RT-600 & SAR-DF 517
Contents
1. sees 14 GOSPAS SARSAT D code VVIBIdOW sisssira lei 15 121 500 MHz Bearing Window in COSPAS SARSAT Mode ooooccccccocccccconccnconnconononcnnconononnononcnnnnnarononnnrnnonnncnnnnnos 16 Display in COSPAS SARSAT Scan Mode picis terne ii 16 Mee a o 0 A 18 O aly Mode Ment OPINAS uns ollo 18 ID Edi ng SUD n e NR ER ART PRA 19 ID Only Mode Menu with defined ID coa coco 19 AutoSquelch during Med Track Operation oocccccocnccocncocononoconnnononnnconnnononnnonnnnonnnnnonannnonnnnnonnnnnonannnnonnnenananenanos 20 Frequency Selection Page and Operating Elements occcooccncccoccnnccnoccncnnononnnnnnnnnonnconnonancnnonnnrnnononnnnnonanennonanens 21 MEMO Fage errta Ut mmt 22 Accessing Set Rage rior cri DENT bu ERE Dau 23 A Page NET DP ees 24 EMO Message entabla oie soles ica 25 Mounting drawing orte atenrid nds 26 Mounting hole pattern for the disSplay occcococnocococnnccconcnnnonannnnononononnnnonnnnannnnononnnnonnnnnnonannnnnononnnnnnnnnnnnnnaness 29 Connecingrcable mue NE mu 29 Drawing Or Dis Plis teo ito llo iodo da 32 igen ae Wb Dead antena ina HH 33 MMOS Serial Data Protocol sere E HT a ad 37 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 1 General information RHOTHETA Elektronik GmbH is the developer and manufactu2. M a 9 LAA QUE MN Tm 10 222 Direction Finder MOGS a aia 12 2 2 1 Operating Elements in Bearing Mode coooococccccconcccncncoconcnnnonanoncnnonnnnononnnnnnnnnnnonannnnnnnnnnnnnanoss 12 2 2 2 Standard Display in Bearing Mode occcccooccccccocnococconononaconnonannnnononnnnnonannnnnnannnononnnnnnnannnnnnananss 13 2 2 3 Special Options in COSPAS SARSAT Bearing mode cccooccccnccncccccncconcnonocononnnnnnonnnonnononnnnononnnononos 14 2 2 4 COSPAS SARSAT Decode Window s lotte enun on deren eser ead pecu eaae enge dtl 15 2 2 5 121 500 MHz bearing Window in COSPAS SARSAT mode cooooccccnnccncconcnnccnnccnconononnonnncnnonanencnnanons 16 220 COSPAS SARSAT Scam MOodgG uss e tdeo ett ed ld olas Ld ed 16 2 2 f Marine Ship Scan MOdeG oo eaedem tae ecu e eeu Mies pd 17 2 3 Law Enforcement and Medical Operation cccocccccccncocccnnoccnnocononononnononnnononononannnonannnnnnnnnnnnnnnnnnnnnanannss 18 Ziel ODAC inco E 18 202 EISUN OUO uotum AM tn MUN RM IM E 20 2 oo Med ack Page S enre e 20 2 3 4 Law Enforcement Scan Mode cit AA A Eine 20 2 4 Frequency Selection Page sarra aos 21 2 4 1 Frequency Selection Page Standard Version occccocccncoconnnncccnnnnconononnnnnnnncnnnnonnononcnnonnnnnnnonarennnnnnos 21 2 4 2 Frequency Selection Page Law Enforcement VersSiQN cccconnccccconcncononcnnconacnnonononnononnnncnnanonnononos 22 2 9 MEMO T SUB sia iii ac 22 200 5e 1 oA pe E san ee eee ee ee A thes A EE E
3. 1 Warning use only for pulsed signals as example CpSarsat LoJack 10 not used for normal operation any byte values allowed 11 Internal Dimming 0 100 Checksum is the 2 s complement of the modulo 256 sum of all bytes without checksum byte 0 n 1 Timing The serial output takes place cyclic each 250 ms without request All available internal values are sent out as a binary coded data stream Cycle time approx 250 300 msec Serial output 39 databytes approx 40 msec Header Number Data bytes Optional serial input 13 databytes max 50 msec Header Number Data bytes ME ENE E Timing Serial Data Protocol Lc
4. In case of rooftop installation e g on land vehicles Top shall be selected In case of bottom down upside down installation e g on a helicopter Bot shall be selected If this option is not selected correctly all bearing values will be mirror inverted gt Bearing Offset menu option to include a constant offset correction to the bearing indication Bearing values in degrees will be changed according to the offset value gt Maximum External Dimming Voltage for Legends menu option which sets the upper limit of the dimming input voltage for the legends panel Range 1 5 28 V gt Minimum External Dimming Voltage for Legends menu option which sets the lower limit of the dimming input voltage for the legends panel Range 1 5 28 V gt Page lt rotary switch to be turned right hand to go back to the Direction Finder page A left hand turn on this rotary switch will show up an additional service page with debug information used for system checks 24 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 3 Error messages If an internal error of the device is recognized a corresponding flashing error message will be shown in the DF pages MERA A 5 ni IL ri Error message Error Message Error location 1 Error message including error code in brackets 2 Short description of the indicated error In case of coincidence of various errors the error wi
5. 2 X ON OFF AT 000 r gt L E huoc FRU A y NE a Operational Elements in Bearing Mode The picture above shows the state of the display while the equipment is operated on the international emergency frequency 121 500 MHz with an active signal being received 1 gt FREQUENCY lt Rotary switch selecting the active frequency The last selected frequency remains stored after switching off on the device The selected frequency is shown on the graphic display bottom right Above additional information for the selected frequency is displayed The use of the rotary switch activates a sub page Please refer to the Frequency Selection section for details 2 VOLUME Rotary switch to adjust the audio output level The volume of a linked external speaker or amplifier can be adjusted in a range from O off to 99 maximum loudness The selected volume is shown in the bottom left corner of the graphic display The volume remains stored after switching off on the device 3 gt Squelch Level lt adjusts the squelch level The squelch level has to be above the receiving level without signal noise Only signals above the squelch level are audible in the loudspeaker and used by the direction finder for bearing indication The gt SQL lt rotary switch allows to select the squelch threshold i e a minimum signal strength of an incoming signal to be processed The current settings on a signal level scale from 0 to 60 is shown in bright le
6. SN Ratio Setup the squelch level is set slightly higher than the noise level Using the SQL rotary switch 1 the user would be able to force the squelch level to a manual setting Automatic setting can be re entered by setting the manual setting to lt 0 9o or gt 60 Strong short receive signals will not modify the squelch level setting If the squelch functionality is controlled by the system without user interactions being allowed this is indicated by a X sign c above the squelch level marker 11 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 2 Direction Finder Mode Generally the direction finder mode is used to track bearing information towards a transmitter lt shows all basic information depending of the kind of signal to be tracked Mainly differences in how information is displayed are related to the information content of tracked signals Basic information and basic operational possibilities are applicable for signals with no additional information content such as 121 500 MHz sweep tone modulated SAR beacon signals In case of signals with additional information content such as COSPAS SARSAT data messages additional sub pages may be activated 2 2 1 Operating Elements in Bearing Mode A 1 J Cir Store Rep 9 S F ME d ZFA FAN SDMA San ia i f A Ik EN HE y i L EHERGEDCY B A ul sil c Direction Finder RHOTHETA h E
7. given If a signal can be distinguished from noise and other signals by its message content e g LoJack ID only transmissions containing the required message content are used for bearing In other cases the squelch can be used to suppress unwanted weak signals and noise A squelch level called threshold has to be set by the user or automatically by the system All signals which have a level below this threshold value will be ignored Signals above this level will cause a bearing indication As a result a signal to be used for bearing has to be so much stronger than the noise or disturbing signals that the receiver can clearly distinguish between wanted and unwanted signals The result of this requirement is that the sensitivity is reduced to the level set by the squelch threshold This results in a reduced maximum distance to the transmitter However it might be desirable to achieve bearing information even for weakest possible signals which are very close to the noise level In this case it is possible to reduce the squelch level below the noise level As soon as the modulation of a signal can be heard in the loudspeaker it can be expected that bearing is possible If the noise itself is a randomly distributed noise so called white noise and there is no other signal receiver the bearing indication itself will be randomly distributed If the noise is not white noise but a disturbance bearing will show to the source of the noise If t
8. the receiver is able to decide himself which squelch level is best suited for normal operation In such cases an automatic squelch is provided The threshold is automatically set to a value higher than the calculated noise level The difference in dB between noise and threshold level can be defined in the Setup Menu Refer to the chapter Setup Page for details During automatic squelch operation the user has the possibility to force the squelch into manual mode but has to care about the operational limitations described in this chapter In cases where the Antenna Unit checks signal validity autonomously and without useful possibilities of user interaction user interaction is not possible and the squelch purely follows internal rules appropriate to the kind of received signal 240 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 Examples of different squelch settings Five Examples for Squelch operation Without received signal the noise level a is below the correctly chosen squelch level b The receiver audio output remains quiet and no bearing is indicated With the same received noise level a but wrongly set squelch level b there will be an erroneous noisy bearing available if there is no receive signal available at that time If the squelch is operating in automatic squelch mode this is indicated by a sign A c above the squelch level marker Depending on the
9. 875 MHz 156 325 MHz 160 925 MHz 156 375 MHz 156 425 MHz 156 475 MHz 156 525 MHz 156 575 MHz 156 625 MHz 156 675 MHz 156 725 MHz 156 775 MHz 156 825 MHz 156 875 MHz 156 925 MHz 161 525 MHz 156 975 MHz 161 575 MHz 157 025 MHz 157 075 MHz 161 625 MHz 161 675 MHz 157 125 MHz 161 725 MHz 157 175 MHz 161 775 MHz 157 225 MHz 161 825 MHz 157 275 MHz 161 875 MHz 157 325 MHz 161 925 MHz 157 375 MHz 161 975 MHz 157 425 MHz 24 162 025 MHz User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 6 2 Serial interface data protocol short description Interface RS232 9600 Baud 8 databits 1 stoppbit no parity Specification serial output There is send out cyclic 250ms 300ms a binary datastream 39 bytes which contains all relevant DF bearing informations The datastream starts with a header value OxAO as ld for bearing mode The next bytes contain different values for status bearing information and also service The last byte is used for datastream checksum control Remark This is a binary data protocol So every byte value from 044 2094 0x00 OxFF is possible Because of this it is not allowed to realize a start byte detection by the content 0xAO The idle line detection is recommended for detection the end of message Timeou
10. E lt Rotary switch to leave the DF mode in order to switch to the MEMORY MEM Page Mode 2 2 2 Standard Display in Bearing Mode 1 2 3 4 5 Direction Finds Display in Bearing Mode gt Relative Bearing value lt by means of a sophisticated averaging procedure a steady display is accomplished either as graphic display or as text in the range of 0 359 0 corresponds to bearing direct ahead gt Spread lt maximum deviation of un averaged bearing values This is an indicator of bearing quality The wider the range between the directions of maximum deviation the worse the received signal is As a result of the excellent averaging procedure even with a spread of 45 good bearing results are achieved gt Receiving level lt field strength of the signal as a relative percentage value visualized as bar graph indication and as decimal value Even without a received signal a certain noise level may be displayed gt Squelch level lt independently adjustable and stored for each frequency Squelch level is indicated as marker at the Signal Strength Bar Graph or as direct relative level value A usable bearing analysis can only be achieved if the squelch level is above the noise level without received signal If the antenna unit is placed close a heavily disturbing electronic devices the squelch level has to be raised thus making the direction finder being less sensitive In receive modes where the sq
11. EIT E eee ped ansa en E 23 ERROR MESSAGES saros a S 25 INSTALLATION cout 26 A ROME A 26 4 1 1 Influence of the antenna unit location and the environment on the bearing accuracy 2f EZ ISA to dit a 29 43 Cable CONNECUON WIN A dE 29 TEGHANICALDA TA nta eds 30 A on 210 fg 654 252 11 AAA A mM E eM 30 A 31 59 Mechanical Salles ari td iodo 32 APPENDIX cene dd 34 6 1 Frequencies of channels on maritime band cccoccccccccnccccnnccccnnnoncnnonnnnnonnnonnnnnonnnnnonnnnnonnnnnnnnnnnnnnnnnonaness 34 6 2 Serial interface data protocol short descriptiON cocooncccccconcnnccoonnconononnnnoncnnnnnnnnnnonncnnonnnrnnonnannnnnnonens 35 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 List of figures Control UIC OV CPW nd iros id decoradas doli 7 miel cei hissen aa PH M 8 PAGS SeleellOlissuiontestuntdotulis tuto uut totu iet oto ibatut lion io 9 DIMMAN SCUD NN NN 9 Five Examples for Squelch operation ooccccoccncccnnnccccnoconononocnnononnnonnnnonannnonnnnnonnnnnnnnnnnnnnnnnnnnnnannnnnnnnnnnannnenanenes 11 Operational Elements in Bearing Mode cccccssscecccssseecceeeeeceeseeecseuseeeceaueeessageeeseaueeessaeeeessageaeessegeeesssgeeeenss 12 Display Im Beano Modemer asa a boi 13 Operational Elements and Display in COSPAS SARSAT Bearing Mode
12. Exit lt hotkey F2 push button allowing to directly switch back to the normal operating mode on the currently selected frequency If the exit hotkey is not pressed the direction finder will fall back into the operating mode automatically after ca 5 seconds of user inactivity 2 4 1 Frequency Selection Page Standard Version In the standard version of the equipment the frequency selection page offers a set of 17 different choices organized in 4 blocks which can be selected by the user Frequency selection options for the standard version of the RT 600 Block 5 Block 1 Block 2 Block 3 Block 4 dba Memory Channels lt gt Fix Frequencies lt gt COSPAS SARSAT lt gt Tem T Scanning of the maritime Memory AUX 121 500 MHz AIR VHF Emergency 406 022 406 028 MHz Scanning of all COSPAS SARSAT frequency band Memory 1 156 800 MHz Maritime Channel 16 406 031 406 037 MHz frequencies as defined in Block 4 Memory 2 243 000 MHz AIR UHF Emergency 406 040 406 043 MHz Memory 3 406 046 406 052 MHz Memory 4 406 055 406 061 MHz 406 064 406 070 MHz 406 073 406 076 MHz 21 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 4 2 Frequency Selection Page Law Enforcement Version In the law enforcement version of the equipment the frequency selection page offers a set of 20 different choices organized in 5 blocks which can be selected by the user Frequency sele
13. FF if the value OxFFFF then no valid bearing is available otherwise this value contains the actual averaged bearing information in Deg 0 359 Example 0X0114 gt 276 bearing left side oriented to heading e Bearing Live Min Max byte 30 31 amp 32 33 gt 16 bit values Range 0 359 OxFFFF Only for signal quality or additional information NOT recommended for bearing indication The relative live bearing field contains the max min bearing in degrees without averaging The relative live bearing reacts faster than the normal relative bearing but it has not the precision of the averaged bearing The Min Max Bearing Values are calculated within a time period of approx 250ms If they are very close together for example 124 and 128 degrees then the signal quality is quite good A wide span of the min max values for example 97 and 162 shows very noisy but nevertheless bearable signal quality 36 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 Specification serial input optional The serial input is normaly only used for service and maintenance Nevertheless it is possible via this interface to remote control the actual frequency and the squelchlevel of the DF system If a valid datastream is send to the DF then the actual frequency selection at the DCU is switched to Block2 AUXO At this memory channel the new frequency is stored and used auto
14. S SARSAT Scan Mode 14 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 24 COSPAS SARSAT Decode Window The COSPAS SARSAT Decode Window allows decoding incoming COSPAS SARSAT data messages 1 2 3 4 5 6 7 8 9 my Direction Finder M ann wt O u COSPAS SARSAT Decode Window gt Exit lt push button F1 button allows to leave the decode window and to go back to the COSPAS SARSAT bearing mode window gt Decode lt in the upper right corner of the display indicates that the decode function is activated gt Country lt displays the COSPAS SARSAT Country Code coded into the received data message gt Last Signal lt time since the last COSPAS SARSAT message has been received in minutes seconds format gt Position lt field showing in case of location protocols being used by the beacon the encoded GNSS position data latitude longitude transmitted by the beacon gt Range lt field showing the range of COSPAS SARSAT channels covered by the actual receive frequency setting gt 15 HEX ID lt 15 HEX ID of the beacon in hexadecimal format gt Data string lt of the bits 25 to 112 of the COSPAS SARSAT data burst in case of short messages and bits 25 to 144 in case of a long message format The last 8 Hex Values are separated by a blank Bit and Frame synchronization hex values Bits 1 to 24 are suppressed to increase the readabili
15. User Manual Installation and Operating RT 600 SAR DF 517 Wideband Precision Direction Finder with extended COSPAS SARSAT range amp special scan modes e Standard Version e Law Enforcement Version HOTHETA ur RT E00 7 i User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 Edited by RHOTHETA Elektronik GmbH Kemmelpark Dr Ingeborg Haeckel Str 2 82418 Murnau Germany Tel 49 8841 4879 0 Fax 49 8841 4879 15 Internet www rhotheta de E Mail email rhotheta de Copyright RHOTHETA Elektronik GmbH All rights reserved Issue 2009 09 22 Rev 2 02 d e Edition valid for DCU Systemstatus 4 04 amp Software Rev 3 15 e Edition valid for AU Systemstatus 5 05 4 Software Rev 3 10 LoJack is a registered trademark of LoJack Corporation Note The manufacturer reserves the right on making modifications of the product described herein at any time and without previous information 2 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 Index GENERALINFORMATI N cusco A A A A A 5 1 Purpose of Use Of the direction Ide in 5 PASA APP TUE 6 ES DO Mal DaS ad Usen Sapa ra 6 OPERA TING PE A aaaea aa aa araa 7 2 1 General Operating PrimGl PleS ia oi ape DUAE 7 2 1 1 Power Orn PEO CU dolina LOI MM PULLS 8 22132 Mal P agos S ee eme 9 21 DINMAG UNCION oet
16. alue in steps of 5 percent while a left hand turn will reduce the value in steps of 5 percent Dimming Setup After ca 3 seconds of user inactivity the display falls back into the prior main page The adjusted brightness of the display will remain stored after switching off the unit Dimming of legends may be performed in two ways using the internal dimming settings as for the LC display itself or using an external remote dimming voltage provided by the aircraft Internal dimming on display unit of legends Internal dimming is always active if the external dimming input is not connected or if applied voltage is below 1 V DC Refer to the wiring plan The legends are dimmed in the same manner as the LC display External remote dimming of legends As soon as there s a voltage gt 1 V DC at the dimming input the brightness of legends is controlled externally by an analog signal Refer to the wiring plan and to the operating setup menu description 9 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 1 4 Squelch Operation The main challenge in direction finder operations is to only use the signal transmitted by the destination for calculation of the bearing Noise and other disturbances shall not cause misleading bearing indications In order to prevent the direction finder to calculate bearing results which are mislead due to noise and disturbances several means are
17. ates signal receiving Bit O 0 then no signal is received and so on no bearing is available Bit O 1 then beraing is possible Bit 1 if 1 then Squelch is controlled by AU active at modes CospasSarsat Decode CospasSarsat scanning LoJack with FilterzID only e Error bytes 4 5 gt 16 bit value each set bit corresponds to the error no Refer to the chapter Error messages Example 0x0000 gt No error 0x0800 gt Bit No 11 Set No AU Error e Actual DCU Page byte 6 indicates actual operating mode of DCU O standard bearing page 1 frequency memory page 2 CospasSarsat decoding page 3 LoJack decoding page ID edit e Frequency bytes 8 11 gt 32 bit value actual adjusted frequency Hz Example OxO73DF 160 gt 1215000000 gt 121 5 MHz e Active Band Standard Version O VHF Airband 1 VHF marineband sea 2 VHF marineband coast 3 UHV airband 4 CospasSarsat LE Version O VHF Airband 1 LoJack 2 Lifesaver 3 ETS 4 CospasSarsat e Actual Squelchlevel byte 13 Range 0 60 96 without signal the actual squelchlevel should always be adjusted a little bit over the noise level Refer to the chapter Squelch operation e Level byte 27 Range 0 99 actual receiving level without signal this value is equal to the noise level If a signal is received then this value corresponds to the signal strength of this signal e Relative Bearing averaged byte 28 29 gt 16 bit value Range 0 359 OxFF
18. brightness Supply voltage range 12 V to 35 V DC Current consumption L CD background light Off max 350 mA 12 V DC 200 mA 24 V DC LCD background light 100 max 600 mA 12 V DC 300 mA 24 V DC Undisturbed wave field and sufficient field strength proposed Measuring by changing the angle of incidence the bearing antenna rotates ona revolving table in order to eliminate influences of environment to the bearing result Very weak signals can considerably increase the time of response 30 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 5 2 Interface External connections optional at Sub D 9 pol Connector X4 male Dimming Analog input signal for variable control of the legends illumination Input voltage range is freely adjustable in the range of 1 5 28 V in the setup menu Refer to chapter Setup Page Default setting 8 28 V 8 V Off 28 V max dimming for legends external voltage input for variable dimming of legends optional Input Impedance gt 50 kQ Low active as example switch to ground night status line for LCD At input voltage lt 2 5 Voc the LCD dimming operates in night NVG ee mode Maximum brightness ca 4 of day default mode brightness dimming optional Input Impedance gt 50 kQ Low active as example switch to ground NVG status line for LCD At input voltage lt 2 5 Vpc the LCD dimming operates in ni
19. ck Valid LoJack ID 216 4875 MHz ETS Squelch Level 216 5125 MHz ETS Squelch Level 219 930 MHz ETS Squelch Level 219 960 MHz ETS Squelch Level 20 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 4 Frequency Selection Page If the frequency selection page has been activated by using the frequency selection rotary switch the frequency selection page opens The frequencies which can be selected consist of several frequency blocks Memory Channels Special Application Frequencies COSPAS SARSAT frequencies and scan modes i i Frequency Selection Page and Operating Elements 1 gt Frequency lt information field showing all necessary information on the selected frequency such as frequency in MHz memory channel in case of memory frequencies purpose of the selected frequency 2 gt Marker lt showing the currently chosen frequency on the frequency scale 3 gt Frequency scale on which a frequency can be chosen The frequency scale is organized in frequency blocks The name of the frequency block is indicated below the frequency scale They are Law Enforcement scanning frequencies Law Enforcement version only Memory Channels Fix pre programmed frequencies COSPAS SARSAT frequencies COSPAS SARSAT scanning frequencies 4 gt Frequency selection rotary switch allowing to select a frequency by moving the marker along the frequency scale 5 gt
20. ction finder mode is highlighted by dark background and bright ciphers on the frequency field Application Information field showing to which frequency band and application a frequency belongs to gt Channel selection lt rotary switch used to select which memory channel shall be active for modification or transfer into direction finder mode gt MHz lt rotary switch used to modify the selected memory in steps of 1 MHz gt kHz lt rotary switch used to modify the selected memory in steps appropriate to the concerned frequency band Depending on the frequency band different frequency step sizes are pre programmed 22 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 Frequency Range Step Size Application Band Applicable for 118 000 123 000 MHz 8 33 kHz Air VHF ERAN Law Enforcement Version 156 000 162 025 MHz 25 kHz Maritime VHF Standard Version Only 164 000 174 000 MHz 12 5 kHz LE LoJack Law Enforcement Version Only 201 000 215 995 MHz 5 kHz Med Track Law Enforcement Version Only m IESO 12 5 kHz LE ETS Law Enforcement Version Only 219 000 220 000 MHz 10 kHz LE ETS Law Enforcement Version Only 240 000 246 000 MHz 8 33 kHz Air UHF Standard Version Only 400 000 410 000 MHz 8 33 kHz CP SAR SAT Ane vere Law Enforcement Version 2 6 Setup Page System setup functions are available in the setup page The functions desc
21. ction options for the law enforcement version of the RT 600 Block 5 Block 1 gt Block 2 Block 3 c Block 4 o ute Memory Channels Fix Frequencies COSPAS SARSAT dde id Scanning of LoJack and ETS Memory AUX 121 500 MHz AIR VHF Emergency 406 022 406 028 MHz Scanning of all COSPAS SARSAT frequencies as defined in Block 3 Memory 1 1xx xxx MHz LE LoJack Recovery USA 406 031 406 037 MHz frequencies as defined in Block 4 Memory 2 216 4875 MHz LE ETS Std Freq 406 040 406 043 MHz Memory 3 216 5125 MHz LE ETS U Cover Freq 406 046 406 052 MHz Memory 4 219 930 MHz LE ETS Std Freq old 406 055 406 061 MHz 219 960 MHz LE ETS U Cover Freq old 406 064 406 070 MHz 406 073 406 076 MHz 2 5 Memory Page If the memory page is selected the user is able to program the five available memory channels After selecting and or modifying a memory channel switching back to the direction finder page will take over the currently selected memory channel to the direction finder mode 1 2 3 4 5 6 MEZ E TU UN Direction Finder RHOTHETA i i P Hug di 1 3 Memory Page gt Channel Name lt field indicates the name of the channel which is re used in other displays as name of the currently used frequency AUX 1 4 gt Frequency lt field shows the frequency currently stored for each channel The memory channel currently selected for modification or for transfer to the dire
22. cy has been selected the standard bearing page is slightly modified 1 The squelch level is set automatically indicated by a letter gt A lt above the squelch level marker lt is recommended to leave the squelch in automatic mode 2 To reactivate the automatic squelch mode after unintentional manual modification of the squelch level manually increase the squelch level through the gt SQL lt rotary switch to the maximum value 60 AutoSquelch during Med Track Operation There are no special functional options available Reception of a signal above squelch level is indicated by an acoustic signal beep tone Med Track frequencies always have to be selected through the MEMORY page i e the receive frequency has to be a memory channel selected through the frequency selection page 2 3 4 Law Enforcement Scan Mode If the Law Enforcement Scan Mode has been selected the receiver scans ETS and LoJack frequencies for signals On the LoJack frequency the receiver is staying receiving for a longer period of time The scanning criterion is the reception of a LoJack VLU signal with valid LoJack ID On the ETS frequencies normal manual squelch settings for ETS frequencies are used and the scan mode stops as soon as a signal is being received Reception of signals which stop the scan mode will result in the appropriate bearing page to be activated Frequency Application Criterion Country Specific LoJack Frequency LoJa
23. d by other equipment on the aircraft size User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 3 Law Enforcement and Medical Operation The functions described in this chapter only apply to the law enforcement version of the direction finder equipment Law enforcement direction finders are able to track transmitter for LoJack stolen car recovery ETS stolen money carrying cases recovery Med Track for persons in helpless situations recovery 2 3 1 LoJack Pages After selecting the LoJack frequency through the Frequency Selection Display the LoJack bearing window is displayed Di rection Finder RHOTHETA LoJack Bearing Screen 1 gt Automatic Squelch lt indication It is strongly recommended to operate the receiver with automatic squelch sensitivity setting in case of LoJack operation However manual setup of the Squelch level would be possible Please refer to the chapter Squelch Operation for details 2 gt ID Filter lt hotkey F2 push button Allows activation of ID only mode This filter mode allows receiving one single LoJack transmitter identified by its ID The shown text FILT OFF indicates that no filter has been activated yet After activation of the ID only mode the user is asked by the system to enter an ID i Clr store 1 gt EDIT lt hotkey F1 push button This button opens the SPAN FIN LoJack ID editing sub page 2 gt ID only indica
24. d if this sensor is interfered by strong turbulences The direction finder antenna unit acts as a sensor for electromagnetic waves In the near field of this antenna unit any conductive e g metallic obstacle will influence the incoming wave field and create reflections which decrease the bearing accuracy These are general physical limitations concerning all types of direction finder systems To achieve the best bearing results it should be considered that the antenna unit is installed as far away as possible from any other vertically polarized conductive structure If possible there should be no reflectors within an area of 2 3 feet around the antenna unit In this worst case example the direction finder will not work properly is aam aat P In this example the antenna unit is located too close to the cable cutter of the helicopter This cutter will produce strong reflections especially as the length is equal to Lambda 4 within the VHF airband 27 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 Examples of properly installed direction finder antenna units 28 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 4 2 Display unit The display unit may be mounted into a front panel by the means of this mounting drawing Mounting hole pattern for the display 4 3 Cable Connection Wiring Also refer to chapter Tec
25. ght NVG ene mode Maximum brightness ca 4 of day default mode brightness dimming optional Input Impedance gt 50 kQ Audio LF AC coupled voltage source with very low inner resistance Maximum output voltage ca 8 Vpp 2 83V rms at maximum Volume Maximum output power ca 2 W with 40 speaker Audio output signal If a headphone is connected 32 600 Q 100mW we recommend using a resistor 18 Q 0 25 W between audio output and headphone to prevent damage of the headphone Serial interface RS232 9600 baud 8 data bits 1 stop bit no parity TXD Serial output ca 10 V RXD Serial input ca 10 V zo User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 5 3 Mechanical features Temperature range Display e permissible operating temperature e permissible storage temperature Antenna 3 e permissible operating temperature e permissible storage temperature Protective system e bearing antenna Weights e display unit e bearing antenna Dimensions e display unit e bearing antenna 20 C 60 C 30 C 80 C 40 C 60 C 55 C 80 C IP 67 250 g 2000 g 82 mm x 82 mm x 43 mm width x height x depth 2270 mm x 185 mm Drawing of Display 1 For temperatures lower than 10 C a warm up period of 15 min should be allowed 292 User manual Installation and Operation of Direction Finder Sy
26. here is a very weak signal in the noise this signal will produce a correct bearing indication thanks to sophisticated bearing technologies used in the RT 600 system Fluctuations due to noise will be small even at low signal levels however the reaction time of the bearing indication can increase To verify if a bearing indication is due to white noise or due to an internal disturbance source respectively or if it is due to a real receive signal the aircraft should make a slow turn If the bearing indication is due to an external signal e g a SAR beacon the bearing indication has to compensate the changed relative flight angle Example Bearing indication is 30 The signal is weakly audible in the loudspeaker due to being deep in the noise The airplane makes a turn left by 60 If the bearing indication is not changing to approximately 30 60 90 after a few seconds the bearing is likely to be due to noise or internal disturbances off the aircraft Note The weaker a signal is the longer it will take to change the bearing Durations around 5 seconds are not unfamiliar in such cases Therefore it is not useful to use this procedure for signals with short transmission times and low transmit duty cycles such as COSPAS SARSAT transmission The procedure is best suited for ELT transmission with a continuous signal and still well suited for ELTs with intermittent transmission down to 33 In cases where pulsed signals are to be received
27. hnical data for details optional connection Head Phone a Impedance 32 64 Ohm a D e Na Pauera 1808mu Speaker o eu with resistor for pouer adaptation gt 1 C m N LM 3i TU T D m Sd Tien l E 3 2 y Y S xj S eA A A l l 2 e Q0 90 g gs Cd i 2 3 zo amp 8 e e 9 9 o i y E Th a g ai gl lu IG M m TXD C NUG D 2 oe p r3 FUSE 1A lt slow r3 EL 12u 30U DC d f O 3 O Ground e X O a 2 f C O O Je gt VU C i as ri U rau aou 7 Q Ui C GND Ta S L 5 O x cable shield connected to GND connector shield 9 pol Sub D plug female male 6 pol Amphenol plug female PTG06SE10 6S SQ max length of cable ca 10 20 m Connecting cable wiring 29 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 5 Technical data 5 1 Electric features Method of bearing Doppler principle 3 kHz rotational frequency right left rotation Bearing accuracy 5 Internal resolution q Sensitivity RF Voltage at Receiver Input 50 Q VHF lt 100 nV Maritime Band lt 100 nV UHF lt 100 nV 406 MHz lt 150 nV LoJack lt 100 nV ETS lt 200 nV Med Track lt 200 nV Frequency stability 2 0 ppm Af f 2 10 at Temperature range 30 C 80 C Receiving channels 15 18 five of them are free adjustable Receiving frequencies S
28. itch back to the LoJack bearing window If an ID has been selected successfully the LoJack bearing window indicates the selected Lojack ID and the ID only mode In this case the squelch is controlled by the antenna unit without possibility of user influence indicated by an X ahead the squelch level marker The direction finder will calculate bearing information only while he receives a transmission with the selected ID thus the squelch is not necessary and only would reduce system sensitivity Clr Store i A y 1 gt ID lt menu option showing the currently selected ID and K FIN FIN ID editing sub page allowing by pressing the F1 push button to re enter the 2 gt ID only lt menu option showing that currently the ID only only mode may be deactivated ID Only Mode Menu with defined ID 19 mode is active By pressing the F2 push button the ID User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 3 2 ETS Pages The Law Enforcement version of the RT 600 system is supporting the tracking of ETS transmitters If an ETS frequency has been selected the bearing window for ETS opens lts operational use is similar to the standard bearing window 2 3 3 Med Track Pages Med Track patient tracking allows to track persons wearing a small transmitter helping to recover them e g in cases of disorientation or unconsciousness If a medical tracking frequen
29. ive main page before having been switched off that means either the DF Direction Finder or the MEM Memory page User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 1 2 Main Pages Selection There are two main pages which can be selected The DF Direction Finder Page is the page in which all relevant operational information is shown depending on the kind of signal which shall be received The MEM Memory Page is the page in which memorized operational frequencies can be modified 1 The gt Page lt rotary switch is used to select the active page 2 The active page is highlighted with dark background 3 The inactive page which may be selected is written in dark letters on bright background Page Selection 2 1 3 Dimming function The background of the LC graphic display is equipped with a LED array whose brightness may be adjusted continuously from 5 to 100 Dimming will be performed in an exponential curve thus allowing very accurate adjusting under night conditions 1 Pressing the gt Rep DIM lt button for a short time is activating the dimming setup mode 2 Brightness information as percentage value from 5 to 100 in steps of 5 is displayed instead of the Page field in the upper right 1 corner of the display Rep Soni Pac 3 The gt Page lt rotary switch can be used to adjust the display brightness Right hand turn will increase the v
30. matically Refer to the chapter Frequency Selection Page If the frequency is changed by one valid datastream no more serial input is necessary The actual frequency can be changed at any time by manual operation at the DCU The timing of serial input if used is strictly fixed The optional serial input has to take place directly after a serial output max 50 ms delay time If a new changed frequency is commanded to the DCU via this serial input interface it can take up to 1 sec of time until this new frequency is ready for operation bearing It is strictly not recommended to use the frequency remote control for any scan mode The frequency control has to be used for static frequency change only Register of databytes Header 0xC0 1 Number of bytes in the complete message including header and checksumbyte 25 53 not used for normal operation any byte values allowed 4 Volume 0 100 Frequency Hz frequency is rounded to the according grid automatically Valid Range for Standard Version Valid Range for LE Version 118000000 123000000 Hz 8 333 kHz 118 1230000 Hz 164 1740000 Hz 156050000 162025000 Hz 5 000 kHz 201 a 215995 240000000 246000000 Hz 8 333 kHz NE 218995 219 220000 400000000 410000000 Hz 8 333 kHz 40000 41000000 9 Squelchlevel Manual 0 60 Autosgl
31. menu on the display below User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 8 gt Rep DIM Push Button If pushed for a short time this button activates the setup of the display dimming function If pushed for a longer time ca 3 seconds this button activates the repetition of the last valid bearing and signal level information 9 Page Rotary Switch to select displayed main pages DF or MEM Together with the DIM button it is used to set the display brightness dimming function 10 gt Frequency lt Rotary Switch to select frequencies 2 1 1 Power On procedure After switching on the unit through the ON OFF Push Button a start screen is shown on the LC Display for five seconds 3 01 poera oca ni 00848 HU TUN Direction Finder RHOTHETA a lo nd ON OFF RT 600 7 Power On Screen 1 The upper line is showing the name of the product RT 600 SAR DF 517 2 The second line is showing the sub version of the equipment that means either LE Version for the Law Enforcement version or Standard Version for the standard version 3 The fourth line is showing the web address of the manufacturer RHOTHETA Elektronik GmbH 4 The lowest line displays software version and serial number information for the antenna unit and 5 for the display control unit After five seconds the equipment switches into the operational mode by displaying the last act
32. ng the F1 push button above the menu option 3 gt gt 121 500 lt menu option The COSPAS SARSAT signal in the 406 MHz band is transmitted only every 50 seconds in form of a short data burst of 440 or 520 ms Approaching the transmitter it will be received earlier than the 121 500 MHz continuous signal due to its high transmitter power However in a lower distance to a transmitter bearing on 121 500 MHz is faster thanks to the continuous or rapidly intermittent signal The 121 500 MHz menu option allows a direct switch over to 121 500 MHz Direct return back from 121 500 to the COSPAS SARSAT band is possible from the 121 500 MHz bearing Window in COSPAS SARSAT mode Please refer to the chapter 121 500 MHz bearing Window in COSPAS SARSAT mode for details 4 gt Frequency range lt indication COSPAS SARSAT is using a channel spacing of 3 kHz for its beacons Due to the internal architecture of the direction finder it is possible to receive more than one channel in the same time Thus frequency steps of the direction finder are 8 33 kHz instead of 3 kHz The receive frequency covered by the current receive frequency setting is shown in the display line above the receive frequency indication Important If the exact frequency of the COSPAS SARSAT beacon is unknown it is strongly recommended to use the COSPAS SARSAT scanning functionality for detecting the correct frequency Refer to the chapter Frequency selection Page amp COSPA
33. on Finder System Rhotheta RT 600 SAR DF 517 1 2 Scope of delivery e Display Control Unit e Antenna Unit with Receiver and DF controller e Connector set for cable antenna lt display and power supply n AU Antenna Unit DCU Display Sontrol Unit 1 3 Important basic adjustments In order to achieve best use of the direction finder the user is able to perform several adjustments of configuration These adjustments can be set up in the setup menu refer to chapter Operating Setup Page The most important adjustments are e Mounting position adjustment of downside or upside mounting e External remote dimming of display Important If using the external legends dimming the limits of the external analog voltage min max have to be adjusted correctly in the direction finder setup menu For a description of these adjustments please refer to chapter Operating Setup Page User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 Operating Operating the direction finder is deliberately very simple with its clearly arranged layout Except the upper page rotary switch and the ON OFF pushbutton the function of the operating elements always depends on the active page All relevant adjustments can be controlled on the display Figure 1 shows the general layout of the control unit s surface 2 1 General Operating Principles o m TE Es t Cir S
34. otocol data bytes out of valid range DATARNG data DCU AU Error 0 Antenna Unit Receiver board defective NO REC receiver 25 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 4 Installation 4 1 Antenna unit A convenient position of the monopole bearing antenna is crucial for good bearing results The antenna needs an effective ground connection to the body of the aircraft or to the roof of the vehicle If there is no metallic mounting surface available a metallic sheet or similar net with connection to ground has to be applied first between vehicle body and antenna In this hatched area the antenna touches the body of the vehicle aircraft In order to obtain a good ground 8 x holes for mounting the connection the surface of the body should be bared antenna unit to the Measuring unit mm vehicle aircraft BERR EK We deus Mounting drawing of the antenna 26 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 4 1 1 Influence of the antenna unit location and the environment on the bearing accuracy Recommendations concerning the practical antenna unit location on helicopters and airplanes The bearing accuracy of the direction finder antenna unit is severely influenced comparable to an airspeed sensor by the environment For comparison a perfect high quality speed sensor will not indicate the true airspee
35. repetition cycle Display in COSPAS SARSAT Scan Mode 1 gt SCAN lt flashing indication notifying the user that the equipment is operating in scan mode 2 Frequency display indicating the COSPAS SARSAT scanning frequency range 3 gt X lt sign showing that squelch settings are controlled autonomously by the receiver Scan mode can be left by entering a new frequency through the frequency or memory setup 16 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 2 7 Marine Ship Scan Mode This chapter only applies for the standard version of the RT 600 SAR DF 517 If the Marine Ship scan mode has been selected marine channels 1 to 88 156 025 to 157 450 MHz are scanned including frequencies in between After reception of a valid signal the bearing mode is activated The frequency of latest signal that has been found using the scan mode is automatically transferred to the AUX memory channel Scan mode can be left by entering a new frequency through the frequency or memory setup In order to prevent the scan to stop on noise signals it is recommended to start scanning operation with high squelch settings Reduce the squelch level in steps until the scan stops on an invalid signal for the first time Then increase the squelch level only slightly This will result in the highest possible scan sensitivity without reacting on noise source e g resulting from disturbances generate
36. rer of the Direction Finder System RT 600 In the United States of America the system is marketed under the system designation SAR DF 517 1 1 Purpose of use of the direction finder This modern precision direction finder was mainly developed for professional SAR search and rescue and LE Law Enforcement purposes There are existing two versions e The standard version which offers the possibility to bear and analyze either traditional emergency frequencies in the UHF and VHF band the general distress calling channel 16 of maritime radio and the common COSPAS SARSAT emergency signal e he Law Enforcement version which offers the possibility to bear the traditional VHF emergency frequency the common COSPAS SARSAT emergency signal and different LE signals LoJack ETS and Med track The complete COSPAS SARSAT Frequency range also future channels is supported by this direction finder For practical use there is also a very fast scanning mode for detecting any possible COSPAS SARSAT frequency within one pulse period lt 400 ms available The excellent bearing results becomes possible due to our newly developed patented antenna concept small robust and wide banded and the sophisticated bearing analyzing algorithms which deliver a quick but nevertheless steady display The direction finder was developed to be used under rough conditions such as mobile use on aircrafts or vehicles User manual Installation and Operation of Directi
37. ribed in this section should be used by trained personal only E t Cir Store Rep s 99 SAN SN SDM de Accessing Setup Page The setup page can be accessed by holding down the gt CLR lt 1 and gt REP lt 2 buttons simultaneously and in the same time performing a left hand turn on the gt Page lt rotary switch 3 293 1 2 3 4 5 6 7 8 9 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 a d O t Rep SDMA Fe SODA ER m w Pirection Finder RHOTHETA x ON OFF RT 600 I NI EP Setup Page gt Store lt push button must be pressed in parallel if a value of a setting shall be modified If a value can be modified the background stops to blink gt Select lt rotary switch used to scroll through the menu options The value of the actually activated menu option is high lighted with dark background and blinking gt Value lt rotary switch used to change values in menu options gt Store lt 1 has to be pressed in parallel if a value shall be modified gt SN Ratio lt menu option representing the necessary Signal To Noise Ratio Difference between signal and noise level used as criterion for the automatic squelch function Please refer to the chapter Squelch Operation for details Default value is 6 0 dB gt Mounting Position lt menu option to select Top or Bottom Mounting of the DF antenna
38. stem Rhotheta RT 600 SAR DF 517 E 5 D Eq ET NENNEN AA y A TT A S Lad A XA C2 0173 07 f T Y 7LVIZZZZZZZZZZZZZZZZZ ZO gt WIZZZZZZZZZZZZZZZZ ZA NZ A a U etel A Drawing bearing antenna 33 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 6 Appendix 6 1 Frequencies of channels on maritime band only for standard version Frequency range of the RT 600 in the maritime band 156 000 MHz 162 025 MHz Channel No frequency ship station Frequency coast station 1 156 050 MHz 160 650 MHz 2 156 100 MHz 160 700 MHz 3 156 150 MHz 160 750 MHz 4 156 200 MHz 160 800 MHz 5 156 250 MHz 160 850 MHz 6 156 300 MHz 160 900 MHz 7 156 350 MHz 160 950 MHz 8 156 400 MHz 9 156 450 MHz 10 156 500 MHz 11 156 550 MHz 12 156 600 MHz 13 156 650 MHz 14 156 700 MHz 15 156 750 MHz 16 156 800 MHz 17 156 850 MHz 18 156 900 MHz 161 500 MHz 19 156 950 MHz 161 550 MHz 20 157 000 MHz 161 600 MHz 21 157 050 MHz 161 650 MHz 22 157 100 MHz 161 700 MHz 157 150 MHz 161 750 MHz 157 200 MHz 157 250 MHz 161 800 MHz 161 850 MHz 157 300 MHz 161 900 MHz 157 350 MHz 161 950 MHz 157 400 MHz 156 025 MHz 162 000 MHz 160 625 MHz 156 075 MHz 160 675 MHz 156 125 MHz 156 175 MHz 160 725 MHz 160 775 MHz 156 225 MHz 160 825 MHz 156 275 MHz 160
39. t of receiving datastream gt one byte length Register of databytes for details see next page byte no Header 0xA0 Id for Bearing Mode Number of bytes in the complete message including header and checksumbyte Status HSB x x IxI x xIx x x LSB Receiving Squelch controlled by AU X Permission RL Calibration Line Night Line NVG Dimming External Autosquelch Active O Standard Version 1 LE Version 3 Not used 4 5 Error Bits 12 0 8 11 Frequency 14 Audio Line amp NF Test Output 15 Not used 16 17 Voltage DCU 0 335 3355 18 19 Voltage AU 0 255 0 25 5 V 20 Temperature AU 68 127 C 21 Frequency Offset 99 99 Service Test values mode dependent test values for service only Not used reserved 27 Level 0 100 28 29 Bearing Averaged 0 359 relati 30 31 Bearing Live Min 0 359 relati 32 33 Bearing Live Max 0 359 relati Test Value PS RAM Right Rotation 0 178 for service onl 35 Test Value PS RAM Left Rotation 178 for service onl Not used reserved 38 Checksum is the 2 s complement of the modulo 256 sum of all bytes without checksum byte 0 n 35 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 Detailed Description of important values for practical use e Status byte 2 Receiving Bit O of this value LSB indic
40. tandard Version Law Enforcement Version or see type plate for 118 000 123 000 MHz 118 000 123 000 MHz special customer 156 000 162 025 MHz 164 000 174 000 MHz options 240 000 246 000 MHz 201 000 220 000 MHz 400 000 410 000 MHz 400 000 410 000 MHz Special Scanning LE version automatic scanning for LoJack and ETS signals modes Standard version complete maritime ship band scanning within 3 sec COSPAS SARSAT Channel A S 406 022 406 076 MHz Frequencies COSPAS SARSAT Full automatic detection of any active COSPAS SARSAT channel A S within fast scan mode 400 msec COSPAS SARSAT Reception and analysis decoding of COSPAS SARSAT data signals 112 Bit analysis short message resp 144 Bit long message 400 baud biphase L encoded phase modulation with Bose Chaudhuri Hocquenghem error correcting code specified in accordance to COSPAS SARSAT C S T 001 October 1999 Bearable kinds of A3E F3E A2X ELT modulation FTD G2D COSPAS SARSAT modulation bearing largely independent of modulation Polarization Vertical Error of polarization lt 5 at 60 field vector rotation Garbling cone Ca 30 to the vertical Time of response lt 20 ms with sufficient receiving field strength LC graphic display 128 x 64 dots supertwist transflective extended range of temperature dark blue display on yellow green background background light Freely adjustable exponential dimming of
41. th the highest priority will be displayed Reason Error 12 Main voltage supply Main Voltage input too low x 10 0 V VOLT DU Connection No serial data RS485 from Antenna Unit No or damaged Error 11 E antenna gt display connection between antenna and display or damaged antenna unit NO AU or Antenna Unit Error 10 Connection Incompatibility or bad data connection between display and antenna BAD AU antenna display Error 9 Remote Unit Incompatibility or bad data connection between display and external BAD RU serial Remote Unit or PC Antenna Unit Voltage supply at Antenna Unit too low x 9 0 V Main voltage Error 8 supply too low or considerable drop of voltage between display and VOLT AU antenna Error 7 Connection Incompatibility or bad data connection between antenna and display BAD DCU Display gt Antenna Error 6 Connection No serial data from Display Unit to Antenna Unit NO DCU Display gt Antenna Error 5 antenna Error in synthesizer oscillator of receiver in Antenna Unit PLL ERR Error 4 received transmitter Received frequency too high more than 6 KHz error of transmitter FRQ OFS Error 3 received transmitter received frequency too low more than 6 KHZ error of transmitter FRQ OFS Error 2 radio distance Data Bits of decoded signal COSPAS SARSAT or LoJack DECODE transmitter lt gt DF defective Error 1 Incompatibility of Pr
42. tion The field indicated that the receiver is operating in the filter mode By pressing the F2 button ID only mode can be left EDIT TASIM ONLY ID Only Mode Menu Options The ID may be entered through the editing sub page in several ways 18 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 i OS e e km M p T TETE T d b E pe sdisizis un bal El EA ME unLUE TT EI Ow TM Direction Finder RHOTHETA Y x a c i al X E ON OFF RT 600 ID Editing Sub Page 1 gt VALUE lt Data field showing the last received LoJack ID of any active VLU within receive range In case that no LoJack ID has been received the value field is filled with dashes 7 2 Value to ID hotkey F2 push button allows to copy the received LoJack ID in the ID field 3 gt ID lt field showing the LoJack ID which shall be selected If no LoJack ID has been selected the ID field is filled with dashes Manual entry of data is possible The position of the ID field which can be modified manually is high lighted by dark background and bright values 4 gt Select lt rotary switch allowing to select which position of the ID field shall be modified manually 5 gt Value lt rotary switch allowing to modify the currently selected position within the ID field 6 gt Exit lt hotkey F1 push button allowing to sw
43. tore Rep 4 j E E AN AN abi Sen e 9 Direction Finder RHOTHETA P ONIOFF Fro Control Unit Overview 1 gt LC Graphic Display lt 128 x 64 dots dot matrix display dark blue on yellow green background showing all relevant operational information depending upon the selected page 2 gt Menu lt options for rotary and push buttons If a field with dark background and bright text is shown below a button or switch the function described in this field may be selected through the operational element above or below this menu field In case of the Page Menu the active page is high lighted with dark background while the inactive page is in black letters 3 gt ON OFF lt Push button to switch on off the system 4 gt Volume lt Rotary Switch used depending on the active page to adjust the volume of the audio output or to select frequency values MHz steps 5 gt SQL lt Rotary Switch used depending on the active page to adjust the squelch function or to select specific functions on a page depending upon the interactive menu on the display 6 gt CLR F1 Push button If pushed for a short time this button activates the function F1 described in the interactive menu on the display below If pushed for a longer time ca 3 seconds this button activates the CLEAR function 7 gt STORE F2 Push Button If pushed for a short time this button activates the function F2 described in the interactive
44. tters on dark background below the SQL rotary switch and as an arrow beside the signal Strength Bar Graph 4 The gt CLR lt Push button is used for erasing the internal bearing value averaging store and the Last Signal Timer To activate this function the push button has to be hold down for a minimum of circa three seconds The sophisticated averaging store increases bearing precision and enables at all an usable bearing display in case of bad receiving signals if there is a far away transmitter and or temporary complete loss of a receiving signal Caused by the averaging procedure a drag error may occur which 12 5 6 7 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 might be disturbing the bearing indication after a quick change of course of the aircraft or vehicle In this case the indicated bearing value lags by the real bearing value for about two seconds for very weak signals even longer By pressing this push button after a quick change of course the display will show the new bearing value without drag error Additionally the CLR Push Button is used to activate specific functions high lighted in the menu below the button gt STORE lt push button Without function except if a special function is high lighted in the menu line of the display gt REPEAT lt Push button when pressed showing the last valid bearing value with corresponding receiving level gt PAG
45. ty of the data message gt X lt sign to indicate that the Squelch is controlled by the antenna unit for optimum sensitivity The user has no access to the Squelch setting 15 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 2 5 121 500 MHz bearing Window in COSPAS SARSAT mode While being in the 121 500 MHz bearing window activated through the COSPAS SARSAT Bearing Mode sub page the bearing window is slightly different to the normal bearing window Differences are 1 406 xxx push button F2 button allows to switch back to the last used 406 MHz frequency This elie 2 allows to quickly check on 121 500 MHz if a beacon can already be received on VHF and in the case that this is not possible to cycle back to 406 MHz quickly cr censor M 2 gt CP SAR SAT lt indication shows that the actual page belongs to the COSPAS SARSAT page X2 section 121 500 MHz Bearing Window in COSPAS SARSAT Mode ES 2 2 6 COSPAS SARSAT Scan Mode If the COSPAS SARSAT scan mode has been selected the COSPAS SARSAT channels as selectable manually from the Frequency Selection Page are scanned After reception of a valid COSPAS SARSAT Signal the COSPAS SARSAT bearing mode is activated Due to the fast scanning the complete COSPAS SARSAT sub band is scanned within less than 400 ms detection of a receivable COSPAS SARSAT signal is possible within one COSPAS SARSAT
46. uelch level is set automatically an A above the marker indicates the Autosquelch functionality gt Last Signal timer showing the time since a signal has been received for the last time i e since a signal has been stronger than the squelch level Values are minutes seconds 213 User manual Installation and Operation of Direction Finder System Rhotheta RT 600 SAR DF 517 2 2 3 Special Options in COSPAS SARSAT Bearing mode Especially for the use together with beacons transmitting a data signal according to COSPAS SARSAT specifications in the 406 MHz Band special functionalities and pages are being provided After selection of a COSPAS SARSAT Frequency Refer to the chapter Frequency selection Page the bearing page provides additional information and operating options Cir Store z un FAN FN uma Ses DECODE gt 121 500 a j d Operational Elements and Display in COSPAS SARSAT Bearing Mode 1 gt Auto Squelch lt indication indicating that the squelch level is set automatically to be close to the noise floor It is recommended to always use the Auto Squelch during COSPAS SARSAT operation This can be achieved by manually selecting O lowest possible value or 60 highest possible value as squelch level During COSPAS SARSAT Operation this will force the automatic setting of the level 2 gt Decode lt menu option allows to open the COSPAS SARSAT Decode sub page by shortly pushi
Download Pdf Manuals
Related Search