[LinuxPPS] Problem with motorola oncore

[Robert Diak]

Hello.
We tried synchronize out linux machine (UBUNTU 13.1 ) with oncore receiver.
After started ntp we have falseticker status, and after few time offset 
inrease to 999.000


      remote           refid      st t when poll reach   delay   offset 
  jitter
==============================================================================
xGPS_ONCORE(0)   .PPS.            0 l   15   16  377    0.000    0.043 
  0.019
ntpq>


What's the problem?
Thank you

Robert