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
JBAT
removed
set data retention mode
battery not connected
JANT
1 2 3
1 2 3
1 2 3
removed
set 1-2
set 2-3
passive Antenna
active Antenna +5V
active Antenna +3.3V
WARNING: unmatched JANT settings may destroy antenna
check settin
g
an
y
time before connectin
g
GPS antenna
Jumper Configuration & Factory Defaults
Before inserting the CG2-SHANTY into your CPCI enclosure, please control the settings of some
jumper fields on the board. Typically, there are two jumpers that need adjustment.
C Set the jumper JBAT. This enables the Lithium cell, which provides for saving satellite
tracking information in a buffered SRAM, and supplies the RTC, which is operating as
clock source while the system is powered down or there is no receiver signal available on
the antenna input.
C Check the jumper JANT according to the antenna in use. If your antenna is equipped
with a cable more then 2m length, probably it has a built-in amplifier (active antenna).
If you cannot determine the type of antenna, try the passive mode first (JANT open).
Observe the front panel LED UTC, which sends a periodic signal when the receiver gets
valid GPS data (there may be some delay time). If this procedure is not successful, set the
JANT jumper to the +5V active antenna mode. Note: GPS antennas need free sky above
them (mounting outside the building required).
JBAT provides for non-volatile GPS RTC &
SRAM data (Lithium cell)
jumper removed - saves cell lifetime while
board storage (delivery status)
jumper set - data retention mode
factory default is off - check this setting if
TTFF is slow
you have to set this jumper on a new board
- EKF opens this jumper for storing and
shipping
Check your antenna type in use! If in doubt,
remove jumper (passive antenna).
If your active antenna needs a +5V power
supply set 1-2
If your active antenna needs a +3.3V power
supply set 2-3