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MAN-C24-0001 - CMG-CD24 Operator`s Guide

1. The Triggering pane is very similar to the corresponding pane of the Configuration setup window although not all options are available since some require rebooting the digitiser See section 3 1 on page 25 for more details 3 2 3 Calibration You can check that your instrument is correctly calibrated by injecting known signals into the sensor s feedback loop The Calibration pane allows you to do this Issue C March 2011 Operator s Guide t W3700 GO00 DM32 6X Control I System Triggering Caraion Mass Coemol Data Flow Sine Wave Frequency y 2 lt Hz z Square Wave step C Broadband Noise Component Pro 2 2j Duration mirates CNS C EN 100 zi Ampltude ALL Each channel calibrates the corresponding component of the instrument Select one or all components for calibration On three channel digitisers the calibration signal is digitised at a slower rate and returned as a Mux channel see above ending MB On eight channel models it is returned as a full speed channel ending Xn where n is an integer specifying the tap as for the normal outputs The Duration box tells the digitiser how long to provide the calibration signal before disconnecting This avoids the system being inadvertently left in calibration mode The default is 2 minutes If you change this setting it will revert to the default value after one calibration stage All G ralp dig
2. 36 Issue C Operator s Guide Usually the transmit and receive rates of the data port will be the same If not you may select different data rates by removing the tick in the check box marked Identical TX RX rates The Stop Bits option allows you to choose whether the serial link uses 1 or 2 stop bits In most cases this can be left at 1 although 2 may be required if you are sending data over difficult transmission lines for example some types of radio link Using 2 stop bits will add a 10 overhead to the data You will also need to set the data rate for Scream s local serial port as well as for the EAM or other communications device if you are using one In Scream you can configure a serial port by right clicking on the serial port s icon not that of the digitiser and selecting Configure from the pop up menu For more details consult the online help or user guide for Scream If you are using an additional communications device you should consult its documentation to learn how to set its baud rate 3 2 The control dialogue To control a digitiser while it is running either right click on the digitiser s entry in the list to the left of Scream s main window not the Local or COMXX icons and click Control or simply double click the entry Scream will then contact the digitiser and retrieve its current status a process which will take a few seconds after which the Control window will be displayed Onc
3. CMG CD24 Compact Digitiser Operator s Guide Part No MAN C24 0001 Designed and manufactured by G ralp Systems Limited 3 Midas House Calleva Park Aldermaston RG7 8EA England Proprietary Notice The information in this manual is proprietary to G ralp Systems Limited and may not be copied or distributed outside the approved recipient s organisation without the approval of G ralp Systems Limited G ralp Systems Limited shall not be liable for technical or editorial errors or omissions made herein nor for incidental or consequential damages resulting from the furnishing performance or usage of this material Issue C 2011 03 29 CMG CD24 Table of Contents AAA adds ec cane dunce dunes Daana rios ESETE VENOUS KITE EAEE deset 6 1 0 1 State of health MORATA OO a a Ai 7 A Saser aon es site nee eree Binsin toi lea vind AES Spidey eked EEDE TARARUA DRT EE INERTE ki 7 1 1 1 Storage and interfaces roerne wate aia ei a ANE ER 7 1 1 2 Wireless networking i e ssccvarieteasescautehsctawsnarvniea E a goo A EEE E E N 8 2 Setting up the CDZT a 10 2 1 GOMMOCCUOLS A she end NS TENEN EEEE I NSSE IVES aia 10 2 2 Test installato aeons 10 2 3 Setting up the Ethernet or wireless interface moconononncnronronnonocnonisananncninnnoso 13 2 3 1 Using Devices ta OT a AR id EE AE acia 13 22352 Using DHGP ara pda 16 2 3 3 Configuration with the web interface moocoommmsssmmmmmecsrrormsiiiisss 17 2 3 4 Installing wireless
4. switches the instrument into a one second response mode which allows you to monitor the mass positions more easily You can issue this instruction from the Mass Control tab W3420 6591 DM32 6X Control 15 x Data Flow System Triggering Calibration i Centering Center Now Vertical N South E West V Enable AutoCentering afso E X cose 7 Herr To switch into one second response mode click Centre 3 2 5 Data flow The CD24 operates in one of several transmission modes These modes relate to how the unit uses its Flash memory as a simple data store from which you can request data FILING DUAL and DUPLICATE modes as a buffer holding unacknowledged blocks which are transmitted in preference to real time data FIFO mode or as a buffer holding unacknowledged blocks which are transmitted whenever the channel is free but no real time data blocks are ready ADAPTIVE mode not at all DIRECT mode 40 Issue C Operator s Guide Separate from these modes are buffering modes which tell the unit what to do when its Flash memory becomes full either Carry on overwriting the oldest data held or stop writing and switch the CD24 into DIRECT mode You can switch between transmission modes in Scream by right clicking on the digitiser and clicking on Control then navigating to the Data Flow pane W3420 6591 DM32 6X Control 0 x System Triggering Calibration Mass Co
5. Issue C Operator s Guide 8 Use Devicelnstaller to find the CD24 on the new network If your computer is configured to obtain its network address automatically both it and the CD24 will be using automatic random IP addresses Automatic random addresses all begin with 169 254 Both hosts will choose a different one every time they are power cycled or rebooted or when the wireless network connection is lost To prevent this happening configure your computer to use a static IP address and use the Assign IP wizard in Devicelnstaller to assign a static IP address to the CD24 March 2011 115 CMG CD24 7 7 Appendix G Specifications Outputs and response Physical Power 116 Input range Nominal Sensitivity Standard output format Noise free resolution NPR at 20 samples s Digital signal processor Output rate RS232 baud rate Operating temperature range Case material Internal thermometer accuracy Internal thermometer linearity Internal thermometer resolution Dimensions excluding connectors Weight Voltage requirements Current at 12 V DC with GPS 10V differential 0 9uV count 24 bit gt 132 dBr m s gt 22 bits TMS3200 at 144 MHz User selectable User selectable 10 to 75 C Die cast aluminium 0 33 C 30 C 0 5 C 10 50 C 1 0 C 10 75 C 0 5 C 0 0625 C 160 x 160 x 90mm 1 95kg 10 24V DC 165 mA Issue C
6. Once you have made all the changes click on Apply Settings to configure the digitiser 2 3 3 1 Wireless Settings 1 Click on WLAN Wireless Local Area Network to open the WLAN Settings page March 2011 17 CMG CD24 War aser D 20 44 02 4015 VILAN Sattinga 2 Change the Network Name i e SSID from LTRX_IBSS to a suitable name for your installation This name will be announced to any nearby wireless devices when they search for networks 3 If you are using an ad hoc network change the second Network Name box as well Otherwise deselect Ad Hoc Network Creation 4 Under Wireless Network Security set Security to WEP and configure the security parameters If you do not do this anyone will be able to access the CD24 and change its configuration 5 Make a note of the security parameters you have used 6 Click OK followed by Apply Settings in the main menu The Wi Port will restart 7 If you are setting up an infrastructure network configure your wireless access point or router to use the new name and security settings and power cycle the CD24 to make it reconnect to the network 8 Reconnect your computer to the wireless network using the new name and security settings 2 3 3 2 Configuring the serial channels 1 The Wi Port has two serial channels to which you can connect By default these are exposed on ports 10001 and 10002 2 Channel 1 normally port 10001 is connected to a serial
7. Operator s Guide 8 Revision history 2008 10 03 2011 01 10 2011 03 21 March 2011 A B C New document Revised and reformatted Added triggering information and additional network configuration Added CENTRE and AUTOCENTRE commands Various minor revisions 117
8. the CD24 will ask you for confirmation Enter y to confirm You will not be able to access any data previously held in Flash memory after issuing this command 5 9 Transmission modes The CD24 operates in one of several transmission modes These modes relate to how the unit uses its Flash memory For more details see section 3 2 5 page 40 5 9 1 DIRECT Syntax DIRECT Instructs the CD24 not to use Flash memory for storage Instead all data are transmitted directly to clients 5 9 2 FILING Syntax FILING Instructs the CD24 not to transmit blocks to clients automatically but to store all digitised data in the Flash memory The memory is used in circular fashion i e if it becomes full incoming blocks begin overwriting the oldest in memory March 2011 75 CMG CD24 You can retrieve blocks from a digitiser in FILING mode by connecting to its terminal interface and issuing DOWNLOAD commands or by transferring the data to a FireWire disk When in FILING mode a digitiser transmits heartbeat messages over its data port These short messages take the place of blocks and ensure that programs such as Scream know that a digitiser is present You can change the frequency of heartbeat messages using the command HEARTBEAT 5 9 3 DUPLICATE Syntax DUPLICATE Instructs the CD24 to transmit all new data directly to clients as in DIRECT mode as well as storing it in Flash memory as in FILING mode If a client
9. 05 0 45 0 1 0 45 0 25 0 45 As can be seen the filter you choose defines the set of permissible sample rates 32 Issue C Operator s Guide The spectral amplitudes for the various frequency responses available are shown in the figures below Hagritude dB ri Ss 1 Fraquanzy Response Osis lower 1 2 Frequency Reeporse 210es lowe 0 1 ei g se 2 u 3 00 3 2 120 7 Frequercy Hz 3 1 3 2 Level Using the Level triggering method a trigger is generated whenever one of the checked components reaches a certain level above the baseline Note All unfiltered seismic signals will have some degree of offset i e the average value will rarely be zero It is strongly recommended that a high pass filter is used to prevent this offset from affecting the level triggering algorithm but please be aware that the high pass filters also affect the main outputs To configure Level Triggering 1 On the Output Control tab set the Highpass filter to 100s 300s or March 2011 1000s to alleviate any offset problems Note that this filter is applied directly to the continuous data streams and so will also affect the main outputs On the Triggering tab select the tap to be triggered from the Data source drop down menu and the channel s to be considered from t
10. 2 tap 3 SET TAPS Sets which components are output under normal conditions and at which tap s tap 0 to tap 3 are integers below 8 whose binary bits represent the Z 1 N 2 and E 4 components respectively Each one sets which components are output at that tap under normal conditions You cannot set tap 0 to output streams March 2011 59 CMG CD24 60 For example if you issue 1 5 7 0 SET TAPS then tap 1 will output only the Z component 1 tap 2 will output the Z and E components 1 4 5 tap 3 will output all three components 1 2 4 7 and tap 4 will not output anything and To set triggered output streams you should use the TRIGGERED command described below 5 4 3 SET CONFIG Syntax SET CONFIG Selects which streams and mux channels are to be output as continuous data for each instrument Two hexadecimal inputs are required as shown below SET CONFIG Hex code to select DSP 1 taps 0000 0000 0070 0000 Hex code to select mux channels 00ff 0307 The 8 digit hex code for the taps is structured as follows ABCD EFGH A Tapo0 on Instrument B B TapO on Instrument A C Tap1 on Instrument B D Tap1 on Instrument A E Tap2 on Instrument B F Tap2 on Instrument A G Tap3 on Instrument B H Tap3 on Instrument A Each component within a tap on an instrument is given a binary value 1 Z 2 N S 4 E W 8 X the auxiliary input present on 4 and 8 channel syst
11. 200 14 41 21 2UUe 19 02 14 41 32 GPS 2 cwer Un Continuous Guralp Systems Ltd DM32 X 7 249 NAGIN ES3100 MG W3420 659100 CMC E 33rd System rc bcot at 2005 1D 02 14 41 21 INTERNAL ID EFFEFSEF FILESTORE C D00C03CFOFO300EF TILESTORE E 4100120 FILESTORE E D0 sd 02 10 200 14 41 2 Tasi Flush MONONCF 2004 09 18 11 10 95 NC GPS 02 10 2006 14 41 41 MUVOJUUEZ N900909C1 Mn dise Tound 2006 19 02 14 41 40 GPS Pcwer On Continuous 02 10 200 14 43 27 MUVOJUUEZ N900909C1 Ma dise found 2006 19 02 14 43 2 GPS cwer On Continuous The system will produce a similar status message whenever it is powered up and whenever you reboot it normally after changing its configuration 3 3 1 GPS If a GPS unit is fitted its operational status is reported on reboot and the behaviour of the time synchronisation software will also be shown From a cold start GPS will initially report No GPS time together with its last position taken from the internal backup All messages from the GPS that involve a change of its status are automatically reported Repeated status messages are not shown to avoid unnecessary clutter This report shows the satellites the system has found and their corresponding signal strengths March 2011 47 CMG CD24 If the system has not been moved from its previous location it should be able to find enough satellites to obtain an accurate GPS time fairly quickly if the GPS receiver has d
12. 23 CMG CD24 TPP server NACTIVE Servers Commard Refresh Conner Block Fiz Control 2004 02 24 11 26 33 WISAStartup suocess v2 0 2004 02 24 12 37 04 eS ACleanup success Reczive UDF Data Pcrt asad fer all neswork comrrunications 1567 2 Right click in the white panel beneath Server and select Add TCP Server 3 Input the IP address of the CD24 followed by a colon and then the output port 10002 For example 192 168 33 2 10002 Click OK 4 After a short wait an entry for the digitiser should appear in the pane Right click on the entry and select Connect 5 If the connection is successful you should see blocks appearing in the Block Rx pane and streams will appear in Scream s main window Close the Network Control window 24 Issue C Operator s Guide 3 Configuration amp Control with Scream Scream distinguishes between configuration and control of digitisers The most important difference is that a digitiser and its attached instrument may be controlled through Scream at any time while it is acquiring data whereas configuration options only take effect after a reboot with consequent loss of data 3 1 The Configuration dialogue To change the configuration of any connected digitiser 1 Locate the digitiser you want to configure All connected digitisers have an entry in the tree on the left of Scream s main window If the digitiser is transmitting data through a remote serv
13. E dl i Mi rn Ni Kh A a vi i ih i a yt IMA HA Ml My ah Adon ei lt i za ie int i e y a AN Mis ful Jen A pie ith wi AG la Jel To start recording new data to a file right click on a stream or a selection of streams and choose Start recording from the pop up menu Recording settings directories etc can be altered by selecting File gt Setup from the main menu and switching to the Recording tab To view status information select the stream and right click to open a pop up menu Select View Status WJ420 659100 4 02 10 2006 ani 41 21 290b 19 UZ 14 40 33 GPS cwer Un Continuous Guralp Systems Ltd DM32 X 7 249 N3470 53100 C G W3420 659100 CMC E 33rd System rc boot at 2005 1D 02 14 41 21 TE mr I D 02 10 200 14 41 20 sl Flush GONONAR 2006 09 18 11 10 25 mc GPS 02 10 2006 14 41 41 MUVODUYEZ MD00D0DC1 Ma dise Tound 2006 19 02 14 41 40 GPS gt cwex On Continuous 02 10 200 14 43 27 MUVODULUZ N900909C1 Mo mse found 2006 19 02 14 43 2 GPS 2cwer On Continuous Issue C Operator s Guide The first few status blocks will consist of the CD24 s start up messages including its software revision number and the data streams selected for downloading and triggering Later blocks give information on the GPS system number of satellites visible the location of the GPS antenna time synchronization status etc and the baud rates in use for each channel For more information o
14. MASSES IAS 70 Sro IRB OI Tei sie cca O AO 70 5 8 Flash storage and Pie oasis cute nda da 70 581 SAOWELAS Laa RARO 70 5 8 2 DOWNLOAD aria sii ii 70 58 3 ALL FLASH A aiii a i Sota eased nee edna E AD alias 72 5 084 ALL TIME S iii A A Aia 73 5 8 5 EROM TIME daa ada 73 5 8 6 LO Ii ie 73 5 8 7 ALLDATA A A EEEE EUA SOAS e E 74 58 8 STREAM AS ion 74 500 STATUS ONLY anio cocaina Nadia 74 58 10 ES RT A PO O II aeaiaen 74 5 8117 RESET LAS H daa 75 5 8 12 HER AS EP Ts siperi ninimo enonsa oae ER RIE ae 75 5 9 Transmission MOE AMA A E EEE ENEE ETE 75 By Oi DIREC Era E EE EA 75 5 9 2 FILING tna i veia ee 75 593 DUPLICATE aaeeea E A A Sesto AEE e a araa 76 A yayeseuagoaeuasnimnmeata AEE EEE EE EERE ei 76 O ADAPTIVE merere on aie eva eer Ea E E EEA a ne tse iii 76 BD PETE O SEE E E awe Coe EEA 76 597 HEARTBEA Parerea e ii yore E E E E A RE E TAS 77 5 98 MS GAP iia RETE 77 5 10 Buffering Modes arias oigan gil RAKI AERONA SERERA ean 78 A A 78 3102 WRITE ONCE dd oca ds 78 5 103 MODE tt 78 5 11 FireWiredisks rs a O a aiiai aa 78 A VER E E E E EAEE 78 A o EE E E OTOES EE alone ees 79 511 3 PU AAA inse ea iios ke o doia KEEA EES 80 511 4 RESETDISO conan ti 80 6 Updating the C24 acia id a iia 81 7 PPP ONGC OS A Ad 84 7A APpendix A Into BlOCKS sica 84 7 1 1 Format of the default information block oonooococnraronronncncnnonarannnnonas 84 7 1 2 Response codes and US pao dais 85 TIAS Example esca dat 86 7 2 Appendix B Setting
15. When building mixed arrays of CD24s and DM24s or digital instruments containing them extra care should be taken with the interconnections Please contact G ralp Systems Ltd technical support for advice March 2011 95 CMG CD24 7 3 Appendix C Connector pinouts 7 3 1 Digitiser connectors 7 3 1 1 POWER DATA GPS port This is a standard 19 pin mil spec plug conforming to MIL DTL 26482 formerly MIL C 26482 A typical part number is 02E 14 19P although the initial O2E varies with manufacturer Suitable mating connectors have part numbers like 14 19S and are available from Amphenol ITT Cannon and other manufacturers External trigger output link oe R common contact for S and T F CTS s External trigger output link normally closed contact G Isolated power 5 V for GPS T Eterna Paige otpa EHON normally open contact H GPS transmit U External trigger input ve J GPS receive V External trigger input ve K GPS PPS AAA Wiring details for the compatible socket 14 195 as seen from the cable end i e when assembling 96 Issue C Operator s Guide 7 3 1 2 FireWire port This is a standard 6 pin mil spec plug conforming to MIL DTL 26482 formerly MIL C 26482 A typical part number is 02E 10 06P although the initial O2E varies with manufacturer Suitable mating connectors have part numbers like 10 06S and are available from Amphenol ITT Cannon an
16. be visible on the network but no data will be sent Channel 1 is normally unused but is exposed on the Power Data GPS connector on the pins identified as Auxilary console Serial data sent to this channel will be converted to TCP and sent over the network on port 10001 please contact G ralp Systems technical support if you wish to make use of this facility In addition to the two data channels you can also access two configuration interfaces via the network a web based configuration system and a console based system The console based system is reached by using telnet to connect to TCP port 9999 If you have problems connecting to the CD24 over a network you can access the configuration menu over a serial link via channel 1 by interrupting the boot process See the following section for instructions For full information about the WiPort NR and WiPort s March 2011 103 CMG CD24 configuration options which are used during the process please refer to the relevant documentation which is available on the Lantronix Web site www lantronix com For the WiPort NR the detailed documentation is at http www lantronix com pdf WiPort NR_UG pdf and for the WiPort the equivalent document can be downloaded from http www lantronix com pdf WiPort_UG pdf 7 4 1 Accessing the configuration menu via the serial Interface Access to the configuration menu over the serial interface can be obtained using Scream or any serial termi
17. can be up to 500 metres away a low power CMG EAM data module might act as an access point for the array elements and forward data onto a higher bandwidth radio link In semi permanent arrays a wireless enabled CMG EAM or laptop PC can be set up as a temporary access point for the duration of a site visit March 2011 9 CMG CD24 2 Setting up the CD24 This section gives an overview of how to set up a CD24 and begin recording data We recommend that you set up a test digitiser in your office or laboratory as a dry run to gain a basic understanding of the system and to check that it is functioning as expected This test installation will use the digitiser s default settings Data will be received using Gtiralp Systems Scream software available from the website www guralp com 2 1 Connectors The CD24 s output connectors are located on the lid The sensor input is located on the side The digitiser can be supplied with a number of options so not all the connectors may be present on your digitiser The input connector is configured to connect directly to one of GSL s sensors and has all the necessary power and control functions All CD24s have a 19 pin mil spec connector on the lid for connection to a supplied breakout box with the following connections a 6 pin socket for connecting the supplied GPS unit a 10 pin plug for connecting to a PC s serial interface or a G ralp data module a 6 pin mil spec plug
18. change the names used for the channels click in the white box containing a Z in the above picture and type a letter or number It will name the channels with a sequence of letters or numbers beginning with the one you choose e g A B C 2 3 4 9 A B unless you type Z in which case they will revert to Z N and E Each combination of channel and tap has two check boxes The upper check box of each pair activates continuous output whilst the lower activates triggered output In the example above the digitiser will output data continuously for all three channels at Tap 2 but never for any other taps If you do not need all the streams to output at all rates you should leave boxes unchecked to save communications capacity You cannot check both continuous and triggered output for the same channel and tap When you enable a triggered stream the digitiser will output data in that stream only when a particular set of trigger criteria are met This is shown diagrammatically as data passing through a switch In the example above we might want the high rate data from Tap 0 to be generated only when an event registers at some other tap To do this tick one or more of the lower set of check boxes for Tap 0 With this configuration uploaded Tap 2 will continue to produce output at all times but Tap 0 will also emit data whenever the trigger 28 Issue C Operator s Guide criteria are met The Triggering button is now shown in red to r
19. console which is also exposed on the power port of the breakout box If you have problems connecting to the CD24 you can attach a 18 Issue C Operator s Guide standard G ralp Systems power data cable to this port and use Scream to access the console 3 Channel 2 port 10002 is connected to the CD24 s digital output unless you have connected a serial data cable from the breakout box to a computer If the breakout box is connected the CD24 will send data streams through that interface rather than to the Wi Port 4 Click on Channel 2 Serial Settings LANTRONIX i aL aseran REAN LYNN Serial Setinga 5 Ifthe Baud Rate is incorrect set it to the default of 19 200 Note If you change the digitiser s output baud rate in Scream or using the terminal you must come back to this page and change the Baud Rate setting here as well 6 The remaining settings can be left at their default values Click OK to save your changes 7 For full information on the Wi Port s configuration options please refer to the Wi Port documentation which is available on the Lantronix Web site www lantronix com 8 When you have finished setting up the Wi Port apply the new settings by clicking Apply Settings The Wi Port will re boot with the new settings in effect Note If the Wi Port is still using an automatically chosen random IP beginning with 169 254 the IP address will change when you do this You will need
20. digitiser appear under Network Local COM1 in the left hand panel of Scream s main window If your PC has multiple serial ports it may appear under some other COM_port name Soon after data streams will begin appearing in the right hand panel Streams with higher sample rates will appear sooner than those with lower sample rates Stream ID Rec Fomat ses End Time Date RIC No 8 bit 0014 48 58 2004 09 24 996 8bit OO 14 48 58 2004 09 24 No 8bit OO 14 48 48 2004 09 24 2153 3 GURALP Div24 1211Kb steam buffer PC Time UTC 1457 12 If this does not happen check all connections and ensure the power supply is providing the correct voltage and current Each data stream has a Stream ID a six character string unique to it Stream IDs normally identify the instrument component and sample March 2011 11 CMG CD24 12 rate of each stream Thus the stream 102622 refers to a Z component stream from instrument 1026 at tap 2 For more details on taps and sample rates see section 3 1 2 page 27 Data streams ending in 00 are status streams containing any extra information sent from the digitiser To view data select a stream and then double click to open a Waveview window You can view several streams at once by holding down SHIFT as you select and then double clicking the selection 2004 08 2416 09 59 HA SS Rh Rah hhh Ao he hh ehh ee Tis wis m KS A ror ase scabs td iii na ish
21. fails to acknowledge a block the digitiser does not attempt to retransmit it 5 9 4 DUAL Syntax DUAL Instructs the CD24 to transmit any continuous streams directly to clients as for DIRECT mode but to store triggered data into Flash storage as for FILING mode If you choose this mode the digitiser will send heartbeat messages in addition to any continuous streams you have configured Scream can pick these up and download new data as necessary 5 9 5 ADAPTIVE Syntax ADAPTIVE Instructs the CD24 to transmit current blocks to clients if possible but to store all unacknowledged blocks in the Flash memory and re send them oldest first when time allows 5 9 6 FIFO Syntax FIFO Instructs the CD24 to begin writing blocks to Flash memory as for FILING but also to transmit data to clients Data are transmitted in strict order oldest first the CD24 will only transmit the next block when it receives an explicit acknowledgement of the previous block 76 Issue C Operator s Guide 5 9 7 HEARTBEAT Syntax interval HEARTBEAT When the CD24 is in FILING mode it outputs status messages periodically over the RS232 port This command changes how often these messages are produced interval is measured in units of 30 ms For example issuing 600 HEARTBEAT will cause the CD24 to output heartbeat messages every 600 x 30 18000 ms 18s If you connect to a digitiser in FILING mode using Scream S
22. is suitable pins A and B power supply input are connected to individual power supplies as normal and March 2011 93 CMG CD24 the remaining data pins are connected to your recording equipment as normal Digitiser or digital instrument Trigger action Trigger generator Digitiser or digital instrument Digitiser or digital instrument on E 94 Issue C Operator s Guide The diode between pins A and R is important because if two digitisers generate a trigger simultaneously their power supplies will both be connected via the internal relay contacts to the common trigger line on pins V and hence connected together This can cause considerable current flow with consequent risk of fire as well as severe damage to equipment and cables In the case where a single power supply is used to power all of the equipment this is not an issue and pin A should be connected directly to pin R on all units The more common case where each unit has it s own power supply is shown above Please note that all the power supply s ground terminals will be connected together they must therefore have floating outputs or grounded negative terminals 7 2 5 Combining CD24 and DM24 digitisers in a single array The trigger inputs of a CMG DM24 digitiser are slightly different to those on a CD24 the return pin on the DMG DM24 is connected internally to the power supply ground it is isolated on the CD24
23. name Files of type z Cancel 4 March 2011 81 CMG CD24 82 Firmware updates for the CD24 normally have filenames like upper 122 hex Choose the latest file and click Open If the file opens successfully Scream will show the progress of the upload f ternal TAT o00z4T10 El nanzeran DODZ I ZO Sending file E UUUZ LU iZ E oooz4rso S o00Zz4LEO mn 21 000Z lt LTO ES oo0z lt rro Elapsed 00 28 Kb ses 0003 lt E10 Rerraining 01 4 00024530 DOOZ4EEO 00024570 nnnz lt ren DOOZ EEO VUUZ LLU DOOZ EFO 0002 lt F10 cm a Depending on the speed of the link it may take up to 20 minutes to transfer the firmware When the transfer completes type re boot to restart the CD24 B Terminal ici x ULUS Bac a ocos6BcC OCO36BzC 0coz6z0c OCo3622C 0C1F5378 OCFO473B oc380628 OcBS52650 OCrro300 OCFFOJOO OCFFOI00 OCFFOJOO ck OCOOO17F ok 1 Guralp Systems Ltd IM32 5P v 115 rk rE pOI E i Terminal Session closed by instrument Allow 30 seconds for the digitiser to restart Right click on the digitiser s icon in Scream and select Configure Check that the Software Version corresponds to the version you have just uploaded Issue C Operator s Guide 7 To check that the digitiser boots correctly after a cold start you may wish to power cycle the device March 2011 83 CMG CD24 7 Appendices 7 1 Appendix A InfoBlocks Th
24. of data to output from before a trigger is declared 5 5 11 POST TRIG Syntax time POST TRIG Sets the post trigger recording time time is the number of seconds of data to output after a trigger condition lapses If an event persists for some time all triggering components must fall below the threshold before the trigger condition will lapse only then will the post trigger period begin 5 5 12 TRIGGERIN Syntax TRIGGERIN ENABLE TRIGGERIN DISABLE Enables or disables external trigger input in digitisers equipped with this option Enabling external trigger input allows you to trigger the CD24 from an external logic level supplied through its digital output port This voltage can be between 5 and 10 V supplied between the Trigger In pin and signal ground If the CD24 is triggered externally it will behave exactly as if it had generated the trigger itself 5 5 13 TRIGGEROUT Syntax TRIGGEROUT ENABLE TRIGGEROUT DISABLE Enables or disables external trigger output in digitisers equipped with this option 66 Issue C Operator s Guide Enabling external trigger output allows you to trigger other equipment through a relay contained within the CD24 whenever it triggers The CD24 s digital output port contains two pins Trigger out common and Trigger out normally open which are connected when it triggers In particular you can connect a second digitiser with TRIGGERIN ENABLE in effect in which case triggered data fro
25. take effect immediately are given below 3 2 5 1 DIRECT Syntax DIRECT Instructs the digitizer not to use Flash memory for storage Instead all data is transmitted directly to clients A digitiser in DIRECT mode still honours the GCF Block Recovery Protocol a temporary RAM buffer always holds the last 256 blocks generated and if a client fails to receive a block it can request its retransmission If you expect breaks in communication between the digitiser and its client to last more than 256 blocks or if you want the digitiser to handle breaks in transmission rather than relying on the client to request missed blocks you should use ADAPTIVE mode if you want data to stay as near to real time as possible but do not mind if blocks are received out of order or FIFO mode if you need blocks to be received in strict order but do not mind if the digitiser takes a while to catch up to real time 3 2 5 2 FILING Syntax FILING Flash storage Instructs the CD24 not to transmit blocks to clients automatically but to store all digitised data in the Flash memory If you have chosen the RECYCLE buffering mode see below the memory is used in circular fashion i e if it becomes full incoming blocks begin overwriting the oldest in memory If the WRITE ONCE mode is active the digitiser will switch to DIRECT mode see above when the memory becomes full Issue C Operator s Guide You can retrieve blocks from a digit
26. z0 2300000 M ng 3 fio G M nv 3300000 reaf ho fe M E 2 3300000 I Comeon vaes I Comenon values Enable External Trigge Input Pre Trigger seconds 5 aj Enable External Trigger Output Post Trigger seconds 10 2 Y UPLOAD X Cancel Heb The CD24 can be set up for triggered output that is to output certain data streams only when a particular trigger criterion is met The trigger criterion can be tested with data from the same or some other stream For example you could use a later tap with a lower sample rate as a trigger for output from an earlier more detailed tap Scream 4 and above also allows you to configure each digitiser to receive triggers from other digitisers March 2011 29 CMG CD24 To create a new stream with a trigger open Scream s Digitiser configuration window for the relevant digitiser and click on the Output control tab In the Output control pane a tap which gives rise to a triggered stream has a tick in the lower row of its grid of check boxes You cannot configure the trigger criteria until you have selected at least one stream to be affected by the trigger Once you have decided which streams should be output when the trigger is activated you will be able to click on the Triggering button to describe the trigger condition Alternatively click on the Triggering tab at the top of the window Either action will open the Triggering pane There are two triggering algorithms which G ralp
27. 0 7 3 2 Breakout box connectors 7 3 2 1 Breakout box data port This is a standard 6 pin mil spec plug conforming to MIL DTL 26482 formerly MIL C 26482 A typical part number is 02E 10 06P although the initial O2E varies with manufacturer Suitable mating connectors have part numbers like 10 06S and are available from Amphenol ITT Cannon and other manufacturers Pin Function A RS232 transmit B RS232 receive CSE RTS D CTS E not connected F Isolated ground Wiring details for the compatible socket _10 06S as seen from the cable end i e when assembling Issue C Operator s Guide 7 3 2 2 Breakout box GPS port This is a standard 6 pin mil spec socket conforming to MIL DTL 26482 formerly MIL C 26482 A typical part number is 02E 10 06S although the initial O2E varies with manufacturer Suitable mating connectors have part numbers like 10 06P and are available from Amphenol ITT Cannon and other manufacturers Pin Function A Isolated ground B RS232 receive from GPS C RS232 transmit to GPS D PPS E not connected F Power 12 V Wiring details for the compatible plug 10 06P as seen from the cable end i e when assembling March 2011 101 CMG CD24 7 3 2 3 Breakout box power port This is a standard 10 pin mil spec plug conforming to MIL DTL 26482 formerly MIL C 26482 A typical part number is 02E 12 10P altho
28. 11 5 CMG CD24 1 Introduction The CD24 is a compact very low power multi purpose digitiser with three 24 bit differential inputs and 8 lower speed single ended auxiliary inputs Equipment with analogue outputs connects to the CD24 via a 26 way mil spec connector WIFi ANTENNA O y gt GURALP SYSTEMS CD24 S3 Key features include e 24 bit sigma delta analogue to digital converters e Low power lt 1W from 10V 28V DC e 10V balanced differential input lines e Lightweight and waterproof e RS232 output in GCF G ralp Compressed Format e Multiple user configurable output rates 6 Issue C Operator s Guide Once connected to 10 28 V DC power the CD24 will begin operating automatically digitising its inputs and either outputting digital data to your own recording system or saving them to internal Flash memory 1 0 1 State of health information The CD24 constantly monitors the status of the GPS and timing systems outputting information in a plain text status stream An electronic thermometer also provides regular measurements of the unit s internal temperature which are reported in the same stream The thermometer is calibrated to an accuracy up to 0 33 C with a linearity of 0 5 C 1 1 Options 1 1 1 Storage and interfaces The CD24 can be supplied with up to 16 Gb of internal Flash memory for data storage The amount you need will depend on the length of your ex
29. 3 and mm is the minute of the hour 0 59 5 8 6 TO TIME Syntax yyyy mm dd hh mm TO TIME Instructs the CD24 to transmit only data earlier than yyyy mm dd hh mm where yyyy mm dd hh and mm have the same meanings as in FROM TIME above You can combine FROM TIME with TO TIME to download data from a specific time window When a TO TIME download completes the read pointer will be moved to the end of the downloaded data The old position of the read pointer is forgotten so issuing ALL TIMES may transmit data you have previously downloaded March 2011 73 CMG CD24 5 8 7 ALL DATA Syntax ALL DATA Instructs the CD24 to transmit all the data streams it holds next time a DOWNLOAD is issued This command does not alter the read pointer or specify a time period 5 8 8 STREAM Syntax STREAM stream id n b Instructs the CD24 to transmit only the stream with ID stream id Stream IDs are normally a 4 character device code e g HPAO followed by a component letter N and a tap number 1 Unlike most FORTH commands the stream id parameter goes after the command The read pointer will be moved to the end time of the download so a subsequent ALL TIMES DOWNLOAD will not transfer any other streams that were recorded during this period To retrieve these streams you will have to specify the time period explicitly with FROM TIME and TO TIME if necessary or download all stored data with ALL FLASH 5 8 9 STATUS ON
30. ASSES Displays the current instantaneous position of the three sensor masses in counts range 8 000 000 masses z position n s position e w position ok 5 7 5 RE BOOT Syntax RE BOOT Causes the CD24 to reset Some configuration changes will only take effect after you have rebooted the digitiser 5 8 Flash storage and filing 70 5 8 1 SHOW FLASH Syntax SHOW FLASH Reports status information about Flash memory in the CD24 For example SHOW FLASH for a new system with 8 x 64Mb chips fitted show flash FILESTORE C 0000FFFFO0000000 FILESTORE K 1048160 Last Flush CHIP 1 OOOOFFFF Last write CHIP 35 00000FF8 ok The first two lines display internal diagnostic information whilst the last two lines describe the position in Flash where data was last flushed and where data was last written 5 8 2 DOWNLOAD Syntax DOWNLOAD but see below Sets up a data transfer from the Flash memory over the serial connection direct to SREAM or other software SCREAM Can be configures to auto record data Refer to the manual for more information Issue C Operator s Guide The flash memory is used as a ring buffer Two pointers into the memory keep track of where data were last read the Read Pointer and last written the Write pointer When either pointer reaches the end of physical memory it wraps round back to the beginning The behaviour when the write poi
31. E A T E E EE 55 T ld dad 55 5 2 9 TEMP Posa atinada aaa i EA EIA EA RA AA AAA ica 56 D20 ETHER abi oia 56 5 3 GPRS AMOS iS a neabinscnamrnenenes 56 A E A E tay oie 56 5 3 2 HR OG CE Dr SE ee ann en eno ne Re RC 56 5 33 AGES at gn gah vce ccc enn Sater po ibe Ved bg bu ich do aieh AAV ped RCP enna eaa a ae iera 57 534 SETAR T Goel ener teas Rae ala ooh thie ieee ae 57 5 30 SET GLOCK iii 57 So II ia 58 573 7 LEAPSEGOND url ANA enero 58 530 ORATORIA ea di 58 5 4 Oiitput COnNTGUPAHON plo dro 59 DAT SAMPLES SEG iia 59 E A A O ties 59 D43 SET CONTI da 60 54 4 COMPRESSION did 62 Deo bayet ia i te EAE 63 B57 TRIGGERS it io oi bid 63 5 92 TRIGGERED ip pb 63 A RO 64 A E P Ka E A A E E 64 5 001 RATIO Seara aid 64 5 5 6 BANDA Sarai A ias 65 5 0 7 MIGK OG wos tavtevsvnteteauatatenti cats a aaa e a E aaa a a aaa aa 65 559 MICRO G e a e a a EEE A 65 5 5 9 HIGHPAS S 1d RA ARA 65 5 940 PRETR IC N R Eaa 66 OL BOSTON AA es 66 5 50 12 TRIGGER IN tt e RA RA AT A ER Ed 66 Sd TRIGGEROU tai a AA cine de aos 66 5 6 CAIDO rad A it Ria 67 ASIN PANA VE ia 67 LA A ee te allah 3 67 5 6 3 RA NDO MGA E Ariana aair ioeie 68 DEP MINUTE dia 68 5 65 DOA MPL UT UIE ii ba 69 A jenibadsvaubonapeunaaapneyesanvesanenenenines 69 Fl CENTRE nro ae a la cal i tt rina cate a a Suite teehee ean Aton es Auer ns 69 5 7 2 YORU TO GCEN TRE aaron nana a eso i ee Enea eE aA e E aR aia 69 March 2011 3 CMG CD24 573 RESP oreinaren ae E E O A antes A T E e Ei 69 574
32. LY Syntax STATUS ONLY Instructs the CD24 to transmit only status streams text streams normally with stream IDs ending in 00 The read pointer will be moved to the end time of the download so a subsequent ALL TIMES DOWNLOAD will not transfer any data streams that were recorded during this period To retrieve these streams you will have to specify the time period explicitly with FROM TIME and TO TIME if necessary or download all stored data with ALL FLASH 5 8 10 S S Syntax rate S S Instructs the CD24 to transmit only streams with sample rates equal to rate If rate is zero only status streams are transmitted The read pointer will be moved to the end time of the download so a subsequent ALL TIMES DOWNLOAD will not transfer any other streams 74 Issue C Operator s Guide that were recorded during this period To retrieve these streams you will have to specify the time period explicitly with FROM TIME and TO TIME if necessary or download all stored data with ALL FLASH This command should not be confused with the SAMPLES SEC command 5 8 11 RESET FLASH Syntax RESET FLASH Resets the Flash memory pointers so that both point to the start of physical memory The CD24 will start overwriting old data from the beginning of memory You can still access these data if they have not been overwritten 5 8 12 ERASEFILE Syntax ERASEFTILE interactive Clears the entire Flash memory When you issue this command
33. O to start transferring data 2 5 1 Reading CD24 disks The CD24 uses a special disk format DFD for recording data This format is also used by other G ralp digitisers such as the DM24 You can read these data into a PC using Scream or the Windows gcfxtract utilities which are freely available from the G ralp Systems web site Linux and Solaris command line utilities are also available for reading data from a DFD disk The DFD format is not the same as that used by the G ralp Systems EAM data module which uses either a FAT32 compatible journalling file system or an ext3 file system G ralp Systems can provide fully tested disks with FireWire and USB connectors Alternatively a third party FireWire disk may be used although compatibility is not guaranteed 2 5 1 1 Reading CD24 Disks using SCREAM To read a disk with Scream 1 Attach the disk to your computer You can use FireWire USB or any other interface supported by your computer and the disk 2 Run Scream and select File gt Setup from the main menu Select the Files tab 3 Set the Base Directory Filename Format and Data Format as described above Also if required set the Post processor and Granularity options to your preference Consult the Scream documentation for details Issue C Operator s Guide 4 Select the Recording tab and check both Auto Record Enable for Data Streams and Auto Record Enable for Status Streams Click OK Scre
34. See section 3 2 5 on page 40 for more details Issue C Operator s Guide 2 5 Downloading data over FireWire The easiest way to download data over FireWire is to connect a suitable disk to the FireWire port of the CD24 and power cycle the unit If you have ordered a CD24 with the powered FireWire option you can attach the disk directly to the CD24 with no additional connections Otherwise you will need to connect the disk to a power source through the supplied adapter When the digitiser restarts it will automatically detect the disk and flush all new data to it If you do not want to restart the digitiser you can also flush data to disk manually 1 Open the digitiser s console To do this using G ralp Systems Scream software right click on the digitiser s icon once it appears and select Terminal If you are using a G ralp EAM issue the command minicom n port number 2 Connect a suitable disk to the FireWire port of the CD24 Provide power for the disk if necessary March 2011 21 CMG CD24 22 3 Issue the command FLUSH This will download all data from the CD24 that it has not already transferred If you want to transfer the entire contents of Flash memory use the command FLUSHALL For more details see section 5 11 3 on page 80 4 Close the terminal session If you are using Scream or an EAM the CD24 should start transmitting immediately Otherwise you may need to issue the command G
35. V per count as given on the digitiser calibration sheet Older CMG 5TD instruments do not have calibration input facilities and thus CALVPC can be omitted GRAVITY The local acceleration due to gravity at the installation site in ms This field is used by Scream to display streams in physical units By default a standard average g value of 9 80665 ms is used but this field can be changed for greater accuracy if desired TYPE The model number of the instrument used for optional display purposes RESPONSE A string describing the theoretical response of the instrument in the form response type unit See the table below for the correct values 7 1 2 Response codes and units Instrument description Response type CMG 3T 30s 50Hz CMG 3 30S 50HZ Vel CMG 3T 60s 50Hz CMG 3 60S 50HZ CMG 3T 100s 50Hz CMG 3_100S_50HZ Vel March 2011 85 CMG CD24 Instrument description Response type OOOO OOOO Ola A i MG 6T MG 6T MG 6T i MG 6T MG 3TB 30s 50Hz Vel MG 3TB MG 3TB MG 3TB 360s 50Hz MG 40T 305 50H MG 40T 609 50 MG 40T 100s 50Hz e 100s 50Hz 120s 50Hz CMG 3B 120S 50HZ CMG 3B_100S_50HZ CMG 3B_360S_50HZ Vel i MG 5T DC 100H c 2s 100Hz CMG 6 2S 100HZ CMG 6 10S 100HZ 30s 100Hz CMG 6 308 100HZ Ve 10s 100Hz 1s 100Hz CMG 6 1S 100HZ _25_ ala 7 1 3 Example files The calibration information for a CMG 3T weak motion velocity sensor mig
36. Y is a free terminal package for windows which is useful if HyperTerminal is not available It can be downloaded from www chiark greenend org uk The easiest package to use is the windows installer Install PuTTY by following the on screen instructions Start PuTTY by clicking on the desktop icon or Start menu entry and using the Connection type radio buttons on the right hand side of the screen select the Serial option The dialogue will change to allow you to specify the serial port and the line speed Enter the name of the correct serial port and type 9600 in the Speed field 110 Issue C a ES PuTTY Configuration Category B Session Logging Terminal i Keyboard Features B Window Appearance Behaviour Translation Operator s Guide Basic options for your PuT TY session Specify the destination you want to connect to Serial line Speed Connection type OBa OTelnet ORlogin OSSH Load save or delete a stored session Saved Sessions Selection i Colours Connection Load Save Delete Close window on exit O Always O Never Only on clean exit Now click on Serial at the bottom of the category menu on the left X PuTTY Configuration Category E Session Options controlling local serial lines Logging Terminal Keyboard Serial line to connect to COM1 Bell Features Window Appearance Behaviour Translation Stop bits Selecti
37. a rate it will take some time to catch up with the real time data after an outage If you want data to be transmitted in real time where possible but are worried about possible breaks in communication you should use ADAPTIVE mode instead Issue C Operator s Guide FIFO mode will consider a data block successfully transmitted once it has received an acknowledgement from the next device in the chain If there are several devices between you and the digitiser you will need to set up the transmission mode for each device if applicable to ensure that data flow works the way you expect Like all the transmission modes FIFO mode does not delete data once they have been transmitted You can still request anything in the Flash memory using Scream or over the command line The only way data can be deleted is if they are overwritten in the RECYCLE buffering mode see below or if you delete them manually 3 2 5 5 ADAPTIVE Syntax ADAPTIVE not acknowledged not acknowledged Flash storage Instructs the CD24 to transmit current blocks to clients if possible but to store all unacknowledged blocks in the Flash memory and re send them oldest first when time allows ADAPTIVE mode is best suited for real time installations where the link between digitiser and client is intermittent or difficult of access If the communications link is only marginally faster than the data rate it will usually be busy transmitting real time d
38. ace it switches to DIRECT transmission mode and will leave the Flash memory untouched 5 10 3 MODE Syntax MODE Displays the current buffer usage mode RE USE Circular WRITE ONCE Write Once 5 11 FireWire disks 78 5 11 1 DIR Syntax DIR Displays the contents of the FireWire disk as a directory listing dir NO0000002 V31333934 Logon0000C000 00000000 T00000000 00100000 0000FFC1 FW INIT DISKSIZE K 60051600 STREAM start finish length 620600 18 2002 12 13 15 08 50 2096304 2001 01 C5 04 43 24 2096288 Diskfree sectors 118006880 Diskfree MB 57620 ok Issue C Operator s Guide The first lines give general status information about the storage available followed by the directory itself notably N00000002 the number of devices connected to the hub here 2 FW INIT denotes that the disk was successfully mounted DISKSIZE K 60051600 the size of the device in kilobytes 620600 the stream ID of the sensor 18 the starting cluster number 2002 12 13 15 08 50 the date and time of the earliest block in memory 2096304 the end cluster number 2001 01 C5 04 43 24 the date and time of the latest block in memory 2096288 the total number of clusters of data held If there is no disc connected or the cable is faulty you will see the message FW Ierr i e input output error 5 11 2 FLUSH Syntax FLUSH Starts transferring data from Flash m
39. ally GPS receivers with the latest firmware do not suffer from this problem To find out whether SQPATCH is currently enabled issue the command SQPATCH 58 Issue C Operator s Guide 5 4 Output configuration 5 4 1 SAMPLES SEC Syntax tap 0 tap 1 tap 2 tap 3 samples sec The DSP software on the CD24 supports up to 7 cascaded filter decimation stages Each stage can be set to one of three decimation factors which divide the sample rate by 2 4 or 5 Decimation factors of 8 and 10 are also available which the CD24 produces by combining two decimation stages As a result data can be output at up to 4 concurrent data rates These configured output stages are called taps The ADC within the unit outputs data at 2000 samples s so taps can have sample rates between 1 and 1 000 samples s The arguments tap 0 to tap 3 are the sample rates at each tap in turn starting with the highest You must ensure that each rate is lower than the previous one by a factor of 2 4 5 8 or 10 Non integer values are not allowed For example 1000 250 125 25 samples sec 500 100 5 1 samples sec 200 100 20 4 samples sec 400 40 20 10 samples sec As long as you specify the initial taps you can omit later ones The command fills in the value of the missing taps using a decimation factor of 2 where possible Thus the following commands are equivalent 400 40 20 10 samples sec 400 40 samples sec 5 4 2 SET TAPS Syntax tap 0 tap 1 tap
40. am will remember the recording options you set in steps 3 and 4 for later occasions 5 Select File gt Read SCSI disk from the main menu Scream will search for attached disks and open a window with a list of all the streams it has found 6 Select the streams you want to replay and click Open The disk will appear in the left hand pane of Scream s main window and the streams you have selected will start playing into the stream buffer as well as being recorded 7 When you have finished transferring the data if you want to reset the disk select File gt Reset SCSI disk from Scream s main menu Select the disk you want to reset and click OK 2 6 Receiving data in Scream There are several ways a CD24 digitiser can be connected to Scream A direct serial connection can be made from the breakout box to your computer This is the method we recommend for testing the digitiser see section 2 2 on page 10 The serial port can also be used to connect an external modem Details of how to connect modems are available on the G ralp Systems Web site Data can be received from the digitiser over the optional Ethernet or wireless links Before you can do this you will need to set up its IP address and network configuration as described in section 2 3 on page 13 To connect to a CD24 over the network 1 Run Scream and select Windows Network Control from the main menu Click on the My Client tab March 2011
41. an regardless of the configuration of any devices between you and the digitiser 3 2 5 3 DUPLICATE Syntax DUPLICATE March 2011 43 CMG CD24 44 Flash storage Instructs the CD24 to transmit streams directly to clients as well as storing all data into Flash storage as for FILING mode A digitiser in DIRECT mode still honours the GCF Block Recovery Protocol a temporary RAM buffer always holds the last 256 blocks generated and if a client fails to receive a block it can request its retransmission If you expect breaks in communication between the digitiser and its client to last more than 256 blocks or if you want the digitiser to handle breaks in transmission rather than relying on the client to request missed blocks you should use ADAPTIVE mode if you want data to stay as near to real time as possible but do not mind if blocks are received out of order or FIFO mode if you need blocks to be received in strict order but do not mind if the digitiser takes a while to catch up to real time 3 2 5 4 FIFO First In First Out Syntax FIFO Flash storage not acknowledged Instructs the CD24 to begin writing blocks to Flash memory as for FILING mode but also to transmit data to clients Data are transmitted in strict order oldest first the CD24 will only transmit the next block when it receives an explicit acknowledgement of the previous block If the communications link is only marginally faster than the dat
42. ansmitted over a link with a given bandwidth However compressing streams uses processor power and can increase data latency The digitiser compresses data without loss so compression is most effective when the data contain relatively little information In most cases when a seismic event occurs the digitiser will need to decrease the compression level bits can be one of 8BIT 16BIT and 32BIT 8BIT the default is the maximum amount of compression 32B1T denotes no compression size determines the maximum number of data samples in a GCF block This must be between 20 and 250 the default is 250 GCF blocks must be a whole number of seconds long If you set size to a very small value so that size samples is less than 1 second for some streams the digitiser will output 1 block every second for those streams ignoring the value of size Thus if you issue 32BIT 20 COMPRESSION streams with a sample rate of 20 samples s and higher will output one block per second Issue C Operator s Guide whilst lower rate streams will output 20 sample blocks every 5 seconds for 4 samples s data etc The special value NORMAL COMPRESSION returns the setting to its default value and is equivalent to 88IT 250 COMPRESSION 5 5 Triggering 5 5 1 TRIGGERS Syntax components TRIGGERS Selects which component or components can generate a trigger Only these components will be examined by the triggering algorithm components is an in
43. arch from the menu system to find the sensor with its new IP address Note The IP address of the digitiser must have be on the same subnet as the computer you want to connect to The LAN setting on the DevicelInstaller device tree identifies the IP address of your computer The first three number groups typically need to be the same on all devices digitisers and computer 14 If you want to configure the CD24 to use a static IP address use the Assign IP wizard as above and click Search again March 2011 15 CMG CD24 15 Double click on the entry which corresponds to the CD24 you want to configure The right hand panel will change to show the current properties of the device Bis antronxieviretnatndina 4 11 11 x Fk fer Yew Peete Tk Heh Pee aeh Gade pints Desire Reve web Lin yaan lend a ci Ie Hades Adora Fiera Vert cn Urr lyy 16 Switch to the Web Configuration tab and click Go to open the Web configuration interface Be anman teviretnatniies 4 111 111 x Fle Fr vew her mk Hep Pee Srah Mage Tr prh gt Azee sews the Lie A ude ot Ihe dzone 17 You can also click Use External Browser to use your own Web browser to configure the system 18 Follow the steps at 2 3 3 to configure the module from its Web interface 2 3 2 Using DHCP If you cannot install Devicelnstaller on your PC or you do not wish to you can also get access to the CD24 using a standard DHCP server I
44. ass filter can be changed with the BANDPASS command filter 1 creates a filter with a corner at 10 of the Nyquist frequency for tap tap i e 5 of its sample rate filter 2 creates a filter with a corner at 20 of the Nyquist frequency for tap tap i e 15 of its sample rate filter 5 creates a filter with a corner at 50 of the Nyquist frequency for tap tap i e 25 of its sample rate 5 5 7 MICROG Syntax level MICROG Sets the output level above which a trigger will be declared when using the LEVEL triggering algorithm level is interpreted in counts To interpret in ground units use MICRO G 5 5 8 MICRO G Syntax level MICRO G Sets the output level above which a trigger will be declared when using the LEVEL triggering algorithm level is interpreted in ground units ug if there is a correctly populated infoblock calvals otherwise the level will be interpreted in counts see MICROG 5 5 9 HIGHPASS Syntax filter HIGHPASS Instructs the digitiser to pass the stream s which generate LEVEL triggers through a high pass filter before examining them filtercan be March 2011 65 CMG CD24 1 for a 100 s high pass filter 2 for a 300 s filter 3 for a 1000 s filter or 0 to disable the high pass filter Note that this filter will affect the data being output as continuous streams 5 5 10 PRE TRIG Syntax time PRE TRIG Sets the pre trigger recording time time is the number of seconds
45. ata Thus it may take a while for the digitiser to work through the missed blocks In this case and if your client supports it you may prefer to use the Block Recovery Protocol to request missed blocks where possible Some software packages most commonly Earthworm cannot handle blocks being received out of time order If you are using such a package ADAPTIVE mode will not work and may crash the software 3 2 5 6 DUAL Syntax DUAL March 2011 45 CMG CD24 46 continuous streams triggered streams Flash storage Instructs the CD24 to transmit continuous streams directly to clients as for DUPLICATE mode but to store triggered data only into Flash storage If you choose DUAL mode but do not select any continuous streams for output the digitiser will send heartbeat messages as for FILING mode Scream can pick these up and download new data as necessary 3 2 6 Buffering modes 3 2 6 1 RE USE RECYCLE Syntax RE USE Instructs the CD24 to carry on using the current filing technique when the Flash memory becomes full overwriting the oldest data held This buffering mode is called RECYCLE in Scream and on the DCM For example in DUAL mode with RECYCLE buffering the latest continuous data will be transmitted to you as normal and the latest triggered data may be retrieved from the Flash memory using Scream or the command line However if you do not download data regularly from the Flash memory you may lose
46. ber uf FFTs lu average over 8192 Serial Number optioral Most data can be found on the calibration sheet for your sensor Under Instrument response you should fill in the sensor response code for your sensor according to the table below Instrument Type should be set to the model number of the sensor If the file calvals txt exists in the same directory as Scream s executable scream exe Scream will look there for suitable calibration values See the Scream manual for full details of this file Alternatively you can edit the sample calvals txt file supplied with Scream 11 Click OK The script will return with a graph showing the responsivity of the sensor in terms of amplitude and phase plots for each component if appropriate March 2011 51 CMG CD24 52 The accuracy of the results depends on the amount of data you have selected and the sample rate To obtain good quality results at low frequency it will save computation time to use data collected at a lower sample rate although the same information is present in higher rate streams they also include a large amount of high frequency data which may not be relevant to your purposes r B Broadband Noise Calibration He EP A IEEE IKNUZ Mx3 Type 3T Response 360s velocity pore 1 H i 10 Magn tuce 4B Phase cegi 107 10 10 10 Arecuency Ho ot The calibration script automatically performs app
47. ch data streams are sent to Scream from the digitiser W3420 DM32 6X Configuration Setup y ioj x System ID fi ntrol Triggering Mux Channels Ports TETS March 2011 27 CMG CD24 The CD24 initially samples incoming data at 2000 Hz These data are then filtered and reduced to a lower rate decimated using an on board digital signal processing unit or DSP The DSP has several filtering decimation stages which run one after the other Stages which can produce output and the outputs from those stages are called taps The CD24 can output 4 taps simultaneously Each configurable tap can be set to a different decimation factor by choosing values from the drop down menus on the left Decimation factors of 2 4 5 8 and 10 are available The numbers visible in the drop down menu of each tap are the data rates that each of the possible decimation factors will provide given the settings of the taps above it Only integer Hz data rates are allowed thus for example if one tap emits data at 25 Hz the only possible further decimation factor is 5 To the right of each decimation factor menu is a grid of check boxes These boxes mark which streams of data to generate at each sample rate The screen shot above shows a possible configuration for a triaxial instrument Every channel of the digitiser may be output at any tap currently as illustrated all three axes are being output at Tap 2 20Hz If you want to
48. cream will not detect the digitiser until it has sent a heartbeat message Therefore you should use a relatively short heartbeat interval if you have a continuously connected digitiser 5 9 8 MS GAP Syntax interval MS GAP Sets the interval the digitiser should wait for a GCF ACK acknowledged message before assuming that the block could not be transmitted If a period of interval passes without an acknowledgement the digitiser s behaviour depends on the current transmission mode see above interval is measured in milliseconds The default is 150 If the value is greater than the average time between blocks being generated and an outage occurs in the return communications link the digitiser will be producing data faster than it can transmit them and gaps will start to be observed However systems using slower communications links e g radio links may be unable to acknowledge blocks in under 150 ms You should choose a value for interval which is suitable for your particular installation March 2011 77 CMG CD24 5 10 Buffering Modes 5 10 1 RE USE Syntax RE USE Instructs the CD24 to use its Flash memory as a circular buffer overwriting the oldest data when it becomes full In this mode the Flash memory will always contain the latest data 5 10 2 WRITE ONCE Syntax WRITE ONCE Instructs the CD24 not to overwrite data in the Flash memory when it becomes full Instead when the digitiser runs out of sp
49. d E W Mass Position Mux channels appear as M8 M9 and MA respectively 3 1 5 Ports The Baud Rates pane of the Configuration setup window allows you to program the baud rate and stop bits for the CD24 s output port If you have a CD24 with Ethernet or Wi Fi options the settings you configure here are used both on the standard data output port and on the internal port which sends data to the Ethernet Wi Fi module If you change them you will also need to configure the Ethernet Wi Fi module to receive data with the new settings This can be done using the Lantronix Devicelnstaller utility see section 2 3 on page 13 tm 13A21 C954 DM32 6X Configuration Setup Le System ID Output Control Triggesing Mux Channels Ports 115200 y TwRixrate 1 Stop Bis Y UPLOAD f X Cancel Pier The baud rate you choose must satisfy two conditions It must be high enough to allow the transmission of all data generated by the digitiser at the sampling rates you have chosen For three streams of data at 100 Hz for example 9600 baud will usually be sufficient If you wish to transmit 200 Hz data however the baud rate must be at least 19200 It must be low enough to fit within the operating range of the telemetry equipment you are using While modern modems often offer transfer rates up to 56kbaud the telephone or transmission lines may not support these rates The same holds true for radio telemetry
50. d other manufacturers Wiring details for the compatible socket _10 06S as seen from the cable end i e when assembling March 2011 97 CMG CD24 7 3 1 3 Ethernet port Digitisers with the Wi Fi and Ethernet networking options have an additional 6 pin mil spec plug 02E 10 06P for this interface This is a standard 6 pin mil spec plug conforming to MIL DTL 26482 formerly MIL C 26482 A typical part number is 02E 10 06P although the initial O2E varies with manufacturer Suitable mating connectors have part numbers like 10 06S and are available from Amphenol ITT Cannon and other manufacturers e E Data receive ve RJ45 pin 6 F Data transmit ve RJ45 pin 2 Wiring details for the compatible socket _10 06S as seen from the cable end i e when assembling 98 Issue C Operator s Guide 7 3 1 4 Sensor input This is a standard 26 pin mil spec plug conforming to MIL DTL 26482 formerly MIL C 26482 A typical part number is 02E 16 26P although the initial O2E varies with manufacturer Suitable mating connectors have part numbers like 16 26S and are available from Amphenol ITT Cannon and other manufacturers Power 10 to 24 V Optional N Signal ground 2VDC Wiring details for the compatible socket _16 26S as seen from the cable end i e when assembling March 2011 99 CMG CD24 10
51. digitisers can use However not all models can use both methods Scream will find out from the digitiser whether its on board software supports each method 3 1 3 1 STA LTA The STA LTA algorithm applies a simple short term average long term average calculation to the triggering stream It works by identifying sections of an incoming data stream when the signal amplitude increases The purpose of taking a short term average rather than triggering on signal amplitude directly is to make it less likely that spurious spikes will trigger the device Averaging also introduces an element of frequency selectivity into the triggering process You can select which tap is tested for the trigger from the Data source drop down menu The tap does not have to output data to Scream for you to be able to use it here Any or all of the channels available at that tap may be used to determine a trigger You can select which channels are considered by checking the boxes in the Channel column of the table If any of the checked channels passes the trigger condition the trigger will activate and will not detrigger until all of the checked channels have fallen below their respective ratio values The STA and LTA columns allow you to set the intervals over which the two averages are calculated in seconds Typically the time interval for the short term average should be about as long as the signals you want to trigger on while the long term average s
52. direct to the CD24 using the command line tools data terminal and adc command For more information please see the manual for the EAM If you have problems connecting to the digitiser s console you should check that the serial port s options and baud rate are set correctly in Scream or your terminal program As supplied the CD24 expects connections at 19200 baud with 8 data bits no parity bit and 1 stop bit No flow control is used 5 1 FORTH The CD24 uses a FORTH like interpreter to implement its features To issue a command in FORTH you must supply the arguments before the command for example O 19200 BAUD In FORTH anything you enter is termed a word New words case insensitive are placed on a stack Some words are known to the system and may represent commands if a command finds itself at the top of the stack e g because it is the last thing you typed they will execute remove themselves from the stack and then remove further items from the stack to use as arguments March 2011 53 CMG CD24 Thus in the command above the numbers have no immediate effect so stay on the stack BAUD removes itself and the previous two items here 0 and 19200 off the stack then performs its action using these as arguments If a command completes with nothing remaining on the stack the digitiser will show the prompt ok Otherwise no prompt will be given Some commands such as SAMPLES SEC clear the stack automatically a
53. e CD24 has a 1kb buffer inside its firmware memory which can be used to store information about attached sensors Users are free to store any data they wish in the digitiser s InfoBlock information block Typically this is used to store calibration parameters poles and zeroes etc Newer digital sensors have their calibration information pre loaded into the information block in the format described below Software applications such as Scream can read the information and use it to display values using physical units rather than counts Information about viewing and uploading digitiser information blocks using Scream s graphical user interface can be found on our website at www guralp com articles 20071012 howto upload infoblock but if Scream is not available InfoBlocks can be loaded from the digitiser command line using the LOAD I command as described in section 5 2 4 on page 55 7 1 1 Format of the default information block The calibration information begins with the line instrument id The instrument id is formed from the system ID and stream ID serial number separated by a dash e g GURALP DEMO It is also the string which identifies the digitiser in the lefthand pane of Scream This information is not actually used by the digitiser or by Scream but is included for consistency with the calvals file and other utilities see www guralp com articles 20060818 howto scream scaling and the Scream manual for information about t
54. e you are happy with any changes you have made in the Control window click Apply to send them to the digitiser where they will take effect immediately 3 2 1 System al0 xi System Triggering Calibration Mass Control Data Flow Sensor Type CMG 6TD b J Enable GPS power cycling at E hours March 2011 37 CMG CD24 38 When the Control window is first opened it will be showing the System pane Sensor Type This option tells Scream which control commands to make available to the user If you change the Sensor Type you may have to Apply the change close the Control window and open a new one to access the Mass Control options Enable GPS power cycling If you are using a GPS unit to receive time signals but do not experience significant drift in the system s clock for example in a stable temperature environment you can save power by selecting Enable GPS power cycling When this option is selected the CD24 will only check the GPS time at intervals of a specified number of hours 3 2 2 Triggering E gt 13AZ1 C954 DM32 6X Control System Triggering Caibeation Mass Cortiol Data Flow STA LTA LEVEL Channel STA LTA Ratio Charnel Level fs 1 10 4 E 10 raat foe 2 Fnqjfo E fi 10 2 r jo l Common vaes W Common valves l Enable Extemal Tigger Input Pre Trigger seconds 5 T Enable External Trigger Output Post Trigger seconds 20 Sow Xcel to
55. ements If you cannot see the calibration signal zoom into the Waveview using the scaling icons at the top left of the window or the cursor keys 4 Drag the calibration stream Cn across the Waveview window so that it is at the top 5 If the returning signal is saturated retry using a calibration signal with lower amplitude until the entire curve is visible in the Waveview window 6 If you need to scale one but not another of the traces right click on the trace and select Scale You can then type in a suitable scale factor for that trace 7 Pause the Waveview window by clicking on the IE icon 8 Hold down SHIFT and drag across the window to select the calibration signal and the returning component s Release the mouse button keeping SHIFT held down A menu will pop up If it doesn t it is likely because you have not selected at least two signals calibration and the returning components 9 Choose Broadband Noise Calibration 50 Issue C Operator s Guide Tar WaveVirw Qu E SOM FE A E ireira Ampi lirsees 10 The script will ask you to fill in sensor calibration parameters for each component you have selected a nn B Please supply calibration info for IKNUD MKIZ2 Calitrato1 Resistor hms 510c0 Coil Soretan a m e 2 000483 Calitrator Crannel uW Count 3402 Sensor Charnel innt 1701 nstrumert lype aT Instrumert R2spo7s 330s veosiy Num
56. emind you that the trigger is active Every checked box in this window will give rise to a data stream coming from the digitiser which will be displayed in Scream s main window when Scream first receives some data from it Every stream is identified by a 6 character code where the first four characters identify the digitiser and the last two characters identify the individual stream The first four characters are set by default to the serial number of the digitiser you can change this on the System ID pane see page 26 or from the digitiser s console 3 1 3 Triggering In its standard configuration the CD24 outputs continuous data at a sample rate you specify In addition to this G ralp digitisers can run a triggering algorithm on the data they acquire This allows you to record data continuously at a relatively low sample rate but record at a much higher sample rate during short periods when the trigger is active The parameters controlling the triggering algorithm and controlling the data output once the system is triggered are all selectable by the user permitting maximum flexibility of operation and the most efficient use of available storage space t W3700 GO00 DM32 6X Configuration Setup to System ID Output Control Triggering Mux Channels Poets STA LTA LEVEL Data Source Bandpass Fher Dala Source Tap 1 100sps 5Hzt045Hz Tap1 100sps gt Channel STA LTA Rabo Charnel Level F zO i 10 e Y
57. emory to an attached IEEE 1394 FireWire device starting at the point where the previous FLUSH ended if any The CD24 remembers the new flush point so that next time you issue FLUSH no data will be repeated If you want to transfer the entire Flash storage use FLUSHALL instead During the transfer the CD24 will report the sector numbers that are being transferred flush Last Flush 00200056 2002 12 17 09 22 22 00200056 Starting Transfer 00200056 CHIP 00200056 00200812 00201012 00201812 Transfer Finished March 2011 79 CMG CD24 If no data have been written to Flash since the last FLUSH you will see the message No data to save If there is no disc connected or the cable is faulty you will see the message No disk found 5 11 3 FLUSHALL Syntax FLUSHALL Transfers all the data currently in Flash storage and updates the FLUSH pointer so that subsequent FLUSH operations do not duplicate the data 5 11 4 RESET DISC Syntax RESET DISC RESET DISK Resets the FAT file allocation table of a Firewire disc so that it contains no files You should only use this command if you want to overwrite any data already on the disc You will be asked for confirmation before the operation proceeds In emergencies you may be able to recover data from a disc which has been erroneously reset by dumping the disc contents directly onto your computer with dd or a similar direct read tool as long as you have not allo
58. ems only Issue C Operator s Guide The value at each of the eight hex code positions is the total of the values of the required components expressed in hexadecimal For example Sensor B 0000 XENZ Sensor B Sensor A 0 4 2 1 0 0 2 1 XEN ZIIX EN Z In the above example the following data outputs are activated N and E from Sensor B at Tap 3 No outputs from Sensor B at Tap 2 X channel from Sensor B at Tap 1 Z N and E from Sensor B at Tap 0 Z and N from Sensor A at Tap 0 Further examples To set the N component at Tap 2 of Instrument A the hex code would be 0002 0000 To set the all 3 components at Tap 3 of Instrument B the hex code would be 0000 7000 The Hex Code for the Mux channels is configured in much the same way ABCD A MO to M3 B M4 to M7 March 2011 61 CMG CD24 62 C M8 to MB D MB to MF The least significant bit is the lower channel within each group i e MO 1 and M3 8 For example to configure mass position outputs for the first instrument M9 MA and MB the required code would be 0070 Note M8 Z Mass position M9 N S Mass position MA E W Mass position MB Calibration signal on 3 channel digitisers ME Temperature 5 4 4 COMPRESSION Syntax bits size COMPRESSION or NORMAL COMPRESSION Sets the maximum amount of compression to use Greater compression means the digitiser outputs data more efficiently so more can be tr
59. er or EAM you may need to unroll the entry for that server by clicking on the a icon to see the digitisers connected to it 2 Right click on the digitiser s entry not the icon for the server or any ComXX icon Digitisers are shown with icons depicting a coloured cylinder 3 Click Configure Scream will then contact the digitiser and retrieve its current configuration a process which will take a few seconds Once done the Configuration setup window will be displayed 4 Once you are happy with any changes you have made in the Configuration Setup window click UPLOAD to send them to the digitiser and reboot This will take a short while Note After uploading allow up to 1 minutes for the digitiser to re boot and resume transmitting data To control a digitiser whilst it is running either right click on the digitiser s entry in the list and click Control or double click the entry In either case Scream will contact the digitiser to retrieve control information and display the Control window The options you can control immediately are the type of sensor you are using GPS power cycling options March 2011 25 CMG CD24 the short term and long term average values for triggering but not which streams perform the trigger or which are output by it see section 3 1 3 on page 29 the length of pre trigger and post trigger periods calibration signal options mass control functions Some of these o
60. es you may have to either experiment with this value to obtain reliable connections or use a wireless scanner to identify an unused or relatively quiet channel 5 The final prompt allows you to disable or enable the security features of the wireless interface Systems are shipped with security disabled in order to simplify access for Devicelnstaller March 2011 107 CMG CD24 7 5 Appendix E Using third party terminal emulators There are a number of terminal emulator programs that you can use to access the serial ports of the digitiser and the optional networking interface The terminal emulator built into Scream is recommended but if this is not available there are a variety of alternatives Three of these are detailed below 7 5 1 Hyperterminal as provided with Windows XP Click on Start and then on Run Enter hypertrm and click on OK Type the name of a program folder document or Internet resource and Windows will open it For you Cancel Browse The program will ask you for a name for the connection Connection Description Y New Connection Enter a name and choose an icon for the connection Name Direct Enter any suitable name then click OK 108 Issue C Operator s Guide You will then be prompted to enter COM port and modem details Connect To Enter details for the phone number that you want to dial Country region Area code Pho
61. f bits of the IP address to be used for network identification Note that this is not the standard way of specifying netmasks it is more akin to the n modifier used in CIDR address specification 7 4 4 Configuration of the WiFi interface If your system has WiFi capabilities they can be configured using the same menu system 1 2 106 From the main menu select 4 and then press the Enter key to access the WiFi settings Configure your topology keying O for Infrastructure or 1 for Adhoc mode and then press enter Enter the desired network name SSID Systems are shipped with a default SSID of LTRX_IBSS so that they can be found and configured by Devicelnstaller but you can enter any suitable value here Issue C Operator s Guide pep HyperTerminal Elle Esk ven cal Dansfer Heb 04 23 05 Y gt Expert 6 Securily 7 Defaults 8 Txit without save 9 Save and exit Your choice 4 Topology O Infrastructure 1 AdHoc 1 1 Network name SSI LIRK_LBSS 2 CURALI Channel 11 Security U none 1 HEP 9 TX Data rate O fixed 1 auto 1 Change Setup Server 1 Channel 1 Channel 2 3 E mail 4 MA 5 Expert 6 Security 7 Defaults 8 Exit without save 9 Save and exit Your choice _ Cun enter 0 00 52 Aulu Lede 360C 6 W 1 NUM 4 The Wifi communications channel can normally be left at its default If you are deploying the system in an area where there are many other wireless devic
62. f you do not have a wireless router or access point you can configure your computer to set up an ad hoc wireless network when the CD24 comes within range To configure Windows XP to set up an ad hoc wireless network 1 Open the Control Panel and select Network Connections 2 Right click on the Wireless Connection icon and select Properties Switch to the Wireless Networks tab 1 Wireless Network Connection Properties 2 x General Wireless Networks Advanced IV Use Windows to configure my wireless network settings m Available networks To connect to disconnect from or find out more infomation about wireless networks in range click the button below View Wireless Networks m Preferred networks Automatically connect to available networks in the order listed below Leam about setting up wireless network Advanced configuration vence 3 Under Preferred networks click Advanced Select Computer to computer ad hoc networks only 21x r Networks to access Any available network access point preferred Access point infrastructure networks only Computerto computer ad hoc networks only Automatically connect to non prefered networks Ensure the Automatically connect to non preferred networks box is not ticked Click Close to return to the Wireless Network Connection Properties window March 2011 113 CMG CD24 114 4 Under Preferred networks clic
63. for connecting to a power source You may need to attach a suitable connector to the power cable provided The CD24 draws a nominal current of 55 mA from a 12 V supply when in use thus using a 12 V 25 Ah sealed heavy duty lead acid battery you should expect the digitiser to operate for more than a week without recharging The CD24 may also have connectors for the FireWire Ethernet or Wi Fi interfaces 2 2 Test installation To test the CD24 you will need access to a PC with a 9 pin serial port RS232 a 12 V power source and a working sensor e g CMG 3ESP ESPC 40T or 6T Install Scream on your PC and run it 10 Issue C Operator s Guide Connect the wire from the breakout box to the CD24 s 19 pin connector labelled POWER DATA GPS Connect the 6 pin connector on the breakout box to the GPS unit using the GPS cable Position the GPS so that it has a good view of the sky Note If you do not have a view of the sky you can operate the CD24 without a GPS unit but timing information may be inaccurate Connect the sensor to the 26 pin connector on the side of CD24 Connect the 6 pin data plug on the breakout box to the 9 pin serial port on your PC using the serial cable Use the power cable to connect the 10 pin power plug on the breakout box to a fused 10 28 V power source The CD24 and instrument are now fully operational and will already be producing data After a few seconds you should see the CD24
64. from the digital instrument and record data from its attached analogue instruments when it receives one depending on its Output control configuration 4 UPLOAD the new configuration to the digitiser If a digitiser has both Enable External Trigger Output and Enable External Trigger Input selected it will record data when it receives an external trigger notification as if it had triggered itself but it will not send that trigger notification on to other digitisers It will only send a trigger notification if its own triggering criteria are satisfied 3 1 3 4 Pre trigger and post trigger recording In order to capture all of a seismic event it is often useful to be able to record data immediately preceding the trigger G ralp digitisers have Issue C Operator s Guide an internal buffer of some seconds which allows these data to be added to the triggered stream Pre trigger data are particularly useful for emergent type signals where the system does not trigger until one phase after the first arrival In addition to ensure that the coda of each event is included some seconds of data are recorded after the trigger condition has ended The two boxes at bottom right of the Triggering pane allow the user to set the pre trigger and post trigger data intervals in seconds These values determine the minimum length of time during which data will be saved before the trigger condition occurs and after it has lapsed Regardless of the in
65. fter they execute Pressing ENTER twice will always clear the stack Some commands are interactive and will ask you to provide extra information after you execute them In the following sections interactive commands are shown as example sessions where information you enter is given in bold and messages returning from the CD24 are given in medium Some of the less used commands are not normally available over the terminal interface In order to access these you need to import them into the current dictionary with the command ok 1 You now have access to the full FORTH word list To return to the normal state of the interpreter issue the command seal 5 2 General configuration 5 2 1 SET ID Syntax SET ID interactive Sets the system identifier and serial number of the CD24 to values you supply SET ID System Identifier WO3008 MYCD24 Serial 123400 4507 The system identifier you supply may contain up to 5 alphanumeric 0 9 A Z characters The CD24 will pad any remaining space on the right with zeroes If you want to use a system identifier less than 5 characters long insert zeroes on the left to make it up to 5 characters The digitiser will interpret leading zeroes as blank Because of this you cannot have a system identifier that begins with a zero The serial number you supply must contain 4 alphanumeric 0 9 A Z characters as shown As for the system identifier leading zeroes are interpre
66. hardware sccisssivsvecnisavsvstesvnvniuavgssduaveanivaogsunesgonsnenesnsss 20 24 gt Configuring the dais ii uainesaaoen aenaenown 20 2 5 Downloading data over Fire Wir6 coooncnonononaninunaninucnnonunarocnnacnnonccnnrncnronicncnss 21 2 5 1 Redding CD24 disks yy itiseavdsvsdsassrusartaasidctaomarsiecs bois 22 2 6 Receiving data in Scream se ssesssssessesersersrserssteesseeereesssterseresseesereeseserssteset 23 3 Configuration Control with ScreaM omooonnnncononncnninnnnnnnananononanannnnononnancnnnnnnonnns 25 3 1 The Configuration dialogues iis iis sississssivsssteevatorsus lroii das 25 3 1 1 System MD dd 26 31 2 UU AAA 27 31 3 A A aces DEEE SS 29 3 14 M x A ER TP Ea 35 A pes teuycbaten von bev uushead vasnsueatsesuas voy ava uaunusebletel tats tat set nitehtabodusorss dy te 36 3 2 The control dial gUe nina aba 37 A MS EI a a E EE E E teehee dodevpannea tes 37 3 2 2 A vases se eestn bisa r E Eni EEE E E SE E EEES 38 3 248 Calibrador ia 38 3 2 4 E AAA O 40 3 29 Data TOW a ieee 40 3 246 Buffering Modest oi 46 3 3 Digitiser status AA A vancaeusspoasvasnentecds 47 Bd NPS E A 47 4 Galabrating the CD24 iii a A A a id 49 4 1 Galibrati on MOTO Ss ad AAA 49 4 2 Noise calibration with Scream dde dais 49 4 21 Sensor response CODES insni ie dis 52 Operator s Guide 5 Command line interface unica ds 53 5 1 FORT EAN 53 5 2 General cOn aca aiii ia Ra 54 Bp O owas binlae Caco AAT 54 5 2 2 BAUD cord 55 SA DOPED EEE
67. have finished setting up the module apply the new settings by selecting option 9 Save and Exit The module will re boot with the new settings in effect 7 4 3 Configuring the Ethernet port To configure the Ethernet port 1 If DHCP is not being used to assign IP addresses enter the required address manually The IP address must be set to a unique value in the network Enter each octet and press Enter to move to the next octet The current value is displayed in March 2011 105 CMG CD24 2 3 parentheses If you do wish to use DHCP enter O at each prompt an IP address of 0 0 0 0 is used to select DHCP operation pep HyperTerminal Yen cal Transfer Heb 6 05 F 2 Channel 2 3 F mai gt Expert 6 Security Defaults 8 Cxit without save 9 Save and exit Your choice 8 IP Address 000 192 000 168 006 10 000 102 Set Gateway Ll Address N N Netnask Number of Bits for Host Part default 0 Change telnet config password N 7 Change Se lup Server 1 Channel 1 2 Channel 2 F nai l 5 Expert 6 Security 7 Defaults 8 Exit without save 9 Save and exit Your choice Cun eater 0 14 28 Aulu Lede 360C 6 W 1 NUM If the digitiser is to be connected to a routed network enter the address of the default gateway in the same manner At the netmask prompt enter O if you are using normal classful internet addressing If you have a non standard or classless addressing scheme enter the number o
68. he Channel column of the table 33 CMG CD24 34 3 The values in the Level column are the number of counts above the baseline that channel must reach before a trigger is generated The values are determined from the Details window for the channel under consideration Note that the offset must be set to zero in order to determine the real baseline value The Level values will be the same for each channel unless the Common values check box is deselected Once you have enabled the Level triggering method on a particular channel you can use the Control window to change the level at which the system triggers without restarting the digitiser 3 1 3 3 External triggering When a digitiser or digital sensor triggers it can send a notification signal to connected devices You can configure other digitisers to respond to this signal by triggering in turn This is an option which you can specify at the time of ordering As an example to instruct a stand alone digitiser with digital trigger inputs to respond to trigger notifications generated by an attached digital sensor 1 Open the Configuration setup window for the digital sensor and check Enable External Trigger Output to make it send trigger notifications to connected devices 2 UPLOAD the new configuration to the digital sensor 3 Open the Configuration setup window for the digitiser and check Enable External Trigger Input to make it listen for notifications coming
69. he calvals file After the identifier calibration information is stored in the form FIELD VALUE with one field on each line The fields used are shown below Serial Nos An optional serial number to be displayed in the optional title of Scream graphs VPC The sensitivity of the Z N S and E W digitiser input channels in UV per count separated by commas These are given on the digitiser calibration sheet e The gain of the Z N S and E W sensor 84 Issue C Operator s Guide components separated by commas For velocity sensors the gain or sensitivity is given on the sensor calibration sheet in V ms The gain of an accelerometer is expressed on its calibration sheet in V ms Because the outputs are differential these are written as 2 x single ended sensitivity Most set ups including all those using DM24mk3 and CD24 digitisers will use the doubled value but older integrated instruments combining a DM24mk2 with a sensor will use only the single ended sensitivity value COILCONST The coil constant for the Z N S and E W sensor components in A ms separated by commas These are given on the sensor calibration sheet For a CMG 5T accelerometer the values are all set to unity use COILCONST 1 1 1 for these CALRES The value of the calibration resistor in Q as given on the sensor calibration sheet For a CMG 5T use CALRES 1 CALVPC The sensitivity of the digitiser s calibration channel in u
70. hich disconnects the Trigger Out Common pin on the POWER DATA GPS port from the Trigger Out Normally Closed pin and connects it to the Trigger Out Normally Open pin See section 7 3 1 1 on page 96 for connector details The relay is only activated whilst the generator is active This does not include any pre trigger or post trigger period which is dealt with by the trigger receiver A trigger signal may be as short as one second The trigger receiver acts upon trigger signals normally by recording or transmitting additional data streams The receiver will always enable these extra streams if the trigger generator determines that a trigger has occurred If the external trigger input has been enabled the receiver will also act on a logic signal received on the Trigger In pin of the POWER DATA GPS port Any signal between 3 and 40 V can be used the trigger input pins drive an opto isolator protected by a constant current circuit 88 Issue C Operator s Guide Digitiser or digital instrument Trigger action Trigger generator 20000700000 v0 U a O O G j O o Q o a S O o Q o a 09 D 0 D 0 o O 5 A PS Cc S 3 5 I I 1 1 lt lt o 3 J o 0 O 3 3 3 3 D 3 O 3 lt 2 o O D D SS The Trigger Out relay is not activated if you provide a Trigger In voltage The digitiser must trigger itself for the relay to switch This arrangement prevents any trigger loop
71. hould be taken over a much longer interval Both the STA and LTA values are recalculated continually even during a trigger 30 Issue C Operator s Guide The Ratio column determines by what factor the STA and LTA must differ for the trigger to be passed Finding the ratio most suited to your needs is best done by experiment Too high a value will result in events being missed while too low a value will result in spurious non seismic noise triggering the system Like the averages their ratio is continuously recalculated for all components Note that none of the boxes are allowed to be empty and so you will need to enter the new value before removing the old one Alternatively you can use the up and down cursor keys to change the values For example setting the STA to 1 second the LTA to 10 seconds and the Ratio to 4 would give rise to the following trigger behaviour Raw data Filtered data Short term average 1 sec HR pre tng post Ing 50 60 70 80 90 100 110 120 Time seconds Usually the values of the STA period the LTA period and the Ratio will be the same for all checked channels For convenience Scream will automatically fill in other values to match ones you enter If you want to use different values for some channels you should clear the Common values check box before altering them Once you have enabled the STA LTA triggering method on a particular channel you can use the Control
72. ht look like the following GURALP DEMO Serial Nos T3X99 VPC 3 153 3 147 3 159 G 1010 1007 1002 COILCONST 0 02575 0 01778 0 01774 CALVPC 3 161 CALRES 51000 TYPE CMG 3T RESPONSE CMG 3 30S 50HZ Vel GRAVITY 9 80122 CMG 5T accelerometers use 10 calibration resistors and their coil constant is set to unity For example 86 GURALP CMG5 Serial Nos T5585 Issue C Operator s Guide VPC 2 013 2 028 2 036 G 0 256 0 255 0 255 COILCONST 1 1 1 CALRES 1 TYPE CMG 5T RESPONSE CMG 5 100HZ Acc GRAVITY 9 81089 March 2011 87 CMG CD24 7 2 Appendix B Setting up external triggering G ralp digitisers and digital instruments can be supplied with external triggering capabilities installed The external trigger system is designed for maximum flexibility you can trigger other digitisers or your own equipment using built in relays and any equipment may be used as a trigger source using the built in opto isolator In addition a trigger circuit can link together any number of digitisers so that they trigger simultaneously when they receive a signal 7 2 1 Overview The digitiser or digital instrument has two internal components related to triggering the trigger generator and the trigger receiver The trigger generator runs the triggering algorithm and determines whether a trigger has occurred If external trigger output has been enabled the trigger generator also operates a relay w
73. ifficulty finding satellites there may be a delay of several minutes before a new message is displayed Before beginning the digitiser s internal time synchronisation software will wait for the GPS unit to report a good position fix from at least 3 satellites for at least 6 consecutive messages Messages are normally received every 10 to 20 seconds The system will then set the internal clock and re synchronise the Analogue to Digital Converters so that the data are accurately time stamped to the new reference Any data transmitted up to this point will be stamped with the time from the internal backup clock which is set to the new accurate time at the end of this process The re synchronisation will result in a discontinuity in the data received From this point the control process will attempt to keep the internal time base synchronised to the GPS 1 pulse per second output by adjusting a voltage controlled crystal oscillator First it alters the voltage control to minimise the error Next it attempts to minimise both the phase error i e the offset between the internal 1 Hz signal and the GPS and the drift the frequency error relative to GPS During the control process the system reports the measured errors and the control signal applied as a PWM Pulse Width Modulation value During the initial coarse adjustment stage only the coarse voltage control is used and no drift calculation is made If the system is operating in a
74. ion is disconnected the same number of minutes after the negative edge component specifies which component is to be calibrated one of z N S or E W You can alter the duration of each step using the MINUTE command described below 5 6 3 RANDOMCAL Syntax component RANDOMCAL Instructs the CD24 to inject a white noise calibration signal generated by an onboard pseudo random number generator component specifies which component is to be calibrated one of z N S or E W Some sensors use only the Z calibration loop for all three components The calibration signal will be automatically disconnected after 2 minutes if you have not altered the setting using the MINUTE command described below 5 6 4 MINUTE Syntax duration MINUTE Sets for how long the next SINEWAVE calibration signal will be injected or the period of the next SQUAREWAVE calibration signal duration is the desired interval in minutes If you now issue a SINEWAVE command the calibration will last duration minutes if the next calibration command is SQUAREWAVE a positive step of duration minutes will be generated followed by a negative step of a further duration minutes If you do not issue MINUTE calibration signals will default to 2 minutes This is to avoid the sensor and digitiser inadvertently being left in calibration mode Issuing e g 5 MINUTE will cause the next calibration signal to last 5 minutes but later calibration signals will revert t
75. iser in FILING mode by connecting to its terminal interface and issuing commands such as FLUSH or through Scream see below Heartbeat messages When in FILING mode a digitiser transmits heartbeat messages over its data port These short messages take the place of data blocks and ensure that programs such as Scream know that a digitiser is present You can change the frequency of heartbeat messages from Scream s Control window or with the command HEARTBEAT You can tell Scream to download new data automatically whenever it receives a heartbeat message from a digitiser in FILING mode This is useful for example in autonomous installations connected by intermittent modem links To enable this feature 1 Choose File gt Setup from Scream s main menu and navigate to the Recording pane f Setup Y eee Display Pree Steam Mapping EMad Com Posts Reccdng Fier Evertlog Streams Auto Recced Enable foe High Sample Rates Auto Receed Enable fee Low Sample Rates Auto RecordEnable foe Status Streams Auto Recced dowrloaded streams F Auto dowrload on heartbest Close Files alter tenecet Recording Mode Stop on Disk Full Ring Buller C Sueam Buiter Ordy Leave 50 lt lt Mb frea diik space Y 0K X Cancel Y ioy 7 Heb 2 Check Auto download on heartbeat 3 Click OK Using FILING mode with Auto download on heartbeat ensures that Scream receives all new data whenever it c
76. itisers can produce either sine wave or square wave step calibration signals newer models can also carry out broadband noise calibration The Sine wave calibration signal always starts and stops on the zero crossing The frequency or period is specified in the boxes at bottom left Only integers between 1 and 10 may be specified for either frequency or period so to generate a 0 5 Hz signal you should select Period and set the time to 2 seconds Likewise if you require a 0 25 second period you should select Frequency and set the rate to 4 Hz In this manner you can select frequencies ranging from 0 1 to 10 Hz 10 to 0 1 s periods You can specify step calibration by selecting the Square wave button The square wave consists of a positive step at the start of the next minute of the digitiser s internal clock followed by a negative step after a specified number of minutes After a further delay of the same number of minutes the calibration signal is disconnected The default is 2 minutes The Period and Frequency are ignored 39 CMG CD24 The Broadband Noise calibration signal consists of a constant stream of white noise which lasts for the specified number of minutes The Period and Frequency are ignored 3 2 4 Mass control If supported by the instrument the CMG CD24 can initiate locking unlocking or centring of the mass If the instrument does not support locking unlocking and centring instructing the CD24 to centre
77. ix Devices at the top and a table on the right 9 The program will automatically look for Lantronix devices on all of your computer s network interfaces If necessary you can narrow the selection by clicking on an entry in the tree on the left If the program does not list the device press F5 or use Device gt Search from the menu system 14 Issue C Operator s Guide 10 A Wi Port entry should appear in the table on the right denoting that a device has been detected 11 If more than one Wi Port entry appears Devicelnstaller has detected several devices 12 For every detected device the program shows the Hardware Address i e the MAC address and the IP address it is currently using If you are using a wireless router with a DHCP server or an access point connected to a network with a DHCP server the device will use DHCP to assign it an address Otherwise a random address will be chosen automatically Note Automatic random addresses all begin with 169 254 The CD24 will choose a different one every time it is power cycled or rebooted 13 The address of the CD24 may be shown in red with the status Unreachable If this happens the sensor and PC cannot communicate because they are not on the same subnet Click Assign IP to start the IP configuration wizard Follow the instructions in the wizard to set the IP address or configure DHCP if you are using a DHCP server When you have finished press F5 or use Device gt Se
78. k Add Switch to the Association tab Wireless network properties CA DES Association Authentic ation Connection Network name SSID LTRX_IBSS Wireless network key This network requires a key for the following Network Authentication oen y Data encryption E Confirm network key Key index advanced fi a The key is provided for me automatically IV This is a computerto computer ad hoc network wireless c 5 Fill in the Network name SSID of LTRX_IBSS 6 Set Network Authentication to Open and Data encryption to Disabled Click OK The network connection should now be visible under Preferred networks and in the main Wireless Network Connection window 7 Wirebess Helwork Conme livn xj prems asks Choose a wireless network Refresk n2zwore lst Click ar item in the Ist aelaw ennert to wreless nevar ir rangen h get moe 2 ane ga Information lt i Set up a nireless nebmorle a PIRX ISS Notennnected Uy Fer a nome er mol offie 2 i prales ads yo um y Leom azout asks E sonny emails wrriens netware m1 vela hira neal gy er ly Chance the order ct i prefered nehaeeds 2 senny enablse vane eas artwnrk wall pi a 9 INVIAS eettng H senny erablee reses artwerk wall Initially the network will be shown as Not connected 7 Power cycle the CD24 After a short while your computer should report that it has connected to the LTRX_IBSS network
79. ltage can be anywhere between 4 and 40 V DC as the constant current circuit protects the LED of the optoisolator If the external equipment provides a normally open relay contact the digitiser s power supply can be used to activate the trigger input Connect the common pin of the relay to the positive supply on pin A Connect the normally open pin of the relay to the positive trigger input on pin V Connect the trigger input return pin U to the negative supply on pin B Connect the other pins as normal Issue C Operator s Guide Digitiser or digital instrument Trigger action Trigger generator External Equipment Trigger Out do 7 2 4 Triggering several CD24 digitisers simultaneously A common use of the external triggering feature is to ensure that all digitisers in an array trigger at the same time This can be achieved with the wiring layout described in this section With this arrangement any digitiser can generate a trigger which will be passed on to all the digitisers in the array For each digitiser pins B power supply ground and U trigger input return of every digitiser are connected to a common ground pins T trigger out normally open and V trigger in positive of every digitiser are connected to a common trigger line shown in orange on the diagram for each digitiser pin R trigger out common is connected to the power supply positive rail via a diode an IN4001
80. m both instruments will be transmitted whenever the CD24 triggers If a CD24 has both TRIGGERIN ENABLE and TRIGGEROUT ENABLE in effect only triggers which the CD24 itself has generated will be output Triggers received through the Trigger in port will cause the CD24 to output triggered streams but will not be passed on to other digitisers 5 6 Calibration 5 6 1 SINEWAVE Syntax component freg or period unit SINEWAVE Instructs the CD24 to inject a sine wave calibration signal starting on the zero crossing component specifies which component is to be calibrated one of z N S or E W freg or period and unit together determine the frequency of the calibration signal If unit is HZ then freg or period is taken as a frequency in Hz if SECOND then it is interpreted as a period in s For example N S 4 HZ SINEWAVE freg or period must be an integer if you want to specify a period of for example 0 5 s you should specify it as 2 HZ instead The calibration signal will be automatically disconnected after 2 minutes if you have not altered the setting using the MINUTE command described below 5 6 2 SQUAREWAVE Syntax component SQUAREWAVE Instructs the CD24 to inject a square wave step function calibration signal consisting of a positive step on the start of the next clock minute followed by a negative step some minutes later by default 2 March 2011 67 CMG CD24 The calibrat
81. n most cases you will need to have administrative privileges to do this 1 Install and start the DHCP service on your PC 2 For Ethernet networking connect the CD24 s ETHERNET port to the the PC s network interface either using a crossover Ethernet cable or through a network hub Note that using a hub you can 16 Issue C Operator s Guide connect several CD24s to the same PC and configure them all at the same time 3 For Wireless Networking configure your wireless router or access point to use a network name SSID of LTRX_IBSS Disable any security features of the wireless router or access point 4 DHCP will not work through routers or across the Internet All the devices need to be on the same network segment as the PC 5 Monitor the DHCP server to find out what IP address it gives to each digitiser 6 To configure a device enter its IP address into a web browser 2 3 3 Configuration with the web interface Once you have access to the Wi Port s Web interface you can configure it with its proper settings 1 The Web page is divided into three A menu on the left switches between the pages of configuration options on the right There is also a banner at the top which tells you the current firmware revision and the MAC address 2 To navigate around the Web site click on the entries in the left hand menu When you have made changes to the settings on any page save them by clicking OK before you leave the page
82. n SCREAM refer to the user manual available from the G ralp Systems website www guralp com 2 3 Setting up the Ethernet or wireless interface CMG CD24 digitisers with Ethernet or Wireless features installed use an embedded Lantronix Wi Port module to provide the network interface Configuration of the Ethernet or Wireless interface is made using the Lantronix Devicelnstaller utility for Microsoft Windows using a DHCP server or the via the serial port You will need a PC with a network or wireless interface installed or an RS232 connector You may find it easiest to gather together all the Wi Fi hardware before taking it into the field and configuring it from a local wireless enabled PC There are two types of wireless network topology supported by the Wi Port e Infrastructure networks need additional hardware such as wireless access points and routers to work Any host on the wireless network will communicate with the access point or router which manages all the connections and ensures data are transmitted correctly This device may also provide connectivity to the Internet or your local network e Ad hoc networks can be set up with no additional hardware Each host on the wireless network attempts to communicate directly with the other hosts Ad hoc networks are easy to set up but they are only suitable with a small number of hosts In seismic networks infrastructure mode is normally preferred since sensors do not need to c
83. n can be identified On delivery from the factory the system identifier and the serial number are set to the GSL works order number and the digitiser s serial number but any combination of letters A Z and numbers can be used such as an abbreviation of your institution s name etc The system identifier can be up to 5 characters long while the serial number cannot be longer than 4 Sensor Type This option tells Scream which control commands to make available to the user The CD24 does not require separate control commands so you should not change this option GPS Type The digitiser needs to be able to time stamp accurately all data that passes through it It sets its clock by receiving time signals from the GPS satellite network using an attached Trimble GPS unit This is hard wired into the CD24 so the GPS Type setting has no effect Enable GPS power cycling If you are using a GPS unit to receive time signals but do not experience significant drift in the system s clock for example in a stable temperature environment you can save power by selecting Enable GPS power cycling With this option in use the GPS time is only checked at intervals of a specified number of hours Disabling this option keeps the GPS unit running constantly if you have ample power this will give the most accurate results You can choose any whole number of hours for the interval 3 1 2 Output control The Output control tab allows you to select whi
84. nal emulator examples of which are given in section 7 5 on page 108 A special Auxiliary terminal breakout cable is required please contact G ralp Systems technical support for details First with the power to the digitiser turned off connect the auxiliary terminal breakout cable to the PC and start the emulator Configure the emulator for 9600 baud 8 data bits no parity bit and one stop bit 8 N 1 regardless of the configured settings of the networking module Next hold down the key while turning on the power to the digitiser After a few seconds a banner will appear showing the MAC address of the network interface along with software and library version information Press the Enter key to access the set up menu If you do not press a key the system will proceed to boot normally 7 4 2 Configuring the network interfaces Once you have access to the networking module s configuration menu you can configure it with its proper settings The networking module has two serial channels Channel 1 normally accessible via TCP port 10001 is exposed on the power port of the breakout box This is the channel that you are currently using if you have followed the instructions in the previous section Channel 2 normally accessible via TCP port 10002 is connected to the data output of the digitiser when no other serial device is connected It is disconnected when the digitiser detects that Scream or a terminal emulator is co
85. ne number Connect using i The Country region Area code and Phone number boxes can be ignored they are only used when working with modem connections Select the name of the correct COM port from the Connect using drop down menu then click OK You will then be prompted to select port configuration settings COM1 Properties Port Settings Bits per second Data bits Parity Stop bits Flow control March 2011 109 CMG CD24 Ensure the following parameters are set Bits per second 9600 Data bits 8 Parity None Stop bits 1 Flow control None Click on OK and the program will then connect provide you with a terminal emulator screen from which you can access the command line of your system 7 5 2 Using Hyperterminal with Windows Vista or Windows 7 HyperTerminal is not provided with the Windows Vista or Windows 7 operating systems but the necessary files can copied from the i386 directory of the Windows XP CD if you have one available The two files you will need are hypertrm dll hypertrm exe Copy the two files into your windows system32 directory If you do not have a Windows XP disc the files can be downloaded from www mediafire com To access HyperTerminal use Windows R on your keyboard Enter hypertrm and click on OK Now follow the instructions given in section 7 5 1 above 7 5 3 Using PuTTY PuTT
86. nnected thus disabling data flow over the network During the configuration process you are prompted in turn for every value in the current section If you are unsure at any point pressing the Enter key will retain the current value Please note that many values need to be entered using special codes These are all documented in the relevant Lantronix manuals 104 Issue C Operator s Guide From the main menu 1 Each channel is configured individually To configure either enter either 1 selecting Channel 1 or 2 selecting Channel 2 and then press the Enter key 2 Set the Baud Rate to 19200 This is the default baud rate for the CD24 s digital output If you change the baud rate in Scream or using the terminal you must change the Baud Rate setting here to match amp pep HyperTerminal ble Edt view Cal Jransfer Help Do 6 DH Y 2 Channel 2 E mail Expert Security Defaults Exit without save Save and exit Your choice 1 Baudrate 9640 19208 I F Mode 4C in Modem Mode Show IP addr after RING Y Auto increment source port N Remote IP Address 090 00 Remote Port DisConnHode FlushNode Pack Cntrl DisConnTime SendChar 1 SendChar 2 U 009 900 Cunmereu 0 17 23 Atludeleal 96C0 N 1 3 The remaining settings can be left at their default values which is done by pressing Enter at each prompt until you are returned to the main menu 4 When you
87. nse over the full frequency spectrum Injecting white noise into the calibration coil gives the response of the whole system which can be measured using a spectrum analyser Further information about calibration is available on the G ralp Systems Web site 4 2 Noise calibration with Scream A connected instrument can be calibrated using the digitiser s pseudo random broadband noise generator along with Scream s noise calibration extension The extension is part of the standard distribution of Scream and contains all the algorithms needed to determine the complete sensor response in a single experiment 1 In Scream s main window right click on the digitiser s icon and select Control Open the Calibration pane 2 Select the calibration channel corresponding to the instrument and choose Broadband Noise Select the component you wish to calibrate together with a suitable duration and amplitude and click Inject now A new data stream ending Cn n 0 7 March 2011 49 CMG CD24 should appear in Scream s main window containing the returned calibration signal F LE WaveVirw WEE mwe a Mo A trenes Ampl Cursors ARAL 12 Hii OOO AAA A ree apie reper 224 142 1226 KNUD MKW 3 Open a Waveview window on the calibration signal and the returned streams by selecting them and double clicking The streams should display the calibration signal combined with the sensors own measur
88. nter reaches the read pointer i e when the memory becomes full of data none of which have been downloaded is governed by the commands RE USE RECYCLE and WRITE ONCE Downloaded data Fresh data Unused HA AAA Read Pointer J Write Pointer Which data are downloaded depends on various parameters you can set which allow you to select a particular stream streams of a specified sample rate or streams within a certain time window You can set parameters separately or place the definitions before the DOWNLOAD command e g ALL FLASH HPAON1 STREAM DOWNLOAD 2004 12 01 00 00 FROM TIME ALL DATA DOWNLOAD 100 S S ALL TIMES DOWNLOAD ALL DATA ALL TIMES DOWNLOAD Before DOWNLOAD will work it needs to know e the desired time period which is specified with ALL FLASH ALL TIMES or FROM TIME and or TO TIME and e the streams you want to download which are specified with ALL DATA S S or STATUS ONLY The parameters are illustrated in the diagram below and fully described in the following sections If you miss out a parameter DOWNLOAD will use the value you last used March 2011 71 CMG CD24 ALL FLASH ALL DATA J STREAM xxxx ALL TIMES ae a STATUS ONLY DOWNLOAD FRON TIME TO TIME ee n SIS L tatus These iwo commands move the read pointer to the location of the write pointer after execution The DOWNLOAD command returns immediately so that you can issue more commands if requi
89. ntrol Data Flow Transmission Mode Buffering X Re use y Reset flash All data is stored in flash memory Flash memory is used in a circular Heartbeat status blocks are buffer fashion wrapping round produced periodically Use the when full and overwriting oldest Download Data context menu data option to transmit the data on the R5232 output Heartbeat interval Seconds 4l 00 FILESTORE C O0000F0FOFO300FF Auto Refresh X cose 7 Hep To choose a transmission or buffering mode select options from the Transmission Mode or Buffering drop down menus and click Apply Clicking Apply in this window immediately activates the transmission mode you have selected there is no need to reboot An explanation of the chosen mode is displayed beneath each menu The following sections also explain the filing modes available The Buffering legend also displays the amount of Flash memory present in your digitizer To clear the Flash memory of the digitizer click the Reset Flash button You will be asked for confirmation before the memory is cleared At the bottom of the tab is a line describing the current state of the digitizer s memory pointers You can use this line to check that data is being written into memory Select Auto Refresh to make the line update automatically March 2011 41 CMG CD24 42 If you prefer you can use the CD24 terminal to switch between transmission modes The commands to use which
90. o a duration of 2 minutes You will need to issue a MINUTE command before each injection Because of the way FORTH works you can insert MINUTE commands into SQUAREWAVE or SINEWAVE commands for example 68 Issue C Operator s Guide N S 4 HZ 5 MINUTE SINEWAVE E W 10 MINUTE SQUAREWAVE 5 6 5 AMPLITUDE Syntax percentage SAMPLITUDE Sets the calibration amplitude to the given percentage of the full scale signal 5 7 Actions 5 7 1 CENTRE Syntax CENTRE or CENTER MONITOR Centres the sensor mass es of the instrument CENTRE returns immediately whilst CENTRE MONITOR monitors the progress of the unlock by displaying mass positions as for LOCK MONITOR above When the masses are correctly centred the mass positions should read less than 1000 counts 5 7 2 AUTO CENTRE Syntax distance AUTO CENTRE Instructs the CD24 to perform a round of centring whenever a mass position drifts further than distance from zero distance is measured as a percentage of full scale Setting distance to zero disables automatic centring 5 7 3 RESP Syntax value RESP The CD24 provides a 1 second response mode for use when monitoring mass positions or adjusting offsets To enter this mode issue the command 1 RESP Once you have finished monitoring the mass positions you can return to broadband response mode by issuing 0 RESP March 2011 69 CMG CD24 5 7 4 MASSES Syntax M
91. older blocks This mode thus lets you define the end point of the data held by the digitiser 3 2 6 2 WRITE ONCE Syntax WRITE ONCE Instructs the CD24 to stop writing data to the Flash memory when it is full and to switch to DIRECT mode automatically For example in FIFO mode with WRITE ONCE buffering the station will transmit data to you continuously but also save them in the Flash memory until it is full Once full the digitiser will switch to DIRECT mode and continue transmitting though no further data will be saved This mode thus lets you define the start point of the data held by the digitiser Issue C Operator s Guide 3 3 Digitiser status streams All G ralp digitisers have a separate stream for reporting information about the system such as their GPS and time synchronization status This status information is in plain ASCII text format To see a Status window for any digitiser double click on the Stream ID xxxx00 This stream always has a reported sample rate of 0 samples s During boot up each unit reports its model type firmware revision number its System ID and serial number This information is followed by the number of resets that have occurred and the time of the latest reboot from its internal clock The following lines report the current configuration of the unit s sample rates output taps and baud rates A typical digitiser re boot status message looks like this Status W3420 659100 4 02 10
92. ommunicate with each other For more information see Appendix F Setting up an ad hoc wireless network on page 113 2 3 1 Using Devicelnstaller 1 Download and install the Devicelnstaller utility from the Lantronix Web site at http www lantronix com March 2011 13 CMG CD24 2 Devicelnstaller also requires the Microsoft NET framework to be installed If you do not have this already it can be downloaded at www microsoft com Note Devicelnstaller will not work through routers or across the Internet All the devices need to be on the same network segment as the PC 3 Find out the MAC address of the CD24 s network interface This should be printed on a label on the case 4 If the Data Out port on the breakout box is connected to anything disconnect it NOTE Any connection to the Data Out port on the breakout box will disable networking 5 For Ethernet networking connect the CD24 s ETHERNET port to the the PC s network interface either using a crossover Ethernet cable or through a network hub Note that using a hub you can connect several CD24s to the same PC and configure them all at the same time 6 For Wireless Networking configure your wireless router or access point to use a network name SSID of LTRX_IBSS Disable any security features of the wireless router or access point 7 Run Devicelnstaller 8 Devicelnstaller s main window has two panels a tree on the left with Lantron
93. on Colours Connection Data Proxy Telnet Rlogin Select a serial line Configure the serial line Speed baud Data bits Parity Flow control March 2011 111 CMG CD24 Ensure the following configurations are set Speed baud 9600 Data bits 8 Stop bits 1 Parity None Flow control None To save the settings click on the Session option at the top of the left hand Category menu Enter a suitable session name in the Saved Sessions field then click Save X PuTTY Configuration Category Session Basic options for your PuTTY session Logging Terminal ae Keyboard Serial line Speed Bell COM 9600 Features Connection type Window OBa O Telnet O Alodin OSSH Serial Appearance Behaviour Translation Saved Sessions Selection Direct COM1 39600 8 N 1 Colours AAA Connection Data Proxy Telnet Rlogin SSH Serial Specify the destination you want to connect to Load save or delete a stored session Close window on exit O lways O Never Only on clean exit The next time you start PuTTY your saved session will appear in the list and you can simply double click it to open a new session with the same settings For now click the Open button to start the terminal emulator 112 Issue C Operator s Guide 7 6 Appendix F Setting up an ad hoc wireless network I
94. periment and the sampling rates used You can download data from the internal storage over the RS232 compatible data port directly into Scream or other G ralp data modules over a fast IEEE 1394 FireWire link with optional power or March 2011 7 CMG CD24 if fitted using the Ethernet interface to transfer data over a local area or wireless network 1 1 2 Wireless networking The CD24 can be fitted with an optional 802 11b Wi Fi wireless interface in addition to the Ethernet port This option allows data flow to be established from autonomous installations with a minimum of setting up For temporary deployments instruments and digitisers can be buried in shallow pits with only the antenna above ground You can then contact to each station from a wireless enabled PC running Scream without disturbing the instrument including monitoring real time data and configuring the digitiser lF q a En bo More permanent arrays also benefit from wireless technology particularly in remote areas or where the terrain makes long cable runs impractical ARA AAA NYNO For example stations might be installed with high gain antennae directed towards a visible natural feature which is easier to access 8 Issue C Operator s Guide beg ei Im Onn director al A enter 12 wer bond al geir aranna REIZ 7a WEI MN 1 O 23 han y gt GE va P Data Center At this location which
95. project or calibration data for attached sensors Before uploading an Info Block you must convert it to Intel Hex format Freely downloadable tools exist that can help you with this conversion Similar software is also available from G ralp Systems March 2011 55 CMG CD24 This command is in the extended dictionary to use it first issue the command ok 1 and finish with seal 5 2 5 TEMP Syntax TEMP Display the current temperature measurement from the internal thermometer 5 2 6 ETHER Syntax ETHER ENABLE ETHER DISABLE Enables or disables the optional Ethernet and Wi Fi devices on the CD24 When the Ethernet device is enabled data produced by the CD24 will be sent to the device for transmission across the network unless you have plugged a serial cable into the Data Out port of the breakout box In this case data will be sent over the standard RS232 interface only This is the default behaviour When the Ethernet device is disabled data will always be sent out over the standard RS232 interface and the internal Ethernet Wi Fi module will not be used 5 3 GPS and timing systems 56 5 3 1 GPS TYPE Syntax type GPS TYPE Tells the CD24 which kind of GPS is attached to it type can be one of 0 if no GPS is available or 2 for attached GPS equipment using the NMEA protocol 5 3 2 HR CYCLE Syntax interval HR CYCLE Sets the interval between GPS fixes Under normal operation the system
96. ptions can also be altered in the Configuration setup window For more information on the Control window see section 3 2 on page 37 If you need a more powerful interface to the CD24 you can also issue commands to it directly using Scream s terminal mode A terminal window is opened by right clicking on the digitiser s entry in the list and selecting Terminal The digitiser will stop transmitting data while you have a terminal window open but may still store it in Flash memory depending on the current transmission mode The remaining sections of this chapter describe in detail the configuration options available for the CD24 Many of these options will also be available for other G ralp digitisers 3 1 1 System ID The System ID pane gives information about the digitiser and its internal software and allows you to change GPS timing parameters W3420 DM32 6X Configuration Setup i iol x System ID Joutput Control Triggering Mux Channels Ports System Identifier Serial Number Software revision fw3420 6591 v 243 Sensor Type CMG 6TD y Timing Source GPS NMEA y Enable GPS power cycling at E hours Af UPLOAD X Cancel System Identifier and Serial Number The digitiser type is identified by its system identifier and serial number Every data and status block 26 Issue C Operator s Guide generated by the digitiser includes these two fields at the beginning so that the block s origi
97. recording is achieved using a continuously updated ring buffer of the most Issue C Operator s Guide recent data Any external equipment must have its own buffering capabilities if you need pre trigger data Connect pin A to pin R and pin T to your equipment s trigger signal input Connect the remaining pins as normal If your equipment needs a different voltage you will need to provide a separate voltage source for the triggering system Be careful not to connect two power supplies together Digitiser or digital instrument Trigger action Trigger generator External Equipment Trigger In Power In The diagram above illustrates how to trigger the external equipment using its own power supply which is connected to the trigger input via the normally open relay contacts pins R and T In this configuration the two power supplies are completely electrically isolated courtesy of the relay It is normal practice though not essential to connect the two power supply negative terminals to a common earth point March 2011 91 CMG CD24 92 7 2 3 Using an external trigger source Digitiser or digital instrument Trigger action Trigger generator External Equipment Trigger Out To trigger a digitiser from an external source which provides a triggering voltage you merely need to connect the external trigger voltage to pins U and V of the digitiser as shown above The vo
98. red To close the connection and begin downloading issue the GO command You can pause a download by entering terminal mode and restart with another GO or abort with END DOWNLOAD When you complete a DOWNLOAD without specifying a time period the CD24 marks the latest position with an internal read pointer which can be used as a start point for the next DOWNLOAD with the command ALL TIMES see below 5 8 3 ALL FLASH Syntax ALL FLASH Moves the read pointer to the oldest data held by the CD24 and sets up the DOWNLOAD to transfer all data since then When it has finished the read pointer will be at the end of the downloaded data This command does not alter which streams are to be transmitted you should also specify streams or use the ALL DATA command When you issue ALL FLASH the old position of the read pointer is forgotten Issuing ALL TIMES will not restore it 72 Issue C Operator s Guide 5 8 4 ALL TIMES Syntax ALL TIMES Clears any time selection in force The next DOWNLOAD will begin at the read pointer and end with the newest data When it has finished the read pointer will be moved to the end of the downloaded data 5 8 5 FROM TIME Syntax yyyy mm dd hh mm FROM TIME Instructs the CD24 to transmit only data more recent than yyyy mm dd hh mm where vyyy is a four digit year 1989 2069 mm is the month number 1 12 dd is the day of the month 1 31 hh is the hour of the day 0 2
99. ropriate averaging to reduce the effects of aliasing and cultural noise 4 2 1 Sensor response codes Sensor CMG 40T 1 or 6T 1 1s 50Hz response CMG 40T 1 or 6T 1 1s 100Hz response CMG 40T or 6T 2s 100Hz response CMG 40T or 6T 10s 100Hz response CMG 40T or 6T 20s 50Hz response CMG 40T or 6T 30s 50Hz response CMG 40T or 6T 60s 50Hz response Sensor type code CMG 40 1HZ 50HZ CMG 40 1S 100HZ CMG 40 28 100HZ CMG 40 108 100HZ CMG 40 20S 50HZ CMG 40_30S_50HZ CMG 40_60S_50HZ Units V A lt lt lt lt lt lt Issue C Operator s Guide 5 Command line interface You can connect to the internal software of the CD24 over its output serial port and communicate with it To enter command mode from Scream right click on the digitiser s icon and select Terminal from the menu that pops up A window will open and once the CD24 and computer are communicating properly you will see the prompt ok If you prefer you can use a terminal program of your own such as minicom on Linux or one of the programs detailed in section 7 5 on page 108 to connect to the CD24 Whilst you are in terminal mode data transfer will be interrupted the CD24 may use its Flash memory as a temporary store depending on how you have configured it Some commands such as SET TAPS require a reboot to take effect G ralp Enhanced Acquisition Modules CMG EAM also allow you to send commands
100. s for 1 s of the Z component and 2 s of the horizontal components 5 5 4 LTA Syntax Z secs N secs E secs LTA Sets the length of the long term averaging period in the STA LTA triggering algorithm Z secs N secs and E secs are the time period over which to calculate the average for the Z N and E components respectively Ifa component is not considered by the triggering algorithm see TRIGGERS above the value you specify here will be ignored For example 15 20 20 STA will calculate long term averages for 15 s of the Z component and 20 s of the horizontal components 5 5 5 RATIOS Syntax Z ratio N ratio E ratio RATIOS Sets the ratio of STA to LTA above which a trigger will be declared in the STA LTA triggering algorithm Z ratio N ratio and E ratio are the time period over which to calculate the average for the Z N and E components respectively If a component is not considered by the triggering algorithm see TRIGGERS above the value you specify here will be ignored 64 Issue C Operator s Guide For example 4 10 10 RATIOS will cause the CD24 to trigger if the STA LTA ratio is above 4 for the Z component or above 10 for the horizontal components 5 5 6 BANDPASS Syntax tap filter BANDPASS The CD24 passes the stream s which generate STA LTA triggers through a band pass filter before examining them This filtering does not affect the continuous outputs The corner frequency of the band p
101. s from occurring The diagrams on this and the following pages show the additional connections you will need to make Pins not illustrated should be connected to your power and data systems as normal March 2011 89 CMG CD24 90 7 2 2 Using CD24 triggering to activate external equipment Digitiser or digital instrument Trigger action Trigger generator analala naana External Equipment Trigger In If your equipment can trigger from the same voltage as the CD24 s power supply the simplest arrangement is to use the voltage across the sensor s power supply as the trigger supply Connect the ground pin B to your equipment s trigger return line If your equipment does not have a separate trigger return line consult its documentation for how to apply trigger voltages The diagram above does not show the power supply to either the sensor or the triggered equipment only the triggering system is shown Because a trigger signal may last for only a short time using pins T and B directly to power your external equipment is not normally advisable Ideally the equipment should be continuously powered and listening on dedicated trigger input lines If this is not possible it may be enough to build a control circuit with a time out period which supplies your equipment with power for a suitable minimum length of time whenever a trigger is activated The digitiser cannot anticipate a trigger Pre trigger
102. similar environment to that when the system was last powered most importantly the same temperature the saved control parameters will be appropriate and the system should rapidly switch to the fine control mode The system reports its control status and parameters each minute with error measurements given in nominal timebase units In a stable temperature environment the system should soon settle down showing an offset error of only a few thousand average error lt 100 microseconds and a drift rate under 100 counts lt 1 in 10 48 Issue C Operator s Guide 4 Calibrating the CD24 4 1 Calibration methods Sensors attached to the CD24 can be calibrated using the built in signal generator There are three common calibration techniques used Injecting a step current allows the system response to be determined in the time domain The amplitude and phase response can then be calculated using a Fourier transform Because the input signal has predominantly low frequency components this method generally gives poor results However it is simple enough to be performed daily Injecting a sinusoidal current of known amplitude and frequency allows the system response to be determined at a spot frequency However before the calibration measurement can be made the system must be allowed to reach a steady state for low frequencies this may take a long time In addition several measurements must be made to determine the respo
103. ted as blanks 54 Issue C Operator s Guide 5 2 2 BAUD Syntax port baud rate BAUD Sets the baud rate for one of the serial ports on the CD24 in bytes per second The CD24 has a single port numbered 0 For example 0 19200 BAUD This will reset a standard CD24 to its default configuration The allowable values for baud rate are 4800 7200 9600 14400 19200 57600 and 115200 Note especially that 38400 baud is not available on the CD24 If you have a CD24 with Ethernet or Wi Fi options the settings you configure here are used both on the standard data output port and on the internal port which sends data to the Ethernet Wi Fi module If you change them you will also need to configure the Ethernet Wi Fi module to receive data with the new settings This can be done using the Lantronix Devicelnstaller utility see section 2 3 on page 13 and section 7 4 on page 103 5 2 3 LOAD Syntax LOAD interactive Starts an Xmodem file transfer for new CD24 firmware For full instructions see Chapter 6 page 81 This command is in the extended dictionary to use it first issue the command ok 1 and finish with seal 5 2 4 LOAD Syntax LOAD I interactive Starts an Xmodem file transfer for a new Info Block This block can be up to 1 K long and will automatically be transmitted from the CD24 when it first powers up You can use the Info Block to store any information you like for example about the digitiser your
104. teger below 16 whose binary bits represent the Z 1 N 2 E 4 and auxiliary 8 components respectively Thus for example 1 TRIGGERS will trigger from the Z component only 1 6 TRIGGERS will trigger from either the N or E components 2 4 6 7 TRIGGERS will trigger from any of the three components 1 2 4 7 O TRIGGERS will disable the triggering system 5 5 2 TRIGGERED Syntax tap components TRIGGERED Selects which component or components will be output when a trigger is generated and at which tap sample rate tap is the tap number at which to output the triggered stream You can set which taps output which sample rate using the SAMPLES SEC command described above components is an integer below 16 which represents which components to output in the same fashion as in the TRIGGERS command above March 2011 63 CMG CD24 These two commands have similar names remember that a component TRIGGERS the system whilst taps and components can be TRIGGERED 5 5 3 STA Syntax Z secs N secs E secs STA Sets the length of the short term averaging period in the STA LTA triggering algorithm Z secs N secs and E secs are the time period over which to calculate the average for the Z N and E components respectively If a component is not considered by the triggering algorithm see TRIGGERS above the value you specify here will be ignored For example 1 2 2 STA will calculate short term average
105. tered in the form year month day hour minute second padding each field with zeroes so that they line up with the guide above If the CD24 does not recognize the time format you have used it will output and error message March 2011 57 CMG CD24 This setting will be overridden when the GPS system next synchronizes the clock 5 3 6 TIME Syntax TIME Displays the current time as held in the system s real time clock If a GPS is attached this will be synchronized to it The output is given in the form year month day hour minute second ok 5 3 7 LEAPSECOND Syntax yyyy mm dd LEAPSECOND Manually notify the digitiser of an upcoming leap second This command is not normally necessary since GPS already has support for leap seconds However some units do not properly interpret the GPS signals See SQPATCH below The leap second is taken to be at the end of the day yyyy mm dd 5 3 8 SQPATCH Syntax SOPATCH ENABLE SQPATCH DISABLE Enables or disables the internal patch for older GPS receivers based on Trimble Lassen SQ units These units misinterpret the GPS system s advance notification of a leap second and consequently run one second slow until the leap second occurs With SQPATCH enabled the time reported by the digitiser is offset by one second to counteract this problem If you have set LEAPSECOND above SQPATCH will automatically be disabled when the leap second occurs and the digitiser will then run norm
106. tervals chosen the data in the triggered streams will begin on a whole second 3 1 4 Mux channels The CD24 provides a range of slow rate auxiliary channels for reporting the system s state of health and other diagnostic information known as multiplexed Mux channels The number of Mux channels depends on the model and configuration of your digitiser Generally three channels are used to report the sensor mass position and another measures the internal temperature of the digitiser In addition to these up to 12 Mux channels may be supplied for the user s own purposes Some digitisers have a separate AUXILIARY port which can be used as input for these channels The collection and transmission of Mux channels is controlled using the Mux Channels pane Jal Ports Auxiliary Inputs System SOH Channel 0 MV Z Mass Position Channel 1 V N S Mass Position Channel 2 V E W Mass Position Channel 3 IV Calibration Signal Input Channel 4 Channel 5 Channel 6 Channel 7 Temperature Pressure if fitted seen 4 1 mkt TETI If a tick is placed in the box next to a channel its data will be collected and transmitted as a data stream in GCF format just as with the normal data channels To indicate that the data come from a Mux March 2011 35 CMG CD24 channel the Stream ID will take the form MX where M stands for Mux and X is a hexadecimal integer i e 0 9 and A F for 10 through 15 The Z N S an
107. to go back to Devicelnstaller to find out the new IP address March 2011 19 CMG CD24 2 3 4 Installing wireless hardware The small antenna supplied with the CD24 is adequate for initial testing or temporary installations with an access point within 50m of the digitiser To send data over a larger distance or if the line of sight between the antenna and the access point is blocked you will need to use a larger and more powerful antenna In infrastructure mode you can reduce the power requirements by using a directional antenna pointed at the location of the access point The access point does not need to be permanently present For example you could set up an array of CD24 digitisers with antennas pointed towards a prominent natural feature with line of sight to all the digitisers and access them all from this location using a laptop PC 2 4 Configuring the digitiser 20 Autonomous CD24 installations will need to be configured before deployment You can do this either using the graphical interface provided by Scream see Chapter 3 on page 25 or over a terminal connection see chapter 5 on page 53 Both methods provide full access to the configuration options of the CD24 In particular the CD24 can operate in a number of transmission modes These modes determine whether the unit stores data in its on board Flash memory sends it over the serial link in GCF format or does some combination of these
108. ugh the initial O2E varies with manufacturer Suitable mating connectors have part numbers like 12 10S and are available from Amphenol ITT Cannon and other manufacturers K Auxiliary serial port RS232 transmit Wiring details for the compatible socket _12 10S as seen from the cable end i e when assembling 102 Issue C Operator s Guide 7 4 Appendix D Advanced network configuration The CMG CD24 uses an embedded Lantronix networking module to provide Ethernet and WiFi functionality For Ethernet only digitisers an WiPort NR module is used For digitisers with WiFi support a WiPort is used Both the WiPort NR and the WiPort have serial accessible configuration systems which can be used to configure them in the event that communication over a network is lost ae ae Port 10002 y CD24 config Port 9999 Network digitiser Device engine detect le Port 10001 gt Aux console f Serial Data Out The Lantronix modules have two serial channels Channel 2 is used for seismic data which is typically sent over the network on TCP port 10002 although this is configurable Channel 2 is connected internally to the CD24 s data output unless you have connected a serial data cable from the breakout box to a computer If a device is detected on the normal serial output the CD24 will only send data streams through Data out and not through the networking module The digitiser will still
109. up external triggering oomoconononcninnanoronarononanocaronsnnonss 88 Zal CV CUVICW iad ve oosies vais paas one Sees O 88 7 2 2 Using CD24 triggering to activate external equipment eee 90 7 2 3 Using an external trigger SOUICO circadiano da dd nents 92 Operator s Guide 7 2 4 Triggering several CD24 digitisers simultaneously 93 7 2 5 Combining CD24 and DM24 digitisers in a single array eee 95 7 3 Appendix C Connector PIES orando id ri Ae 96 7 3 1 DMSIHSer COMMECIOLS dto ca 96 7 3 2 Breakout box CONN ECIONS ricardo iaa 100 7 4 Appendix D Advanced network configuratiON oooocccnnnononancnnnnonanannncnnnnnns 103 7 4 1 Accessing the configuration menu via the serial Interface 104 7 4 2 Configuring the network interfaces c cccssseesssseeseecessersoesereeseees 104 7 4 3 Configuring the Ethernet ports siiicseitssscistessediosivetiamndiohomtavrehsseeveventebns 105 7 4 4 Configuration of the WiFi interface ccssessecssssecosssneensebeasseersenenes 106 7 5 Appendix E Using third party terminal emulators 108 7 5 1 Hyperterminal as provided with Windows XP ceeesessseeeeeeeeenees 108 7 5 2 Using Hyperterminal with Windows Vista or Windows 7 006 110 7 5 3 Using PUD A a a omen enna 110 7 6 Appendix F Setting up an ad hoc wireless netwoTk ccinnccconnnnnnccc s 113 7 7 Appendix Gs SPCCUICAONS ii 116 8 Revision history eissaia aiiin iai iii iias 117 March 20
110. wed new data to overwrite the old If there is no disc connected or the cable is faulty you will see the message FW lerr 80 Issue C Operator s Guide 6 Updating the CD24 The firmware of the CD24 can be updated remotely over its output port In Scream s main window right click on the digitiser s icon and select Terminal from the pop up menu If this fails connect the digitiser directly to a serial port and right click on the serial port instead Check that there is two way communication with the digitiser by pressing Enter The digitiser should reply with ok on a new line Type ok 1 to enable advanced commands The digitiser will reply with a message describing the current firmware version G Terminal ioj x sk nz 1 Cura p Agstems Lod UN 4 524 Yv 111 ok load ala Pe If the firmware needs updating 1 Type load and press ENTER The digitiser will display load C and then wait for up to 10 seconds while the device is prepared for file upload 2 Right click on the terminal window and select Send file Select file to transmit 1xj Look in 3rd Issue 22 01 02 Al ex sa upper_120 hex la upper_124 hex la upper5 hex a upper_120 zip a uppert hex la upper6 hex la upper_121 hex a upper 0 hex sa upper hex sa upper_122 hex laa upper 1 hex cD upper_122 zip lus upper2 hex sa upper_123 2 hex aa upper3 hex a upper_123 hex la upper4 hex p y File
111. will power on the GPS system every interval hours and Issue C Operator s Guide synchronize its internal clock with GPS timing signals Once the internal clock is sufficiently close to GPS time the GPS system will be automatically powered down for another interval hours Setting interval to 0 will make the CD24 leave the GPS on continuously This is recommended if your installation has access to mains power To find out the current HR CYCLE setting issue HR CYCLE 5 3 3 XGPS Syntax 0 XGPS 1 XGPS Manually switches on or off the GPS system overriding the HR CYCLE command see above If you issue 0 XGPS the digitiser will switch off the relay 1 XGPS will switch it on Once the GPS system is switched on the digitiser will automatically check the timing signal and synchronise its internal clock before switching off the GPS and returning to normal operation 5 3 4 SET RTC Syntax year month day hour minute second centisecond SET RTC Sets the system s real time clock This time will be used from power up until it is corrected by an attached GPS If you are not using GPS but are synchronizing from some other time source you will need to re issue this command regularly to ensure the CD24 does not drift 5 3 5 SET CLOCK Syntax SET CLOCK interactive Sets the internal clock SET CLOCK Enter Date amp Time YYYY MM DD HH MM SS 2006 02 01 12 53 25 Clock set 2006 2 1 12 53 27 ok The time should be en
112. window to change the values of the March 2011 31 CMG CD24 STA and LTA periods together with the Ratio without restarting the digitiser see section 3 2 on page 37 Since it is not generally advisable to trigger from broadband data the digitiser provides a set of standard bandpass filters to apply to the data streams before they are tested for the trigger condition This filtering serves to maximise sensitivity within the frequency band of interest and filter out noise outside this band You can select which bandpass filter to use from the Bandpass filter drop down menu The corner frequencies of the pass band of the filter are determined by the Nyquist frequency which depends on the sample rate of the triggering data The three filter options have pass bands between 10 and 90 between 20 and 90 and between 50 and 90 of the data s Nyquist frequency respectively The possible filter configurations are shown in the following table Bandwidth1 Bandwidth 2 Bandwidth 5 Rate samples s Hz Hz Hz 1000 50 450 100 450 250 450 500 25 225 50 225 125 225 400 20 180 40 180 100 180 250 12 5 112 5 25 112 5 62 5 112 5 200 10 90 20 90 50 90 100 9 45 10 45 25 45 50 2 5 22 5 5 22 5 12 5 22 5 40 2 18 4 18 10 18 25 1 25 11 25 2 5 11 25 6 25 11 25 20 1 9 2 9 5 9 10 0 5 4 5 1 4 5 2 5 4 5 8 0 4 3 6 0 8 3 6 2 3 6 5 0 25 2 25 0 5 2 25 1 25 2 25 4 0 2 1 8 0 4 1 8 1 1 8 2 0 1 0 9 0 2 0 9 0 5 0 9 1 0

MAN-C24-0001 - CMG-CD24 Operator`s Guide

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