ULN-2550 User Manual - Jackson Labs Technologies, Inc.

ULN-2550 User Manual
1Introduction
1.1 Overview
The ULN-2550 GPSDO includes an extremely high-performance GPS receiver that can acquire and
track up to 50 GPS signals down to a state of the art –160dBm, a 32bit processor that runs a Real
Time OS, one 100MHz CMOS output, one 10MHz CMOS output, four 25MHz LVDS outputs, 1PPS
UTC synchronized LVDS and CMOS outputs, RS-232 5V-level control interface, and precision
voltage references and DACs.
1.2 General Safety Precautions
The following general safety precautions must be observed during all phases of operation of this
instrument. Failure to comply with these precautions or with specific warnings elsewhere in this
manual violates safety standards of design manufacture, and intended use of the instrument. Jackson
Labs Technologies, Inc. assumes no liability for the customer’s failure to comply with these
requirements.
1.2.1 Grounding
To avoid damaging the sensitive electronic components in the ULN-2550 GSPDO always make sure
to discharge any built-up electrostatic charge to a good ground source, such as power supply ground.
This should be done before handling the circuit board or anything connected to it, i.e. the GPS
antenna.
1.2.2 Power Connections
Make sure to connect the DC power to the device following the polarity indicated in Section 2.1 . Do
not reverse the power pins as this will cause serious damage to the circuit board.
1.2.3 Environmental Conditions
This instrument is intended for indoor use. It is designed to operate at a maximum relative
non-condensing humidity of 95% and at altitudes of up to 4000 meters. Refer to the specifications
tables for the ac mains voltage requirements and ambient operating temperature range.
© 2010 Jackson Labs Technologies, Inc. 1