SN3500 Software Revisions

To download the latest software for the SN3500 please use the following form: 
Software Update Download

Note: SN3500 units without LED backlighting can only be updated to software version 4.03. 

A4.08 - Released 10/5/2018

  • Added installation configuration item to select ARINC 429 AHRS Status Label 270 definition
  • Improved low brightness peformance in NVIS mode for SN3500-xxxx units

A4.07 - Released 7/7/2014

  • Addressed manufacturing issue

A4.06 - Released 1/24/2014

  • For units with MOD A hardware only. (Serial numbers 5-4500 and higher.)
  • Increased tolerance for fluxgate input to prevent premature flagging at high latitudes
  • Added selection for Garmin GTN6XX/7XX to GPS-1 and GPS-2 maintenance pages. (Operation is identical to Garmin GNS430 selection).

4.05 - Released 3/2/2012

  • Adds optional LNAV Roll Steering capability. (Feature is standard on new shipments. Older units require purchase of key code to activate following software update to 4.05.)

4.04 - Released 12/5/2011

  • Changed error handling of heading when using ARINC 407 (XYZ) due to loss of inverter.
  • Improved electrical resolution of ARINC 407 bootstrap compass output. 

4.03 - Released 11/20/2010

  • Improved TACAN receiver self-test display.
  • Improved external brightness trim setting.
  • Increased resolution of heading and course datum output signals.

4.02 - Released 6/4/2010

  • Improved TACAN display for self-test and negative range rates.
  • Power-on restore of brightness setting for NVIS operations. 
  • TACAN relay output discrete for external annunciation. 
  • New reversionary attitude control input for installations with analog DME.
  • New external brightness control input.
  • Heading bug selectable to orange or white.

4.01 - Released 8/27/2009

  • ARINC 429 test mode indication.
  • Extended AC inverter range (240 - 560Hz).
  • Additional data recording items. 

4.00 - Released 5/27/2009

  • Reversionary Attitude Mode available as option when using Sandel SG102 ARHS or other ARINC 429 AHRS as primary heading source. 
  • Data recording of SG102 data for AHRS diagnostics. 
  • Slight change in font including the 'nm' character to replace the 'm' character in all distance displays.
  • Supports multi-channel DMEs.

3.06 - Released 12/11/2008

  • Corrects automatic navigation source selection syncing with Garmin receivers.

3.05 - Released 9/15/2008

  • Added annunciators for GPS WAAS selected approaches (ARINC Label 261 only).
  • GPS Integrity Annunciator position moved to the upper right portion of the display co-located with the GPS WAAS selected approach annunciation.
  • Added support for NVIS operation. 

3.04 - Released 8/4/2008

  • Added support for TACAN.

3.03 - Released 4/21/2008

  • Updated WSI satellite weather interface.

3.02 - Released 11/19/2007

  • Added GPS Integrity annunciation (ARINC Label 261 only).
  • Associated ILS Energize output with active GPS approach.
  • Added extended resolution for lateral guidance (ARINC Labels 116 and 325 only).
  • Added support for WSI AV300/350 satellite weather receivers. 
  • Added high-speed ARINC 429 GPS selection. 
  • Supports connecting USB cable while SN3500 is powered. 

3.01 - Released 9/29/2006

  • Changed heading operation during first two minutes after startup to revert to fast slave mode in installations where a KG 102 gyro input is flagged as invalid. 
  • Corrected issue with incorrect heading display during extended high-rate turns (more than 10 minutes) in installations with a KG 102 gyro input.
  • Added smoothing to compass card display when using XYZ heading input.
  • Corrected display of flight plan course line when GPS is set to OBS mode to address scenario where course line could flash.
  • Corrected situation in installations with WSI but no WX-500 input where pressing and holding the WX button would cause a system restart.
  • Disabled heading bug sync function of heading knob during map menu operations.
  • Map scratchpad memory retained during power cycle.
  • Added null calibration capability to lateral and vertical deviation outputs on Maintenance Page 10.
  • Added separate calibration settings for heading and course FCS deviation outputs on Maintenance Page 9.
  • Corrected display of equipment active status indicators on Maintenance Page 13.
  • Corrected operation of GPS Vertical Deviation selection menu when an ARINC 429 GPS is selected on Maintenance Pages 7 & 8.
  • Corrected display of valid/invalid status of analog DME valid input on Maintenance Page 5.
  • Changed bootstrap output selection to be independent of FCS selection. Bootstrap selection is now on Maintenance Page 10.
  • Added support for analog NAV receivers which do not output composite signal.
  • Changed analog to/from input when using analog localizer input to match installation manual.
  • Corrected display of vertical flag and super flag output voltages on Maintenance Page 10.

3.00 - Released 12/5/2005

  • Coupled back course localizer approach sensitivity fixed. 
  • WSI Datalink receiver precipitation and lightning support added. 
  • Map database version displayed.
  • Multiple course pointer values removed to support GNS 430/530 auto coupled enroute to approach transitions. 
  • Removed unnecessary annunciations for decluttering. 
  • Improved TFC auto-range behavior.
  • Added support of NAV2 on GPS2 relays. 
  • FCS maintenance page text revised to match pre-existing SN3308 installations. 
  • Changed default quadrant for KMT 112 installations. 

2.01 - Released 9/20/2005

  • Traffic display capability feature added.
  • King serial DME support added.
  • Analog DME support added.
  • KLN 94 OBS mode support added.
  • Menu button operation improvement.
  • Color display & color pallet improvement.
  • VDI flagging improvement. 
  • Map range expanded to 1,000 miles. 

1.02 - Released 6/29/2005

  • Commercial release.

1.00 - Released 5/12/2005

  • Initial release.