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190-00885-07 GPS 17x HVS Technical Specifications Rev. A
Page 11
4.1.4 Additional Sensor Configuration Information (PGRMC1)
The PGRMC1 sentence provides additional information used to configure the GPS sensor operation. Configuration
parameters are stored in non-volatile memory and retained between power cycles. The GPS sensor will echo this
sentence upon its receipt if no errors are detected. If an error is detected, the echoed PGRMC1 sentence will contain
the current default values. Current default values can also be obtained by sending the sentence “$PGRMC1E” to the
GPS sensor.
$PGRMC1,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>*hh<CR><LF>
<1> NMEA 0183 output time 1 to 900 (sec).
<2> Binary Output Data, 1 = Off, 2 = On.
<3> No Effect (This field is not used on this model and is included only for backwards compatibility)
<4> No Effect (DGPS beacon frequency: 0.0, 283.5 to 325.0 kHz in 0.5 kHz steps)
<5> No Effect (DGPS beacon bit rate: 0, 25, 50, 100, or 200 bps)
<6> No Effect (DGPS beacon scanning, 1 = Off, 2 = On)
<7> NMEA 0183 version 2.30 mode indicator, 1 = Off, 2 = On
<8> DGPS WAAS mode, W = WAAS Enabled, N = WAAS Disabled
<9> Power Save Mode, P = Power Save mode, N = Normal
<10> No Effect (This field is not used on this model and is included only for backwards compatibility)
<11> No Effect (This field is not used on this model and is included only for backwards compatibility)
<12> No Effect (This field is not used on this model and is included only for backwards compatibility)
<13> Measurement Pulse Output Auto Off Mode, 1 = Off, 2 = On
Configuration changes take effect immediately, with the exception of Binary Output Data, which takes effect on the
next power cycle or a reset event. Send the sentence “$PGRMI,,,,,,,R” to command a reset (refer to section
4.1.2
Sensor Information (PGRMI)
. If the GPS sensor is in the Binary data mode, it is necessary to send the following
eight-byte data stream to temporarily change the data format to NMEA 0183:
10 0A 02 26 00 CE 10 03 (Hexadecimal)
Then send PGRMC1 with field 2 set to turn off the Binary Output Data format.
4.1.5 Output Sentence Enable/Disable (PGRMO)
The PGRMO sentence provides the ability to enable and disable specific output sentences. The following sentences
are enabled at the factory for the GPS 17x HVS: GPGGA, GPGSA, GPGSV, GPRMC, and PGRMT.
$PGRMO,<1>,<2>*hh<CR><LF>
<1> Target sentence description (for example, PGRMT, GPGSV, etc.)
<2> Target sentence mode, where 0 = Disable specified sentence, 1 = enable specified sentence, 2 =
Disable all output sentences, 3 = Enable all output sentences (except GPALM), 4 = Restore factory
default output sentences
The following notes apply to the PGRMO input sentence:
If the target sentence mode is “2” (Disable all), “3” (Enable all), or ‘4’ (Restore defaults), the target sentence
description is not checked for validity. In this case, an empty field is allowed (for example, “$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.
If either the target sentence mode field or the target sentence description field is not valid, the PGRMO sentence will
have no effect.
Sending the sentence “$PGRMO,GPALM,1” will cause the GPS sensor to transmit all stored almanac information.
All other NMEA 0183 sentence transmission will be suspended temporarily.
Sending the sentence “$PGRMO,,G” will cause the COM port to change to Garmin Data Transfer format for the
duration of the power cycle. The Garmin mode is required for GPS 17x HVS series product software updates.