User guide

CG2-SHANTY • CompactPCI GPS Receiver/Clock
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EKF Elektronik GmbH • Philipp-Reis-Str. 4 • 59065 HAMM • Germany
Tel. [phone] • Fax. [phone] • E-Mail [e-mail] • Internet www.ekf.com
JUTC
2
1 GND 3
10kHz
1Hz TMARK
Jumper JUTC, Time Mark
The CG2-SHANTY can be used to synchronize external events with the UTC (Universal Time
Coordinated). The board generates two output signals, named utctmark and utc10kHz, which
can be used for various purposes. Both signals are wired to the (optional) 3-pin header
connector JUTC.
(Optional)
This connector is located near the Lithium cell. If the board is not equipped with this (optional)
connector, the position can easily filled by the customer with a three pin 0.1" (2.54mm) pitch
header.
The Time Mark output utctmark provides a one pulse-per-second (1pps) signal to the user
specific application. When the receiver provides a valid navigation solution, the rising edge of
each utctmark pulse is synchronized with the UTC one second epochs to within ±300ns. This
signal is a positive logic, buffered CMOS level output pulse that transitions from a logic 'low'
condition to a logic 'high' at a 1 Hz rate. The pulse duration is typically 25.6ms. The 10kHz UTC
Synchronized Clock signal utc10kHz is a symmetric, buffered CMOS level output, synchronized
to the utctmark pulse.