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The sound mode allows the operator to listen to the signal so that he or she can
understand more about the source. The FM-modulated transmitter (bug) can
produce a 'loopback effect' when the unit is close to it or cause the effect of
the disappearance of background noises, which are usually present further away
from the transmitter. In this case the 'hum' which can be heard in other parts of
the room can disappear when the Protect 1206i approaches the transmitter and
there is a silence on the speaker. In this case it is recommended to use the 'CORR'
function (10) while watching the DEMODULATION' display (3). Simultaneous
fluctuations will warn of the danger.
Step 2. Scanning the area
Enter the room holding the Protect 1206i while watching its bargraph or paying
attention to the vibrator. Turn the lights and other equipment in the room on and
off. Walk around the room, continuously watching the indicator or feeling for the
Protect's vibration. The bargraph level will increase or decrease when the detector
is closer to, or farther away from a transmitting device. Probe all objects which may
contain a hidden surveillance device. When you get close to an RF bugging device
the bargraph of your Protect 1206i will rise (or the vibration will appear). Pay
special attention to the places where an AC exists as a bug can be powered from it
(AC outlets, AC lines, electrical appliances, etc).
The distance of detection may vary depending on the situation. Usually the
Protect 1206i is able to detect an average radio microphone at a distance of
30-100 cm, although it is recommended to probe objects at a proximity of 10 cm.
The bargraph can display 16 different levels.
In the case of detecting an increased level, try to find where it is the strongest.
Move the detector in different directions and/or rotate it. Turn on the attenuator
near a strong source when the bargraph lights fully. It will drop and then increase
further, therefore making it possible to locate more precisely. Do not forget to
restore the normal sensitivity of the device before continuing the search by turning
the attenuator off.
Step 3. Checking a suspicious place
The bargraph may often show an increased level near wires or metal objects such as
building constructions. This may not be a bug, but rather the metal acting as an
antenna extension. A similar situation may appear in the apertures of windows due
to radio waves coming from the outside. This interference does not usually have a
concentrated area and exists within a large expanse, whereas a bugging device will
have an area of a strong and concentrated field in a more local area.
After you have found the exact location of a high field, perform the following
actions:
1) If secrecy is not critical turn on the sound mode and listen to the sound. Check
for the presence of a loopback effect or the effect of the disappearance in back-
1) For covert procedures use the vibration or silent mode
2) The sound mode is more convenient for locating and inspecting the RF source.
3) The vibrating or mixed mode allows the operator to avoid constantly
watching the bargraph when inspecting areas that are difficult to access
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