CMG-DM24

The CMG-DM24 is a high-quality digitizer module with full 24-bit resolution, designed for data quality and durability. Both 3- and 6-component models are available.

Features

3 or 6 low noise 24-bit ADCs
Additional full-rate data channel for user signals and calibration
Low power 32-bit DSP and ARM processor (<1 W recording 4 channels at 100 samples/s)
Multiple concurrent data rates up to 1000 samples/s
STA/LTA ratio, level, external and software triggering
UTC timestamped data from attached GPS receiver
8 environmental channels with 20-bit resolution (3 × mass position, temperature, 4 × user)
Full control of Güralp broadband seismometers
Calibration using step, sinusoid or pseudo-random broadband noise signals
64 Mb Flash memory with fast FireWire data transfer
Fully configurable using Güralp data modules and software

Options

Extended Flash memory up to 8 Gb
8 additional environmental channels
Further full-rate channels available using daisy-chaining
Ultra-low noise option at a small cost in power
Borehole form factor
Integrated module form factor can be retrofitted to existing sensors (3T to 3TD, 40T to 40TD)
CMG-DM24S3DCM all-in-one digitizer, data logger, serial output device and network data centre
CMG-DM24S12AMS strong-motion acquisition system
LCD state-of-health display
FireWire interface for external storage devices
USB memory stick interface (case lid can be closed with memory stick in place)

CMG-DM24mk3 with both optional LCD display and optional FireWire interface

Performance

Performance of the standard CMG-DM24.

Performance of the low noise CMG-DM24 option.

The CMG-24 uses the latest 24-bit ADC technology to provide multiple concurrent sample rates from 1000 samples/s down to 1 sample/s. The DSP chip set and digitizer design give the DM24 a first-class noise profile. Input-terminated noise tests demonstrate that the performance of the DM24 at 40 samples/s exceeds 22.5 bits, giving it a maximum potential dynamic range of over 137 dB. The noise floor is further reduced to over 24 bits at slower sample rates.

The low noise variant of the DM24 has a maximum potential dynamic range over 141 dB, exceeding 23 bits of resolution at 40 samples/s. To take advantage of this resolution, the output word length is increased to 32 bits. The low noise variant draws slightly more power than the standard model owing to the increased processing required.

CMG-DM24

Features

Options

Performance

CMG-DM24 news

Firmware for the CMG-DM24 mk3

Firmware for the CMG-DM24 mk2 Borehole

Firmware for the CMG-DM24 mk2



Home Products CMG-3T CMG-3TD CMG-3ESP CMG-3ESP Compact CMG-3ESPD Compact CMG-5T CMG-5TD CMG-5T Compact CMG-40T CMG-6TD CMG-CD24 CMG-DM16 CMG-DM24 CMG-EAM CMG EDU All products Software New installations Customer support About us	CMG-DM24 CMG-DM24 The CMG-DM24 is a high-quality digitizer module with full 24-bit resolution, designed for data quality and durability. Both 3- and 6-component models are available. Datasheet Manual (PDF) Manual (HTML, online) Quick start sheet Features 3 or 6 low noise 24-bit ADCs Additional full-rate data channel for user signals and calibration Low power 32-bit DSP and ARM processor (<1 W recording 4 channels at 100 samples/s) Multiple concurrent data rates up to 1000 samples/s STA/LTA ratio, level, external and software triggering UTC timestamped data from attached GPS receiver 8 environmental channels with 20-bit resolution (3 × mass position, temperature, 4 × user) Full control of Güralp broadband seismometers Calibration using step, sinusoid or pseudo-random broadband noise signals 64 Mb Flash memory with fast FireWire data transfer Fully configurable using Güralp data modules and software Options Extended Flash memory up to 8 Gb 8 additional environmental channels Further full-rate channels available using daisy-chaining Ultra-low noise option at a small cost in power Borehole form factor Integrated module form factor can be retrofitted to existing sensors (3T to 3TD, 40T to 40TD) CMG-DM24S3DCM all-in-one digitizer, data logger, serial output device and network data centre CMG-DM24S12AMS strong-motion acquisition system LCD state-of-health display FireWire interface for external storage devices USB memory stick interface (case lid can be closed with memory stick in place) CMG-DM24mk3 with both optional LCD display and optional FireWire interface Performance Performance of the standard CMG-DM24. Performance of the low noise CMG-DM24 option. The CMG-24 uses the latest 24-bit ADC technology to provide multiple concurrent sample rates from 1000 samples/s down to 1 sample/s. The DSP chip set and digitizer design give the DM24 a first-class noise profile. Input-terminated noise tests demonstrate that the performance of the DM24 at 40 samples/s exceeds 22.5 bits, giving it a maximum potential dynamic range of over 137 dB. The noise floor is further reduced to over 24 bits at slower sample rates. The low noise variant of the DM24 has a maximum potential dynamic range over 141 dB, exceeding 23 bits of resolution at 40 samples/s. To take advantage of this resolution, the output word length is increased to 32 bits. The low noise variant draws slightly more power than the standard model owing to the increased processing required. CMG-DM24 news Firmware for the CMG-DM24 mk3 Updating digitizers with 4 or 7 channels including `X` channel; also 3ESP Compact digital instruments and all other digital instruments manufactured after 2005. Firmware for the CMG-DM24 mk2 Borehole Updating borehole DM24 digitizers manufactured before 2005. Firmware for the CMG-DM24 mk2 Updating DM24 digitizers with 3 or 6 channels, also DM24S12, DM24S12AMS, 3TD, 3ESPD and 40TD instruments manufactured before 2005. More articles on this topic...