StrataVisor NX

The StrataVisor can be deployed with multiple processors so several tasks can be handled independently. Multiple tape drives, integration of position data, plotting near trace gathers and controlling multiple printers are all handled simultaneously.

Optional processing software lets you see answers directly in the field to help you make survey decisions. An integrated brute stack is available for marine acquisition. Refraction surveys can be picked and interpreted directly on the screen. Even reflection processing software will run in the background without affecting acquisitions.

A/D Conversion: 

24 bit A/D conversion using Crystal Semiconductor 
sigma delta 2nd generation converters

Dynamic Range: 

144 dB theoretical, 125 dB (instantaneous measured) @ 2 ms, 0 dB 

Distortion: 

0.0003% @ 2 ms, 0.3 to 206 Hz 

Bandwidth: 

0.3 to 1.7 kHz (Lower frequency options available)

Common Mode Rejection: 

> -110 dB @ <= 100Hz, 48dB

Crosstalk:  

-120 @ 100 Hz, 0 dB

Noise Floor:  

0.18 uV, RFI @ 2 ms, 3 to 206 Hz

Trigger Accuracy: 

1/128 of sample interval

Maximum Input Signal: 

10 V, P-P 

Input Impedance:

 20 kOhm, 0.02 uf

Preamplifier Gains:

 0, 24, 36, and 48 dB 

Anti-alias Filters: 

82% of Nyquist, down 130 dB 

Sample Interval: 

0.25, 0.5, 1.0,2.0, 4.0, 8.0, 16.0 ms 

Record Lengths: 

16,000 samples / channel standard, 64,000 optional, independent 
of the number of channels. 

Line Testing: 

Real-time noise monitor, pulse diagnostics, continuity.

Power Consumption: 

40 W plus 0.8 W per channel 

Data Formats/Storage: 

SEG-D 8048 AND 8058. Operates with DAT, DLT, Exabyte, 3480, 
3490, 3590, 9-track, Optical and hard disk storage through SCSI interface.

Pretrigger Data: 

Up to 4096 samples. 

Stacker/Correlator: 

Full 32-bit Hardware DSP Correlator operates before or after stack. Minisosie option available to condition pilot.

Low cut: 

out, 10, 15, 25, 35, 50, 70, 100, 140, 200, 280, 400 Hz, 24 or 48 dB / Octave, Butterworth. Display filters do not affect data. 

Notch: 

50, 60, 150, 180 Hz and out, with the 50 dB Rejection Bandwidth 2% of Center Frequency

High Cut: 

OUT, 250, 500, or 1000 Hz, 24 or 48 dB/ Octave

Processor: 

Single or Dual Pentium based processors available. Consult Terraplus for current speeds.

Automatic Gain Control: 

Digital AGC with user adjustable window. Display only - does not affect raw data. 

Number of channels: 

12 to 72 channels per portable module, 12 to 132 channels per rack mount module. Modules connect to create systems up to 600 channels.

Auxiliary Channels: 

Channels can be programmed as either AUX or DATA.

Plotters: 

Drives a variety of NT compatible printers including Printex  8 and 12 inch plotters. Supports multiple printers simultaneously for shot, gather and log files. Consult Terraplus.

Triggering: 

Positive, negative, or contact closure, software adjustable threshold.

Delay: 

0 to 9999 ms in 1 ms steps 

Environmental:

 -10 to 40 degrees C. Portable will operate in a light rain.

Operating System: 

Windows NT 

Display: 

Built-in 480x640 LCD display, will drive external monitors at 600x800. 
Higher resolutions to 1024x768 available on external monitors, 
contact Terraplus to discuss options.