Trimble Outdoors AgGPS 332 - Manual (Page 106)

C NMEA-0183 Messages
9 6 AgGPS 332 GPS Receiver User Guide
C.15
PTNLEV Proprietary (Event Marker)
The PTNLEV message is a Trimble proprietary message for
time-tagging and marking when an event input occurs. If enabled, this
event message is output whenever an event is detected.
The PTNLEV message structure is:
$PTNLEV,184804.00,0*XX
Table C.15 describes these fields.
Table C.15 PTNLEV message fields
Field Description
1 Time: UTC time of the position fix in hhmmss.ss format
2 Event number, starting with event 0