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Using the
DGPS 53
All configuration changes take effect after receipt of a valid value
except baud rate and PPS mode. Baud rate and PPS mode changes
take effect on the next power cycle.
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: GPGGA, GPGSA, GPGSV, GPRMC, and PGRMT.
$PGRMO,<1>,<2>*hh<CR><LF>
<1> Target sentence description (e.g., 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)
The following notes apply to the PGRMO input sentence:
1) If the target sentence mode is ‘2’ (disable all) or ‘3’ (enable all), the target sentence description is
not checked for validity. In this case, an empty field is allowed (e.g., $PGRMO,,3), or the mode field
may contain from 1 to 5 characters.
2) 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 being output by the DGPS 53.
3) If either the target sentence mode field or the target sentence description field is not valid, the
PGRMO sentence will have no effect.
4) $PGRMO,GPALM,1 will cause the sensor board to transmit all stored almanac information. All
other NMEA sentence transmission will be temporarily suspended.
Tune DGPS Beacon Receiver (PSLIB)
The $PSLIB sentence provides the ability to manually tune the DGPS 53.
$PSLIB,<1>,<2>*hh<CR><LF>
<1> Beacon tune frequency, 0.0, 283.5 – 325.0 kHz in 0.5 kHz steps
<2> Beacon bit rate, 0, 25, 50, 100, or 200 bps
If valid data is received, the DGPS 53 will store it in the EEPROM and echo the PSLIB command to
the beacon receiver. At power up or external reset, any stored frequency other than 0.0 causes the
DGPS 53 to automatically tune.
