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AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04) 
D
ETECT
IV User Manual
AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04) 
7
I
NTRODUCTION
D
ETECT
IV is a sophisticated search tool integrating four 
detection sensors to provide a more complete and robust 
method of detecting electronic eavesdropping devices.
Four tried and tested detection methods: Harmonic receiver, broadband detector, Non-linear 
junction detector and metal detector are integrated into one compact, easy to use unit.
Combining four complementary sensor systems together means more effective and efficient 
search capability. With just one physical sweep of a target area four separate searches are  carried 
out. 
D
ETECT
IV automatically switches between the four sensors using each detection method 
in turn, five times a second, allowing a continuous display of all detector activity.
Each sensor provides information which combines to provide a comprehensive picture of 
any concealed targets. 
D
ETECT
IV presents the multisensor information in a simple, easily 
understood bar graph display. Additional expert screens give access to more detailed information 
for each of the sensors. Using multiple detector information in this way improves detection and 
gives more accurate identification between false alarms and real targets.
The Unit
The 
D
ETECT
IV unit, shown opposite, is a hand-held case with a paddle shaped search head on 
an extendable arm. Controls are grouped next to the handle for convenient thumb operation and 
information is presented on a tilt-able TFT LCD touch-sensitive screen.
The input and output ports are grouped together under the tail of the unit along with the battery 
compartment. The On /Off switch, audio output and headphone socket are conveniently located 
at the top of the unit tail.
Handling
The extendable search head contains all the 
D
ETECT
IV sensors and during a sweep search 
needs to be passed close to all parts of a target area. Rotatable on two axis the head can be 
twisted to provide the best attitude and position for searching most surfaces. The extendable arm 
provides convenient access for the difficult to reach parts of a typical target area, for example, 
ceilings and under desks. To minimise strain the unit has provision for a shoulder strap allowing 
D
ETECT
IV to be handled like a guitar and is designed to be balanced with the search head arm 
extended approximately half way.  The tail of the unit is also designed to provide a convenient 
handle to control the unit when searching high surfaces.