Garmin GPS 19x HVS Technical Specifications - page 15
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Positioning update rate:
The selected update rate determines how many times per second the sensor will produce a new positioning estimate.
A higher update rate will cause NMEA output sentences to be transmitted more frequently. For example, if a 10Hz
update rate is selected, then a new positioning estimate is produced once every 100ms and selected high priority (
description of PGRMO for explanation on priority
) NMEA output sentences are transmitted every 100ms. When
configuring the sensor to operate at higher positioning update rates, consider the combination of communication
baud rate and NMEA output sentence selection. If the combination of configured positioning update rate and
selected set of NMEA output sentences exceeds the serial bandwidth available at the configured baud rate, then
some NMEA output messages will not be transmitted.
GPS engine dynamics mode:
When GPS engine is configured for HIGH dynamics mode, the sensor is able to produce more accurate positioning
estimates in highly dynamic motion situations (rapid changes of direction and velocity). When it is configured for
LOW dynamics mode the positioning estimates are more accurate in motion situations without highly dynamic
maneuvers.
GNSS system name, GNSS system command:
If the GNSS system name parameter is supplied, then the GNSS system command parameter is also required to
either enable or disable the use of a satellite system. The GPS19x always uses the GPS system, so use of GPS cannot
be disabled. The sensor is configured by default to use both GPS and GLONASS satellites. Use of GLONASS can
be enabled or disabled.
Talker ID:
When Talker ID is configured for AUTO, the transmitted NMEA output sentences will use the Talker ID in
accordance with NMEA0183 standard. For example, when the sensor is tracking and using GPS and GLONASS at
the same time, then most sentences will use Talker ID GN, but a few will be assigned a system-specific Talker ID
(GPGSV and GLGSV). When Talker ID is configured to use a specific Talker ID, then all transmitted sentences will
use the same specific Talker ID. This can result in non-standard output, but has been provided for flexibility.
NMEA0183 output compatible with GPS17x:
If this parameter is set to 1, then the affected GPS19x configuration profile will be set up to closely match the
operation of GPS17x sensor. This includes setting the 1 Hz positioning update rate, LOW dynamics mode, and GP
talker ID. In this mode, no information about GLONASS satellites will be output in NMEA output sentences even
though the sensor is still using GLONASS satellites internally for positioning estimates.
4.1.6 Output Sentence Enable/Disable (PGRMO)
The PGRMO sentence provides the ability to enable and disable specific output sentences and assign them high or
low transmission priority. The following sentences are enabled at the factory for the GPS 19x HVS: GPGGA,
GPGSA, GPGSV, GPRMC, GPVTG and PGRMT.
$PGRMO,<1>,<2>,<3>*hh
<1>
Target sentence description (for example, PGRMT, GPGSV, etc.)
<2>
Target sentence mode, where 0 = Disable specified sentence, 1 = enable specified sentence, 2 =
Disable all output sentences, 3 = Enable all output sentences (except GPALM), 4 = Restore factory
default output sentences
<3>
Target sentence transmission priority: 0 = low priority, 1 = high priority
The following notes apply to the PGRMO input sentence:
If the target sentence mode is 2 (Disable all), 3 (Enable all), or 4 (Restore defaults), the target sentence description is
not checked for validity. In this case, an empty field is allowed (for example, “$PGRMO,,3”), or the mode field may
contain from 1 to 5 characters.
If the target sentence mode is 0 (Disable) or 1 (Enable), the target sentence description field must be an identifier for
one of the sentences that can be output by the GPS sensor. NOTE: Though GPS19x can output sentences with
NMEA sentence Talker ID other than GP, the target sentence identifiers used for this configuration sentence still all
use the GP Talker ID.
If either the target sentence mode field or the target sentence description field is not valid, the PGRMO sentence will
have no effect.