The Geode™, made by Geometrics, is a multi-channel digital recording system. The system consists of 24-channel recorders linked together by an interface cable using TCP/IP, and finally linked via interface box to a common PC LAN socket. Each recorder box is feed by a 260 m geophone spread cable (GIPP ordered two 130 m cables instead) having takeouts for PE-7 clips every 10 m.
The information is stored first in the recorder box (volatile RAM!!), and then transmitted to the PC on request.
Parameter SetUp, Line Check, and Data Retrieval are controlled via PC.
GEODE Recorder Box 12 Units á 24 Channels
Battery Box 11 Units; 12 V 24 Ah
Interface Box 3 Units
Interface Cable 20 drums; 130 m
Geophone Spread Cable 20 drums; 125 m
Trigger Cable 1 drum; 100 m
Parameters
Input Signal
Channels 24
Clipping 2.8 Vpp @ low preamp (0 dB)
Digital Signal
Sample Interval 0.02, 0.03125, 0.0625, 0.125, 0.25, 0.5, 1.0, 2.0, 4.0, 8.0, and 16.0 ms
Format SEG-2, SEG-D and SEG-Y
Digitizer 24-bit Delta-Sigma; 110 dB @ 2 ms
Preamplifier 24 or 32 dB; 12 or 24 dB; 0 dB (software selection due to jumper setting)
Time Keeping
Clock 0.5 ppm
Synchronisation GPS - PPS at PC
Data Storage
RAM 65,536 Samples per Channel (volatile!)
Battery Power Usage
Recorder Box 0.2 W (stand-by)
0.65 W ( acquisition)
Weight
GEODE 4 kg
Battery Box 12 V; 24Ah 11 kg
Spread Cable Drum 11 kg
Interface Cable Drum 12 kg
Trigger Cable Drum 8 kg
Operating Temperature
Recorder/Repeater - 30 to +70 °C
Contact: Falk Brethauer
