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CMG-DCM
Table of Contents
1 Introduction............................................................................................................................5
1.1 Inside the DCM................................................................................................................7
Serial port services.............................................................................................................8
Network services...............................................................................................................8
2 Installing the CMG-DCM....................................................................................................10
2.1 Overview........................................................................................................................10
2.2 Power supply..................................................................................................................10
2.3 Connecting to a single computer....................................................................................11
Connecting over a serial link...........................................................................................11
Connecting over Ethernet................................................................................................12
Using an internal modem.................................................................................................13
Connecting over USB......................................................................................................13
2.4 Connecting to a local network........................................................................................14
Wi-Fi................................................................................................................................16
Connecting to the Internet................................................................................................16
2.5 Connecting digitizers and external hardware.................................................................17
2.6 Setting up the CMG-DCM.............................................................................................17
Web setup........................................................................................................................18
3 Usage.....................................................................................................................................21
3.1 General notes..................................................................................................................21
3.2 The DCM as a data store................................................................................................21
3.3 The DCM as a GCF data source.....................................................................................25
Accessing the DCM command line through gcf_out.......................................................26
Sensor arrays....................................................................................................................27
3.4 The DCM as a network data hub....................................................................................28
Communicating with digitizers.......................................................................................29
Data storage and retrieval................................................................................................31
Real-time data transmission.............................................................................................33
3.5 Troubleshooting DCM installations...............................................................................35
I cannot connect to the DCM's DATA OUT port using a terminal program...................35
I cannot see the DCM's Web site over HTTP or HTTPS................................................36
I cannot connect to the DCM's Scream! server................................................................36
I cannot GCFPING the DCM's Scream! server...............................................................36
I can GCFPING the DCM's Scream! server, but no data appears...................................37
The DCM is not receiving any data streams....................................................................37
The DCM is receiving streams, but they do not contain any data...................................38
The DCM receives streams, but gaps appear in the data some minutes after boot-up....39
The DCM receives streams, but 2-minute gaps appear in the data at 4-hour intervals.. .39
2 Issue A