Guralp-systems CMG-DCM User Manual

CMG-DCM / AMData Communications ModulesUser's guidePart No. MAN-DCM-0001Designed and manufactured byGüralp Systems Limited3 Midas House, Calleva

CMG-DCM Data Communications Modulemessages.In addition, the DCM can be configured to act as a data client, receiving GCF and C

CMG-DCM Data Communications ModuleIf all these methods are disabled, you may still be able to connect to the DCM over a serial link using getty (see s

Operator's guide• the content of the file.The Web interface does not check that the content of the files will be understood. You should ensure th

CMG-DCM Data Communications Modulewhen it authenticates itself to other systems, and also when it authenticates other systems to i

Operator's guide6.13 AdministratorsThis page allows you to add new users to the DCM, and change the passwords of existing users.Users of the DCM

CMG-DCM Data Communications ModuleYou should be shown an acknowledgement screen, indicating that the new user account has been created. The user will

Operator's guide7 Configuring digitizersTo configure a digitizer, open the Configuration – Serial Ports page and find the entry for the seria

CMG-DCM Data Communications Module7.1 General digitizer settingsBaud rate : The speed at which the digitizer will communicate with the DCM, in bytes

Operator's guideGPS Power Cycle : If you have selected Garmin GPS as the timing source, above, this setting determines how often

CMG-DCM Data Communications ModuleThe table to the right shows the current setting of the digitizer.For example:In this example, under normal conditio

Operator's guide7.3 Trigger criteriaThe triggering algorithm applies a simple short-term average / long-term average calculation to the

Operator's guide2 Installing the CMG-DCM2.1 OverviewThe DCM is effectively a low-power Linux computer dedicated to seismic data

CMG-DCM Data Communications ModuleThe Ratio column determines by what factor the STA and LTA must differ for the trigger to be passed. Finding the ra

Operator's guideUsually, the values of the STA and LTA periods, and of the Ratio, will be the same for all checked channels. For convenience, Scr

CMG-DCM Data Communications ModuleTap # Rate (samples/s) Bandwidth 1 (Hz) Bandwidth 2 (Hz) Bandwidth 5 (Hz) 2 0.1 – 0.9 0.2 – 0.9 0.5 – 0.93 25 1.25

Operator's guide7.5 Sensor mass controlThere are three commands which can be relayed to an instrument through the DCM to control

CMG-DCM Data Communications Module8 Inside the DCMThe DCM is a fully-functional, Linux-based computer system especially designed for han

Operator's guideOnce the data is stored on the DCM, whether in Flash memory or on the hard disk, it can be retrieved• by a remote computer

CMG-DCM Data Communications Module8.1 File systemsThe DCM uses the standard Unix/Linux file naming conventions. The operating system resides in two bl

Operator's guidemoving files when necessary. This program ordinarily runs constantly in the background. However, a user can use the command disk

CMG-DCM Data Communications Moduleyou can disable it using the net.remoteaccess.ssh configuration option.In addition, if you have so configured it, yo

Operator's guidecertain options are numbers), but will not otherwise make sure that your change makes sense.gcfgdbget option-name-or-prefix : Ent

CMG-DCM Data Communications Modulepossible, since it is easy to accidentally short the pins of a male connector. Attached digi

CMG-DCM Data Communications Moduleperformed on that database instead.For a detailed description of the configuration options in the database, see Chap

Operator's guidewill ask you if you want to quit without resetting the connection. Choose yes to return the digitizer to da

CMG-DCM Data Communications Modulewhere port and baud are in decimal, and Key in hexadecimal. The related command serialmap -k returns the key I

Operator's guidecentred;• which, if any, of the channels are currently being calibrated (the channel appears with a + if this is the case).Tamper

CMG-DCM Data Communications Module• over a serial link to the DATA OUT port (115200 baud, 8 data bits, no parity bit, 1 stop bit, no flow control), o

Operator's guideThe firmwareReinstalling the firmware from scratch is a more involved process, and you should only need to do it if the root or b

CMG-DCM Data Communications Modulewhich you will be using.If the device has several serial interfaces, the command serialmap may he

Operator's guide9 Connector pinouts9.1 Modular DCM unitsPORT A and BThis is a standard 10-pin mil-spec socket (02E-12-10S). The pinout is such th

CMG-DCM Data Communications ModuleE RS232 DTRF RS232 DSRG RS232 groundH RS232 CDJ RS232 receiveK RS232 transmitUSB connectorThis is a standard 6-pin m

Operator's guide9.2 Integrated DCM unitsDM/AM module outputThis is a standard 32-pin mil-spec plug (02E-18-32P).Pin FunctionD Power +10 to +30 VE

Operator's guideWindows, can be used for this.3. Configure the baud rate of the serial link. By default, the DCM uses a baud rate of 115200, with

CMG-DCM Data Communications Module10 Sensor and digitizer typesThese codes are used in situations where the DCM needs to know the response properties

Operator's guide10.2 Digitizer type codesDigitizer Digitizer type codeCMG-DM24 mk2 (3- or 6- channel)CMG-DM24CMG-3TD or 5TD using DM24 mk2 module

CMG-DCM Data Communications Module11 Revision history2006-12-13 F Added datatransfer.scream.server.udp_push2006-11-21 E Added new recording options; d

CMG-DCM Data Communications ModuleAllow a short time for the DCM to reconfigure the network.3. On your computer, select Start Control Pan

Operator's guideconnect it directly to any computer with a USB socket. When this is done, the computer treats the module as if it were a standard

CMG-DCM Data Communications Modulechange the password as soon as you can with the command passwd3. Connect the DCM's NETWORK port to your

Operator's guide6. If you are connecting the DCM to a single computer which does not run a DHCP server, you will need to configure that computer

CMG-DCM Data Communications Moduleand one using 802.11 connections, or a mixture of the two.Once the 802.11 system is running, you will

Operator's guideports are connected to Güralp DM-24 digitizers, whilst the DATA OUT port connects the DCM to a computer or serial modem. However,

CMG-DCM Data Communications ModuleTable of Contents1 Introduction...

CMG-DCM Data Communications ModuleWeb configuration interface. An initial root username and password will have been supplied by Güralp S

Operator's guide• the current Linux network and DNS configuration;• unique IDs for the hardware boards making up the DCM; and• the name and

CMG-DCM Data Communications ModuleChapter 6. Some important points to note are:• The DCM uses internal serial and Ethernet ports to co

Operator's guideWhen you are done, click Configure instrument to submit the changes to the digitizer and reboot it.See “Digitizer output control”

CMG-DCM Data Communications Module3 UsageThe DCM can be integrated with any system where seismic data needs to be collected, or converted from one for

Operator's guide2. Connect the DATA OUT port to a source of 12 V DC power.3. Connect the unit to your local network as described in Section 2.4,

CMG-DCM Data Communications ModuleSlide the disk out and replace with another Lacie U&I drive, or any brand of IDE / USB or IEEE 1394 2.5” drive y

Operator's guideThis process may take several minutes to complete.8. Double click on the drive's entry to browse the files inside and copy t

CMG-DCM Data Communications Module11.In the next window, check that the correct hardware is shown, and click OK to confirm.12.You can now remove

Operator's guideWith a sufficiently fast serial link, you can instruct the DCM to send incoming data directly to a GCF-compatible cli

Operator's guide5.7 SEED name mappings... 755.8 AutoDRM...

CMG-DCM Data Communications ModuleDCM. If it is not shown, you may have to 'unfold' the tree to reveal it. The digitizer(s) attached

Operator's guidethe inputs from an array of sensors.Here, DATA OUT ports with gcf_out as the service output data to the serial inputs of another

CMG-DCM Data Communications Module3.4 The DCM as a network data hubThe most flexible way to operate the DCM is as a fully independent machine on your

Operator's guideinterface by typing its IP address into any browser, e.g.https://192.168.0.2/By default you can use either http: or https: URLs t

CMG-DCM Data Communications Modulethe commandgcli port-number commandIn these commands, port-number is the port number and port-name the

Operator's guideThe DCM allows you to record in several formats simultaneously, if you wish; you should make sure that you have the capacity to s

CMG-DCM Data Communications ModuleReal-time data transmissionYou can use the DATA OUT port (or any of the DCM's serial ports) in several ways, de

Operator's guideDCM, separated by a colon : (e.g. 192.168.0.2:12345)5. Test communications by right-clicking on the newly-added serve

CMG-DCM Data Communications Moduleto upgrade, contact Güralp Systems.In order for the AutoDRM system to work, the module must be able to send and rece

Operator's guidegcf_out service on that port and has provided you with a FORTH compatibility interface. TypeGETTYand press E

CMG-DCM Data Communications Module11 Revision history...

CMG-DCM Data Communications Module• Check that the DCM's HTTP(S) server is enabled by issuing one ofgcfgdbset net.remoteaccess.allow.http yesgcfg

Operator's guideviewer window.If you do not want to use the DCM's Web site, you can find out the number of GCF blocks the DCM ha

CMG-DCM Data Communications Module• If the digitizer is not responding at all, check the power supply to the digitizer and the cable between it and th

Operator's guideThe DCM receives streams, but 2-minute gaps appear in the data at 4-hour intervals.After a reboot, the DCM takes around 2 minutes

CMG-DCM Data Communications ModuleBefore your DCM can start sending authenticated data, it must• generate a cryptographic key pair;• request a certifi

Operator's guideinfo::logging into zeroized cardinfo::state: Uninitializedinfo::logging into unitialized cardinfo::loading initialization valuesi

CMG-DCM Data Communications Moduleyou can create text files on the local computer and transfer them to the AM module using scp or a simi

Operator's guideIf it reports that the key does not match the certificate, you may have attempted to load a certificate valid for the wrong token

CMG-DCM Data Communications Moduleto the beginning of the file.13.Restart the CD1.1 transmitter with the command killall -HUP cd11sf.

Operator's guideare used by openssl to generate prompt strings and need not be changed. If you need to enter two separate values for the same key

Operator's guide1 IntroductionThe CMG-DCM is a versatile Linux-based module for storing and transmitting data captured using Gü

CMG-DCM Data Communications Modulehas the formatkey-id:days-since-epoch:seconds-since-day-startwhere days-since-epoch is the number of days elapsed si

Operator's guide4 ToolsThe menu bar of the DCM's Web site is divided into four sections.• At the top is a banner identifying the DCM, with a

CMG-DCM Data Communications ModuleUptimeThis section displays the time the DCM last rebooted and calculates how long it has been running since that ti

Operator's guide 3 open (never) Wed Jul 7 16:04:48 2004 4 open (never) Wed Jul 7 16:04:48 200

CMG-DCM Data Communications ModuleUnique IDsThis section contains unique identifiers for each of the hardware boards inside the DCM.

Operator's guideprocess and run a new one. This is useful if a process appears to have stopped responding.Restarting some processes may cause dat

CMG-DCM Data Communications ModuleIf you cannot see any data in the Data Viewer, you should check first that• some streams have been checked in the

Operator's guide• a zeroing button, which attempts to centre all the selected streams in the display.The stream listBelow the d

CMG-DCM Data Communications ModuleThis page is updated every 10 minutes. If you make a change to your installation, you will need to wait 10 minutes b

Operator's guideFinally, at the bottom of the page, is a table headed Shared Memory Diagnostics. This table lists the number of blocks which have

CMG-DCM Data Communications ModuleYou can retrieve data from a DCM's disk at any time by removing it from the module and at

CMG-DCM Data Communications Module4.6 Flash filesThis link opens a page similar to Disk files, but which explores the DCM's internal Flash memor

Operator's guideBy default, the module looks for a connected USB hard disk to use as its primary storage medium. If no suitable sto

CMG-DCM Data Communications ModuleDCM will report Disk is already in use.• Click Cancel, or navigate elsewhere, to cancel the format.Check disk filesy

Operator's guideEach entry includes, in order:• the date and time of the log message,• a code [Xx] describing the type of program and the importa

CMG-DCM Data Communications Module5 Data transferYou can retrieve data from the DCM using a variety of standard seismic network

Operator's guideyes if you want to be able to use Scream! to configure digitizers attached to the DCM's serial ports.

CMG-DCM Data Communications Moduleyour instrumentation whilst minimizing the bandwidth used.datatransfer.scream.server.coalesce : Some digitizers are

Operator's guideThe following configuration options are available:datatransfer.seedlink.server.network : The default 1- or 2-character

CMG-DCM Data Communications ModuleTo restart the SeedLink server, browse to the Tools – Process Overview page and find the entry fo

Operator's guidedssserver fulfils requests by following this procedure:• Receiving a valid DSS_REQ packet, dssserver will send a DS

Operator's guideThis form of DCM uses an integrated 26-pin connector to communicate, rather than having separate ports.A DCM in

CMG-DCM Data Communications ModuleThe options on the Data transfer – DSS page are:datatransfer.dss.server : Set this to on to run the server; off to d

Operator's guidedatatransfer.cd1.sender : Select on to activate the CD1.0 sender. If you do not want the DCM to transmit CD1.0 data, select off a

CMG-DCM Data Communications Module5.5 CD1.1The CD1.1 format is an evolution of CD1.0 used by many NDCs, using different settings from CD1.0. The DCM h

Operator's guidedefault: to make the DM24 output a CD stream, connect to its console and issue the command+MONITORThis can be done from the DCM c

CMG-DCM Data Communications ModuleThe cryptographic hardware required to produce authenticated CD1.1 streams is installed only in Authentication Modul

Operator's guide/etc/libcd11/slotxx.kid and /etc/cd11sf.cfghigh-byte and low-byte : The two CNSN stream identifier bytes, expressed as decimal

CMG-DCM Data Communications ModuleThe table on this page shows all the streams which have SEED name mappings. If a mapping is defined for a stream, se

Operator's guide• Enter values into the seed.net, seed.sta and seed.cha boxes to change the mapping. If one of these values is missing, serv

CMG-DCM Data Communications Moduletable without changing anything.The SEED name mappings are used by MiniSEED, SeedLink and DSS. SEED names are also u

Operator's guide5.9 HTTP serverIn addition to configuring the DCM and instruments attached to it, you can also instruct the on-board Web server t

CMG-DCM Data Communications Module1.1 Inside the DCMThe DCM's configuration is maintained by an internal database. All of the flexibility of

CMG-DCM Data Communications Module6 ConfigurationAll DCM modules feature an on-board Web server, which you can use to set up the unit. When you first

Operator's guideseveral types of DCM or AM (Authentication Module) will find that each unit offers a different range of configuration options, ac

CMG-DCM Data Communications Module6.2 Serial portsClicking on Configuration – Serial ports displays the serial port table.Every serial port on the DCM

Operator's guideConfigure : This column contains links allowing you to configure each port, and the digitizer attached to it (if there is one.)Co

CMG-DCM Data Communications Modulemodem which is operating in raw mode (i.e. which does not support the standard AT modem commands.) This

Operator's guidenormally operate at rates up to 57600 baud (~56 kbits/s), although the telephone or transmission lines may not support such a hig

CMG-DCM Data Communications ModuleThis option has the same effect as the MS-GAP command on a DM24.If the port is not running the gcf_out

Operator's guideIf you want to check that the hard disk is working, explore its contents, or format it, you should use the Tools – Disk tools pag

CMG-DCM Data Communications Moduledisk.recordas.miniseed : Set this to yes to have the DCM record files in miniSEED format.MiniSEED uses the FSDN SEED

Operator's guidesystem log onto the disk. The system log is split up into time blocks in the same way as the other data (see disk.recordinterval,

Operator's guide• Both mgetty and mgetty-r can recognize incoming PPP connections and will automatically run a PPP daemon if you a

CMG-DCM Data Communications Moduledisk.recordinterval : The DCM writes all the data streams it has been instructed to record into a file in its Flas

Operator's guideFiles are given names in the formatyyyyjjjThhmmss-wwwww-WWWWW-ssssssss.eeewhere yyyy is the current year, jjj is the day of the y

CMG-DCM Data Communications ModuleSEED format. The DCM will only write SEED volumes for streams mentioned in this file.Clicking SEED conf

Operator's guide• a SEED location name for the instrument (or leave blank to have the DCM generate one automatically);• a SEED channel name for t

CMG-DCM Data Communications Modulepage and find the entry for the seedrecorder process. Click the Restart link in this entry.6.5 Eth

Operator's guidehas no effect.If you are configuring the DCM over an SSH connection, changing any of the remaining options will cause you to lose

CMG-DCM Data Communications ModuleThe routes are specified as arguments to the standard Unix route command. For example, if you wanted the D

Operator's guidenet.dns.search : If the DCM encounters an unqualified hostname in any of its configuration settings, or in a command, it will l

CMG-DCM Data Communications Modulenet.mail.in.port : The number of the port to connect to on the mail server. This generally depends on the protocol

Operator's guidethe net.mail.out.type drop-down menu and ignore the remaining settings.Not all DCMs have mail capabilities installed.