Frequently Asked Questions
How to evaluate the noise performance of a unit?
How to calculate the resolution of a unit?
Resolution is expressed in bits in 2 variants in units of [Bit]:
Noise free / Peak-Peak (PP):
Effective / Root Mean Square (RMS):
Fullscale and Noise could be expressed in counts, volts, g, mm/s, etc.
For example for a ±2 g sensor the Fullscale is 2 g.
How to calculate the dynamic range of a unit?
Dynamic range is expressed in bits in 2 variants in units of [dB]:
Noise free / Peak-Peak (PP):
< br /> Effective / Root Mean Square (RMS):
Fullscale and Noise could be expressed in counts, volts, g, mm/s, etc.
For example for a ±2 g sensor the Fullscale is 2 g.
How to convert Bit (resolution) to dB (dynamic range)?
ref: Werner, M.,"Nachrichtentechnik / eine Einführung für alle Studiengänge", Vieweg + Teubner, 2009
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Find more answers related to your GSR, GCR and AS series instruments here
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How to send an instrument or sensor back to us (RMA)
What is a freefield strong motion station
A free-field strong-motion station for a subject area is intended to measure ground motions that can represent the reference motion not contaminated by any man-made / natural random noise or by structural response or soil-structure interaction.
Here are general guidelines for the selection and or establishment of such a station:
- A foundation that is well coupled with the ground and well protected from environmental effects
- Far away from roads or from any source of transient and random vibration
- Far away from any structure at a distance 3 to 4 times of any dimension of such structure
- Preferred to be on the same type of soil as the overall area under consideration
- Reasonable easy access at all times
How can I improve the cyber security of GeoSIG instruments?
Product Safety Announcement: GMS series of recorders with an internal battery
GPS Systems Announcement: GPS Week Number Rollover (WNRO) issue
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When we say "Sampling rate up to 2000sps - later optionally 5000sps", the 5000sps means it will be optionally available by choosing nair module.
"Perfect channel alignment due to shared clock between ADC boards. This is an important improvement, in particular for higher sampling rates." How many ADC boards are there?
Up to 12 ADC board, each with 3 channels (12x3=36 totally)
What does high performance CPU mean specifically?
4x Arm Cortex™-A9 Quad-Core, 800Mhz, 2GB RAM DDR3
what is an embedded smart battery charger?
It monitors the battery charging level to preserve the battery lifetime, over-voltage and under-voltage protection.
What are the parameters for LCD display on the front of the rack panel?
It's a summary of the SOH, time, time source, last event, free memory, errors, input voltage and battery, PGA in case of an event, relay status...
"SSD storage drive, which ensures much more reliable data storage and optionally the mirroring function of the data to SDcard-SSD and hot swap" What's the mirroring function of the data mean?
Shortly, it means that files can be saved at the same time on both SSD and SD-card managed by quotas.
Is it possible to have a different sps for event and data stream? (e.g. 2kHz for event & 100Hz for data stream)
Yes, this is possible
How many receiving IP address at most?
4 servers can be set, 4 data-streams with seedlink, 1 stream per port with GSBU but any amount of ports can be configured.
