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USER MANUAL - Agecodagis SARL

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1. 7 2 2 DATING AND TIME RECEPTION The recorder has an internal oscillator form which is obtained the internal clock and the sampling frequency Its stability is of the order of 5 10 7 The internal time is managed with a 1 ms resolution The internal clock is set on time by the RS232 link Set on time command The internal time is replaced by the time received through the command at the time of the reception of the first time pulse following the complete reception of the command The effective time setting is realized whatever the length of the time pulse may be AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 36 From now on the recorder counts the successive time pulses and checks in the length of a pulse on N where N can be parametrized N must represent the number of time pulses received in a minute It is therefore important to send the Set on time command just before receiving a time pulse carrying the quality information of time reception N can take any value except zero The most interesting values are N 1 for a receiver providing only minute pulses N 60 for a receiver providing only second pulses N 59 for a receiver providing second pulses but from which one pulse per minute is masked Time pulses from the external reference should have a proper length to be accepted for synchronizing the internal clock It is possible that
2. 7 2 3 1 7 FILLING FRAMES These frames do not carry informations but can be found in the data SO S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 SYN Bi FF SYN synchro frame b3 0 b210 bits indicators type of frame 111 Stuffed frame b7654 bits synchro reversed in comparison to the synchro frame of the previous frame A or 5 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 52 7 2 3 1 8 FRAME SUCCESSION The time frames are sent out one time each N primary samples frames The first frame transmitted after switching ON is a time frame The INFORMATION frames are sent out each 8 TIME frames The offset frames are transmitted every 256 time frames The periodicity of the INFORMATION and OFFSET frames is as follows 31 25 Hz 62 5 Hz 125 Hz 250 Hz INFOS 32 secs 16secs 8 secs 4 secs OFFSET 17 Mns 8Mns 4Mns 2 Mns All these informations are prone to be modified The software developed by the user should not take it into account superframes succession only samples super frames samples inform samples offsets etc TIME FRAMES samples frames n n 1 n 2 n3 n 15 offsets informations Time frames AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 53 Relative position of frames in a super frame is not important
3. 250 0 5 DAT DRIVE recording length The filling rate of the tape is directly linked to the recording time for a given sampling frequency The filling rate indicated by TCS and SEETITAN is calculated according to a 2 Gb capacity AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 13 However abnormal use of the tape can reduce its storage capacity This may result from the fact that the DAT DRIVE repeats the writing of defective blocks It is therefore important not to reach 100 filling if one wants to avoid the data losses VERY IMPORTANT NEVER TURN OFF THE RECORDER DURING THE WRITING PROCEDURE ON THE DAT TAPE THE TAPE CAN BE DAMAGED AND BECOME UNUSABLE AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 14 2 3 TRIGGER ALGORITHM A STA LTA algorithm always tags the data when a STA LTA trigger event occures The STA LTA algorithm is applied to the vertical channel of each of the triplets The STA LTA algorithm has the following parameters Time constant for LTA Time constant for STA Triggering threshold These parameters are introduced into the recorder by the TCS configuration software The STA LTA algorithm is present in all TITAN recorders but its function depends on the product CONTINUOUS RECORD It generates a data flow including t
4. 8 IN CASE OF PROBLEMS THE TAPE IS NOT EJECTED BY THE NORMAL EJECTION PROCEDURE even after pressing on the ejection button The DAT drive has a problem with this tape which prevents its ejection Mechanical problem After having launched the ejection procedure the DAT drive stays on Try an ejection by pressing the DAT DRIVE ejection button If the tape is ejected continue in sequence the tape replacement procedure If it is not ejected try to help the tape ejection by pushing the DAT DRIVE door and by CAREFULLY trying to lift the back of the tape up with a finger This procedure is an urgent one Do not repeat it Proceed if possible to a cleaning of the DAT heads If the problem happens with a new tape it means that the problem comes from the DAT drive and that the recorder must be sent for repair THE ACCESS TO THE TAPE TAKES A VERY LONG TIME WITH LOTS OF TURNING ON OFF OF THE DAT DRIVE When the DAT DRIVE is turned on for a flush for example the recorder tests the proper initial loading of the tape This loading can sometime fail The recorder then turns the DAT drive off and turns it on again to provoke a new loading If the recorder does not correctly charge the band in 3 minutes the dumping is abandoned The problem is signaled to the user under TCS Infos window by loading problem The tape may be damaged Replace the tape Clean the DAT heads If the problem persists the recorder must be sent for repair
5. Only 13 and 12 ones are today assigned Triplet 12 Used to encode up to 16 auxilliary 1 component channels When triplet number is 12 Fech and rate signification is modified as follows AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 40 Fs b7654 d12 b3 0 b210 Auxilliary pair of channel number we speak about 0 7 Rate same as 0 7 triplet sample frame except compression ratio is always 0 Auxilliary channel are grouped 2 channels in a frame Data are located and absolutely encoded as 16 bits on 24 on the two first locations as follows XXxYYy000 XXx are the 16 bits of the sampled data for the channel b210 sign extended to 24 bits YYy are the 16 bits of the sampled data for the channel b210 8 sign extended to 24 bits No sampling frequency is defined for these channels One sample is read every time frame Triplet 13 Triplet 13 is reserved for special purposes When triplet number is 13 Fech and rate signification is modified as follows Fs b7654 d13 b3210 Triplet we speak about Rate b7654 unchanged b3210 0 1 or 2 type of informations Depending on type of information carried information is as follows O The first 6 bytes indicate the max LTA value for the whole time ellapse since the last time frame for the indicated triplet Encoded with 48 bits 1 the same for STA exepted byte 7 0 AGECODA
6. Ex TELECODE good reception pulse length bad reception pulse length 250 ms 500 ms AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 71 gt take as correct pulse length 300 ms The length is encoded in a 16 bits integer msb in the first place Test selection b0 0 correct pulses if length inferior to correct pulse length a correct pulses if length superior to correct pulse length b7654321 unused 0 Nb of time pulses minute 8 bits integer Time out definition 8 bits integer bO 0 time setting true command Regular value Time will be set on next RX pulse 1 No time setting occurs The Hour is set in the station to be loaded as internal time 60 seconds if a time out to external top reception occurs time out length is 60 seconds This command has to be sent as close as possible of the true time setting command The transmitted hour has to be the current one This command is taken into account by the recorder right after its reception Cf DATING paragraph above Note when read in infos frames when the unused byte is 1 then the encodede date is the date of the last reboot of the station After a time setting of the station this byte indicates the last time setting and this byte is 0 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14
7. Input Impedance 25K Cs5323 Lsb 843 nV Input Impedance 25K Ad7710 Lsb 298 nV Input Impedance 25K Hi7190 Lsb 729 nV Input Impedance 25K DIGITIZER and DAT DRIVE lt 2 5 Watts MINITITAN 700 mW 9 18 Volts 38400 5 10 7 DIGITIZER AND DAT DRIVE 4 Kg 260 190 150 MINITITAN TBD IP65 7 2 DETAILED TECHNICAL SPECIFICATIONS The specifications of the TITAN recorders are described in the following paragraphs AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 34 Sensor interface Dating and time receiver RS232 link Media Data format Pinout AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 35 7 2 1 SENSOR INTERFACE I The sensor interface depends on the type of digitizer Crystal A D The recorder has the sensor differencial inputs referenced to the minus pole of the supplying system The characteristics of the input are the following Input impedance 25 Kohms Max amplitude 5 V Gain with ADC 1 fixed No highpass filter Analog Device A D The recorder has the sensor differencial inputs referenced to the minus pole of the supplying system The characteristics of the input are the following Input impedance very large Max amplitude 0 5 V Gain with ADC 1 2 4 80r16 No highpass filter
8. The only important thing is the succession sequence of frames related to the same triplet number 7 2 3 2 INPUT LINK This link is composed of fixed size messages 12 bytes The content of the message corresponds to the following list of parameters COMMAND 1byte data bytes 10 bytes chksum 1 bytes The COMMAND byte defines the type of the 10 data bytes 7 2 3 2 1 SENDING OF A COMMAND The sending of a command is done as follows Before sending a command the transmitter must be sure that the CTS signal is not in action The transmitter activates the RTS signal It waits for the CTS signal to become active The command transmitter must then turn down the RTS signal down and send the command bytes to the chksum The CTS signal becomes inactive after the reception of the chksum and the end of the possible execution of the command thus indicating that the recorder is available to receive a new command The reception of the chksum by the recorder is followed by Checking of the chksum Taking into account the command if the chksum is correct The chksum must be equal to the Boolean sum of the 11 first bytes of the command OR EXCLUSIVE with the bit of most significant word forced to 1 The advised dialogue procedure is the following Test inactive CTS Activate the RTS Wait for the CTS activation Deactivate RTS AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 8
9. which the index has been generated index type Signification of other bytes depends on this byte 0 true index b4 Channel number that triggered bit 7 release lt 504 always 0 release gt 504 and mode trigger to disk 1 b5 0 b6 b7 0 b8 11 End Address when triggered record 0 if continuous b8 flash memory cycle number b9 11 physical address in flash memory b12 b15 Begin Address where index is pointing to Continuous Absolute address in file 0 2Go Lsb first And if triggered b12 flash memory cycle number b13 15 physical address in flash memory b16 b31 0 if continuous record if trigerred b16 0 byte 17 19 spare 0 bytes 20 22 record duration sec bytes 23 25 Max value reach on channel 0 counts bytes 26 28 Max value reach on channel 1 counts bytes 29 31 Max value reach on channel 2 counts 1 Dummy index AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 80 b4 0 b5 1 b6 b7 0 b8 11 0 b12 b15 Address where index is pointing to b16 b31 0 2 Log file index b4 0 b5 2 b6 b31 0 3 RX Time measurement index b4 0 b5 3 b6 b17 Last time frame with new pulse measurement 12 bytes see time frame paragraph b18 31 0 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 81 ON DAT TAPE Th
10. 0 and 31 Infomation bytes li FRAMES 0 to 15 last received i command Frames initialized at 0 when ON is press The first byte of the command is placed in NUM shift of the previous bytes towards the first byte Rem about frame 15 The bO bit of the time out byte when 1 indicates that the frame gives the last reboot time When this bit is 0 it gives the last time set Refer to TIME SET COMMAND FRAME 16 ASCII Owner bytes 10 to 18 of the frame Number 0 255 coded in binary on byte 19 FRAME 17 Software version ASCII bytes 10 to 19 of the frame FRAME 18 10 11 msb first number of detections When 12345 FFFF it means unknown 12 3 4 5 msb first number of Media DRIVE bytes Nb bytes 12345 32768 When 12345 007FFFFF it means unknown 16 Battery voltage Vbat 16 20 163 256 volts 17 8 Msb first number of lost dumpings due to low bat tension 19 unused null FRAME 19 10 11 msb first number of failed Media DRIVE Flushs 12 number of cycles written in Flash when trigger mode 0 if not 13 14 15 msb first number of bytes in the Flash 16 State of flush process Not Running Loading Tape Going to EOT Writing DATA Rewinding Tape Writing index Unloading Tape O O1 BR D AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 47 other Reserved 17 Triggered event record in process when 1 18 Indicator of DAT Problem
11. 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 6 The spreadsheet below describes the operating composition of the different products DIGIT 6 DIGIT 3 TITAN ATLAS MINITITAN channels channels DAT LIGHT NB 6 3 3 3 3 channels Type A D Crys Crys O Crys O Crys 1 A D Auxilliary no no no no no 16 16 bits Dating simple simple O simple O simple 0 corrected Time keeper with with with with with Record cont cont cont trig trig Flash 0 Mb 0 Mb 8 Mb 8 Mb 8 Mb Soring no cycle cycle cycle Media Without Without DAT Without Without Paral Link without without without with with MINITITAN DIGIT 6 3XT Geos NB 3 6 channels Type A D Crys Crys Auxilliary no 2 HI7188 16 16 bits Dating simple simple Time keeper with with Rec Type mediatrig cont Flash 8 Mb 0 Mb Soring no cycle M dia HD Without Paral Link with without Configuration spreadsheet of the TITAN set MINITITAN3 can generate a 1 component data stream if wanted Informations describing the configuration of a recorder are hept in the data Cf paragraph FRAME INFORMATIONS AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 7 2 1 1 SAMPLING SEISMOLOGICALS CHANNELS Two types of converters are used Both converters are of the sigma delta high dynamic type However the Analog Device models do not have a flat answer in the band pass This inconvenience must be c
12. 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 63 7 2 3 3 5 WIDENER COMMAND COMMAND 4 Widener coefficients Command enabling to transmit the widener filter coefficients Information Reserved Factory Contact AGECODAGIS to get more informations 7 2 3 3 6 TRIGGER and GAIN COMMAND Implemented only if Recording type is triggered COMMAND 5 Definition of the durations of pre and post event in the case of a triggered recordings COMMAND 5 1 byte Duration of the pre event 2 bytes Duration of the time out 2 bytes Gain 1 byte End duration 2 bytes Cycles 1 byte STA LTAO or LTA LTAO 1 byte unused 1 byte chksum 1 byte Every duration Msb First duration in seconds Gain 2 gain byte Gain 1 128 Gain not applicable except for Analog Devices AD Look at TRIGGER ALGORITHM paragraph for pre event duration limitations Cycles B0 0 Flash will point to beginning if end reached Flash cycles are managed B0 1 Records stop when flash end is reached B1 7 unused Must be set to 0 STA or LTA LTAO B0 0 Sta Lta0 is used to manage end duration B0 1 Lta Lta0 is used to mamage end duration B1 7 unused Must be set to 0 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 64 7 2 3 3 7 DUMP COMMAND COMMAND 6 Runs parallel dump of data when it exists or FLASH c
13. TURN ON A DAT DRIVE RECORDER WHICH DOES NOT CONTAIN A TAPE This case is developed at the TAPE REPLACEMENT paragraph THE RECORDER TAKES TIME TO RESPOND TO CERTAIN TCS COMMANDS The dialogue with the exterior can be put on hold by one of the following events The DAT drive is realizing a dumping The user must avoid launching a command during a dumping HOW DOES THE RECORDER OPERATES TOWARDS THE DAT DRIVE ACCESS When the recorder is turned on it enters an initialization phase which takes a few seconds At the end of this phase the DAT drive turns on and carries out an initial data dumping Its goal is the initialization of the tape informations given in Infos During this period the recorder provides the flow of serial data but does not accept commands Once the dumping is performed the recorder can be programmed time setting parameters introduction etc The Flash memory fills up in a continuous way When it reaches a threshold about 7 5 Mb a data dumping is automatically launched Infos TCS indicates the stage of the dumping in process as long as this dumping is not finished During this AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 87 whole phase you cannot send any command to the recorder This dumping time can be longer if problems show up with the tape Its normal length depends on the filling rate of the tape f
14. Wait for the end of the dumping before doing anything launching of the tape removal The recorder will always let you command again after 6 minutes at the most THE RECORDER SIGNALS AN IMPORTANT NUMBER OF FAILED DUMPINGS AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 85 BECAUSE OF DAT PROBLEMS Exceptionally a DAT DRIVE dumping can fail The causes can be the following defect located on the band temporary dysfunction of the DAT In any case the cause of data loss is explained in the TCS Infos window If for a same tape the number of failed dumpings exceeds 16 the tape is automatically ejected In case of serious problems the DAT DRIVE may sometimes not be able eject the tape TCS indicates then that the tape is ejected whereas it is still in the DAT DRIVE An important number of failed dumpings can have the following origins Lots of defects on the band Dirty DAT DRIVE heads LOW BATTERY CAUSE If the battery voltage is inferior to 12 volts the recorder decides not to turn the DAT drive on and to stop the dumping in order to protect the tape and DAT drive The number of lost dumpings for this reason is written in the TCS or SEETITAN Info window If the number of lost dumpings is too important the user should check the recorder supply system increase of the number of batteries or solar panels the best soluti
15. a correct pulse has a length above or below to the length of reference The test selection as well as the length of the reference pulse are provided in the parameter of the Time setting command The time is carried by the first front of the time receiver pulse When its length is correct the internal time of the first front is memorized by the recorder It indicates the gap which exists between the internal time and the received time pulse This information is provided with each sample dating The internal time internal time corresponding to the last received time pulse constitute the complete dating of a sample The time of the last external time receiver synchronization is available for the dating of the samples at the time of the next time pulse reception one minute after for the receivers providing only minute pulses 1 second after for the receivers providing second pulses The electrical interface of the time receiver can be of the open Collector type OMEGA negative pulse or supplying source TELECODE positive pulse The selection is done with a switch on the front face of the recorder The internal time and the hour of the last external time receiver synchronization are initialized at 0 when ON is switched If an internal calendar exists case of Flash present it is the hour of the calendar which is charged in internal when ON is switched On the other hand the field hour of time shift measurement is equal to zero until
16. page 72 7 2 4 BIT RATE AND FORMAT OF THE RS232 The characteristics of the RS232 link are the following Asynchronous type Transfer rate at 38 400 baud rate 8 bits DATA 1 start 1 stop no parity AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 73 7 2 5 PINOUT Two types of connectors exist You will find here the to pinout and connectors reference for each output To be noticed new release of hardware will implements Clipper connectors In each case are given the reference of the cable side connector Don t forget for CLIPPER connector to supply the appropiate number of female connector pins which reference is Q 100 SOURIAU CF16SC10RF 7 2 5 1 SUPPLY CONNECTOR HE301 Reference connector SOURIAU for cable 851 06 J 106 P 50 B 0 V Recorder supply in C 12 V Recorder supply in CLIPPER Reference connector SOURIAU for cable CL1F1101 CL101021 1 12V 2 OV 7 2 5 2 SEISMOMETER SUPPLY CONNECTOR This connector provides 12 volts for an active seismometer The seismometer supply is cut off by the ON OFF switch of the recorder HE301 Reference connector SOURIAU for cable 851 06 J 83 S 50 A Seismometer supply ground out C 12 V Seismometer supply out CLIPPER AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEAS
17. result in a data loss In order to avoid these data losses start by launching a FLUSH of the FLASH memory data to the tape by using the flushing window of the TCS Wait for the end of the dumping extinction of the DAT Depending on the filling rate of tte DAT DRIVE this operation can take 1 to 7 minutes Once this operation is finished launch Cassette removal under TCS The tape will automatically come out of the DAT DRIVE about one minute later Take the tape out and place it in its box The head cleaning procedure of the DAT DRIVE which follows is optional This cleaning must be realized periodicaly every 10 recorded tapes The the head cleaning is done with a specific tape called cleaning tape Cf list of the accessories at the end of this document The procedure is simple and fast Just introduce the tape in the DAT DRIVE It is automatically ejected when the cleaning is finished about 10 seconds later Take the cleaning tape out and replace it with the empty tape All these operations are commented during their execution in the TCS window Then follows an automatic phase where the data recorder imposes a flush of the data towards the new tape The filling rates of the new tape appears AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 25 The tape replacement procedure is finished At the end of its first automatically forc
18. tape 5 1 3 3 2 DUMPING THROUGH THE PARALLEL LINK When parallel link is present data can be downloaded via the parallel link This link is connected to the printer port of a PC Tcs runs the download Data are stored on the hard disk of the PC 8 Mb downloading takes 4 minutes AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 26 5 1 3 4 INFOS WINDOW The Infos window provides many information on the recorder working The informations are divided into two successives screens Information meant to be displayed are periodically received from the recorder on the serial link The last line of the screen indicates if new informations are available since the last reading opening of the Infos window Data are received only under the spy mode visualization of 3 channels So these screens do not change until leaving spy mode FIRST SCREEN The first screen tells you which parameters the recorder uses It also gives all available information on the working of the DAT DRIVE and of the flash card like the filling rate the number of stored triggers the stage of the dumping process Cf IN CASE OF PROBLEM paragraph and indicates if needed the presence of a DAT DRIVE problem as well as its nature Finally this first screen informs on the software release and the recorder identification SECOND SCREEN The second screen describes the
19. the launching threshold of the STA LTA algorithm The threshold is 1 2 of the byte value It enables to obtain all the thresholds between 0 and 128 excluded by steps of 0 5 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 59 A sample frame bit continuously indicates the result of the STA LTA gt threshold test ON OFF Byte indicating if this triplet will be present or not in the output data bO 0 OFF 1 ON b7654 must be set to 0 when paramo OFFSET MANAGEMENT SUPPRESSION Byte indicating if this triplet will manage offset measurment If not offset frames will not be generated and no offset correction will be apply to data To be noted This parameter applies to triplet O and 2 the primary and the associated secondary bO 0 Offset correction managed 1 offset correction not managed b7654 must be set to 0 when param0 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 60 7 2 3 3 2 PARAMETERS 1 COMMAND triplet 1 primary seismo 1 COMMAND 1 Parameter 1 Idem Parameter 0 but destined to the triplet 1 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 61 7 2 3 3 3 PARAMETERS 2 COMMAND triplet 2 secondary seismo 0 COMMAND 2 Par
20. 1 Go stop 0 Stop the output pulse is set to 0 1 Go the random word is set to 911 and changed every Duration milliseconds ou 1 640 seconds see bit22 value in output time frame Duration unsigned 3 bytes integer expressed in milliseconds or 1 640 seconds Isb first Type 2 Agecodagis calibration Set the DO D3 bits to 00 No parameters Type 3 Coil Agecodagis calibration Set the DO D3 bits to 01 No parameters Type 4 Stage 1 Agecodagis calibration Set the DO D3 bits to 10 No parameters Type 5 Stage 2 Agecodagis calibration Set the DO D3 bits to 11 No parameters Type 6 Generates square wave pulses F 1 2 duration DO et D3 from Titan paralelle port 7 2 3 3 10 COMMAND DIAL SPECIFICATION COMMAND 9 Receive alert Phone number COMMAND 9 1byte informations 9 bytes Spare 0 1 byte chksum 1byte AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 66 Phone number 6 bytes phone number 3 bytes spare 0 phone number bytes 2 numbers per byte b7654 first number binary encoded b3210 Second number binary encoded The number not included in the 0 9 range are ignored If the first number is set to F then Alert fucntions are disabled These are valid values for the following phone number 05 61 08 05 62 Hexadecimally expressed byte 1 6 05 61 08 05 62 FF See Alert parameters command below for aler
21. 19 Indicator of DAT dumping in progress 1 if in progress Detail of 18 bO b1 b2 b3 b4 b5 b6 b7 Time out access media Problems SCSI link Low bat detected Unexpected SCSI answer from the media Problem while loading the media Full media Reserved 0 Ejected media FRAME 20 Configuration 1 of the recorder 10 nb of channels 11 type of A D digitizer B210 000 Crystal 5323 22 001 Analog Device AD7710 010 Harris HI7190 011 Crystal 5321 22 other not till assigned b7 0 no Auxilliary channels 1 16 16 bits Auxilliary channels 12 Internal info b0 0 gt Radio Mode Off b0 1 gt Radio Mode On b1 0 gt Continuous GPS not resquested b1 1 gt Continuous GPS resquested b2 0 gt Hard drive without cycles b2 1 gt Hard drive with cycles 13 Sampling frequencies set b2 0 gt 250 Hz 1 gt 160 Hz 14 Time keeper O none 1 Installed AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 48 15 Type of recording bO O continuous 1 on trigger STA LTA b321 if media byte is not 0 000 DAT 001 SCSI DISK 16 Flash memory 0 no Flash x x mega bytes Flash usually 8 17 Media storage capacity 0 no one 2 2 Gb DAT DISK DRIVE 18 Internal info boot switch Automatic Eprom 19 Parallel link O no parallel link 1 parallel link FRAME 21 Configuration 2 of the recorder All li bytes void reserve
22. 4 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 54 Send the command Wait for the CTS deactivation end of command execution During the periods of dumping of data towards the DAT DRIVE the recorder cannot accept commands The CTS does not turn to 1 following the RTS increase until the end of the dumping AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 55 7 2 3 2 2 RESYNCHRONIZATION OF THE INPUT LINK This paragraph describes the actions that should be undertaken if one wants to send a command while the CTS signal of the recorder is active It can happen when one connects the RS232 link to the recorder while the recorder is ON The recorder can then start receiving parasitic data and may activate its CTS In this case the execution of the following actions brings the recorder back awaiting another command transmit 12 void bytes 0 the CTS must decrease If the CTS does not return to zero the recorder has a defect AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 56 7 2 3 3 COMMAND NUMBERING Each command has a number The numbers given to the digitizer are 0 to 31 The choice for the numbering is as follows PARAMETER 0 PARAMETER 1 PARAMETERS 2 PARAMETERS 3 WIDENER TRIGGER DUMP IDENT SEISMOMETER CAL
23. AGECODAGIS S A R L SEISMOLOGICAL RECORDERS TITAN USER MANUAL Rel 14 qy aii AGECODAGIS S A R L 16 rue D Auriac 31310 Rieux Tel 05 61 97 84 52 Fax 05 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 2 A Pascale A Georges Denis A Paul et Virginie A Bernardin et St Pierre A St Pierre et Miquelon A mon dernier souci ma premi re chemise A L a jacta est Agecodagis et Addis Ab ba AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 3 II me faut du nouveau n en fut il point au monde La Fontaine 1 INTRODUCTION The TITAN recorder is a recorder which is meant to be used on all data acquisition settings where the following conditions are met Simplicity of use Continuous recording Large dynamic Low weight range small physical dimension Small power consumption Use in the field Precision of the samples dating to the millisecond AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 4 Heureux qui veut comprendre l origine des choses Virgile 2 OPERATING PRINCIPLE 2 1 OPERATING COMPOSITION The different products of the TITAN range differ by their capacity of realizing certain functions The variable functions are described below The data flow within the TITAN reco
24. DAT FMTTITAN has only to be used with old generation of TITAN DAT recorder Please contact AGECODAGIS for more informations 5 2 5 TITANREL The TITANREL software standing for TITAN RELease enables the up grade of a recorder internal software This device is only possible for recorders that possess Flash memory This software charges in the recorder the TITAN _IN file which was delivered to you TITANREL expects to find the TITAN _IN file under the current directory After having indicated the version release which it is ready to charge TITANREL will ask you to indicate the type of your target recorder TITANREL will then indicate you which are the different operation to be realized on your recorder in order to carry the software leveling through to a successful conclusion This leveling requires no internal intervention on the recorder Working on the recorder must be interrupted and switched off in order to realize the leveling 5 2 6 SPLIT Split software is used to split 2 Gb files of data recorded in continuous manner on hard disk Hard disk shows 2 major files DATA DAT DATA NDX Seismological datas are stored in the big DATA DAT file DATA NDX keeps the triggered time Split ask you to define the beginning and end adress of DATA DAT you want to extract and the path name of the DATA files without extension You also have to supply the path name of the file you want to create with extracted data 2 files are then gen
25. E 14 page 74 No CLIPPER release this function is integrated in SEISMOMETER CONNECTOR when Clipper 7 2 5 3 SEISMOMETER CONNECTOR HE301 Reference connector SOURIAU 851 06 J 128 P 50 A SHIELD and DIGITAL GROUND B Sensor calibration pulse output 0 5 V 1 second CMOS output G Vertical H Vertical C North D North E East F East CLIPPER Reference connector SOURIAU for cable CL1F3101 CL103021 11 to 16 are only implemented when DIGI6V G otherwise not connected Calibration pulse Cmos level ground for Calibration pulse 12V seismometer supply 10 OV Seismometer supply 1 Vertical seismo 0 2 Vertical seismo 0 3 North seismo 0 4 North seismo 0 5 East seismo 0 6 East seismo 0 7 8 9 11 Vertical seismo 1 12 Vertical seismo 1 13 North seismo 1 14 North seismo 1 15 East seismo 1 16 East seismo 1 17 Signal ground 18 Ground shield AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 75 For TITAN recorders seismometer supply is a 9 18V power supply input 12V regulated output 3W For MINITITAN after April 1997 recorders seismometer supply is internally connected to power supply not 12V regulated For MINITITAN before April 1997 these pins are not connected 7 2 5 4 TIME RECEIVER CONNECTOR Index type BNC The function of this connector depends on the presence or n
26. FEGUARD CALENDAR Can be present or not Continues to run the internal clock stream in case of power failure AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 5 TYPE OF RECORDING Continuous triggered internal or media triggered See below in paragraph named TYPE OF RECORD for details FLASH MEMORY Can be present with a capacity of 8 Mb or absent MEDIA Without media with DAT or Hard disk MODEM Every TITAN station can accept an external communication link This link can be a modem based one a satellite one or GSM modem one The communication protocol used to communicate is a packet oriented one ATLAS PROTOCOL This communication protocol is implemented in the ATLASNET SOFTWARE that makes your PC a central site to manage a field stations network The set of commands the station is able to process depends of course of the hardware configuration of the station For example a TITAN DAT is unable to download recorded data because of his sequential access media DAT cartridge ATLAS protocol is described in the ATLAS RUGGED PC USER MANUAL document PARALLEL LINK Allows quick dumping of the Flash memory to the PC terminal when internal trigger records TCS Sampling land dating Flash mem modem Parallel Media Ext Time receiver AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0
27. GIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 41 2 3 24 bits indicating the max value reached for the 3 components of the specified triplet since the last time frame The Triplet n 13 frames are designed for internal software purposes AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 42 7 2 3 1 2 TIME FRAMES These frames indicate the time of the last sample of a primary triplet contained in the sample frame above H1 H2 H3 H4 R1 R2 R3 R4 M1 M2 M3 SYN H1 H4 Current time in seconds H1234 time in seconds size UNIX C langage 32 bits H1 most significant word R1 R4 Time of the last external time receiver synchronization same size as H1234 M1M2M3 24 bits Millisecond is a general word as well used for 1 1000 sec or 1 640 secs b23 b16 M1 b15 b8 M2 b7 b0 M3 b23 O Time setting validated by a time pulse 1 Time setting by time out of time pulse reception b22 0 1 1000 sec unit 1 1 640 sec unit b21 must be set to 0 b20 spare 0 b19 b10 Millisecond of the hour of the last correct pulse b9 b0 Millisecond of the internal time SYN synchro frame b3 0 b210 bits indicators type of frame 010 time frame b7654 bits synchro reversed in comparison to the synchro frame of the previous frame A or 5 AGECODAGIS SARL 16 rue D Aur
28. IBRATION DIAL SPECIFICATIONS 10 FLUSH 11 DAT DRIVE LOAD ALERT ALGORITHM PARAMETERS 12 DAT DRIVE EJECT 13 MISCELLANEOUS INFORMATIONS 14 spare 15 DIGITIZER TIME SETTING O SO OR SS Each of these commands is described in the following paragraphs AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL 7 2 3 3 1 triplet 0 primary seismo 0 COMMAND 0 Parameter 0 RELEASE 14 page 57 PARAMETERS 0 COMMAND COMMAND 0 1 byte LTA constant 3 bytes STA constant 3 bytes sampling frequency 1 byte STA LTA threshold 1 byte ON_OFF 1 byte Offset management suppression 1 byte chksum 1 byte The parameters are immediatly taken into account except the sampling frequency parameter which will only be taken into account after the next time frame STA and LTA constants The STA and LTA computation is based on the computation of a first order recursive filter The response of such a filter to a step input is an exponential function with a time constant T This time constant depends on Fs The constant of time STA KSTA or KLTA The relationship between T KSTA and Fs is T 1 Ln 1 KSTA Fs The equation of the filter is Yn Yn 1 Xn Yn 1 KSTA The KSTA and KLTA constants are positive numbers smaller than 1 The KSTA or KLTA constants are coded in 24 bits BO B1 B23 BO represents the m
29. N tapes We recommend the External ARCHIVE PYTHON DAT 4350XT model Contact AGECODAGIS SARL in case of supply difficulties Follow the installation instructions delivered with the DAT DRIVE Give it a SCSI address which is not already used by another drive on the SCSI bus Modify or create the TIT_ASPI CFG file in order to describe the localization of your DAT drive A PC can manage several SCSI BUS It has then several Host adapters These Host adapters are numbered in the order in which they have been recognized by the system at the time of the boot Consult your Config sys file in order to determine the number of the host adapter to which your DAT drive is affected The numbering starts at 0 The first line of the TIT_SCSI CFG file must contain the number of the host adapter to which the DAT DRIVE is affected The second line indicates the SCSI address of the DAT DRIVE on its bus This ASCII is read by FMTITAN and SEETITAN If it is absent Host adapter 0 and SCSI Adress 4 are taken AGECODAGIS can provide the complete kit DAT DRIVE and SCSI Interface Consult us The 4350 XT TRANTOR solution constitutes a universal solution that can be installed on any PC without opening the computer AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 84 Un jour tout sera bien Voil l esp rance Tout est bien aujourd hui Voil l illusion Voltaire
30. PECIFICATIONS 7 2 1 SENSOR INTERFACE I page 90 7 2 2 DATING AND TIME RECEPTION 7 2 3 RS232 LINK 7 2 4 BIT RATE AND FORMAT OF THE RS232 7 2 5 PINOUT 7 3 MAINTENANCE 7 4 LIST OF ACCESSORIES 8 IN CASE OF PROBLEMS AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 Revision History Date 11 07 06 Revision 14 Description LTA LTAO or STA LTAO to manage end duration Tsp602 Author F MOREAU Date 12 04 06 Revision 13 Description lsb Error AD7710 Author F MOREAU Date 11 04 06 Revision 12 Description lsb and input impedance for latest ADC Author F MOREAU Date 25 12 05 Revision 11 Description GPS informations in informations frames Author F MOREAU Date 25 07 05 Revision 10 Description Tpg for decimated channels Author F MOREAU AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 page 91
31. RECORDER CONFIGURATION The TITAN recorder dialogues with the outside through the RS232 link This dialogue enables to configure the parameter of recording to control the recorder and its operating The recorder is delivered with a DOS software intended to be a user friendly dialogue TCS It allows to send the recording parameters sampling frequency time setting time constants for LTA and STA and threshold for triggering visualize in real time the data and recorder setting visualization of sampled signals sampling frequency detection marks of earthquakes internal clock time shift measurements on the time receiver the parameters in the process the filling rate of the DAT DRIVE tape and of the Flash the identification number of the recorder as well as the one of the software version remove of the DAT tape or dump the Flash memory AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 18 Savoir que l on sait ce que l on sait et savoir que l on ne sait pas ce que l on ne sait pas voil la v ritable science Confucius 4 DATA RETRIEVAL AND PROCESSING 4 1 IN REAL TIME The recorder provides in real time the sampled data on the serial link This enables a monitoring of the recording function Details on the provided flow of data can be found in the chapter TECHNICAL SPECIFICATIONS 4 2 IN DEFFERED TIME The recuperat
32. TITAN PINOUT 7 2 5 6 16 16 bits CONNECTOR CLIPPER Reference connector SOURIAU for cable CL1F4201 CL124021 1 Channel 15 2 Channel 15 3 Channel 14 4 Channel 14 5 Channel 13 6 Channel 13 7 Channel 12 8 Channel 12 9 Channel 11 10 Channel 11 11 Channel 10 12 Channel 10 13 Channel 9 14 Channel 9 15 Channel 8 16 Channel 8 17 Channel 7 18 Channel 7 19 Channel 6 20 Channel 6 21 Channel 5 22 Channel 5 23 Channel 4 24 Channel 4 25 Channel 3 26 Channel 3 27 Channel 2 28 Channel 2 29 Channel 1 30 Channel 1 31 Channel 0 32 Channel 0 33 39 NC 40 Shield AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 78 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 79 7 2 5 6 1 DATA MEDIA FORMAT HARD DISK This paragraph describes how data are places on the media There are two set of data in one hand the seismological data and the indexes in the other hand The farmat of the seismological data is the same as described in the OUTPUTING SERIAL LINK paragraph above The general format of the indexes is as follows always msb first encoded bytes 0 3 time byte 4 B4 byte 5 Index type byte 6 31 Bytes 6 to 31 time i the same format as the 4 first bytes in time frames time at
33. ameter 2 COMMAND 2 1byte LTA constant 3 bytes STA constant 3 bytes DECIM 1byte STA LTA threshold 1byte ON_OFF 1 byte Unused 1 byte chksum 1 byte Parameters identical to the primary triplets except for Fs replaced by DECIM DECIM Encodes the decimation rate of this triplet in comparison to its primary channel This rate is encoded on 3 Isb bits of this byte from 0 to 7 DECIM 210 0 Rate 1 1 Rate 1 2 2 Rate 1 4 3 Rate 1 8 4 Rate 1 16 5 Rate 1 32 6 Rate 1 64 7 Rate 1 128 Beware The user has to check if the primary frequency and the requested decimation rates can be down loaded by the station digitizer on its serial link using a 38400 baud rate Each triplet generates 12 bytes per sampling periods The following combination is correct triplet 0 1 2 3 Fs 125 125 1 128 1 64 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 62 The following combination is impossible triplet 0 1 2 3 Fs 125 125 1 2 1 4 All configurations are accepted by the station The forbidden configurations may generate unpredictable behaviour TCS forbids sending impossible combinations to the recorder 7 2 3 3 4 PARAMETERS 3 COMMAND triplet 3 secondary seismo 1 COMMAND 3 Parameter 3 Idem Parameter 2 but destined to the triplet 1 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5
34. because it carries several cards plugged in the back of the basket AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 89 TITAN USER MANUAL SUMMARY 1 INTRODUCTION 2 OPERATING PRINCIPLE 2 1 OPERATING COMPOSITION 2 1 1 SAMPLING DATING 2 2 DATA MANAGEMENT 2 2 1 SUPPORTED MEDIA 2 2 2 RECORD AND STORAGE 2 2 3 DAT SPECIAL MANAGEMENT 2 3 TRIGGER ALGORITHM 2 4 MONITORING OF BATTERY VOLTAGE 2 5 PARAMETERS SAFEGUARD DURING OFF TIME 2 6 SEISMOMETER BAND PASS WIDENER 2 7 OFFSET MEASUREMENT 2 8 FRONT FACE LED 3 RECORDER CONFIGURATION 4 DATA RETRIEVAL AND PROCESSING 4 1 IN REAL TIME 4 2 IN DEFFERED TIME 4 2 1 DAT TAPE 4 2 2 PARALLEL LINK 4 2 3 BY THE MODEM OR THE LOCAL LINK 5 SOFTWARE TOOLS 5 1 IN THE FIELD 5 1 1 REQUIRED PC CONFIGURATION 5 1 2 SOFTWARE INSTALLATION 5 1 3 TCS 5 2 IN THE LABORATORY 5 2 1 REQUIRED PC CONFIGURATION 5 2 2 SOFTWARE INSTALLATION 5 2 3 SEETITAN 5 2 4 FMTTITAN TITAN DAT 5 2 5 TITANREL 5 2 6 SPLIT 6 INSTALLATION OF A RECORDER IN THE FIELD 7 TECHNICAL SPECIFICATIONS AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 7 1 GENERAL TECHNICAL SPECIFICATIONS 7 2 DETAILED TECHNICAL S
35. configuration of the recorder and informs on describing the time receiver as well as the time of the latest time synchronization AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 27 5 2 IN THE LABORATORY 5 2 1 REQUIRED PC CONFIGURATION Any compatible PC can be used The DAT tapes recorded by the DAT TITAN can be read on a PC equiped with a DAT 2Gb HP SCSI drive The laboratory PC must be equiped with a SCSI compatible ASPI ADAPTEC TRANTOR interface It must also be equiped with a VGA screen See the manufacturers manual for installation procedures as well as the MAINTENANCE paragraph 5 2 2 SOFTWARE INSTALLATION Introduce the TITAN diskette in your PC drive Create a directory on your hard disk e g md c TITAN Copy all the diskette files in the created directory e g copy a LAB CATITAN The installation is finished For DAT installation see the paragraph below LIST OF ACCESSORIES AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 28 5 2 3 SEETITAN SEETITAN enables the visualization and the extraction of data recorded on the TITAN recorders These data can be read from the DAT or from the PC hard disk Visualization zoom back and front displacement entirely corrected dating of each sampling Visualization of the trig
36. creases DIGITIZER CASE Start the recorder ON OFF switch on the front face Launch TCS software The recorder is ready to receive a TCS command The serial link is operational a few seconds after the switch is ON Proceed to the recorder configuration Cf TCS paragraph TITAN DAT DRIVE case AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 32 Start the recorder ON OFF switch on the back face If the recorder does not contain a tape the DAT DRIVE starts a few seconds later and turns off Immediately introduce a formated tape The DAT will turn on a few seconds later Wait for the DAT DRIVE extinction and launch TCS software The recorder is ready to receive a TCS command as soon as the DAT DRIVE extinction is done However all TCS observation functions are operational when the DAT DRIVE is turned on Proceed to the recorder configuration Cf TCS paragraph AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 33 Belle sans ornement et dans le simple appareil D une beaut qu on vient d arracher au sommeil Racine 7 TECHNICAL SPECIFICATIONS 7 1 GENERAL TECHNICAL SPECIFICATIONS Consumption Tension supply Baud rate of the RS232 link Internal clock stability Weight physical dimension Watertighness Cs5323 Lsb 596 nV
37. d calendar If the pulse is received the safeguarded calendar is set on time with the received time at the reception time of the pulse The external reference can be a receiver of the TELECODE OMEGA type or any other clock AGECODAGIS proposes a GPS receiver in an external waterproof case form integrating the antenna low consumption 400 mW and which delivers pulses of the same kind as the TELECODE TITANGPS minute pulses The recorder has to be informed to adapt itself to all kinds of external references in function the number of pulses per minute the width of the correct pulse min few ms the validity condition of the pulse length superior or inferior to a correct duration AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 9 All these parameters are automatically determined by the TCS configuration software according to the type of time receiver used The TCS software suggests two of them to you TELECODE or TITAN GPS or OMEGA See paragraph TCS After initial time setting datation continues to evolve thanks to an internal clock It is an oscillator which has a stability of a few 10 7 The gap between this internal time and an external reference is measured and regularly memorized at each reception of correct length pulse time signal or of satellite synchronization in the case internal GPS This gap is maintained wit
38. d for future developments FRAMES 22 to 29 Last widener commands received FRAMES 30 Rel gt 507 10 13 LATITUDE Long msp first LATITUDE P1 2 MF1 MF4 10 8 14 17 LONGITUDE Long msb first LONGITUDE P1 2 MF5 MF8 10 8 I8 nbSats FRAME 31 Rel gt 507 10 13 HEIGHT Long msp first HEIGHT meters MF1 MF4 10 2 SYN synchro frame bits 76543210 b3 0 b210 bits indicators type of frame 100 Informations frame b7654 bits synchro reversed in comparison to the synchro frame of the previous frame A or 5 Information frames are all transmitted one after the other periodicity each 8 Time frames Cf FRAME SUCCESSION AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 49 7 2 3 1 5 CORRECTED TIME FRAMES Implemented if Corrected Dating These frames indicate the corrected time of the last sample of a primary triplet contained in the previous sample frame H1 H2 H3 H4 R1 R2 R3 R4 M1 M2 M3 SYN H1 H4 Corrected current time in seconds H1234 time in seconds format UNIX C langage 32 bits H1 most significant byte R1 R4 Gap between the two pulses of external time receiver synchronization same format as H1234 M1M2M3 24 bits b23 b16 M1 b15 b8 M2 b7 b0 M3 b23 O Time setting validated by a time pulse 1 Time setting by time out of time pulse reception b22 b20 spare 0 b19 b10 Millisecon
39. d of the gap between the two last pulses b9 b0 Millisecond of the corrected internal time SYN synchro frame b3 0 b210 bits indicators type of frame 101 Corrected time frame b7654 bits synchro reversed in comparison to the synchro frame of the previous frame a or 5 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 50 7 2 3 1 6 MISCELLANEOUS FRAMES These frames are used to multiplex miscellaneous informations with data The frame s structure is the following MF1 MF2 MF3 MF4 MF5 MF6 MF7 MF8 MF9 IT NU SYN MF1 MF9 Miscellaneous informations IT Information type 0 255 and give the meaning of MF1 MF10 bytes NU Null byte Set to 0 IT 0 GPS LATITUDE AND LONGITUDE MF1 MF4 LATITUDE Long msb first LATITUDE P1 2 MF1 MF4 10 8 MF5 MF8 LONGITUDE Long msb first LONGITUDE P1 2 MF5 MF8 10 8 MF9 0 IT 1 GPS HEIGHT MF1 MF4 HEIGHT Long msp first HEIGHT meters MF1 MF4 10 2 MF5 MF9 0 IT 2 AMOUNT OF TRACKED SATELLITES MF1 AMOUNT OF SATELLITES MF2 MF9 0 SYN synchro frame b3 0 b210 bits indicators type of frame 110 Miscellaneous frame b7654 bits synchro reversed in comparison to the synchro frame of the previous frame a or 5 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 51
40. d storing ways to do Recording 2 types of recording can be used depending on the station continuous record or triggered Continuous record Data are continuously sampled and stored Triggered event are also computed and the result is kept in the internal data indexes AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 11 Triggered record Data are continuously sampled but they are only kept when a triggered event is detected See TRIGGER ALGORITHM to get more details about triggered event management Storing Two kinds of data are stored the seismological data and the triggered indexes There are 2 ways to do manage storage capacity Storing with cycle This way to do is used for fixed and remote controled stations When the storage capacity is reached the data storage media is cycled and data overwritten Indexes are not cycled When max length is reached the oldest half part of the indexes are erased Storing without cycle This way is used for portables stations or when cycling the buffer is not possible DAT tape for example When the data storage capacity is reached recording stops AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 12 2 2 3 DAT SPECIAL MANAGEMENT The data are temporarily stored in the Flash memory The DAT dr
41. e If the data are correctly received from the recorder the data line appears This software allows you to introduce the recording parameters control of the good operating of the recorder read the operating parameters identify the recorder read DAT and Flash filling rate replace DAT tape dump the Flash AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 21 It could be useful to write on your tape the name of the recorder that recorded the data contained in the tape However remember that the information is included in the recorded data The source of the data is then always identifiable The name of a recorder is defined in the factory It is composed of 9 letters describing the recorder owner followed by a number The name of a recorder can be read under TCS or SEETITAN in the Information window TITAN DAT DRIVE BEWARE Sending commands to the recorder is blocked during the transfer of the FLASH memory data to the DAT tape when DAT is on The time needed dumping depends on the filling rate of the DAT DRIVE and can vary from 1 minute to almost 7 minutes If a time setting command has been jammed check the time setting AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 22 5 1 3 1 INTRODUCTION OF THE PARAMETERS The Param
42. e Then a threshold can be reached to trigger an alert 7 2 3 3 14 COMMAND MISCELLANEOUS INFORMATIONS COMMAND 13 Miscellaneous informations COMMAND 13 1byte Hour MF1 1byte Hour MF2 1byte Hour MF3 1byte Hour MF4 1byte Hour MF5 1byte Hour MF6 1byte Hour MF7 1 byte Hour MF8 1 byte AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 70 Hour MF9 1byte IT 1byte chksum 1byte Significations for Mfx bytes are given in Miscellaneous output frames paragraph 7 2 3 3 15 COMMAND RECORD 14 COMMAND 14 Record COMMAND 14 1byte 0 10 bytes chksum 1byte When this command is received the station triggers an event in the same way the STA LTA algotihm does 7 2 3 3 16 TIME SETTING COMMAND COMMAND 15 Time setting COMMAND 15 1byte Hour H1 1byte Hour H2 1byte Hour H3 1byte Hour H4 1byte Correct pulse length ms 2 bytes Selection of the length test 1 byte Nb of time pulses per minute 1 byte Time out definition 1 byte unused 1 must be set to 0 1 byte chksum 1 byte H1234 Same format as H1234 in the time frames The length of a correct pulse indicates the length of a time shift measurement pulse when reception is good This value must take into account the possible variations in the puls widths
43. e tape is formatted in 2 partitions The main partition is partition 0 lt contains the sequential recording of the data transmitted on the serial link The data are written in blocks of 32768 bytes Partition 1 has a maximum size of 1 megabytes It contains sequentially the indexes triggering marks The data are written in 16 bytes blocks Each block of 16 bytes is an index ON HARD DISK The disk contains two files DATA DAT seismological data DATA NDX indexes 32 bytes indexes TITANFMT creayes and sized these two files at the maximum one versus hard disk size The third file named size siz gives the adress of the last byte recorded in the two files This file is 512 bytes long and only the 8 first five are used as follows DOD1D2D31011 1213 DOD1D2D3 Isbyte first last written adress in the data file 10111213 Isbyte first last written adress in the data ndx file AFTER FLASH MEMORY DUMP When downloaded using the parallel link data are placed on the hard disk of the PC running TCS There is 2 files created MMDD_XXX DAT MMDD_XXX NDX M as month D as day XXX is the 3 first letters of the IDENT see IDENT COMMAND AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 82 7 3 MAINTENANCE The heads of the DAT DRIVE must be regularly cleaned every 10 recorded tapes or when DAT DRIVE access problems are signaled on the
44. ed Flush check in the Information window that the fields indicating the filling rates of the new tape are filled removal of the going to be known If this is not the case the tape is defective and must be replaced 5 1 3 3 1 2 CASE OF FAULT Sometimes the tape may be ejected from the recorder during the recording This fact can have two origins the tape is fulll too many problems have occurred with the DAT DRIVE or the tape After the 16 th problem the recording is abandonned and the tape is ejected The TCS Information window tells you the nature of the problems and indicates you the number of FLASH gt DAT that have been lost until the ejection of the tape Cf Info window paragraph Launch a cassette removal as if the tape had not been ejected by itself and proceed to the replacement of the cassette Another problem can happen the recorder may have had more than 16 problems but was unable to eject the tape Even if TCS indicates that the tape has been ejected the tape is still in the DAT DRIVE In order to change the cassette launch a cassette removal It can be normal that the tape still does not come out Relaunch a Cassette removal when the DAT is off The tape must be ejected A last problem can arise when a recorder has been switched on without a tape in the DAT DRIVE Launch a Cassette removal The recorder will try to eject the tape without success and will then invite you to introduce a new
45. egative pulse ATTENTION The switch selecting the type of time receiver must be manoeuvred WHEN TITAN RECEIVER IS OFF AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 23 Before launching TCS check that your field PC has really time TU 20 seconds The TCS software proposes two types of time receiver TELECODE or OMEGA The configurations selected by TCS are the following Cf DATING paragraph Length of the pulse NB pulses Mn Test selection TELECODE TITAN GPS 300 ms OK if lt OMEGA 5 seconds OK if gt The time transmitted by the PC to the recorder is the time of the next full minute This time is memorized in the recorder until the reception of a time pulse ATTENTION Do not forget to check that the time has really been taken into account by the recorder by returning to the main window At the first received time pulse the recorder must be correctly set on time The time of the last resychronisation which is indicated in the window is always one minute late compared to the correct time In fact a received pulse is only validated on its descending front It is signaled only during the rising front of the next pulse This information indicates that at the indicated time there has been one correct pulse and no other since except perhaps during the last minute In case there is no pulse the recorder is set on time by time ou
46. erated the new target dat and target ndx files Indexes have been translated accordingly with the beginning adress specified that is now the beginning of the new file Split is useful to make 640 Mb large files for CD ROM archive purpose AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 31 Si j tais Roi je me mettrais en col re Louis XIV 6 INSTALLATION OF A RECORDER IN THE FIELD Check that you have all the following accessories TITAN recorder Power supply cable Dialogueue cable Time receiver and or GPS antenna Seismometer cable 12V supply source battery solar panels DAT tape if TITAN DAT DRIVE Field PC set on time field softwares Check that the ON OFF switch of the recorder is OFF Link the recorder to the seismometer to the supply source to the time receiver Position correctly the time receiver switch of the recorder according to the polarity of the pulse provided by the external reference clock except if internal GPS Cf TIME SETTING paragraph in TCS REMARK The recorder provides a 12 volts output for the possible supply of an active seismometer Use this supply for the seismometer rather than a direct battery connection ATTENTION Do not let the recorder work directely under a blazing sun The protection with a solar panel is sufficient to limit excessive temperature in
47. eter window enables you for each of the triplets to adjust the values of the following parameters Time constant for LTA Time constant for STA Triggering threshold Sampling frequency or decimation factor On off switch of the triplet Duration of pre and post event triggered recording At the end of the Parameter Menu TCS will ask you to confirm the sending of the parameters to the recorder TCS displays the parameters in use before asking you to modify them TCS must then have received these informations before allowing you to modify them The acquisition of the parameters is signaled at the bottom of the TCS screen Before the YES the parameter modification is impossible 5 1 3 2 TIME INTRODUCTION AND CHOICE OF RECEIVER TYPE Valid if no internal GPS When an internal receiver is installed the time setting is automatic The recorder time setting is a fundamental procedure for subsequent correct data Always check after a time setting operation that the recorder has the right time ATTENTION Link your time receiver to the recorder WHEN TITAN RECORDER IS OFF The use of a time receiver is accompanied by the positioning of a switch placed on the front face of the recorder This switch enables the recorder to adapt itself to different types of electrical interfaces For the two types of receivers proposed by TCS the switch must be set in the following position TELECODE Positive pulse OMEGA N
48. gering marks Extraction of DAT data onto a hard disk file Visualization of the parameters used during recording For the visualization of a DAT DRIVE tape index visualization of the triggering marks display of the corresponding hours selection of an index and direct jump to this index The jump and the data visualization corresponding to any one of the indexes or to any time can be realized in less than a minute The XTRACT function also provides the possibility of automatic data extraction from a list of hours provided in a file by the user A DAT tape can contain a big quantity of data 2 Gb The deffered processing of these data is really made easier with the index management These indexes are dependant on the STA LTA and THRESHOLD parameters that you have used to record the data One must carefully choose these parameters at the time of the recorder installation A large threshold or too large LTA or STA constants can mess the recorder and therefore limit the number of triggers Interesting signals are not marked Their search and extraction of the 2Gb mass can be long and tedious unless an exterior source of information has given you the approximative times of the events On the contrary an over sensibilization of the recorder will result in an increase of the number of triggers The extraction of interesting data could also become annoying However in all cases no data is lost the recorder records continuou
49. h the sampled data The dating is given with a 1 millisecond resolution The dating of a sample is then the reunion of the two following informations the internal time of the recorder at the moment of sampling the reception time of the last time signal pulse which allows to determine the existing gap between the internal time and the external reference AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 10 2 2 DATA MANAGEMENT Sampled and dated data are transfered to the triggering algorithm and triggered data are added This sum of data is then given permanently and in real time on the RS232 link The same data are also stored in the storage media 2 2 1 SUPPORTED MEDIA The storage hardware can be one of the following internal 8 Mb Flash memory A 2 Gb DAT tape An external hard disk See at the end of this document the description of the data format MEDIA DATA FORMAT The 8 Mb flash memory when used as media storage can be downloaded via telephone link or parallel link The 2 Gb DAT tapes can t be read in the station So the only way to get data is to remove the cartridge Data can then be read on a PC with a DAT drive and the SEETITAN software The external hard disk are also to be removed and be read on a PC These hard disk are DOS formatted 2 2 2 RECORD AND STORAGE It is to be distinguished the recording an
50. he trigger information in real time TRIGGERED RECORD Trigger algorithm output is used to trigger record The stored data begin Pre event duration before the trigger time Data are stored until the time out duration is reached or if the end of the event is detected before Event end detection is based on the following principle The LTA value just after triggering is kept in memory as LTAO The following STA or LTA values are compared to the 1 5 LTAO value When STA or LTA values stay End duration second under the 1 5 LTAO value then the event is declared as ended and recording is halted Pre event duration can be set very large but station can only recover data that are still in a 100 Kb RAM buffer Equivalent time is difficult to calculate because is dependant of compression rate sampling frequency The buffer is deep enough to satisfy every usual requests When a too long pre event duration is specify software feeds the maximum data it is possible and not more AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 15 2 4 MONITORING OF BATTERY VOLTAGE When media is installed software exploits the battery measurement and stops the media turns on dumpings as long as battery voltage is less than 12 volts Low battery voltage indicates a battery discharge that would get even worse if Media is switched on The Media dumpings are therefore blocked b
51. iac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 43 To get fully corrected time for primary channels time has to be corrected with the shift of the internal time versus external reference the propagation time of the A D converter that depends of the converter implemented see sampling paragraph A third correction has to be applied for secondary channels The propagation delay of the decimation filter has to be computed See sampling paragraph to get formula Auxilliary channels datation cannot be known very precisely The channels are scanned and converted less than 5 mS before the last primary channel before a time frame is AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 44 7 2 3 1 3 OFFSET FRAMES Two types of offset frames can be found The 1 channel frames and the 3 channels frames The distinction between both types is done at the level of the byte T bit 4 3 channels frames case These frames indicate the offset amplitude on each of the channels and for each of the triplets 01 02 03 04 05 06 O7 O8 O9 Fs T SYN 24 bits 3 bytes per channel ex 010208 for the channel 0 01 most significant word Fs idem Fs bytes of the samples frames T Type of frame b3210 Unused b4 O indicator frames 3 channels b5 Type of offset 0 Differential offset correcti
52. interrupted after the charging of the tape if the DAT drive has a serious problem of accessing the tape Each command is protected by a 3 minute time out The failure of a command brings the dumping to a halt That is why the recorder cannot be jammed during dumping When the dumping is finished the two LED of the DAT turn off UNMOUNTING THE TITAN CARDS WITH DOOR BOXES AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 88 Recorder dismantling should normally not be done by the user However who knows what kind of suprises a recording campaign in a remote and unfriendly place can bring So here is the TITAN card dismantling procedure First if TITAN DAT recorder unmount the DAT drive unscrew the 4 fixing scews on the back face of the bow and unconnect the SCSI cable and supply cable from the back of the DAT drive Unscrew the front face of the DAT drive and take it out by pushing it forward by passing your hand through the back of the recorder Go on then by unmounting the supply card which is under the front face carrying the ON OFF switch Undo the 4 fixing screws of the front face and pull its handle The supply card is firmly attached to its front face Do the same thing but imperatively after the extraction of the supply card for TITAN DAT with the second front face This front face is more difficult to take off by pulling its handle
53. ion of data contained in the recorder in the Flash or the DAT DRIVE cassette can be done by Removing of DAT tape Dumping by parallel link By activating Modem or local serial link 4 2 1 DAT TAPE TCS proposes the replacement of the DAT DRIVE tape BEWARE From the time when the user has decided to withdraw the tape TCS will not accept new commands until the procedure of tape withdrawal is finished that is when a new tape is introduced into the recorder This is to avoid false manipulations which could result in letting the recorder work without tape in the DAT DRIVE It is useful to remember that the tape changing does not stop acquisition DAT TAPES LIKE COMPUTER DISKETTES MUST BE FORMATED BEFORE BEING LOADED IN THE RECORDER Cf FMTTITAN software Tape replacing must be performed as fast as possible in order to avoid data loss by overflowing of the FLASH memory Prepare a formated tape before launching the tape replacement procedure AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 19 The tape extracted from the computer can then be exploited in a lab on a PC DOS equiped with a DAT drive SCSI card using the SEETITAN software Cf paragraph TOOLS SOFTWARES BEWARE A tape wears out Do not use a tape twice in the DAT recorder The cycle Formating recording reading reformating recording is to be banned un
54. its word in the order oldest to most recent most significant byte to least significant byte coding in complement at 2 As usually defined the triplet numbers are attributed as follows 0 primary seismometer 1 1 primary seismometer 2 2 secondary seismometer 1 3 secondary seismometer 2 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 39 4 15 not attributed 1 channel frames Exactly the same except for Rate Compression rate b3210 compression rate from 1 to 8 b4 1 indicator 1 channels frames b765 primary frequency f 2 s complement on 3 bits 1 if bit 22 of byte M1 in time frames 0 Fs 31 25 Hz 2 f 2 if bit 22 of byte M1 in time frames 1 Fs 20 Hz 2 f The compression principle for 1 components frames differs from the 3 components one as follows The first frame is absoluted coded but the only first 3 bytes contains data Other are 0 For following frames rate 0 The only 3 first bytes carry informations delta coded 24 bits rate 1 3 samples on the 3 24 bits delta coded rate 2 6 samples on the 3 24 bits 12 bits each delta coded rate 3 9 samples on the 3 24 bits 8 bits each delta coded rate 4 12 samples on the 3 24 bits 6 bits each delta coded rate 6 18 samples on the 3 24 bits 4 bits each delta coded rate 8 24 samples on the 3 24 bits 3 bits each delta coded Triplets 8 15
55. ive is then off The recorder power consumption is low When the memory is full the recorder switches on the DAT and writes down the data on the tape Then it erases the flash memory and turns off the DAT drive The recording is not interrupted during this operation The Flash memory has a 8 mega bytes capacity and allows to turn on of DAT once every 2 5 hours at 250 samples sec a little more than once a day at 31 25 sam sec In case of a problem with the DAT drive the emptying of the Flash memory can be abandonned The number of lost emptyings is given in the TCS Information window seen with SEETITAN If the batterry voltage is too low lt 12 Volts the correct DAT DRIVE functioning can not be provided This can destroy the tape and damage the DAT DRIVE The DAT DRIVE switches to off and the emptying is lost The number of dumpings lost due to DAT DRIVE anomalies and too low voltage is indicated in the TCS Information window and SEETITAN If more than 16 dumpings are lost due to DAT DRIVE anomalies the tape is ejected The filling threshold of the Flash memory that provokes the beginning of the DAT DRIVE for a dumping depends on the filling rate of the tape and on the sampling frequency This threshold goes down when the tape fills itself and the sampling frequency increases The DAT DRIVE storage capacity is 2 Giga bytes for a 90 meter tape This enables to obtain a recording capacity of Fs Hz Length month 31 25 4 62 5 2 125 1
56. lear when authorized COMMAND 6 1 byte Dump erase 1 byte unused 9 bytes chksum 1 byte Dump bO 0 gt Dump 1 gt Erase 7 2 3 3 8 IDENT COMMAND COMMAND 7 Enters a 9 chars ident for the station COMMAND 7 1 byte Ident 9 bytes chksum 1 byte Care must be taken for the length of IDENT When used in Tcs software the only 3 first chars are used to make the extension field of the generated file during dump 7 2 3 3 9 COMMAND SEISMOMETER CALIBRATION COMMAND 8 Send 0 5V pulses to seismometer for calibration purpose see seismometer connector pin out below COMMAND 8 1 byte Calibration type 1 byte Duration 3 bytes Go Stop 1 byte spare 0 5 bytes chksum 1 byte Calibration type AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 65 Type 0 generates a 5V pulse for 10000 milliseconds or 1 640 seconds see bit22 value in output time frame Go stop is not used Duration is used to define the pulse duration When 0 a 10000 milliseconds or 1 640 seconds is generated Type 1 generates a random pulse 0 or 5 V The output is changed every duration milliseconds The new bit is the exclusif or result of the bits 17 4 1 and 0 of the random word The word is then shifted one bit left and the new bit is the Isb bit The initial value for the random word is set to 91
57. less the first recording phase was very partial filling rate less than 30 It is better to use only new tapes in the recorder 4 2 2 PARALLEL LINK TCS proposes the dumping of the content of the Flash memory on a quick parallel link The obtained data are stored on the PC hard disk The Flash memory should be erased at the end of the transfer 4 2 3 BY THE MODEM OR THE LOCAL LINK TBD AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 20 La machine a gagn l homme l homme s est fait machine fonctionne et ne vit plus Mahatma Ghandi 5 SOFTWARE TOOLS The TITAN recorders are delivered with a DOS 3 1 2 1 44 Mb diskette which contains all the TITAN softwares These softwares are divided into two parts FIELD softwares and LAB softwares depending on where these tools are meant to be used in the field or in a lab 5 1 IN THE FIELD 5 1 1 REQUIRED PC CONFIGURATION Any kind of PC is suitable as long as it has a RS232 link SUBD 9 Points 5 1 2 SOFTWARE INSTALLATION Introduce the diskette in your PC drive Create a directory on your disk e g md C TITAN Copy all diskette files in the created directory e g copy a FIELD C TITAN The installation is finished 5 1 3 TCS The TCS software allows the configuration of the recorder Link your field PC to the recorder by using the dialogue cable Launch the TCS softwar
58. n this sample and number of the triplet concerned b3210 f Fs code f 2 s complement on 4 bits 1 if bit 22 of byte M1 in time frames 0 Fs 31 25 Hz 2 f 2 if bit 22 of byte M1 in time frames 1 Fs 20 Hz 2 f b7654 Number of the triplet 0 15 SYN synchro frame bits 76543210 b3 0 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 38 b210 bits indicating the type of frame 000 Sample frame trigger condition not fulfilled 001 Sample frame trigger condition STA LTA gt THRESHOLD b7654 bits synchro reversed 1 frame out of 2 1010 ou0101 Rate Compression rate b3210 compression rate from 1 to 8 b4 0 indicator 3 channels frames b765 primary frequency f 2 s complement on 3 bits 1 if bit 22 of byte M1 in time frames 0 Fs 31 25 Hz 2 2 if bit 22 of byte M1 in time frames 1 Fs 20 Hz 2 f xThe compression principle for 3 components frames is as follows first frame of this triplet following the last dating frame is coded in absolute rate undefined following frames of this triplet until the next dating frame in delta coding Un Un 1 If the amplitude of N consecutive delta samples allows it storage of N delta samples in 1 24 bits per packs of 24 bits if rate 1 12 bits if rate 2 8 bits if rate 3 6 bits if rate 4 4 bits if rate 6 3 bits if rate 8 Arranged in a 24 b
59. on q1 Absolute The frames of differential offset correction give the gap between the offset affecting the transmitted data before and after this frame This offset is suddenly modified when this frame is transfered so that the raw data are alchannels centered around 0 The frames of absolute offset give the value of the offset measured by the recorder and affecting the raw data from this frame The two types of offset frames are always transmitted in bulk b76 Unused SYN synchro frame bits 76543210 b3 0 b210 bits indicators type of frame 011 OFFSET Frame b7654 bits synchro reversed in comparison to the synchro frame of the previous frame A or 5 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 45 1 channel case Same as 3 channels case but information is only carried by the 3 first bytes of the frame and b4 1 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 46 7 2 3 1 4 INFORMATIONS FRAMES These frames are periodically placed in the data and provide informations on the internal functioning of the digitizer The format of the frames is as follows lO 11 12 13 14 15 16 17 1819 NUM SYN NUM sequence number of the information frame The meaning of the li bytes depends on the number of information frames This number is between
60. on depending on the installation setting Note that the number of lost dumpings due to low battery is not limited to 16 as is the case in the number of dumpings lost due to DAT drive problems THE RECORDER DOES NOT SET ITSELF ON TIME One minute after the time setting by TCS the field hour indicates time out The recorder has not received time pulse validating the Time Setting command Is the time receiver connected to the recorder Did you correctly position the selection switch of the time receiver type in the right position corresponding to your external reference BIG SHIFT BETWEEN THE RECORDER TIME AND THE EXTERNAL REFERENCE If you are sure of your external reference the internal recorder oscillator must be retuned The recorder except MINITITAN has on the front face a TEST connector as well as a hole behind which you can find the adjustment screw of the AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 86 internal oscillator The TEST plug provides 2 048 MHz A 1 4 tourn clockwise provokes a 13 10 8 variation of the oscillator frequency TCS ANSWERS Time out reached The stream of data coming out of the recorder is lost Is the RS232 cable correctly connected Did you wait a few seconds after having switched the recorder ON before launching TCS blincking of the front face LED Is the recorder ON YOU
61. orrected if needed during data processing See technical data sheet of manufacturer Analog Device AD7710 Crystal CS5322 CS5323 The propagation time of the converters is 29 samples for Crystal 4 samples for Analog Device The TITAN recorders can receive depending on the model 1 3 or 6 analogical channels The 1 3 or 6 converters work all at the same sampling frequency called primary frequency The frequency of primary sampling can be chosen among the following values 250 Samp sec 125 Samp sec 62 5 Samp sec 31 25 Samp sec See restrictive conditions at paragraph PARAMETER COMMAND 2 The seismological data are grouped together in triplet The 3 channels models group data in a single primary triplet 6 channels models in two triplets The 1 channel model is specific see size of the outgoing link However we will talk about triplet in the rest of the manual for the 1 channel models even if the word is in this case not appropriate From each of the primary triplet also results a secondary triplet obtained by filtering decimation of the primary triplet The decimation ratio can be chosen among the values 1 2 1 4 1 128 1 DECIM The propagation time of the decimation filter is constant in the band pass It depends on the decimation ratio and on the primary frequency TPG 127 2 DECIM 1 Fsprim lt is measured between the FIRST primary channel sample and the FIRST secondary channel of each s
62. ost significant word sign bit The coded number is equal to KSTA B1 21 1 B2 21 2 B3 2 3 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 58 Such a filter reaches 90 of its asymptotic value after a 10 T time Sampling frequency b76543210 b210 Sampling frequency 000 Fs 31 25 Hz or 20 Hz 001 Fs 62 5 Hz or 40 Hz 010 Fs 125 Hz or 80 Hz 011 Fs 250 Hz or 160 Hz other unused b76543 must be set to 0 when param0 See restrictive conditions at paragraph PARAMETERS 2 COMMAND Warning When primary Sampling frequency is changed using parameter0 or parameters command the sampling frequency is applied to both channels at the same time KSTA KLTA constants that depend of The primay sampling frequency for parameter0 parameters1 and Alert parameters commands have to be re computed accordingly and resent The secondary sampling frequency will also be changed then the parameter2 and prameter3 commands have also to be re computed and resent accordingly Warning Only the above values are accepted by the station If different values for the primary channels are sent the station may behave in an unpredictable channel There is only one same primary frequency for the two primary triplets The frequency which is taken into account is the last one received by PARAMETERS 0 or 1 LTA STA threshold This byte enables to encode
63. ot of an internal GPS receiver Recorder Without internal GPS This connector enables the linking of the external time receiver Recorder with internal GPS This connector enables the linking of the external antenna coming from the GPS integrated in the recorder 7 2 6 4 DIALOGUE CONNECTOR Reference connector SOURIAU 851 06 J 107 S 50 A RxD by PC B TxD byPC C CTS D RTS E Ground F DCD G ON OFF RS232 The G and E pins must be reconnected together inside the plug AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 76 CLIPPER Reference connector SOURIAU for cable CL1F3101 CL103021 18 contacts CF16SC10RF Parallel link 3 masse 4 hs_in in 5 hs_out out 6 d3 out 7 d2 out 8 d1 out 9 do out Serial link 10 ground serial link 11 _off in 12 rxd By external PC gt out 13 cts out 14 txd By external PC gt in 15 rts in 16 dcd modem in Titangps interface 17 12V TITAN GPS supply 1 Time pulse GPS output 2 Gps ground Spare z 18 for PC dialogue cable SUBD 9 1 NC 2 Rxd By PC 3 Txd By PC 4 DTR connected to Station DCD MODEM 5 Ground 6 NC 7 RTS Pc out 8 CTS Pc in 9 NC AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 77 7 2 5 5 MINI
64. rameter0 1 Typically KLTA 300 secs KSTA 60 secs Threshold Byte 1 255 Typically 60 when weight is 5 Weight Byte 1 255 Tipycally 5 AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 69 Algorithm description STA andLTA are only computed when an alert phone number is defined This computation is achieved only on the channel 0 LTA is computed in regular manner see parameter0 STA is computed with min abs signal weight LTA as input Then the ratio 10 Weight LTA STA is compared to threshold When higher then an alert is generated and the alert phone number is dialled The quescient value of the ratio is 50 as STA LTA When a short spurious signal is seen the LTA will stay quite constant and the STA will grow Then the ration will fall down to the min value of 10 when STA Weight LTA Then the signal disappears and the STA return to quescient value LTA Then the 50 threshold is not over For high level signal that grow up and falled down slowly the STA fall down and the ratio too But as LTA follows STA the ratio stays to quite 50 When signal disappear slowly it stays to 50 and no alert is generated When a strong earthquake is recorded the STA falls down and the ration is 10 Then the LTA gets time to grow up Then signal disappear and STA come back to quescient value But as LTA has grown up the ration override the 50 valu
65. rder is as follows In the following paragraph the words in bold type represent the functions changing from one range product to another The seismological channels number of ways that the recorder can manage are converted into digital streams by the Analogical Numerical converter s 16 auxilliary channels can also be added with low conversion rate versus seismological one The data are then dated and sent to the RS232 link The time setting of the recorder is automatic if the recorder has a safeguarded calendar At the same time data are sent to the triggering algorithm STA LTA and then to the recording manager which decides to record everything or to keep only the periods of signal which have provoked the trigger Recording continuous triggered The data are then transmitted to the Flash memory which buffers them with a capacity of 8 Mb These data are then copied on to the DAT or to a modem or on the parallel link of the recorder The TITAN recorders differ at the level of the operating blocks described above which can be different from a product to another or even absent NUMBER OF SESIMOLOGICAL CHANNELS 1 3 or 6 Cf paragraph SAMPLING TYPE OF SEISMOLOGICAL A D CONVERTER the A D converters can be of the Crystal brand or of the Analog Device brand Best performances are obtained with the Crystal converters Cf paragraph SAMPLING DATING The sample dating can be simple or corrected See paragraph DATING below SA
66. recorder Use a cleaning tape and do what is said in the paragraph TCS TAPE REPLACEMENT The recorder has a bag which absorbs humidity except MINITITAN This bag is placed on the front face of the recorder This bag must be replaced periodically The damp bag can be regenerated with heat in a oven at 120 C during 1 hour and then be reused 7 4 LIST OF ACCESSORIES You can contact AGECODAGIS SARL for the supply of the following TITAN accessories FUSE 5 20 4 Amperes DAT TAPES Use DDS 4 mm 90 meters tapes Avoid No Name products DDS 4 mm cleaning tape SCSI INTERFACE ON PC Any ASPI compatible solution is possible For example TRANTOR ADAPTEC TRANTOR solution is recommended ADAPTEC AHA 1542 To install in the laboratory PC Supply the AHA 1540 or AHA 1542 reference Contact AGECODAGIS SARL in case of supply difficulties Follow the installation instructions delivered with the card TRANTOR T348 This is an interface print port to SCSI and it can be installed on any PC even in the field PC Attention it is conceived to dialogue with so called external units and is therefore delivered with a SCSI Centronics connector Follow the instructions concerning the installation of the software AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 83 DAT DRIVE Install it on the laboratory PC in order to read the DAT TITA
67. riod whose length depends on the frequency of the primary sampling The value of the offset on each of the channels is regularly provided with data in the offsets frames 2 8 FRONT FACE LED All the products of the range have a flashing LED in front face This blinking LED blinks one time per seconde and tells the user some useful informations as follows the cycle ratio gives an idea of the filling rate of the station when the blink is very short the filling ratio is quite null When the LED stays on quite a second per second the media or flash is quite full each time a trigger condition is achieved the LED stay ON for 4 seconds Then knocking the ground with your foot will instruct you on the good connection of the seismometer to the station each time an external pulse time receiver is seen by the station the led forget to blink Looking at the led for 1 minute can make you sure that time receiver is well connected to station most of time receivers send one pulse per minute when problem are encountered with media the blinking period of the led s blink is turn to 1 blink every 4 seconds slow when Media is in use the led s blink is turned to 4 blinks every second fast AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 17 Le fou se croit sage et le sage reconnait lui m me qu il n est qu un fou Shakespeare 3
68. rom 1 to 7 mn The recorder will always give you back the control after 7 minutes at the most management of a time out The different stages of an dumping are the following Charging of the band The DAT drive puts itself at the begining of the band This stage typically takes 30 seconds and is systematic after each turning on of the DAT drive for a Flush or tape removal If the charging fails the recorder turns the DAT drive off and turns it back on for a new try The recorder has 3 minutes at the most to charge the band If the charging is not realized in 3 minutes the dumping is abandonned Going to EOT as End Of Tape The DAT DRIVE winds the band until it finds the last written data This operation can take up to one minute when the band is really full Writing DATA The DAT drive transfers the content of the FLASH card on the band The length depends of course on the quantity of data contained in the FLASH card The time needed to transfer 8 Mb is 3 minutes Rewinding the Tape After writing the data the DAT rewinds the tape to its beginning in order to write down the triggering indexes The time needed is the same as the one of the Going to EOT stage Writing Index Writing of the indexes at the beginning of the tape Very fast stage Unloading Tape The DAT drive unloads the tape before turning itself off All those stages are indicated simultaneously in the TCS or SEETITAN Infos window The dumping can also be
69. sly But a good selection of the trigger parameters enables you not to loose too much time when processing the data Thanks to SEETITAN the interesting data on the tape can easily be extracted and stored on hard disk files The hard disk files can also be visualized by SEETITAN or be transmitted on a bigger processing computer by ETHERNET for example AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 29 The entirely corrected dating of each sample corrects The gap between the internal time and the last received correct time pulse The propagation time of the digitizer anti aliasing filter This dating represents the exact time when the signal has been presented to the recorder input for the primary triplets The TITAN recorder permanently indicates the amplitude of the continuous component on each of the channels offset The amplitude of this offset is transmitted on the data frames The raw signal can therefore always be recentered The processing of information contained in the offset frames enables the user to bring back the signal around zero for visualization SEETITAN does this work The offset is corrected at the visualization each time one presses the R button AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 30 5 2 4 FMTTITAN TITAN
70. t Cf DATING paragraph If the drift of the internal clock in comparaison to the external reference gt 25ms day is too important the oscillator must be turned A tune potentiometer can be found on the front face of the recorder There is also a 2 048 MHz port The potentiometer enables to tune the oscillator to its nominal frequency WARNING the oscillator is stable at 5 10 7 It is then necessary to use a 2 048 reference frequencemeter with a precision better than 5 10 8 in order to tune the oscillator Cf also paragraph IN CASE OF TROUBLE AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 24 5 1 3 3 DATA RETRIEVAL This paragraph does not concern the digitizers We will examine the TITAN DAT DRIVE and MINITITAN cases 5 1 3 3 1 REPLACEMENT OF DAT TAPE TITAN DAT 5 1 3 3 1 1 NORMAL CASE AND CLEANING OF THE HEADS The normal case consists in replacing a tape which is still in the DAT drive Its filling rate approaches 100 for example or we would like to take this tape out and replace it with an empty one in order to be able to take the data back to the laboratory Before starting the procedure of tape replacement be sure to have an empty and FORMATED tape Try really to have this tape close by The replaccement of the tape must be done as fast as possible in order to avoid the capacity exceeding of the FLASH memory which would
71. t parameters and alert algorithm description When an alert is triggered the modem is swithed on and dialled If a carrier detection is acchieved within 1 minute the alert is defined as sent Itis up the the called station to ask questions and to hang up If no carrier is gotten within a minute the modem is hanged up and another try will be performed using a random delay between 20 seconds and 2 minutes These tries will be performed 6 times max AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 67 7 2 3 3 11 FLUSH COMMAND NOT EXECUTED WHEN MODEM LINK USED COMMAND 10 FLUSH COMMAND 10 1byte Reset 1byte unused 9bytes chksum 1byte This command forces a dumping of the FLASH memory towards the MEDIA The CTS decrease as soon as the dumping is launched The recorder cannot respond to a new command as long as the dumping is not finished the CTS does not increase when the RTS does The Reset byte is only used when hard disk media is implemented When Reset is 1 the data and index pointers are reset to 0 before flush The hard disk is then emptied before the present flush 7 2 3 3 12 TAPE LOADING AND FORMATTING COMMAND COMMAND 11 TAPE LOADING COMMAND 11 1byte Formatting request 1 bytes unused 9 bytes chksum 1 byte Formatting request 0 no tape format 1 tape format is process To e
72. the reception of the first PULSE Note that MINITITAN only accepts receivers of the TELECODE type The hours are encoded in seconds milliseconds The number of seconds is encoded in a long integer 32 bits in the UNIX format or C language number of seconds gone by since midnight January 1 1970 The milliseconds are encoded in an integer of 10 bits Cf format of the time frames AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 37 7 2 3 RS232 LINK 7 2 3 1 OUTPUT LINK Data are grouped in 12 bytes frames Ther are different types of frames Each frame has a byte reserved for frame synchronization 7 2 3 1 1 SAMPLE FRAMES Channels are grouped in triplets Ech triplet has a number 0 15 Numbers 0 7 are reserved for seismological high dynamic data 8 15 triplets are used for special purposes described below Triplets 0 7 There are two types of sample frames the 1 channel frames and the 3 channels ones The distinction between the two types is done with the bit 4 of the Rate byte 3 channels frames They contain sequentially the numerized data as well as useful information sampling frequency of triplets and compression rate 24 bits 3 bytes per channel ex C01 C02 C03 for the channel 0 C01 most significant byte C01 C02 C03 C11 C12 C13 C21 C22 C23 Fs Rate SYN Fs indication byte of the sampling frequency used to obtai
73. uper frame AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 8 Each of the triplets can be part of the final data or taken out from it by user command The sampled data are given in the format 24 bits per channel AUXILLIARY CHANNELS When 16 16 bits converter is implemented a set of 16 channels are sampled one time every 128 seismological primary channel sample These auxilliary data are sampled at quite the same time the last primary seismological sample is refer to Time frames paragraph for details The Auxilliary data cannot be switched off DATING The data are dated after sampling and decimation filtering It is then advisable to correct the dating for the propagation time of sampling and decimation filtering Cf paragraph SAMPLING The internal clock is set on time with the command TIME SETTING The received hour must indicate the reception time of the next clock pulse At the reception of this pulse the received hour is loaded in the internal clock If no pulse is received after 1 minute the recorder automatically sets the right time by taking as internal time the received hour 1 minute This time out clock setting will be signaled in the TIME frames Recorders that have an internal calendar continue to run the internal clock when the power is OFF The time charged in internal in case of time out is then hour of the safeguarde
74. xecute once the tape has been introduced in the DAT DRIVE This loading is followed by an automatic FLUSH of the FLASH memory data towards the new tape The CTS decreases again right after the end of the command reception The DAT DRIVE turns off at the end of this command The recorder cannot accept new commands as long as the following dumping is not finished The CTS does not increase if the RTS does AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 68 7 2 3 3 13 TAPE EJECTION ALERT AGORITHM PARAMETERS COMMAND Depends if a DAT is installed or not in the recorder IF DAT INSIDE COMMAND 12 TAPE EJECTION COMMAND 12 1 byte unused 10 bytes chksum 1 byte The CTS decreases again only after the end of the ejection The DAT DRIVE stays on at the end of this command IF no DAT INSIDE COMMAND 12 ALERT ALGORITHM PARAMETERS COMMAND 12 1 byte LTA constant 3 bytes STA constant 3 bytes spare 0 1 byte threshold 1 byte Weight 1 byte Spare 0 1 byte chksum 1 byte Alert algorithm is design to generate alert only on strong earthquake It runs only on the primary channels with the same parameters set It also only runs when an alert phone number is defined see DIAL SPECIFICATIONS COMMAND KSTA KLTA idem Parameter 0 KSTA KLTA The sampling frequency is the primary one pa
75. y the recorder until the battery voltage exceeds 12 volts During all this period the recorded data are lost but the recorder still functions and resumes recording as soon as the battery voltage allows it 2 5 PARAMETERS SAFEGUARD DURING OFF TIME Recorders equiped with a FLASH memory internally save all parameters As said before the clock is also safeguarded and continues to run during the time when tation is turn OFF 2 6 SEISMOMETER BAND PASS WIDENER The recorders running software release gt 23 can run a digital band pass widener enabling to reduce the cutting frequency of a seismometer The TCS software enables to define the characteristics of the used seismometer but also the one you would like to simulate This digital widener can be used far example to open a 2 Hz L22 type seismometer to a 5 sec equivalent one Widener can be activated with TCS software You need to know before activation natural frequency of the seismometer f0 the seismometer s damping factor when loaded with station the corner frequency you wish f1 The maximum f1 f0 ratio is ten for proper operation Please contact AGECODAGIS to get more details AGECODAGIS SARL 16 rue D Auriac 31310 Rieux France T 33 0 5 61 97 84 52 F 33 0 5 61 97 84 51 TITAN USER MANUAL RELEASE 14 page 16 2 7 OFFSET MEASUREMENT The offset affecting data on each of the channels is continuously measured by the recorder The offset is measured during a pe

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