© 2017 Jackson Labs Technologies, Inc.
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Mini-JLT GNSS™ User Manual
Introduction
1.1 Overview
The Mini-JLT GNSS board adds multi-GNSS support to the original Jackson Labs Mini-JLT GPSDO
with the addition of a GPS/Glonass/Galileo/BeiDou/QZSS/SBAS fixed-position timing receiver.
Jackson Labs Technologies, Inc. originally designed the Mini-JLT™ board to address a market
demand for replacing the end-of-life Trimble Navigation Limited Mini-T™ GPSDO units used in
existing customer projects. The board was designed to be form-fit-function compatible to the Trimble
units, with the exception of adding various features such as a 1PPS external input, 3-axis on-board
accelerometer, USB communication, internal antenna power supply, wide-range main power supply,
extended temperature range, lower overall height (0.8 inches vs. 0.5 inches above the PCB), and a
significantly improved thermal stability, Allan Deviation, and Phase Noise performance. The unit
also adds support for NMEA and SCPI communication commands, and removes support for TSIP
proprietary commands.
The Mini-JLT GNSS™ GPSDO uses a multi-GNSS receiver that can run in stationary (Position Hold
mode) and mobile mode to discipline an OCXO local oscillator to better than 1ppb frequency
accuracy. It supplies two 10MHz outputs. The board includes both TTL-level (RS-232 serial levels
optional) and USB serial control ports for NMEA and SCPI communication. The board operates
from a 5V supply with 4.0V to 6.0V range, and has connectors to indicate GNSS and
External-Reference lock/presence. The board includes a high-performance GNSS receiver that can
acquire and track up to 72 GNSS signals down to a state of the art –167dBm (GPS and GLONASS),
a 32bit processor that runs a Real Time OS, on5dBm legacy output, one optional 10MHz
+13dBm output, 1PPS UTC synchronized CMOS output, TTL/USB or optional RS-232 serial
control interfaces, and precision voltage references and DACs.
Содержание Mini-JLT GNSS
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