DAQ Systems, of Bozeman, Montana, is now offering NetDAS (right-hand photo), an IP data logger for seismic applications, with the Spectrum Instruments (www.spectruminstruments.com) Intelligent Reference/TM-4 GPS module (left-hand photo). With the TM-4 option, NetDAS offers improved timing, GPS-synchronized true integer sample rates, stable hold-over accuracy during periods of GPS signal loss, optional IRIG time code and NTP output, and microsecond-accuracy event time tag and programmable output pulses. The TM-4 option adds $1,595 to the $3,995 NetDAS base price.12

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