OmniSTAR 8200HP User Manual
Issue 1.07, 10/2008
66
PTNLDG – Proprietary (DGPS Receiver Status)
The PTNLDG message is a 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.
$PTNLDG,SS.S,s.s,fffffff.f,bbbb,ch,ts,R,PI,,,*XX
Field Number Description
1
Channel signal strength, in 1 dBµV/m. For satellite,
this is the ADC input voltage level. For beacon, this
is the electromagnetic field intensity 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
satellite, this is the time since last sync, in tenths of
seconds ranging from 0-255. For beacon, this is the
number of errors in the last 255 words.
Table 21: Description of the PTNLDG message.
NOTES:
The PTNLDG message fields are defined in free format.
Leading zeroes in a field are omitted (for example, channel bitrate 25 bps
is displayed as xxx,25,xxx instead of xxx,00025,xxx).
If a channel is disabled, the channel fields can be null fields (showing
commas only). If more than one channel is available, the message should
be repeated for each channel.
Because the contents of this NMEA message do not change significantly
during a 1-second interval, the receiver outputs this message at a
maximum rate of 1 Hz.
To Next Page
Loading...