Juniper Systems Allegro DOS Manual - Manual (Page 153)

Allegro DOS Owner’s Manual 153
GPS Expansion Pod
The GPS expansion pod integrates the Trimble Lassen LP GPS
receiver with the Allegro. A compact 3.3 V active micropatch antenna
is mounted to the top of the Allegro.
The Lassen LP module is a high-performance, low power, micro
GPS receiver that supports both TSIP and NMEA protocols
with autonomous accuracy of 5 –10 meters, or 2 – 5 meters after
differential correction. The GPS expansion pod is used in conjunction
with the following programs:
LandMark CE ™ mapping and navigation program
DataPlus ™ Professional or EASYDC ™ generated applications for
data collection
Attaching the Antenna
Before you can use the GPS expansion pod, you must attach the
antenna. To do this, complete the following steps:
Note: We have more than one GPS expansion pod model. The one attached
to your Allegro may look slightly different than the model used in the
pictures shown in this document. These instructions apply to all models.
Remove the antenna assembly from the bag and loosen the two
thumbscrews located at the bottom of the mount.
Remove the stylus from the Allegro.
Insert the stylus that is attached to the antenna mount in place of
the stylus you removed. As you place the stylus in its slot on the
Allegro, slide the metal cover up into the stylus slot so that the
stylus fi ts into place.
Use two fi ngers, one on each prong of the stylus, and press it
securely into place.
Make sure the rubber stylus holders are not pressed inward or
they may pop the antenna out of the stylus holder. Removing the
rubber covers to the Com ports can help make this step easier.
Place the two knobs on the end of the antenna clamp into the
screw holes located above the COM ports of the Allegro.
Tighten the thumbscrews on the antenna so that the antenna is
securely fastened into place. You want the thumbscrews to be
snug, but do not over tighten them.
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