TS-market LORNET-24 User manual

CERTIFICATE
© TS-Market
USER MANUAL
«LORNET-24»
ULTRA-COMPACT
HANDHELD
NON-LINEAR JUNCTION
DETECTOR

2
Contents
USER MANUAL........................................3
1. Introduction..................................................3
2. Specications:.............................................5
3. Delivery set, design and accessories........7
4. Appearance ..................................................8
6. Safety Measures ........................................18
7. Operation Order.........................................18
8. Search Recommendation .........................22
CERTIFICATE.........................................24
1. General .......................................................24
2. Delivery set ................................................25
3. Warranty .....................................................26
4. Importer:.....................................................26
5. Claims Data................................................26

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USER MANUAL
1. Introduction
The non-linear junction detector “LORNET-24”
(further NLJD) is used for search and location of
electronic devices both in active and switch-off
state.
The detector operation is based on the property
of semiconductor components to generate a
response at the 2d and 3d harmonics when
radiated by an RF probing signal. Semiconductor
components of articial origin will have a higher
level second harmonic while semiconductor
components of natural origin (e.g. oxide lms) will
have a higher level third harmonic respectively. An
NLJD analyzes the 2d and 3d harmonics response
of the radiated objects, which enables a quick and
reliable identication of electronic devices and
natural oxide semiconductors.
The NLJD “LORNET-24” automatically nds the
best receiving frequency channel free of noise
and distortion providing awless operation even
in the complicated electromagnetic environment.

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The frequency tuning algorithm implemented in
“LORNET-24” automatically selects the RF probing
signal frequency such that the noise level
in 2d harmonic receiving channel is held minimal,
while digital processing of a demodulated signal
gives maximum sensitivity.
There are two types of radiated signals:
• continuous wave carrier (CW);
• pulse modulated carrier with a duty cycle 4%
(pulse).
This enables to combine wide detection range and
reliable identication of the de-vices found.
The output power automatic control mode
signicantly simplies operator’s work.
“LORNET-24” simultaneously displays the 2d
and 3d harmonics levels at its LED panel. Besides,
the 2d and 3d harmonics levels can be estimated
in turn aurally by the click repetition rate
reproduced through a built-in loudspeaker or
wireless ear-phones.
Detector of the returned RF signal envelope
enables tapping radio microphones and using
the acoustic feedback mode which facilitates
search work.

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2. Specications:
2.1. Radiated signal types:
• continuous wave carrier;
• pulse modulated carrier with a duty cycle 4%.
2.2. Carrier frequency step 0.2MHz within a tuning
range of (2409.6 … 2410.4)MHz.
Automatic frequency selection. Possibility of
radiation at the carrier frequency with a minimum
noise level in the 2d harmonic receiver path.
2.3. Maximum radiated power in the
CW mode ≤0.5W.
2.4. Peak radiated power in the pulse
mode ≤10W.
2.5. Manual or automatic control of the radiated
power level.
Dynamic control range of 30dB down from the
maximum output power value with 11 level
gradations.

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2.6. Receivers sensitivity better than –140dBW
given a 10dB signal to noise ratio.
2.7. Receivers tuning frequencies equal to the
transmitter double and triple frequencies.
2.8. Receiving path dynamic range ≥ 70dB.
2.9. Time of continuous operation with a lithium-Ion
battery at the maximum radiated power:
• ≥3 hours in the pulse mode;
• ≥1,5 hours in the CW mode;
• unlimited operation time from 220V mains
with a power adapter connected.
2.10. Equipped device weight ≤0.7kg.
2.11. Operating conditions:
• ambient temperature 5…40ºC;
• pressure ≥ 450mm of mercury.

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3. Delivery set, design and accessories
3.1. The device includes units and accessories
stated in the Table below:
Description Q-ty
Receiver-transmitter unit with control
unit and built-in battery container 1
Changeable Li-Ion batteries 2
Container for battery charging 1
Charger for receiver-transmitter unit
(CH1) 1
Wireless accessories including:
receiving device, earphones and
charger (CH2)
1
Technical Description & User
manual, Certicate (in one piece) 1
Package 1

4. Appearance
The appearance of the device is shown in
Fig. 1, where:
1- LED
indicator;
2- ransceiver
antenna unit;
3- control panel
with a power
section and
battery (xed
derneath).
Wireless earphones, chargers and additional
batteries are not shown.
Fig. 1
1
2
3

5. Purpose of the Detector Basic Units
5.1. The transceiver antenna unit with built-in LED
indicators (shown in Fig. 2) is used for:
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3
Fig. 2
• Analysis of distortion and interference in
the instrument receiving path, which is
made each time the detector transmitter is
switched on. Therefore, if an interfering signal
appears during operation (in a complicated
electromagnetic environment) it is necessary
to turn the detector transmitter off and on
from time to time thus selecting an optimal
frequency automatically, which will provide
the best sensitivity as well as detection range
of semiconductor components.
• Generation of CW or pulsed RF signal.

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• Reception and digital processing of the 2nd
and the 3rd frequency harmonics. Simul-
taneous display of the 2nd and the 3rd
harmonics levels gives the opportunity to
dis-tinguish with a high reliability between
signals of articial semiconductors integrated
in electronic devices and natural corrosive
ones which may appear at oxidized junc-tion
points of various metals.
• Demodulation of the 2nd and 3rd harmonics
response, their amplication to the level
required for tapping both by earphones and
a built-in loudspeaker. The amplication is
adjustable within a 20 dB range. The operator
can listen to demodulated signals of the 2nd
and 3rd harmonics in turn.
• Indication of the probing signal levels (1) as
well as of the 2nd (2) and 3rd (3) harmonics
levels (Fig. 2).
5.2 Hinge joint of the transceiver antenna unit
with a knob is designed to transform the unit into
transportation position. (see Fig.3). Besides, it
helps the operator to x the antenna in a position
convenient for search.