Online Check Investigations
Empire Pacific Investigative Services
episonline.com

Licensed Private Investigators 
Nationwide Toll Free 888.404.3747
License Number: PI 16166

ELECTRONIC COUNTERSURVEILLANCE

Covert Transmitter. This piece of equipment transmits to a listening post (where appropriate recording devices will be installed) all sounds (in particular conversations) generated in one or more rooms.

Telephone transmitters instead intercept conversations (or fax-data transmissions) through telephone lines and frequently drain their operational power directly from the line. Due to absence of a battery (that needs to be periodically substituted), these types of transmitter are particularly dangerous as their "operational life" is practically unlimited.

When audio interception is not sufficient, covert video-cameras can be used to transmit live video via radio or wire.












Covert radio transmitters usually use traditional modulation (AM or FM) systems, however particularly advanced transmitters will use advanced digital systems (Infinity, Frequency Hopping, Burst, Agile, Spread Spectrum). In this case, only the use of dedicated instruments   (Digital Spectrum Analyzers and Non Linear Junction Detectors) by specialized technicians will reveal their presence as more common frequency counters or broadband receivers will not be sufficient. 

Running specialized software on a Computer controlled Digital Spectrum Analyzer gives us the possibility to document and memorize the radio spectrum conditions of the area to be swept.

Switched-off or no longer functioning surveillance devices can only be indicated by use of a Non Linear Junction Detector. This expensive instrument is not commonly found in Europe and for maximum effectiveness must be used by properly trained investigative technicians.

Bug sweeping of telephone, electrical and data lines, in particular when the analysed cable is of a length of hundreds if not thousands of metres, can only be conducted by means of a particular instrument called Time Domain Reflectometer (TDR). This piece of equipment can check any type of line (even under power) and indicates on a display screen the presence of abnormalities (short circuits, open circuits, series or parallel connections, inductances, capacities, etc.) and/or parasites. Presence of abnormalities (short circuits, open circuits, series or parallel connection

Our digital Time Domain Reflectometer has a range of over 11.000 metres with a localization precision of about 20/30 centimetres. This instrument is indispensable when the examined line is very long (try to imagine the route that a cable follows from a telephone switchboard in the basement of a large building to a phone located at the top floor) and not easily accessible (passing through walls, third party property, roads, etc.)

WARNING SIGNS

1.      Non authorized persons are aware of personal or secret facts and documents. 

2.      Non authorized persons are aware of personal or secret facts.

3.      Confidential meetings, documents, projects and tenders are no longer secret.

4.      Strangers are award of when or where you are.

5.      You have noticed unusual sounds, noises or changes of volume on your telephone line.

6.      An unexpected gift or appliance has appeared in your office or home.

7.      Suspect vehicles are frequently parked in the vicinity of your office or home.

8.      Your telephone produces strange noises even when the receiver is "On-Hook".

9.      You have noticed unexplained variations in the physical structure of you office or home (moved furniture, power suppliers, fixtures, carpeting, tiling, etc.)

10.  Your Hi-Fi or TV system is subjected to strange interferences.

11.  Utility technicians (electrical, telephone, water, hearing, etc.) appear for un-requested or non programmed maintenance calls.

12.  An un-authorized person has entered your offices or home, but nothing has been stolen.

If you recently have noticed one or more of these warning signs, you may be the object of covert surveillance. If you decide to contact us for a consultation or counter-surveillance sweep talk about your decision only with who must know and call us from a secure phone that is not situated in the suspect offices or home.

HOW A COUNTER-SURVEILLANCE SWEEP IS CONDUCTED

• Upon arrival at the sweep site with our mobile counter-surveillance laboratory (designed for Europe-wide travel), our Investigative Technicians will conduct a number of inspections that for logistic and security reasons are preferably carried out during weekends or after normal office hours:

• Radio-spectrum analysis from VLF to SHF frequencies in order to identify covert audio or video transmitters using anymodulation system, either analog or digital.

• Electronic and physical examination of all telephone systems and switchboards in order to identify covert listening systems.

• Electronic and physical exam of all rooms, furniture and fixtures with a Non Linear Junction Detector in order to identify covert electronic circuits, of any nature, even switched off or no longer functioning.

• LASER and Infra-Red spectrum analysis in order to identify surveillance systems using these band spectrums.

• Electrical and Electronic cable examination and Acoustic leak examination.

• Physical structure examination of the entire site in order to verify its global degree of security.

• Computer security examination in order to verify the presence of surveillance software or hardware applications, Virus check and hacker protection check.