Trimble Outdoors 132 - Manual (Page 123)

DSM 132/132RS Receiver User Guide 1 2 3
NMEA-0183 Messages C
C.21
PTNLDG Proprietary (Trimble DGPS Receiver
Status)
The PTNLDG message is a Trimble proprietary message for
identifying the DGPS receiver channel strength, channel SNR,
channel frequency, channel bit rate, channel number, channel tracking
status, RTCM source, and channel performance indicator for either
beacon DGPS or satellite DGPS.
The PTNLDG message structure is:
$PTNLDG,87.0,5.2,1558510.0,1200,2,4,1,25,,,*01
Table C.19 describes these fields.
Table C.19 PTNLDG message fields
Field Description
1 Channel signal strength, in 1 dBuV/m. For beacon, this is the
electromagnetic field intensity level. For satellite, this is the ADC
input voltage level.
2 Channel signal to noise (SNR) level, in dB
3 Channel frequency, in kHz
4 Channel bit rate, in bits per second (bps)
5 Channel number, 0–99
6 Channel tracking status
0: Channel idle
1: Wideband FFT search
2: Searching for signal
3: Channel has acquired signal
4: Channel has locked on signal
5: Channel disabled
7 Specified channel is used as RTCM source
0: Not used
1: Used
8 Channel tracking performance indicator. For beacon, this is the
number of errors in the last 255 words. For satellite, this is the time
since last sync, in tenths of seconds ranging from 0–255.