Updates & Downloads

GPS 18x 5Hz software version 4.40

as of September 16, 2019

Use Garmin Express to install this file.

(278 KB)

View system requirements

Notes:

WARNING: If this software is uploaded to a device other than that for which it is designed, you will not be able to operate that device.
If attempts to upload software fail, you may need to return the device to Garmin® for service.

Change History

Changes made from version 4.30 to 4.40:

Fixed corner case GPS week number rollover for devices using older hardware.

Changes made from version 4.20 to 4.30:

Fixed satellite tracking bug affecting GPS sensors used before April 6, 2019.

Changes made from version 4.00 to 4.20:

Fixed GPS week number rollover.
Improved PPS (pulse per second) reliability.

Changes made from version 3.40 to 4.00:

Improved time keeping.

Changes made from version 3.30 to 3.40:

Better handling for leap second data storage especially over long periods of non-use.

Changes made from version 3.20 to 3.30:

Fix the timing of the output PGRMT Sentence.
Fix to retain position averaging state between power cycles.
Update the magnetic variation table.

Changes made from version 3.10 to 3.20:

Modified proprietary binary output data format to fix incorrect date/time calculation on some Garmin marine products.
Fixed problem with almanac data not outputting.
Reversed sign of vertical velocity to be in ENU coordinates.
Add PGRMID sentence to allow user programmable device ID.
Added support to enable/disable internal position averaging.
Improved NMEA output timing stability.
Added support to enable/disable velocity threshold filtering.
Modified the PGRMID sentence format for maintaining consistency with the other NMEA sentences.

Changes made from version 3.00 to 3.10:

Improved robustness of internal error handling.

Changes made from version 2.90 to 3.00:

Fixed NMEA mode echo when the reset command is sent via PGRMI.

Changes made from version 2.80 to 2.90:

Improved binary phase output and mode switching reliability.

Changes made from version 2.70 to 2.80:

Fixed problem of unit not working above 60,000 feet.
Fixed problem of sometimes only outputting at 1Hz.
Allow PPS to coast when fix is lost.

Changes made from version 2.60 to 2.70:

GPS velocity performance improvements.
Fixed time field of PGRMI echo sentence to be UTC time.

Changes made from version 2.50 to 2.60:

Fixed field 7 of PGRMI input to properly reset unit.

Changes made from version 2.40 to 2.50:

This version will clear all user settings.
Fixed problem with SBAS tracking.
Changed default DGPS mode to 'Automatic'.
Fixed formatting of GPVTG sentence.

System requirements

IBM-compatible PC running Windows 2000 or later operating system and an available Com 1, 2, 3, or 4 port.
PC Interface Cable for suitable for your OEM unit. The user will need to fabricate one according to the data provided in the Technical Specifications.