Selcom Security ST 401 CAYMAN Manual de usuario
PORTABLE
NONLINEAR JUNCTION DETECTOR
ST 401 CAYMAN
OPERATING MANUAL
CONTENTS
pg.
1. Description 3
1.1. Purpose 3
1.2. Delivery package 3
1.3. Main Technical Specications 4
1.4. Principles of Operation 5
1.5. Operation Modes 5
1.6. Structure 6
1.6.1. Antenna Module 6
1.6.2. Main Unit 8
2. Use 9
2.1. Preparation 9
2.2. Adaptive Mode 10
2.3. Operational check with test dummies 10
2.4. Manual Gain Control 11
2.5. Listening (Audio Mode) 33
2.6. Program Updates 15
3. Power Supply 15
4. Operating Restrictions 16
5. Storage and Transportation 16
6. Warranty 16
2
This operating manual contains important technical information and guidance on proper use
of the product. Please read the manual before using ST 400 Cayman.
1. Description
1.1. Purpose
ST 401 CAYMAN is intended to detect and locate
• eavesdropping electronics
• mobile phones and SIM cards
• any other devices utilising semiconductor technology
ST 401 allows detecting electronic devices, whether active or not, as well as nding
their exact location. It also enables one to distinguish between return signals from real
semiconductors and other kinds of responses, such as those given by corrosion or metal-oxide-
metal structures.
1.2. Delivery package
ST 401 comes in a shockproof case NANUK-915, The delivery package includes the
following.
Item Quantity No. in Fig.1
ST 401 ‘Cayman’ NLJD 1 1
Accumulator Battery (type 18650) 4 2
Electric Charger 1 3
Charger Power Adapter 1 4
Headphones 1 5
Semiconductor Imitating Dummy (marked red) 1 6
MOM-Structure Imitating Dummy (marked blue) 1 7
Case 1 8
Operating Manual 1not shown
in gure
Fig. 1
3
Range of radiated frequencies 2–3GHz
Max. peak radiated power < 2W
Antenna polarisation elliptic
Operation modes SEARCH
AUDIO
ADAPT
Sensitivity range in manual mode 40dB (5 values with 8dB increment)
Response indication
– visual three 16-segment gauges
– aural internal speaker or headphones
Power supply two 3.7V Li-ion batteries (type 18650)
Time of operation on one battery charge 3–4 hours, depending on operation mode
Battery charging time < 3 hrs
Operating conditions
– working temperature range +5...+40°С
– relative air humidity up to 85 percent (at 25°С)
Weight (with batteries) 0,85kg
Dimensions (length×width×height) 340х130х160mm
Weight of full set in case 3,7kg
1.3. Main Technical Specications
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1.4. Principles of Operation
ST 401 ‘Cayman’ is a nonlinear junction detector, or NLJD. Instruments of this type employ
active detection, i.e. they emit probing signals and analyse the return. Their primary search targets
are electronic devices, and those typically consist of circuit plates with conductive elements and
various semiconductor parts connected to them, such as diodes, transistors, and microchips.
The probing electromagnetic radiation induces variable electromotive forces in these loops, and
electronic components with a non-linear current-voltage curve transform the initial signal into its
higher frequency harmonics, which come back to the NLJD’s receiver.
Higher harmonics can also be re-radiated by corroded metal or the so-called MOM-diodes,
metal-oxide-metal structures brought about by contacting metal surfaces. However, these
formations return somewhat different spectra than semiconductors.
With ST 401 one can distinguish with high probability between responses given by real
semiconductors, and those ‘faked’ by MOM-structures or corrosion. Another important advantage
is a condent detection of search targets behind partially shielding obstacles, which is achieved
by simultaneously radiating several frequencies within the 2-3GHz band and analysing the
composite picture of the reection spectrum.
1.5. Operation Modes
The NLJD ST 401 ‘Cayman’ has the following modes of operation:
Primary operation mode: SEARCH
Secondary operation mode: AUDIO
Service mode: ADAPT
The main operation mode named SEARCH is meant for detecting nonlinear targets and
identifying them, based on the response levels as indicated by 16-segment bars.
The auxiliary operation mode named AUDIO allows demodulating the response and listening
to it through the built-in speaker or headphones. Use this mode upon detecting a response in the
SEARCH mode.
The service mode named ADAPT is used to optimise the parameters in a given electromagnetic
environment and thus maximise the effectiveness of search. Engaging this mode is necessary
every time the device is switched on. It is advisable to pause during searches from time to time,
to repeat this procedure. During adaptation, the antenna must be pointed away from electronics
and large metal objects.
5
1.6.1. Antenna module
The antenna module comprises a receiver-transmitter unit, a control-display unit, and an
aerial, all of which are assembled on a single platform and incorporated in a single body.
The antenna module is connected with the handle through a hinge joint that allows adjusting
the incline within the vertical plane, as shown in Fig. 3. Loosen the hinge screw (2, Fig. 6) to
change the incline, then tighten the screw again.
Fig. 3
1.6. Structure
Structurally, the ST 401 ‘Cayman’ NLJD consists of the antenna module and the main unit
connected by way of a hinge joint. The general appearance of ST401 is shown in Fig. 2, the
numbers standing for:
1 – antenna module
2 – main unit
Fig. 2
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Fig. 4
On the surface of antenna facing operator, there are an indicator panel, a socket for the power-
and-control cable, and a USB port for computer connection (Fig. 4). The numbers in Fig. 4
stand for the following:
# in Fig. 4 description colour subscript on
indicator panel
116-segment led gauge of threat-type response
levels
red 1
216-segment led gauge of MOM-type
response levels
blue 2
316-segment led gauge of reection levels white 3
4Power-on led indicator red POWER
5SEARCH mode indicator yellow SEARCH
6AUDIO mode indicator yellow AUDIO
75-segment tuning bar* yellow TUNING
8socket for power-and-control cable CONTROL
9USB port USB
* the TUNING segment bar has two functions:
– in the SEARCH mode, it shows the selected sensitivity of the receiver (SEN)
– in the AUDIO mode, it shows the selected frequency combination (CH 1..5)
The boresight directions of the receiving and transmitting antennas are shown in Fig. 5.
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1.6.2. Main Unit
The main unit of ST 401 ‘Cayman’ consists of a battery compartment, a control panel, and
mechanical parts that form the bearing structure. The appearance of the main unit and the location
of its components are shown in Fig. 6.
Fig. 6
The numbers in Fig. 6 stand for:
1 – bracket mount for the antenna module
2 – lever handle of the clamp
3 – power-and-control cable with plug
4 – headphone socket
5 – power and volume knob
6 – battery compartment
Fig. 5
7 – control panel
8 – grid of the built-in speaker
9 – ID plate
10 – battery compartment cap
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A three-button control panel is located in
the upper part (Fig. 7).
The MODE button (1, Fig. 7) is used
to set the operation mode of the device. A
short press of this button alternates between
SEARCH and AUDIO; holding it down for a
few seconds will set the device to the ADAPT
mode.
The other two buttons marked with arrows
and (2 and 3, Fig. 7) are for tuning the
device. Depending on the mode, they allow:
– in the SEARCH mode, increasing
and decreasing the receiver sensitivity,
respectively.
– in the AUDIO mode, setting the desired
frequency combination. Fig. 7
The main unit has a battery compartment for 2 type 18650 accumulator batteries. Those are
enclosed with a screw cap (10, Fig. 6) that also serves as the negative contact.
Fore of the handle are the headphone socket (4, Fig. 6) and the power and volume knob
(5, Fig. 6). In the lower part there are a speaker grid (8, Fig. 6) and an ID plate (9, Fig. 6) that
indicates:
– product name
– serial number
– logo, and name of the manufacturer company.
2. USE
2.1. Preparation
Take the device and 2 batteries out of the case. Examine the antenna module, handle, cable
and socket for mechanical damage. Examine the batteries for mechanical damage and electrode
corrosion. Do not use the device if any such defects are found! To replace the batteries, do the
following:
Fig. 8
• unscrew the battery compartment cap;
• insert two accumulator batteries as
shown in Fig. 8, making sure you
observe the polarity;
• screw the cap back in place.
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Make sure the power switch (5, Fig. 6) is in its leftmost position (OFF). Insert the power-and-
control cord plug (3, Fig. 6) into the socket (8, Fig. 4) on the antenna module. Activate the device
by rotating the knob clockwise. The device status will be displayed on the antenna module as
shown in Table 1 below.
Table 1
legend colour light indication interpretation
POWER red continuous The antenna module is powered
properly.
blinking The battery is discharged and needs
to be replaced.
TUNING
SEN
yellow continuous This displays receiver gain. At
startup the gain is automatically set
to maximum, which is signalled by
all the 5 indicator segments being lit.
SEARCH yellow continuous This displays the operating mode.
The SEARCH mode is selected
automatically at startup.
Upon activation of the device one or more segments of the signal level gauges (1..3, Fig. 4)
may light and go out spontaneously. This would mean that the device should need to be adjusted
to the electromagnetic environment using the adaptive mode.
2.2. Adaptation mode
To activate this mode, press and hold for 3-4 sec the MODE button (1, Fig. 7) on the control
panel. The antenna must be directed away from large metal objects and anything that is presumed
to contain nonlinear elements (it is often best to point the antenna at either the oor or ceiling).
The adaptation takes 10–15 seconds, with all the indicators but TUNING lit in the meantime
on the antenna module. The TUNING indicator will be showing a consecutive lighting of
segments. The user can check if any of the indicator LEDs are dead.
Upon adaptation the device status will be displayed in accordance with Table 1.
Upon activation of the device one or more segments of the signal level gauges (1..3, Fig. 4)
may light and go out spontaneously. This would mean that the device should need to be adjusted
to the electromagnetic environment using the adaptive mode.
2.3. Operational check with test dummies
For that purpose select an area free of responses from nonlinear elements or reecting
surfaces, and place the dummy that is marked red.
Press button (3, Fig. 7) repeatedly to set the receiver gain at 3 lit segments of the
TUNING indicator, which corresponds to medium sensitivity.
Point the antenna at the test dummy and nd the distance at which all the 16 segments of the
INPUT LEVEL Gauge bar 1 light up. For a device that is in proper working order and has self-
tuned properly, this distance should be no less than 0.8 m.
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