The SUMMIT, made by Deutsche Montan Technologie (DMT), is a multi-channel digital recording system. The system consists of single-channel recorders (Remote Units, RU) connected along a two-wire Data Link, and a Central Unit (PC-board or workstation). Sensor adaptors are available for geophone chains (PE-7 connector) and for the S_ MARK L-4C-3D geophone.
The information is stored first in the Remote Unit on nonvolatile RAM, and then transmitted to the Central Unit on request.
Remote Unit ID Numbers are set by a SUMMIT handheld terminal. Parameter SetUp, Line Check, and Data Retrieval are controlled from the Central Unit.
Long Data links require Repeater Units (RP) every 250 m. All Repeater Units also implement the function of Line Distributor Units.
An 'intelligent RP' is currently tested. It will make available the same remote control functions as given for the Remote Units (RU).
Pool Contents
Remote Units 96 Units: 2 Channels, 48 kSample/Channel, external power supply
Repeater and Distributor Units, 80 Units: Repeater (for max. cable length of 250 m)
Data Link Cable 40 drums: 250 m, built-in line terminator at each end 10 drums: 120 to 230 m, spare cable
Parameters
Input Signal
Channels 2
Clipping 4 Vpp @ low preamp (0 dB)
Digital Signal
Sample Interval 1/32; 1/16; 1/8; 1/4; 1/2; 1; 2; 4; 8 ms
Format 4 Byte, SEG2
Digitizer 24-bit Delta-Sigma ADC
Preamplifier 1 or 8 (0 dB resp. 18 dB)
Time Keeping
Clock 1*10e-6
Synchronisation Record Start pulse to all RUs by Central Unit
Data Storage
RAM 48 kSample/channel
Physical Parameters
Battery Power Usage (external 12V/12Ah battery)
Remote Units 300 h (stand-by); 220 h (20% acquisition); 150 h (max. acquisition, e.g. vibroseis)
Repeater 200 h (stand-by); 100 h (continuous line check or data transfer)
Weight
Recorder/Repeater 2 kg
Battery 12V/12Ah 4 kg
Cable Drum 250 m 9 kg
Operating Temperatures
Recorder/Repeater -30 to +80 °C