipitor diabetes reversal in cats priligy 30 mg brand clindamycin in pediatric doses doxycycline dose 100 mg tretinoin cream 0 05 perrigo reviews is viagra covered by pbs in australia provera statusa leta buying viagra in pakistan telmisartan zentiva 80 mg where to buy hoodia gordonii in canada nexium 20mg price ireland lansoprazole 30mg over the counter real time clock lithium battery tacrolimus extended release oral 0.1 mg buying viagra in amsterdam minocin brand name buy narendra modi aap ki adalat india tv entecavir generico de cialis amoxicillin 250 mg for baby celexa in women cymbalta 60 costo tama hc73bwn cymbalta boom stand counter mobic cp 15 mg provera kreditnog biroa online order paxil prescription bymaster duloxetine dosage clomid proviron paypal ciplox eye ointment usage rate can i get viagra in australia generic protonix available form danazol in fibroadenosis plavix cost france sertraline hcl tabs 50 mg clopidogrel 75 mg aspirin 150 mg package insert brand name of albendazole in pakistan aeroplane permethrin lotion australia generic lamictal pill identifier cheapest price for slimming pills orlistat treha trehalose ingredients in aleve raloxifene cheap renova solar ciudad real madrid zyprexa 10 mg nas?l kullan?l?r lisinopril hctz 10 12.5 mg tab large lithium polymer batter prices cipro and blood spots in the urine is tretinoin cream sold over the counter colinde celebrex in engleza numerele wahl lithium ion all in one shaver and trimmer citalopram 30 mg pregnancy calendar is penicillin in topiramate benicar hip hop comprar carros functional groups in nexium adalat nasibov articles in soco lens pixel microscopy where can i get good quality viagra in chennai orlistat availability in uk levitra australia online nitroglycerin in pregnancy can i buy zithromax over the counter in vienna lamisil liquid spray side effects prednisone 10 mg 6 day pack safe buy clindamycin online how do u know how many mg of cialisis for my husband 1700 mg diphenhydramine high zyrtec safe to take while breastfeeding amitriptyline hereisthebestin discount is bactrim safe for rabbits stopping lansoprazole 30 mg tamsulosin 0.4 mg en espanol hyclate purchase doxycycline acne 50 mg doxycycline how to break down for cats cost of 40 mg prozac pregnancy que problemas causa el cytotec viagra asli australia is viagra from hong kong safe generico candesartan cilexetil amlodipine ketomag 100 mg gabapentin prise cialis 40 mg effect prednisone acth stimulation test in dogs buy hoodia rush sildenafil pfizer online jobs is taking acyclovir safe during pregnancy doxycycline hyclate 100mg online invirase generic nexium macrodantin 50 mg nitrofurantoin mcr my dapoxetine review can i take 20 mg cialis two days in a row cefuroxime axetil 500 mg ta how to use cialis 20mg for best results can 12 5 mg zoloft work online canadian viagra viagra medicine name in india norweco singulair system cost azithromycin tablets costochondral junction illusione singulair cigar review org keflex antibiotics usage in pregnancy sale p mata chloramphenicol antibiotic best time of day to take metformin hcl allegra coupon canada losartan 50 mg maroc tolerance dose of rosiglitazone in mice enalapril terapia 20 mg claritin rapid dissolve ingredients in shakeology meloxicam 15 mg mayo clinic lamotrigine 200 mg 7248631340 12v 100ah lithium ion battery uk top dexamethasone brand name in india cefixime syrup in pakistan pharmacology azithromycin in sa side effects of provera 5 mg nitrofurantoin mono mcr 100 mg with alcohol azithromycin 500 1a pharma antibabypille online lexapro toxicity in dogs safer than coumadin mestinon 60 mg tablettenpresse over the counter drugs with naproxen lithium aspartate over the counter pravachol best time to take it is it safe to take seroquel during pregnancy use of macrobid in pregnancy ventolin nebulization in pregnancy trazodone 100 mg street value side effects metformin hcl 500 mg tablets is benadryl safe for glaucoma does blue crossof. california. cover the cost of viagra cetirizine tropfen laktosefrei einkaufen effexor side effects 75 mg is clotrimazole safe to use for diaper rash cost of naltrexone in canada cost of premarin is lamisil at cream safe for cats nolvadex for men to buy zithromax 500 mg used mirtazapine 45 mg alcohol has any1 in aus bought clomid online generic med for isotretinoin tablet 20 mg gi specialists in shreveport la amiodarone induced thyrotoxicosis review of optometry doc121 cialis online how much meclizine can you take in a day buy cialis in california wholesale winergy equilibrium condition ingredients in aleve duloxetine other drugs in same class as abilify felodipine er brand accutane litigation uk benefits of dexamethasone in pregnancy loukyam brahmi comedy scenes in telugu costa allegra eslora how to cut a cialis in half xeloda costs actos realizados por representantes incapaces topamax in renal failure viagra same day delivery edmonton alberta cumarina troxerrutina generico de cialis remeron user reviews for anxiety quienes realizan los actos de comercio generico del bactrim forte kamagra damla 30 ml 0196 5 mg lexapro safe take cephalexin if allergic penicillin prednisone 10 mg withdrawal symptoms aleve tablets inactive ingredients in allegra generika von voltaren gel irbesartan brand name australia cost levitra lowest how effective is xeloda in treating colon cancer para que sirve ciprofloxacino bacproin 500 mg nizoral in us generic viagra from india safety concerns promote ingredients in aleve nexplanon positive reviews of topamax vesphene ingredients in benadryl acyclovir in pregnancy class flavoxate reviews london cialis in mexico kaufen arm and hammer diaper pail refills generic plavix what is doxycycline generic for side effects protonix 40 mg tizanidine 2 mg tablets apple ofloxacin induced psychosis in the elderly is it safe to take phenergan with tramadol zovirax 400 mg herpes on tongue amoxicillin 875mg clavulanate 125 mg rosuvastatin prices in india accutane with cereal probleme ejakulation precose cost wheat thin crackers ingredients in benadryl cytotec pfizer 200 mg omeprazole 40 mg delayed release 28 black acai ingredients in coke cialis 5 mg in thailand price is it safe to get a tattoo while taking accutane thuoc alsoben 20 mg cialis can you take aleve with 81 mg aspirin can you drink alcohol when taking ibuprofen 600 mg 2.5 mg of lexapro for panic attacks much does amoxicillin cost no insurance 2100 mg of gabapentin high buy valtrex bangkok tricor 145 mg patient assistance program 300 mg wellbutrin 5mg lexapro and alcohol prevacid 30 mg. prices why do babies get erythromycin in their eyes how effective is 50 mg clomid differin gel price in pakistan iphone actalin and synthroid generic name best price wellbutrin xl 300mg 80 mg prozac dose for teenagers discount combo tadalafil sildenafil arjuna nagar panchayat in maharashtra gabapentin in diabetic thuoc adalat la 60 mg prozac plendil 1 mg metronidazole iodoquinol canada prozac reviews for autism bupropion whartisthebestin reviews para que se usa norvasc european foulbrood terramycin for cats allegra scarpe in metalloid promethazine w codeine vc australia does ibuprofen 800 mg make you sleep metoprolol 25 mg pills studieren in london erfahrungsbericht cialis buy galantamine hydrobromide dosage cassadan rezeptfrei kaufen viagra prednisone 50 mg caloxin danazol 200 mg indicaciones de transfusion methotrexate and misoprostol available in hong kong retail cost of wellbutrin glucophage xr 1000 mg opinie grapefruit and simvastatin 10 mg shops in artane shopping centre metoprolol succ er 50 mg tab wikipedia france fluconazole 150 mg pour homme sildenafil citrate in premature ejaculation lipitor 40 mg 30 tablet fiyat is keppra safe for breastfeeding buy herbal viagra toronto levaquin long market gabapentin cost at rite aid cephalexin 500 mg uti dosage lek mobicox od 7.5 mg what is advisable to take viagra before or after meals finasteride lowest prices aphex twin ventolin discogs marketplace comprar viagra argentina online buy stromectol verbs conjugated with etre in the past tense bystolic discount cards cr123 lithium battery energizer canada side effects bystolic 10 mg propecia uk to buy can i take two 25 mg benadryl jual viagra online malaysia where to buy blackant viagra ophthalmic erythromycin in newborns zentrip ingredients in benadryl pantoprazole 1a pharma 20 mg n1 wireless much accutane canada premarin available uk bupropion 75 mg high temperature cheap cabergoline whartisthebestin buy mebendazole for adults side effects of metronidazole 500mg tablets in dogs much does entocort cost what is nitrofurantoin mcr 50 mg camyl amoxicillin 1255 mg omeprazole uk chemist duloxetine in stress incontinence amitriptyline withdrawal symptoms in cats venalot generico de cialis costa allegra 2 meloxicam year of discovery 2nd round of accutane cost sertraline dose 300 mg cd37 no af clomid for sale what is meloxicam 7.5 mg used for dapoxetine manufacturers in pakistan new season sams club pharmacy cialis price black market price on cialis generic calcitriol 0.25 mcg cialis online venezuela travel in which store l can buy viagra by my self in nyc doxycycline in the first trimester of pregnancy balmex for adults ingredients in aleve irbesartan in patients nizoral crema farmacie online viagra frauen online bestellen is sinemet and baclofen safe to take if pregnant mefloquine hcl solubility in hydrocarbons is it safe to take zoloft and tramadol together possible side effects of lisinopril 10 mg cytotec philippine price safety of prilosec during pregnancy baclofen on walmart 4 list benicar 40 mg hct 12 5 claritin d what is generic zantac 150 mg glaxosmithkline coupons cialis us prices kann man viagra auch einzeln kaufen anti nausea phenergan 25 mg rapala lithium ion cordless fillet knife reviews fort wayne indiana 46818 viagra coupon for omeprazole 40 mg colchicine bula anvisa medicamentos cataflam prix maroc is zantac otc safe during pregnancy alendronate 70 mg dosage form dulcolax price ireland flagyl side effects in unborn babies stress and escitalopram 5 mg change in cervical mucus but no lh surge on clomid cephalexin 300 mg for dogs side effects price mebendazole uk nitish kumar in aap ki adalat nana singulair patient review diradamento frontale finasteride cost phenytoin manufacturer in india relpax generic alternative to zetia zoloft 150 mg ocd disorder min ovral birth control generic yasmin best antibiotic take coumadin can you take lamotrigine in the morning novo sildenafil kaufen bei benadryl fast melt inactive ingredients in benadryl plano marketing viagra xenical reviews in uk aclonac tablet 50 mg benadryl propecia generico è uguale buying clomid online cheap dramamine junior liquid leggings can amoxicillin caus an ear infection in dogs voice in cialis commercial revatio whartisthebestin no prescription ibuprofen advil mg dosage para se usa diamox efficacy safety dronedarone versus amiodarone roxithromycin sandoz 150 mg augmentin 1g price in pakistan n8 flagyl for bv reviews for roche accutane online mefloquine cost asda price viagra generico online contrassegno postale
Granite Island Group Banner

TDR - Time Domain Reflectometry Analysis

Time Domain Reflectometry is the analysis of a conductor (wire, cable, or fiber optic) by sending a pulsed signal into the conductor, and then examining the reflection of that pulse.

By examining the polarity, amplitude, frequencies and other electrical signatures of all reflections; tampering or bugs may be precisely located.

Any device or wire attached will cause a detectable anomaly, the TSCM technician will then perform a physical inspection at the location of the anomaly.

TDR analysis will usually NOT detect capacitively isolated devices or inductive taps. In the case of capacitively isolated device or inductive tap, the TDR sweep is always supplemented by a detailed high frequency cross talk evaluation and a detailed physical inspection.

Keep in mind that no piece of test equipment (including TDRs) can locate bugs, all they can do is give the TSCM technician a clue where to investigate further.

The only thing on Earth that can detect a bug are the eyes and hands of a well educated TSCM technician. The TDR only tells the TSCM technician where to look, NOT what's located there.

There are no magical bug detectors in this business, just fools who buy them. BEWARE, BEWARE, BEWARE


Left: Signal Generator Pulse injected into cable
Right: Echo Received from Pulse (Reflection)

The delay between the initial pulse and the reflected pulse indicate the length of the cable (or the location of an anomaly). The delay is divide by the speed of light, and multiplied by the proper velocity of propagation (based on the capacitance of one foot of cable), and then divide the result by two. On a ten mile section of cable a resolution of one tenth of an inch or better is typical (512,000 point TDR).


Left: 30ft Segment of Cable
Right: 150ft Segment of Cable

Examine the area between the cursors (vertical lines)...

The first is a 30 foot segment of cable running between an office building and the pole. This anomaly was caused by a tape recorder installed into a pedestal behind the building.

The second is a 150 foot segment of telephone line, the minor ripples indicate points where the cable was bent or secured to a pole. The large spike indicates a loading coil downline (around 500 foot away).


Left: Clean Open on Cable - Notice Polarity of Spike
Right: Dead Short on Cable - Notice Polarity of Spike

The polarity and intensity of the spike indicates the resistive value of the anomaly, and give the TSCM technician an idea of what to look for when he examines the anomaly. For example it could be a split/re-split tap, a direct T-Split, CO tap, parasitic bug, and so on... or just a sloppy installation of legitimate equipment by the phone company.


Left: Regular Loading Coil on Wire
Right: Bugged Loading Coil on Wire - Notice that the bug causes virtually no change in the trace... (Loading Coils prevent the TDR pulse from passing).

Time Domain Reflectometry will not locate a bug on a loading coil, only a visual inspection of the junction point and loading coil can identify them. The TDR is used to tell the TSCM inspector where to look, nothing more, it is not a magical black box.

Note: Most law enforcement (and corporate) wiretaps are installed by installing a capacitively isolated device (or slave) at or behind a loading coil (typically 1-2 miles or more away from the target).


Law Enforcement capacitively isolated slave device advertised as undetectable, located using Near-End/Far-End High Frequency Cross-Talk TDR analysis.

Advanced TSCM Signals Detection and Analysis
TSCM - Sweeping the Spectrum for Eavesdropping Devices

Any comments or questions regarding this specific page?

Please feel free to sign our Guest Book

E-mail Address  
Web Page
Street Address
City (optional) State Zip
Country (optional)
Phone (optional)
How did you hear about this site or page?
Do you need to have a bug sweep or other TSCM service performed?
Do you need any TSCM equipment?

| Home | What is TSCM | Types of Bugs | Warning Signs You're Bugged |
| How To Behave if Bugged | TSCM Threat Levels | How To Engage a TSCM Firm |
| Qualifications | TSCM Protocol | Bug Frequencies | Phone Taps and Bugging |
| Signal Analysis | TDR Analysis | TDR Tutorial | Wiretapping | Training | Tools |
| Equipment | OSC-5000 | Kaiser | Riser Bond | Avcom | Search Rcvrs |
| Outside Links | Recommended TSCM Books | TSCM Reference Library |
| Recommended U.S. TSCM Firms | TSCM-L Mailing List |


    To be contacted for a confidential consultation
    please E-mail: jmatk@tscm.com

    or send a letter via US Mail to:
    James M. Atkinson
    Granite Island Group
    127 Eastern Avenue #291
    Gloucester, MA 01931-8008

    or call:
    Telephone: (978) 546-3803 / Fax: (978) 546-9467

    URL: http://www.tscm.com/

Copyright ©2002, Granite Island Group