NR-900EMS - NLJD. Owner`s manual.
Contents
1. fig 57 Fig 54 57 NR 900EMS packing order I NR 900EMS User s Manual 371 Lay the rod with antenna system and control unit above the Main unit arranging LCD screen downwards Use figured partitions of the bag for your better convenience fig 58 Place the headphones above telescopic rod putting them on its handle in the right part of the bag fig 59 Close the bag cover Zip the bag fastener Clasp the bag s straps with an additional handle and fix them with Velcro fastener fig 60 Fig 58 60 NR 900EMS packing order II 38 NR 900EMS User s Manual 14 Battery charging Operating the Mach 1 FUSION LENMAR charger use its Manual supplied as a reference yod NOHT Ar L z 2 a O m z D Fig 61 NR 900EMS standard charger complete set 14 1 Standard charger complete set fig 61 1 Charger body 2 Charging adapter for coupling to the device Main body 3 AC adapter LENMAR LAD1512DB2 4 12 V car cable NOTE AC adapter LENMAR LADI512DB2 allows to charge the battery from the mains 100 240 V 50 60 Hz NR 900EMS User s Manual 39 Latches LED indicators Charger s back side Socket for coupling AC adapter or car cable Fig 63 Charger body back side 14 2 Battery charging order 14 2 1 Couple charging adapter cable to 5 socket on the Main body front panel fig 64 14 2 2 Couple charging adapter to the2. By the way contact spot of two metallic surfaces divided by oxide layer produces a similar non linear phenomenon like natural semi conductors so called corrosion diodes But when irradiated by a probing signal of a certain frequency F it produces and re radiates in general it s 3 rd harmonic unlike industrial semi conductors with their 2 nd harmonic reply This difference is widely used for target recognition in NLJD technique Special 20K mode is used for painstaking received signal investigation This mode allows operator to distinguish with sufficient confidence between industrial semi conductors and the so called corrosion diodes natural semi conductors produced by two metallic surfaces divided by thin oxide layer The following operating modes are available for NR 900EMS User 300 20K Listen and Sleep 300 mode represents the main operational mode In that case the received signal parameters are analyzed and displayed on a LCD screen fig 6 Fig 6 NR 900EMS LCD in a 300 mode At that continuous audio signal can be heard in the headphones Its loudness corresponds to the received radio signal level 2 nd or 3 rd harmonic depending on operator choice Probing signal level adjustment as well as receiver input attenuation are also available NR 900EMS User s Manual 9 20K mode provides an operator with a perfect opportunity to distinguish corrosion di
3. NR 900EMS is power supplied from built in Li Ion rechargeable battery NOTE Flat battery status lower then 5 7 V is indicated by a typical melody in the headphones while BATTERY EMPTY warning appears in that display line In that case switch off the device immediately and charge the battery by means of Standard charger supplied Otherwise the device will be switched off automatically after repeated above mentioned melody warning NR 900EMS 5 NR 900EMS Marking Main unit transceiver Fig 33 Works number on the back side of the Main unit body User s Manual 25 Works number A W TQ AVOID RCU L OPENII 7 4V UT 9000000 REPLACING BATTERY OR OPENING CASE E TAN 74V c D NR 900EMS UTTA 74 4500 BP Fig 34 NR 900EMS front panel marking Manufacturer Logo 1 and NR 900EMS sign 2 Fig 35 Full LOGO on the Main unit sidewalls 26 NR 9D0EMS User s Manual Packing bag Fig 36 The NR 900EMS reference sign and its works number are on a label in a pocket of the packing bag Label 6 Sealing Main unit transceiver Works sealing bottom right hollow for a fastening screw on the front side of the Main body fig 37 NR 900EMS Fig 37 Works sealing of Main unit body 7 Packing Complete set of NR 900EMS equipment is packed into a dedicated shockproof bag fig 38 The bag is made of a durable synthetic fabric has rigid frame and soft inserts
4. Not more 1 5 Kr Not more 7 5 Kr NR 900EMS device represents a portable device that consists of antenna system probing signal transmitter and 2 channel receiver These channels are tuned to 2 nd amp 3 rd harmonics of the probing signal frequency F fig 3 Fig 3 NR 900EMS Main operational units Fo 2F 3F NR 900EMS User s Manual 7 NR 900EMS Antenna system consist of two coaxial directional antennas placed on the tip of the telescopic rod fig 4 Main lobes of antennas radiation pattern are oriented along their geometrical axis Fig 4 Antenna system principal of operation All operational modes are adjusted by NR 900EMS Control unit placed on a telescopic rod fig 5 aff fi Fe Ade if A MIDE h 736 4 iw f Fig 5 NR 900EMS Control unit Main view Mono harmonic probing signal F emitted by transmitter is converted by non linear elements semi conductors of a certain electronic unit to poly harmonic one and re radiated better say scattered into an ambient space see also fig 4 8 NR 900EMS User s Manual Two channel receiver detects the 2 nd amp the 3 rd harmonics of the probing signal from that received re radiated signal 2F amp 3F received signal levels are displayed on the LCD screen Furthermore at the same time tonal acoustic signal is reproduced by the headphones The tonal signal level corresponds to that of the received electric signals
5. charger itself fig 65 Fig 64 Charger connection to the Main body zamon FO R NR 900 EMS 40 NR 9D0EMS User s Manual To do that 1 Put the adapter body on top of the charger and press it down 2 Slide adapter body toward LED indicators on the front plate of the charger 3 The charger is ready for operation 14 2 3 Connect the charger to the mains or to 12 V car socket by means of corresponding AC adapter fig 66 or cable fig 67 T AV LI ION 7 4V LI ION FOR FOR NR 900 EMS NR 900 EMS Fusion SW3 006 YN yuos NOM APL To mains To main unit Fig 66 Charger coupling to the mains NR 900EMS User s Manual 41 SW3 006 YN y0s NONII a ae To Main unit Fig 67 Charger coupling to 12 V car socket 14 2 4 After coupling the charger to main unit and to power supply net it starts actual battery status analysis and automatic charging process 7 4V LI ION FOR NR 900 EMS rs ee ee Machi SpeedCharger _ es ae MED HI MAX ee FUSIOM haa en a Fig 68 3 LED charger indicator 42 NR 9D0EMS User s Manual 14 2 5 Use 3 LED MED HI MAX on the charger front panel as well as table 5 as a reference to control battery charging fig 68 Table 5 Charger LED indications MED HI MAX Flat battery successive green blinking Charging start Blinking green Battery charge over 70 green green 14 2 6
6. ee a U MBA R R R E O R E 5 Operational mode switching eee he _ 12 dB este Search 20 K a NR 900EMS Headphones out switching over 2 nd or 3 rd harmonic output Attenuator adjustment buttons Button stands for attenuation increase higher attenuation value Button stands for attenuation decrease lower attenuation value Headphones audio level adjustment See the note on the page 18 Functional button Single stroke Sleep mode Second stroke in less then 20 c interval LCD contrast adjustment Triple stroke in less then 20 c interval Averaging out constant adjustment User s Manual 17 T p e ma a real clamsingge ATT 1808 7 See 12 dB 7 6 VU 12 de rab lJ h SESS ee eee 12 dE ne sas ZEU rF ATT 48dE FAAN Cu See 16 dB 18 NR 9D0EMS User s Manual NOTE to the Table4 VOLUME CONTROL Headphones volume control is available only in the main operational modes LISTEN 300 or 20K Volume control is not provided in optional operational modes LCD contrast amp Averaging out constant adjustment and etc Volume control is carried out by 4 H gt buttons Press any of A M buttons a new window with headphone icon pseudo analog scale and adjusted volume level in dB T SERRE will appear on LCD fig 22a LIe Ap 0 dB corresponds to maximum a
7. bag fig 41 9 2 Couple two HF connectors to corresponding jacks on the Main unit front panel using mnemonic symbols and or color y marks as a reference fig 42 Puc 42 Iloakiro4ueHne AaHTeCHHBIX KaOeslel 30 NR 900EMS User s Manual 9 3 Connect Control unit cord to socket on the front panel of the Main unit fig 43 Fig 43 Control unit connection 9 4 Connect headphones to socket on the front panel fig 44 Fig 44 Headphones connection 9 5 NR 900EMS is ready for operation Fig 45 NR 900EMS set is ready for searching NR 900EMS User s Manual 31 10 NR 900EMS operation order 10 1 Switch on the device by button single stroke Listen mode will be activated 10 2 Adjust the highest receiver sensitivity by means of button A 10 3 Turning around antenna system press 2 3 button coupling headphones to the 2 nd and 3 rd harmonic receiver output respectively 10 4 Make sure that there is no interference at operating frequencies with the receiver s maximum sensitivity Otherwise adjust the receiver attenuator to reduce the interference signal below the sensitivity threshold by means of buttons 11 NR 900EMS operation test 11 1 Press 5 button second time 11 2 Place standard imitator item 8 at the fig 2 in a space free from any electronic equipment 11 3 Switch on maximum probing signal output Pmax pressing PWR button 11 4 Point ou
8. forbidden 4 1 System design NR 900EMS device consists of the Main unit transceiver 1 antenna system 2 Control unit with LCD 3 telescopic rod 4 HF cables 5 and headphones 6 fig 11 Fig 11 NR 900EMS design NR 900EMS User s Manual 11 4 1 1 Antenna system Fig 12 Antenna tilt adjustment 4a Joint fix screw NR 900EMS antenna system is fasten to the tip of 3 elbow telescopic rod fig 11 Antenna system elevation can fixes in a wanted position by a joint with a holder screw item 4a at the fig 11 amp 12 Telescopic rod length can be adjusted by means of 2 level locks item 4b at the fig 13 Fig 13 Telescopic rod length adjustment RF cables 5 protected by flexible plastic hose are squeezed through the telescopic rod fig 14 Fig 14 RF cables pass through the telescopic rod 12 NR 90D0EMS User s Manual RF cables are permanently fixed to the antenna system whereas connected to the mail unit transceiver via RF plugs fig 15 amp 16 4 1 2 Transceiver Main unit Fig 16 HF cables coupling to the Main unit Transceiver unit is supplied with a shoulder strap for easy handling and transportation fig 17 Fig 17 Main unit transceiver with a shoulder strap NR 900EMS User s Manual 13 Main unit front panel with basic system connectors fig 18 Fig 18 Front panel with basic connectors 1 Headphones jack S i 2 Control unit j
9. 0K mode In 20K mode the following adjustments are available for the operator Headphones switching among the 2 nd amp 3 rd harmonic 3 2 button Input signal attenuation adjustment o buttons Headphones volume control lt q p gt buttons Repeated 300 20K button stroke restores the 300 mode NR 900EMS User s Manual 23 4 2 4 Sleep mode Sleep mode is activated by a single stroke of 3 button In this mode the device switches off automatically after 20 sec of the mode activation All working parameters settled by an operator are stored in a device nonvolatile memory fig 30 Sleep mode is intended for ie ee the rapid restoration of the i faa pmi far F DE device operational facility after its short break up in a searching operation Fig 30 Sleep mode indication After the device repeated switching on by cb button it returns into an active mode with all adjustments restored NOTE If NR 900EMS switching off was done by 5 button passing Sleep mode the Listen mode with every initial factory setting would be restored after device activation 4 2 5 Optional settings Successive gt button press within A M time lapse allows an operator to proceed to the following optional settings LCD Contract adjustment button stroke activates LCD contrast adjustment At that fF a ee LCD contrast analogue scale Ft appears on the screen together p with it
10. After battery charging completion unplug the charger from the mains and adapter from the device NOTEe The battery can be unplugged from the charger during any charging stage without any failure to the battery or the charger itself Attention The charger should be switched off from the mains before hand NR 900EMS User s Manual 43 15 Rechargeable battery replacement Attention Switch of the device and unplug the Control unit cord before replacing the rechargeable battery In case of spent or dead battery it should be replaced by a new one provided by the device manufacturer supplier Turn off two screws on the backside of the Main unit body Open the back side cover Draw the battery from the battery compartment Fig 69 71 Battery replacement I a T 15 1 Unplug old battery from a socket on the backside of the device 15 2 Take a new battery supplied by the device OEM NOTE Use only the batteries provided by the device OEM Any similar substitute will inevitably damage the NR 900EMS device 15 3 Plug new battery to the A M socket on the back side of the device 15 4 Place the battery into the battery compartment 15 5 Close battery compartment cover 15 6 Fasten battery compartment cover with corresponding screws T Fig 72 75 Battery replacement II NR 900EMS User s Manual 45 16 Shipping and storage NR 900EMS can be shipped in standard packing in a passen
11. Handy grips and a shoulder strap make its transportation easy and comfortable Fig 38 NR 900EMS standard packing bag NR 900EMS User s Manual 27 NR 900EMS Placement in a standard packing bag is shown on fig 39 40 2 3 4 Fig 39 NR 900EMS placement in a packing bag Standard packing bag Main unit transceiver Telescopic rod with Antenna system and Control unit Headphones Pocket for appliances Pocket for technical documentation Al Daal le a a Fig 40 NR 900EMS appliances in dedicated pocket a Charger with adapters and cables b Imitator 28 NR 900EMS User s Manual 8 Operation condition and restrictions After long term exposure to a low temperature keep the device packed in a standard carrying case at least 2 hours for evening up its temperature with the environment Operating NR 900EMS keep corresponding safety measures safety precautions for the open RF emitters Don t direct the NR 900EMS aerial to the human eyes from the distance less then one meter Avoid prolonged presence of personnel in a main lobe of NR 900EMS antenna diagram NOTE Probing signal power density at the distance of 1 meter at the maximum of the directional radiation pattern does not exceed Russian State Standard 12 1 006 84 Russian State Sanitary Norm for UHF equipment serviceman under of continuous 8 hours operation eS a 9 NR 900EMS preparation for use 9 1 Take NR 900EMS out of standard packing
12. NR 900EMS User s Manual CONTENTS 2 NR 900EMS complete set 4 NR 900EMS principle of operation 6 2 NR 900EMS preparation for use 29 2 NR 9D0EMS User s Manual This Manual ts intended for explanation NR 900EMS Non linear Junction Detector design amp principle of operation as well as directions for its use For proper equipment use study this Manual in depth NR 900EMS User s Manual 3 1 Function NR 900EMS Non linear Junction Detector is intended for searching of concealed eavesdropping devices and similar facilities that enclose semi conductor elements 7 Ree It might be 3 mnnnannnn 25 12 dB ATT 20d6 3 i t 736 M MAX PEO Radio mikes Quenage Constant 2s B MODE_2aK Microphone acze E ATT 10d0B amplifiers a er Mare el gt or Wired mikes 2 a8 ATT 90db ECs min Devices with IR or ultrasonic data amp a ee control channel Video amp audio recorders Fig 1 NR 900EMS non linear junction detector NR 900EMS can detect all above mentioned items in every operational mode active stand by or even switched off status NR 900EMS ensures comprehensive bugs searching and their reliable localization in fabric constructions furniture various office or home items NR 900EMS provides an operator with an opportunity to distinguish industrial electronic like eavesdropping devices in shot bugs from na
13. ack 1 a 3 4 NOTE 1 The same jack is used for charging built in rechargeable battery NOTE 2 Coupling the device s Control unit or standard Charger to that particular jack pay special attention to the key of the jack see an arrow at the fig 19 Fig 19 Key position in Headphone and Control unit Charger connectors 3 4 Connectors for coupling antenna system RF cables see also fig 16 Fig 19 1 Dashboard socket for coupling transmitter s antenna cable to the main unit Fig 19 2 Dashboard socket for coupling receiver s antenna cable to the main unit NOTE Optional color jack marking Fig 18 pos 3 amp 4 is available Fig 19 3 Transmitter s antenna cable plug Fig 19 4 Receiver s antenna cable plug 14 NR 9D0EMS User s Manual 4 1 3 Display amp Control unit NR 900EMS Control unit fig 20 in essence consists of LCD and a control board with 9 non fastening buttons Control buttons LCD Fig 20 NR 900EMS Control unit general view Liquid crystal display Any operational data essential for the operator during any operating mode are displayed on the device LCD as well as optional parameters during their adjustment procedure see fig 21 and table 4 EA a FE Ef I Average Consti r LE S 6 2a LISTEN MODE TOBEE Nnnn nnn n i BEESEEHEN li 12 GB ATT 26dk P amp U Pra 9 5 3 7 8 Fig 21 NR 900EMS LCD under various operation modes Ma
14. as adjusted during the last operation and stored in the device memory Fig 23 NR 900EMS LCD view after switching on the device Headphones volume control is in the state that was adjusted during the last operation The device transmitter is off state in this mode while its receiver is active This mode allows operator to control and evaluate an interference level at the operating frequencies Moreover the following adjustments are available for an operator Headphones switching over amongst the 2 nd amp 3 rd harmonica outputs 3 2 button Input signal attenuation adjustment o buttons Headphones volume control lt q p buttons 20 NR 9D0EMS User s Manual 4 2 2 300 mode 2 button repeated stroke activates NR 900EMS main operating mode 300 searching At that the following working parameters are set on default fig 24 Minimum probing signal output level Pmin 10 dB input signal attenuation ATT 10 dB Headphones are coupled to the 2 nd harmonic output 8 2 eet pa 3 BREE n 15 dE HATT 38d6 ft fae L mur Fig 24 LCD in a 300 mode 1 LCD lines that corresponds to the 2 nd amp 3 rd harmonic signal 2 Relative 2 nd amp 3 rd harmonic level in dB in pseudo analog form 3 The same in digital form 4 2 nd and 3 rd harmonic level difference in dB see fig 25 plus stands for 2 nd harmonic level excess over the 3 rd one 5 P
15. ger cabin by any kind of transport Prevent the device in standard packing from shock and vibration Store packed device under the temperature from 5 up to 40 C and relative humidity no more then 80 at 25 C Rechargeable batteries should be stored in charged state 46 NR 9D0EMS User s Manual FOR NOTES
16. ition right on spot of searching operation In its turn this interference is arisen from casual non linear scatterer that cannot be moved away from the place of operation 12 2 Scan antenna system slowly over the surface or item under control Hold antenna main lobe at a right angle to that surface fig 49 Q N Fig 49 Antenna system scanning diagram 12 3 After audio signal arising in the headphones localize it referring LCD indication and the highest level of that audio signal To do this Alter antenna system position and orientation Switch over probing signal level pushing PWR button Alter receiver sensitivity pressing buttons 34 NR 900EMS User s Manual 12 4 Comparing the level of the 2 nd amp the 3 rd harmonic evaluate their ratio and draw the conclusion about the nature of the revealed object Significant 2 nd harmonic level excess over that of the 3 rd one fig 50 with a great probability testifies that an object under control contains industrial semi conductors i Pa TE 2 nd harmonic See ee Yl _ level is higher D Sees then the 3 rd one log se Pag Fig 50 Industrial semi conductor indication on the device LCD Otherwise most probable reason of the target response is so called corrosion diode see fig 51 3 rd harmonic Sees level is higher Hash haaseaic ase ER NEE 4 S 371205 ATT 00dE the 2 nd one Fmir Fig 51 Corrosion diode i
17. ndication on the device LCD 12 5 For specifying searching results switch to 20K mode pushing 300 20k button see also fig 29 Use audio monitoring via headphones to control target reaction to the outside mechanical impact Mostly that will help to determine the type of the target revealed NR 900EMS User s Manual 35 13 Operation termination and packing 13 1 Press 5 button to switch off the device NOTE If necessary use Sleep MODE and subsequent automatic device switch off with operator s favorite adjustments storage 13 2 Unplug headphones Control unit cord and HF antenna cables from the Main unit 13 3 Push in telescopic rod fig 52 and put antenna system into shipping storage position fig 53 NOTE Pushing in the rod hold it vertically with antenna system up to prevent HF cables damage Fig 52 Telescopic rod pushin in order 13 4 Put all units and accessories into packing bag Fig 53 Telescopic rod with antenna system adjusted for storage and transportation 36 NR 9D0EMS User s Manual NR 900EMS packing order Stow the device appliances into corresponding pockets of the transportation bag and close their cover fig 54 Place the main unit on the bottom of the bag fig 55 Fix the unit with an appropriate belt and Velcro fastener fig 56 Lay antenna HF cables and Control unit cord above the Main unit body preventing their small bending radius
18. odes from industrial ones 1 e false alarm from electronic items fig 7 20K signifies that probing MODE ak signal pulse repetition frequency 3 is around 20 kHz Fig 7 LCD in 20K mode Under mechanical impact another words light knocking and tapping a typical modulation of the reflected signal appears in the headphones that corresponds to rhythm of an impact That phenomena results from the corrosion diode electro physical parameters alteration caused by A M impact fig 8 While the reaction of a real industrial semi conductor remains constant and clear not subjected to any mechanical effect Fig 8 Typical items with a great number corrosion diodes Listen mode is an optional one Probing signal transmitter is turned off in this mode while the LISTEN receiver is active fig 9 HT T 18dE In this case an operator obtains a Pott chance to check the environment and to make sure of the absence of interference at working frequencies Fig 9 LCD in Listen mode 10 NR 9D0EMS User s Manual Sleep mode is a so called service mode fig 10 It is intended for the device prompt revival after short interruption in search operation Fig 10 LCD in Sleep mode NR 900EMS is power supplied by dedicated built in Li Ion rechargeable battery 7 4 V 4200mAh Use standard Charger unit supplied for battery charging The use of other chargers ts strictly
19. rked screen numbers correspond to the table 3 lines NR 900EMS User s Manual 15 Operational data on a LCD screen Table 3 1 2 nd harmonic relative signal level pseudo analog 2 2 nd harmonic relative signal level digital 3 3 rd harmonic relative signal level pseudo analog 4 3 rd harmonic relative signal level digital 5 2 nd amp 3 rd harmonic value difference plus icon stands for the 2 nd harmonic excess over the 3 rd one 6 Headphones icon Q points out what receiver output 2 nd or 3 rd harmonic is connected to the headphones 7 Probing signal level Pmax Pmin Poff 8 Actual attenuator value 10 20 30 40 50 dB 9 Rechargeable battery acting voltage 10 20K mode 11 LISTEN MODE 12 Sleep MODE 13 LCD contrast adjustment and its numerical value in conventional units 14 Averaging out constant adjustment and its acting value NR 900EMS control buttons fig 22 and table 4 Control buttons Fig 22 Control unit buttons 16 NR 9D0EMS User s Manual 4 1 4 NR 900EMS USER S INTERFACE Table 4 Pune NR 900 EMS LODdaa symbol The device is switched off Single stroke Listen mode AC 16 E ATT 16dB Second stroke Fatt Search mode HE eee gt See T 12 dB ATT 104 The device is switched on t 7 6 VY Prin Single stroke Switching off without operator adjustment storage 7 AT LLLI ee a switching over Pmax Pmin oti dE ATT BA JE
20. robing signal output conventional value P max P min see fig 26 6 Attenuator acting value for the received signals see fig 27 7 Built in battery effective voltage at the present situation NOTE After battery discharge below 5 7 V a typical melody warning signal can be heard in the headphones accompanied by the words BATTERY EMPTY on LCD screen In this case charge the battery as soon as possible 8 Headphones coupling indication to the 2 nd or 3 rd harmonic output accordingly see fig 28 NR 900EMS etl ab f Tab ATT 1063 Prmir E Prmir User s Manual 21 Fig 25 2 nd and 3 rd harmonic level difference for instance 17 3 14 dB Fig 26 Probing signal output level adjusted by PWR button Fig 27 Acting attenuation value 0 10 20 30 40 50 adjusted by buttons Fig 28 Indication of headphones coupling to the 2 nd or 3 rd harmonic output 22 NR 9D0EMS User s Manual In 300 mode the following settings are available for the operator Headphones switching over among the 2 nd amp 3 rd harmonic outputs 3 2 button Input signal attenuation adjustment o buttons Headphones volume control lt gt buttons 4 2 3 20K mode 20K mode can be activated by 300 20K button Received signal level value is not displayed in this mode fig 29 Probing signal output level adjustment is not available in this mode MODE _ ER Fig 29 LCD in 2
21. s certain numerical value evaluated in some conventional units fig 31 Fig 31 LCD contrast scale Display contrast setting can be done by buttons and is available only from this menu page 24 NR 9D0EMS User s Manual Averaging out constant adjustment The next a keystroke switch LCD into the mode of so called averaging out constant adjustment for received 2 nd amp 3 rd harmonic signals The words AVERAGE a ieee ae CONSTANT appears on the s NY ie rk ari screen with its numerical value beneath the line fig 32 Fig 32 Averaging out constant adjustment Available averaging out constant value is as follows 1 2 4 8 16 The higher the averaging out constant value the lower the noise in an output signal while the device reaction get more inertial The averaging out constant value is adjusted by the operator to the current searching process by means of buttons The chosen constant value is stored in a device nonvolatile memory and automatically restored later on until an operator will alter it The next 3 keystroke returns the device to an operational mode from which all these manipulations were started NOTE In spite of various menu pages displayed on LCD screen the device continues to operate in the mode when the menu review was started After all menu pages were run over LCD goes back to the first one 4 3 NR 900EMS Power supply
22. t NR 900EMS antenna system to imitator from the 0 5 0 6 m distance see fig 46 f Imitator Fig 46 NR 900EMS operation test by means of standard imitator 11 5 Typical audio signal will be head in the headphones while the LCD shows 2 nd and 3 rd harmonic level 32 NR 9DO0EMS User s Manual 11 6 Gradual imitator moving away from the antenna main lobe will cause audio signal muting as well as displayed signal level decrease B T TTT on LCD see fig 47 T semeeep NOTE The antenna system should be in a_ standing position Fig 47 Harmonic level decrease NOTE Flat battery status is indicated by a typical melody in the headphones In that case switch off the device immediately and charge the battery by means of Standard charger supplied Otherwise the device will be switched off automatically after repeated above mentioned melody warning 12 Searching operation order 12 1 Carry out searching of semi conductor elements eavesdropping devices under maximum transmitter output and the highest receiver sensitivity Pmax amp ATT 00 dB at the fig 48 That will provide an ultimate searching efficiency Pari fT dT LT hfs co t15 GBR t r lM Fig 48 Searching mode working parameters NR 900EMS User s Manual 33 NOTE In every specific case NR 900EMS operating parameters transmitter output and receiver sensitivity are determined by the real noise and interference cond
23. tural non linear elements so called corrosion diodes 4 NR 900EMS User s Manual 2 NR 900EMS Complete set Fig 2 NR 900EMS NLJD complete set NR 900EMS Complete set Table 1 1 Main unit transceiver 1 2 Telescopic rod with antenna system 2a connection l cables 2b and control unit with indication panel 2c 3 Built in rechargeable battery 1 Charger l 5 Charger adapter 1 6 AC power adapter 1 NR 9D0EMS User s Manual 5 7 Car adapter 1 9 Headphones 1 User s manual 1 3 Main technical characteristics Table 2 Receiver sensitivity under 6dB s n ratio Not worse then minus 138 dB W Standard imitator detection range under high transmitter output amp maximum Not less 1 m receiver sensitivity Antenna power gain transmitter antenna Not less 6 dB receiver antenna Not less 8 dB Directional diagram back lobe level Not more transmitter amp receiver antennas 15 dB 6 NR 900EMS Operational conditions temperature temperature limiting value relative humidity Power supply Continuous operation time searching mode 20K mode Weight Transceiver unit with rechargeable battery Telescopic rod with antenna system Complete set in standard packing 4 NR 900EMS principle of operation User s Manual 5 40 C 20 C n 450 C Not more 85 under25 C Built in rechargeable battery Not less 8 h Not less 4 h Not more 2 5 Kr
24. udio level in the headphones Fig 22a Headphones volume control while 32dB to its minimum adjustment scale Volume adjustment step 2dB Press 4 or gt button to adjust the right audio signal level in the headphones and release the button NR 900EMS will return to the previous operational mode automatically with a corresponding audio level alteration in the headphones At that after volume control button release the main operational mode window appears on the LCD Note the adjusted audio level will be stored in a device nonvolatile memory till the next volume control adjustment d or gt button has an auto repeat facility If one press and hold 4 or lt button only graphic representation in the window is altered Please note the audio level alteration in the headphones is carried out several seconds after 4 or gt button was released and is confirmed by a shot audio signal NR 900EMS User s Manual 19 4 2 NR 900EMS operation modes 4 2 1 Listen mode After switching on the device using button the Listen mode get active The following initial data are displayed on LCD screen fig 23 1 Transmitter is switched off 2 Receiver is active in the Listen mode 3 Headphones are connected to the 2 nd harmonic output 4 Attenuator is in 10 dB mode 5 The Averaging over constant data corresponds to the value that w
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