i4Technology BugHunter Professional BH-03 Expert User manual

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CONTENTS
1 Specification and operation ................................................................................................................5
1.1 Application area...........................................................................................................................5
1.2 Technical features........................................................................................................................6
1.3 Device components.......................................................................................................................7
1.4 Internal design and operating.......................................................................................................7
2 Correct use.........................................................................................................................................10
2.1 Operating restrictions..................................................................................................................10
2.2 Before operating..........................................................................................................................10
2.3 Intended usage ............................................................................................................................10
3 Maintenance.......................................................................................................................................22
4 Troubleshooting.................................................................................................................................22
5 Package and transportation...............................................................................................................23
6 Acceptance certificate........................................................................................................................24
7 Manufacturer’s warranty ...................................................................................................................24
8 Warranty Card ...................................................................................................................................25

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Main advantages of BugHunter BH-03 over similar devices
1. The declared and real characteristics of the device are in strict conformity.
2. It covers the entire range of wireless “bugs” working frequencies (from 10 to 3500 MHz).
3. High sensitivity (throughout all the frequencies of the claimed frequency range).
4. Extended dynamic range.
5. It detects both analog and digital wireless bugs (that work on the principle of fast pulses).
6. Automatic adjustment to background radiation levels.
7. OLED-display to provide the visual image of the received signal type and the history of
changes within the last 45 seconds.
8. Switchable filters that exclude frequency ranges of base cellular communication stations
(GSM900/1800, 3G, 4G, CDMA450), and Wi-Fi (provides successful “bug” hunting in modern city
environment, highly contaminated by radio interference). Unique!
9. Vibroindication (switchable) and the possibility to connect the earphones to get the implicit
warnings of wireless "bugs".
10. Operating in different modes (sound indication, sound feedback, mute).
11. The possibility to use rechargeable batteries or built-in charger.
12. Search and security operating modes.
13. An additional extendable antenna (to increase the sensitivity).
14. Low battery indicator.
15. Self-diagnosis.
16. The possibility to detect the killers of cellular and other frequencies.
17. Design and manufacturing are made in Russia. Only high-quality components are used during
production.

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Attention!
Read carefully and follow the rules, restrictions and instructions contained in this manual to
increase the lifespan of the equipment and to use it more effectively.
The manufacturer's warranty will become invalid prematurely if the user of the equipment does
not follow the storage and transportation instructions.
Attention!
After storing the product in a cold place or transporting in winter the device should be kept at
room temperature for two hours before operating.
Attention!
Please request to perform functional testing before purchase. Also make sure that the warranty
sticker placed into the battery compartment is not damaged. Check the delivery set against article 1.3.1
of this manual. Ensure the warranty card is signed, dated and stamped.

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1 Specification and operation
1.1 Application area
1.1.1 This device allows users to monitor the signal strength ranging from 10 to 3500 MHz
and can also be used to detect transmitting devices, such as “bugs”, wireless microphones, wireless spy
cams, portable radio sets, working cellphones, cellular signal killers and suppressors, etc., within the
area nearby.
1.1.2 Device software provides:
-specially designed algorithm of measuring the digital and analog signal strength and displaying
its average and peak values on the time curve;
- sensitivity adjustment (selection of the sensing element’s output characteristics for providing
the most convenient detection of local signal peak);
-possibility to work in “security” mode (which includes the adaptation to the ambient
background, switching to the standby mode and further exit from the standby mode after when signal
sources have been detected, accompanied with sound, visual and vibro indicating);
- displaying of the time based diagram of radio environment;
-minimized impact of the isolated signal sources (such as base cellular communication stations,
Wi-Fi access points) on the process of radio transmitting equipment detecting;
-sound indication of the receiving signal’s level;
-vibroindication of exceeding the preset threshold by the average signal (with the vibration
intensity control);
-current time indication;
- battery charge level indication.
1.1.3 Device is intended to use at the temperature ranging from -10 to +40°С, the relative
moisture below 98% at the temperature of +25°С and at the atmospheric pressure of 84-106,7 kPa.

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1.2 Technical features
1.2.1 The Picture 1 below illustrates the physical configuration of the product.
Pic. 1. Physical configuration
1.2.2 The table below gives the information about technical features of the product.
Description
Value
Dimensions, mm, not more than
105х58х18,5
Weight with batteries, kg, max
0,11
DC supply voltage (two AAA batteries), V
from 2,2 to 3,2
Power consumption, W, max
0,6
Working frequency range, MHz
from 10 to 3500
Responsivity with filers switched off, mV / m, min
50
Dynamic range, dB, min
70
Detection range of a radio transmitter with the power of
5 mW, under a quiet radio background, m, min
5
Detection range of an operating cell phone, under a
quiet radio background, m, min
50

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Frequency ranges of built-in filters, MHz
-Wi-Fi
-4G
-3G
-GSM
-CDMA
more than 2400
from 832 to 862 and from 2620 to 2690
from 2110 to 2170
from 925 to 960 and from 1805 to 1880
from 463 to 467,5
Strength loss of output by built-in filters within the preset
frequency range, dB, min
15
Continuous work duration (with sound and vibro
indication switched off), min:
- from 2 alkaline batteries of AАА type GP Ultra
- from 2 accumulators of ААА type (2400 mA/h)
400
500
1.3 Device components
1.3.1 The table below gives the information of components of the product and the delivery set.
№
Description
Quantity
Note
1
BugHunter Professional BH-03
1
2
Accumulator of ААА type
2
installed
3
Charging unit
1
4
Power cord
1
5
Earphones
6
Shipping box
1
7
User manual INTK.411153.006 RE
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1.4 Internal design and operating
1.4.1 Bug Hunter BH-03 is a portable device that has an autonomous power supply. The case
made of impact-resistant ABS plastic (item 1) has a battery compartment (item 2) with a battery cover
(item 3).There also membrane keyboard with 9 push-buttons (item 4), OLED-display (item 5) and

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micro-USB connector (item 6) for the charging unit are placed in the case. Picture 2 illustrates the main
parts scheme.
Pic. 2. Scheme of main components
1.4.2 Picture 3 illustrates the display in the “search mode”
During the measurement process, the average (item 1) and peak (item 2) values of the received
signal strength are being constantly displayed on the screen. The displaying is performed in logarithmic
notation, on a selected sensitivity range scale, and as a graph of values for the last 3 seconds. The graph
of the average values history for the last 45 seconds (item 3), selected sensitivity level (item 4),
vibroindication engagement threshold (item 6) on a scale of a current level of a received signal’s
strength (item 5) are also displayed on the screen.

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At the same time the device displays on the screen the filter state (switched on/off, item 7),
vibroindication state (switched on/off, item 8), adjusted sound mode (mute, sound indication or
feedback, item 9), current operating mode (“search” or “security”, item 10), and the selected type of
power supply (item 11).
Pic. 3. Screen in the “search” mode
1.4.3 The control buttons are used to:
-turn the device on/off (by holding), and exit from a menu (by short pressing);
-switch to the main settings menu and back (by short pressing);
-navigate through the menu and select values;
-switch between operating modes (by short pressing) and sound modes (by holding);
- gain a quick access to the filter selection menu.
You can learn more about the functions of control buttons below.
1.4.5 The device is powered by two AAA type batteries or two accumulators of the same type.
How to install the batteries into the case you can see on the battery compartment’s bottom or in the
Picture 4.
Pic. 4. Batteries installation scheme

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2 Correct use
2.1 Operating restrictions
2.1.1 Keep the battery compartment and battery contacts clean.
2.1.2 Change discharged batteries and recharge accumulators on time.
2.1.3 Before recharging accumulators installed into the product’s case, ensure that there are
rechargeable batteries not the galvanic batteries installed. It’s prohibited to charge the galvanic
batteries, you must renew them.
2.2 Before operating
To prepare the device for working you should:
- loosen the screw and remove the battery compartment’s cover (Pic. 2, item 3);
- install the batteries respecting polarities (Pic.4);
- place the battery compartment’s cover back and fasten it with screw.
2.3 Intended usage
2.3.1 Turning the device on/off. To turn the device on, press and hold button for 2 seconds.
When the device turns on, you’ll hear a beep and see the screen saver (Pic. 5).
Pic. 5. Screen saver
The device will switch to the “search” mode and the screen will look like in the Pic. 6.
Press and hold button for 2 seconds again to turn the device off.

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Pic. 6. Screen in the “search” mode
2.3.2 User settings
2.3.2.1 Filters adjustment
This option allows user to reduce the interference of Wi-Fi access points and cellular stations
signals, making the search of radio transmitting devices easier.
- Press button to display the main menu screen (Pic. 7);
Pic. 7. Main settings menu
- select «FILTERS» bar by pressing «▲» and «▼» and confirm your choice by pressing or
«►» button;
- in the opened submenu (Pic. 8) select the filter you need and activate/ deactivate it by pressing
(filter marker will change);

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- return to the main menu by pressing «◄» button to continue adjustment or to quit right to the
“search” mode by short pressing button or button.
Pic. 8. Filters adjustment
Notification:
1. There is button to gain quick access to this option (avoiding main menu).
2. In the “search” mode the filters that have been activated this way glow blue (item7 Pic.8),
inactive filers remain grey on the screen.
2.3.2.2 Sound adjustment
This option gives an opportunity of selecting one of three available sound modes:
1) mute (internal speaker produces no sound while searching and setting up the device; while
pressing buttons the confirmation sound is not produced also);
2) sound indication (internal speaker produces short sounds in the “search” mode; the sounds are
becoming more frequent as the transmitting devices’ signal are becoming stronger, i.e. the graphic
indication on the display is complemented by sound);
3) sound feedback (internal speaker produces demodulated sound of transmitting devices);
-in main menu (Pic. 7) select “SOUND” bar by pressing «▲» and «▼» and confirm your choice
by pressing button or «►», the sound adjustment menu will appear on the screen (Pic. 9).

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Pic. 9. Sound adjustment
- you can choose one of three available sound modes by pressing «▲» and «▼»;
- confirm the selection of another sound mode if it’s needed by pressing button, after
doing this the selected bar will glow;
- return to the main menu by pressing «◄» button to continue adjustment or to quit right to the
“search” mode by short pressing button or button.
Notification:
1. There is a prior mode demonstration while selecting a sound mode by pressing «▲» or «▼»
buttons.
2. An icon of selected sound mode is displayed in the top bar of the screen:
- mute;
- sound indication;
- sound feedback.
3. You may select a sound mode quickly (avoiding main menu) by pressing and holding
button.
2.3.2.3 Power supply selection:
- in the main menu (Pic. 7) select “BATTERY MODE” bar by pressing «▲» button or «▼»
button and confirm your selection by pressing button or «►» button, power supply selection
menu will appear on the screen (Pic. 10);
- select the type of power supply that is used by pressing «▲» button or «▼»;
- confirm the selection of another sound mode if it’s needed by pressing button, after
doing this the selected bar will glow;

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- return to the main menu by pressing «◄» button to continue adjustment or to quit right to the
“search” mode by short pressing button or button.
Pic. 10. Power supply selection
Notification:
The selected type of power supply is displayed in the top bar of the screen:
- rechargeable type of power supply (accumulator) is selected, the charging is possible (the
plug lights green);
- single-use type of power supply (galvanic battery) is selected, the charging is impossible.
2.3.2.4 Auto shutdown: this setting turns off the screen after a timeout selected by the user to
save power; the device continues operating in “search” mode. At that you can monitor the readings
by pressing any button.
- In the main menu (Pic. 7) select “SCREEN ADJUSTMENT” bar by pressing «▲» button or
«▼» button and confirm your selection by pressing button or «►» button, a menu of available
timeout periods will appear on the screen (Pic.11)
Pic. 11. Auto shutdown adjustment

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- you can select one of three available timeout values by pressing «▲» button or«▼» button;
- confirm the selection of another timeout value by pressing button, after doing this the
selected bar will glow;
- return to the main menu by pressing «◄» button to continue adjustment or to quit right to the
“search” mode by short pressing button or button.
2.3.2.5 Vibration level adjustment: this setting turns vibroindication on/off and defines the level
of vibration intensity.
- In the main menu (Pic. 7) select “VIBRATION” bar by pressing «▲» button or «▼» button
and confirm your selection by pressing button or «►» button, vibration menu will appear on the
screen (Pic.12);
Pic. 12. Vibration level adjustment
- you can select one of three available levels of vibration intensity by pressing «▲» button
or«▼» button;
- confirm the selection of another intensity level if it’s needed by pressing button, after
doing this the selected bar will glow;
- return to the main menu by pressing «◄» button to continue adjustment or to quit right to the
“search” mode by short pressing button or button.
Notification:
1. There is a prior mode demonstration while selecting a level of vibration intensity by pressing
«▲» button or «▼» button.
2. An icon of selected vibration mode is displayed in the top bar of the screen:

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- vibroindication is on;
- vibroindication is off.
2.3.3.2.6 Quick guide
- Press and hold button for 2 seconds to call the help menu. Text information shown in the
Picture 13 will be displayed on the screen;
Pic. 13. Quick navigation guide
- you can navigate from one help screen to another by pressing «▲» and «▼» buttons;
- you can return to the “search” mode by short pressing button or button.
2.3.3 Operating modes: “search” and “security”
2.3.3.1 Switching between modes
The device always starts in the “search” mode. An icon of the adjusted mode is displayed in
the top bar of the screen:
- “search” mode;
- “security” mode.
You can switch between operating modes by short pressing button. While switching to
another mode you’ll see the notification on the screen. While switching to the “security” mode the
notification (Pic.14) will appear for 2 seconds:
Main screen
To move from one
Sensitivity scale to
another press and
hold right arrow >>
To move back press
and hold << left arrow
To perform
automatic
adjustment for
background radiation
level press and hold
the middle button
“OK”
Filter button,
Mode change button,
Settings and cancel
buttons can also change
their function when
they are pressed and
held

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Pic. 14. Switching to the “security” mode notification
Next you’ll see the animation displayed within the graphs drawing zone. After animation the
screen will turn off.
Pic. 15. Switching to “security” mode animation
When the device is in the “security” mode, the notification appears on the screen periodically
(Pic.16):
Pic. 16. Notification in the “security” mode
While changing modes by pressing button, the notification (Pic. 17) will appear on the
screen for 2 seconds. After it the device will go to the “search” mode.

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Pic. 17. Notification of switching to the “search” mode
2.3.3.2 “Search” mode
2.3.3.2.1 Graphical presentation of information
“Search” mode is the main operating mode used to search for radio transmitting devices indoors.
Main elements of “search” mode graphic interface are shown in the picture 18.
Pic. 18. Main elements of the “search” mode graphic interface
Current level of radio signal strength is displayed in real time as a graph of peak values (item 1,
blue color on the background) and average values (item 2, green color on the foreground). Graphs show
the changing of radio environment for the last 3 seconds. The current value is in the right part of the
graph, and the values are moving to the left becoming obsolete.
Notification: Peak value graph (Item 1, Pic. 18) illustrates the signal type (pulse-shaped or
solid) and it is an analog of “impulse” mode of modern searching devices (digital “bug” search mode).
Average value graph (item 2, Pic.18) illustrates the average signal strength and it is actually the
realization of the “analog” mode (analog “bug” search mode). You can perform searching of the local
signal strength maximum using any of these two graphs considering that “impulse” mode, i.e. peak
value graph, is still better for searching for digital “bugs”. Average value history graph (item 3,

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Pic.18) is for storing and displaying radio environment condition for longer period of time (45
seconds). For your convenience the history graph is divided into three 15 seconds blocks.
2.3.3.2.2 Sensitivity and vibroindication engagement threshold adjustment
Within the searching process you will need to adjust the device sensitivity (scale item 4, Pic. 18)
and (if needed) the vibroindication engagement threshold (scale item 6, Pic. 18). To select the scale
use «◄»and«►» buttons (to confirm selection press and hold the button for 2 seconds, with that the
selected scale marker (item 5) will glow), and the adjustment is done by pressing «▲» button and«▼»
button.
Sensitivity adjustment scale is active by default. You need to adjust the device sensitivity in the
way that selected graph will not “go into overdrive”. The «▲» button increases sensitivity (to display
signals that have weaker amplitude). The «▼» button decreases sensitivity (to display stronger
signals). When changing the sensitivity level, the graph scaling is performed automatically (items 1, 2
and 3, Pic. 18).
Device supports automatic sensitivity adjustment. To perform it in search mode, press and hold
button for 2 seconds. Automatic adjustment is performed according to the average signal strength
level (graph item 2, Pic.18).
Vibroindication engagement threshold adjustment is performed in accordance with the average
signal strength level, displayed in real time on scale (item 6, Fig. 18), in device full dynamic range,
without a reference to selected sensitivity level. This scale can be used for the overall assessment of
the radio environment at current moment.
2.3.3.2.6 Practical recommendations on using the “search” mode:
- Before starting the search, switch off all radio-emitting devices if possible (Wi-Fi,
smartphones, tablets, computers and other household and office equipment). It simplifies the search by
eliminating the excess noise, and makes it possible to use higher sensitivity while searching.
- Extend the device antenna to its maximum size. Turn the device on. The device automatically
adjusts the sensitivity level when you turn the device on.
- Begin to walk around your room, holding the device at the distance of 0,3 –0,5 meters from
the researched surface. If a maximum signal strength level is displayed on the screen (green graph of
average values shows maximum), press and hold for 2 seconds button. The device will
automatically adjust the sensitivity level. Repeat these actions until the site, where the evident
maximum level of emission is, is located.
- Another search method: after the automatic sensitivity adjustment, you can decrease it by two
levels. Then search the supposed “bugs” locations from a distance of at most 0,2 meters. If signal

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maximum appears, reduce sensitivity further and search the location of closer distance of 5.. 10 cm to
find the location of the signal source more accurately. Picture 19 illustrates the typical view of the
screen while approaching to the radio transmission source if this method is used.
Pic. 19. Signal strength level increasing when approaching to the analog transmitter
-If there is a strong enough and permanent signal level all over the room, it can mean that there
is an powerful external source of radio transmission (cell phone tower, strong Wi-Fi access points). In
this case, try to switch on all device filters and continue searching. If the signal amplitude on the graph
reduces significantly after switching the filters on, you can figure out exactly what signals jam the
search by switching the filters on/off one after another. Next you can reduce the interference by
switching on the needed filters and switching off the unnecessary ones.
- The locations where eavesdropping devices and hidden cameras are usually placed, are: cavities
and chinks in plinths and walls, behind radiators, remote places on wardrobes and curtain-rods, cavities
of suspended ceiling, ventilating shafts, furniture elements, household equipment, flowers, car
dashboards and seats, etc.
- Use the sound indication mode when searching in remote places, where it is difficult to keep
looking at the screen. The increasing frequency of sound signals will show that you are approaching to
the source of radio transmission.
- Carefully inspect for the presence of wireless “bugs” the site where the maximum emission
strength was found, the sensitivity level can be adjusted manually at that by pressing «▲» (increasing)
button and «▼» ( decreasing) button.
- If there are spikes and valleys on the green graph of average values and obvious spaces on the
background blue graph of peak values as shown in Picture 20 (a) when searching in the same area
(device is not moved), then there is a high probability of an operating digital transmitter. The digital
character of the detected signal is also defined by obvious transmission/pause intervals on the peak
values graph and higher amplitude of peak values, compared to the average ones (as shown on Pic. 20
b, c).