There are two guides on the Leica Advantage site. One for CDMA modems, and one for cell phones. Click the link below.

GPS 1200 Quick Guides

Cause:  When points are created on the GPS1200, the System "tags" the point with a time stamp.  If the points are uploaded from an ASCII file, all points are given an identical time stamp.  The receiver tries to sort and display the points based on the current filter. The default filter for the point database is sorted by "Backward Time" which in this case is not valid. When trying to access a specific point (i.e. via "Stakeout"), the System is unable to easily & quickly find the point in it's database (since all points have the same time stamp) and this causes the erratic performance.  

Solution:  After transferring a large point file to a job in GPS 1200, do the following:

(from Main Menu)

1.  Press <3> "Management"

2.  Press <2> "Data"  (...your job points should now be displayed)

3.  Press the "SHIFT" key, then press <F5> "FILT"

4.  (From the "Points" tab) Change the "Sort" line from "Backward Time" to

(either) "Ascend Point ID" or "Descend Point ID"

5.  Press <F1> "Cont" twice to return to Main Menu display

Proceed with your Survey or Stakeout job normally.  Things should behave much happier now (...a happy receiver is a GOOD receiver).

Thanks to Greg Hazelquist of SERVCO and Tony Wilson of Leica for this information.