• High resolution 24 bit recording
• User-friendly Software for Deployment and Recording of data:
  • Integrated Source Control
  • GPS mapping
  • Seismograph control
  • Standard SPS pre-plot files and SEG-Y output files
• Rugged 3 channel unit
• Scalable to 32 Gbytes of storage per unit
• Bi-color LED status
• Built-in-Test System/Oscillator for:
• System Tests
• Geophone Tests
• Accepts standard Analog Sensors:
  • Geophones
  • Hydrophones
• Supports Advanced Seismic Techniques:
  • Slip Sweep
  • Stakeless Surveys
  • Multiple Sources:
    • Dynamite
    • Vibroseis
    • Weight Drop (AWD's)
    • Air Gun
• Power Saving Modes:
  • Extended Battery Life
  • Maximum memory storage
• Real-Time Data Collection Option
• Continuous Recording in Autonomous Mode

• SAU - System Test Include:
  • Gain Accuracy
  • Pulse Test
  • Geophone Pulse Test
  • Noise Level Test
  • Dynamic Range Test
  • Geophone Resistance, Frequency and Damping Test
  • Crossfeed
  • THD
• 16 Gbytes Compact Flash Card - standard (32 Gbyte Optional)
• Large internal storage for continuous monitoring (16 Gigabyte will store over 30 days of continuous data - 3 channels at 2 msec)
• High Speed Download of internal data (100 MBits/sec)
• Noise floor less than 0.2 microvolts RMS at 2 msec sampling
• External Status Lights display status of battery voltage, GPS and SAU Recorder
• Optional VHF radio system for internal clock synchronization

3 channels per unit
Weatherproof enclosure
Rugged Aluminum Enclosure

A/D conversion:
24 bit high-speed s sigma-delta converters

Dynamic range:
144 dB (system)
Greater than 118 dB (measured at 2msec)

Bandwidth:
DC to 15 Khz
Analog filter flat response to 8000 Hz
Digital Filter Bandwidth = 0.85 of sample rate

Common Mode Rejection:
Greater than 100 dB

Crosstalk:
Better than -125 dB

Noise Floor:
0.2 microVolt RMS noise (2 msec sample rate)

Trigger Accuracy:
+/- 1 microsecond at all sample rates

Maximum Input Signal:
Standard ( x 2 gain): 3.58 Volts peak to peak

Input Impedance:
100 K Ohms

Preamplifier Gains:
x2, and x32 standard; software selectable

Anti-alias Filters:
85 % of Nyquist frequency

Digital Filters:
Low Cut - User Selectable frequency
Notch - 50 or 60 Hz standard; User Selectable
High Cut - User Selectable

Sample Interval:
0.0208, 0.0625, 0.125, 0.250, 0.500, 1.00, 2.00, 4.00, 8.00, 16.00 millisecond

Sample Frequency:
48000, 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 64.5 samples/second

Continuous Recording

Internal high sensitivity GPS unit
Internal Clock synchronized to GPS time
GPS Time and Position saved with data

Internal Storage:
Compact Flash style storage media
Standard FAT16 or FAT32 file system
(maximum file size = 32GB)

100Mbit Ethernet:
Download speed 8MB/sec; real time transfer

Power consumption:
3 channels unit
12 volts @ 0.29 amps Recording
12 volts @ 0.001 amp Sleep Mode

Built in Line Testing and Instrument Tests

Size: 9.8x7.9x5.5 in (250x200x140 mm)

Weight: 12.6 lbs (5.7 kg)