USB Powered NMEA

PPS signal is 3.3V CMOS with a 20ns rms accuracy. The NMEA 0183 data is available via a USB-B port on the front panel. Unit is DC powered from (-60 to +60 VDC in three ranges) or can be USB powered. The lock and self-test status is presented on the front panel with an indicator and also available on the rear panel connector via solid state relay contacts.