Specifications include, but are not limited to: Seismograph: _____________ _____________ 24 channels _____________ _____________ 24-bit analog/digital conversion resolution _____________ _____________ Sampling rate at least 0.02 to 10.0 ms _____________ _____________ Delay time up to 100 seconds _____________ _____________ Dynamic range at least 110 dB (measured) _____________ _____________ Crosstalk attenuation at least 120 dB _____________ _____________ Anti-aliasing filter _____________ _____________ Record length at least 16,000 samples _____________ _____________ Common-mode rejection at least 100 dB _____________ _____________ Pre-trigger record up to full record length _____________ _____________ Input impedance 20 k-W _____________ _____________ Input gain 24 or 36 dB (selectable) _____________ _____________ Triggering by TTL, contact closure, or geophone Geophones: ______________ _____________ 30 vertical geophones, 4.5 Hz Cables: _____________ _____________ at least 200’ long, 24 takeouts Accessories: _____________ _____________ Striker plate _____________ _____________ Trigger switch Refraction Software: _____________ _____________ 2D refraction software with lifetime license and included updates Surface Wave Software: _____________ _____________ Uses the high-resolution linear radon transform _____________ _____________ Ability to create 2D VS30 profiles _____________ _____________ Multi-mode inversion _____________ _____________ Dispersion-curve stitching _____________ _____________ Abililty to import initial 2D models _____________ _____________ Ability to import density data _____________ _____________ Variable depth and topogrpahy inversion _____________ _____________ Lifetime license with included updates
