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revision history
True North Technologies Revolution electronic compass, compass sensor, strapdown compass, gyro stabilized compass
The latest version of each item is available in the Downloads section.  The following lists explain the revision history for the software and documentation.

TNT Revolution Software

Rev Release Date Reason

4.22

06-25-2009

Fix inverted orientation for plotting points on 2D external magnetic calibration

Fix minor issues with options in Onboard Magnetic Calibration interface

Fix problem where changes to VRef on Magnetic tab of Settings dialog where not used during current session of the application

Fix minor issues with application Help

4.21

03-14-2008

Fix problem with baud rate list on Settings page

4.20

01-24-2008

Add support for improved external magnetic calibration

4.10

07-18-2007

Correct limits for Number of Readings entry in Onboard magnetic calibration dialog

Improve handling of HTM sentences in Attitude Display dialog

4.09

06-14-2007

Add support for Onboard magnetic calibration (GS only)

Fix problem with communicating at 2400 baud

Fix problem where error creating record file caused update rates to be turned off

Modify Attitude Display dialog to query for HTM sentences rather than change update rate

Add Apply button to BIN Sentences dialog

Don't show Enable Rate Limiting on Tilt tab of Settings dialog when GyrosInstalled = False

4.08

01-18-2007

Improve application help

Improve logic for connecting to compass using USB cable

Fix problem where sentence rate wasn't displayed properly if error creating file for recorded data

Correct issues with international settings

Add restore settings capability

Add support for low power and extended tilt units

4.06

10-05-2006

Add support for USB cable

4.05

08-28-2006

Modify Serial Tab of Settings dialog to show gyro settings for gyro compasses even if gyros not installed

4.04

05-04-2006

Compile with Compass.OCX Rev 5.17

4.03

04-24-2006

Compile with Compass.OCX Rev 5.16

4.02

04-13-2006

Add support for Revolution GS

3.01a

12-22-2004

No change to PC Software.  Update installation with TNT Revolution Palm Software Rev 1.4.4

3.01

10-28-2004

Add Reset Magnetic Calibration function to menu

Add serial number of compass to Settings log entries

Read Settings log file on program startup and display in Settings log form (previously showed entries from current session only)

2.14

09-10-2004

Improve numeric formatting for international settings

Enhance Magnetic Calibration

Fix problem with repeated soft-iron calibrations

Update Help to reflect modifications to Options dialog and Magnetic Settings tab

After installation, remind user to perform HotSync to capture current state of PDA.  If case of battery failure, user can then HotSync from the PC to restore the PDA's original settings.

2.13

05-03-2004

Correct logic to prevent application from terminating unexpectedly when collect more than 10 samples in Multi-Step (Manual) mode of Magnetic Calibration

Improve error message if port in use when start application

2.12

03-10-2004

Add 3D Continuous calibration mode

Correct logic for drawing Vertical Reference graph after done collecting data

Improve context-sensitive help

2.11

09-24-2003

Remove 1200 baud (no longer used)

2.10

09-03-2003

Improve AutoZero logic

Improve limit checking for applying values in Settings dialog

Add reference in application and ActiveX control help files that NMEA Update Rates are in sentences per minute

2.09

08-11-2003

Add support for Revolution 2X

2.08

06-18-2003

Correct logic for calculating Vertical Reference

Do not allow View Attitude Display during Vertical Reference or Magnetic Calibration

On Attitude Display, show whether or not compass is in Sample Mode

Add logic to prevent overflow if extremely out-of-spec data when drawing X's in Sample Mode of Magnetic Calibration

Modify Settings dialog to have one Apply button for all tabs

2.07

03-28-2003

Adjust formatting of various entries on View NMEA Sentences screen when toggle between decimal and other three Angles settings

Do not allow Z Offset to be modified on Magnetic Settings Tab

2.06

03-04-2003

Add separate help file for Compass.OCX

2.05

02-26-2003

Do not show negative deviation/variation from HDG sentence

Present 16-bit unsigned values > 32767 correctly

2.04

01-22-2003

Improve user interface during Vertical Reference data collection

Update Help

2.03

01-17-2003

Improve graph for Vertical Reference

Show indication of operation during AutoZero computation

2.02

01-14-2003

Improve Magnetic Calibration logic

Modify Vertical Reference logic to support slower computers

2.01

01-06-2003

Add Help

Remodel Serial Settings tab to facilitate recording of data while in Stop Mode

Add Column Headings to files created when converting PDA data to text files

Improve Vertical Reference logic

2.00

11-15-2002

Initial Release

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TNT Compass ActiveX Control and Help

Rev Release Date Reason

6.80

06-25-2009

Minor fixes

6.20

01-24-2008

Add support for improved external magnetic calibration

5.99

06-14-2007

Add Onboard magnetic calibration (GS only)

5.22

01-18-2007

Add fSendHTMonWakeUp

5.17

05-04-2006

Correct problem with capturing PDA run mode data that was introduced when gyro support was added to the ActiveX Control

5.16

04-24-2006

Correct issue with ID_fNoDataToJ2 for Revolution GS

4.00

04-06-2006

Add support for Revolution GS

3.10

09-15-2004

Fix problem with successive soft-iron calibrations

3.02

08-11-2003

Add support for Revolution 2X

2.11

03-28-2003

Adjust Vertical Reference logic to handle Zr Offset properly

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TNT Revolution User's Guide

Rev Release Date Reason

D

01-2008

Improved external magnetic calibration

C

03-2006

Remove references to PDA

B

03-2003

New J2 Wiring Instructions

A

11-2002

Initial release

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TNT Revolution GS User's Guide

Rev Release Date Reason

C

01-2008

Improved external magnetic calibration

B

06-2006

Second release

A

05-2006

Initial release

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TNT Revolution Palm Software (discontinued)

Rev Release Date Reason

1.4.4

12-22-2004

Allow pitch/roll offsets up to +/-90 (was +/-45)

1.4.3

11-08-2004

Fix problem with negative reference at end of vertical reference calibration

1.4.2

09-15-2004

Add auto update check box to compass display

Fix problem with successive soft-iron calibrations

1.4.0

03-28-2003

Adjust Vertical Reference logic to handle Zr Offset properly

1.3.9

11-14-2002

Initial release

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TNT Revolution Palm Help (discontinued)

Rev Release Date Reason

1.0.0

03-28-2003

Initial release

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