Upgrade Your Tycho II Precision TimeBase

Meridian II TimeBase

Free Software Upgrades

We provide free software upgrades for our products.  The software available on this page is for the Meridian II. Here are the latest binary image files:

Linux Subsystem (Root File System)
Download 6010-0067-000 v3.01
WARNING: Some browsers will automatically unzip this file.  After you have downloaded, make sure the size is < 40M.
MD5 Checksum: 50f6fde966fbbca7e483474d7fb15a84
Click here to see list of changes.
Linux Subsystem (Kernel)
Download 6010-0064-000 v2.01
MD5 Checksum: f2624e59fec5a9da0f7af4dadb321cf3
Click here to see list of changes.
GPS Subsystem
Download 6010-0076-000 v3.00
Click here to see list of changes.
GPS Receiver
Download 6010-0081-000 v1.20
Click here to see list of changes.

 

Upgrade Instructions

For complete instructions, please refer to "Appendix B - Upgrading the Firmware" of your User Manual.  If you want to download the latest manual click here for the Tycho II User Manual.

If you have any questions or problems with the upgrade please contact customer support by email (support@endruntechnologies.com) or phone (1-877-749-3878 or 1-707-573-8633).

 

History of Software Changes

Linux Subsystem (Root File System) — Software Part Number 6010-0067-000

Version Date Changes
3.01 11/2018 Changes include:
1.  Added Hybrid Mode to the Precision Time Protocol (PTP) option.
2.  Fixed rare SNMP bug when querying the fault status bytes.
RECOMMENDATION: No need to upgrade unless you use SNMP or want the PTP Hybrid Mode. If you choose to upgrade then you must also upgrade the GPS Subsystem.
2.40 9/2017 Changes include:
1.  Calculation of NTP refclock peer dispersion reverted to that of NTP versions 4.2.2 and earlier.  This improves compatibility in installations operating mixtures of old and new Stratum 1 NTP servers.
2.  Added missing shared library required by ntp-keygen binary.
3.  Added RINEX observations logging for Precise Point Positioning (PPP) and HP5071A cesium control.
RECOMMENDATION: No need to upgrade unless you use ntp-keygen.
2.20 6/2017 Changes include
1.  Added support for new products RTM3205 and 2U version of Meridian II.
2.  Very minor bug fixes for users who have customized their /etc/profile or /etc/rc.d/rc.M file. New environment variables were not being set after firmware upgrades.
RECOMMENDATION: No need to upgrade.
2.12 12/2016 Changes include:
1.  Updated NTP to version 4.2.8p9 due to recently-discovered vulnerabilities.  For more information see Network Security Bulletin NSB161205.  For additional security recommendations, see Best Practices to Secure Your Time Server.
2.  Added two new commands for restoring operation after using a GPS simulator.  You should execute "resetlastgpswn" and "resetleaphistory" to restore these settings to factory defaults after you've used a GPS simulator.  If you require this functionality then you must also upgrade your GPS Subsystem to version 2.03 (or later) and your GPS receiver to version 1.11 (or later).
RECOMMENDATION: Please upgrade the Linux Subsystem (RFS), the GPS Subsystem and the GPS Receiver.
2.11 10/2016 Changes include:
1.  Updated NTP to version 4.2.8p8.
2.  Added new command ("installed_sw_opts") to show a list of installed software options (if any).
3.  Inhibited excessive SNMP logging to system logs.
4.  PTP Option: Changed TFOM level used to indicate GPS locked status from 3 to 4. This prevents the PTP Time Source from bouncing between GPS and OSC.
5.  PTP Option: Reduced PTP logging when Port State is passive.
6.  Added support for the Real-Time Ionospheric Corrections (RTIC) Option.
RECOMMENDATION: Please upgrade.
2.01 05/2016 Changes include:
1.  Added more logging information for PTP option.
2.  Enabled operation of Linux binaries: tcpdump, ping6, udevd, udevadm, dig and lsusb.
3.  Commands added to provide detailed GPS information: dumpalmanac, dumpephemeris, gpsionoinfo.
4.  Command added: clearalmanac.
5.  Command added to provide serial number of GPS receiver: rcvrserialnumber.
RECOMMENDATION: Please upgrade the Linux Subsystem (RFS), the GPS Subsystem and the GPS Receiver.
2.00 8/2015 Initial release.

 

Linux Subsystem (Kernel) — Software Part Number 6010-0064-000

Version Date Changes
2.01 11/2016 Applied patch to neutralize the "COW" vulnerability.  This vulnerability allowed privilege escalation of existing users having shell access to the system.
RECOMMENDATION: Please upgrade.
2.00 9/2016 Added Advanced Routing and Net Filtering capabilities to support advanced handling of the two network interfaces.  These features may be accessed using the iproute2 utilities provided by the ip binary.
RECOMMENDATION: No need to upgrade unless you want to use this advanced feature.
1.01 8/2015 Initial release.

 

GPS Subsystem — Software Part Number 6010-0076-000

Version Date Changes
3.00 9/2018 Changes not pertinent to the Tycho II.
RECOMMENDATION: If you upgrade the Linux Root File System then you must upgrade the GPS Subsystem.
2.40 12/2017 Added RINEX observations logging for Precise Point Positioning (PPP) and HP5071A cesium control.
RECOMMENDATION: No need to upgrade.
2.20 4/2017 Improved internal consistency checking on GPS information to reduce occurrence of nuisance alarms.
RECOMMENDATION: Please upgrade.
2.03 12/2016 Changes include:
1.  Fixed bug related to receiving GPS UTC info under certain conditions.
2.  Improved oscillator control while resynchronizing after a signal outage.
3.  Added two new commands for restoring operation after using a GPS simulator.
RECOMMENDATION: Please upgrade the Linux Subsystem (RFS), the GPS Subsystem and the GPS Receiver.
2.02 9/2016 Changes include:
1.  Reduced false alarms that may occur when GPS antenna is subject to interference or is located in a weak signal area.
2.  Bug corrected that prevents leap second from occurring if unit is not receiving a GPS signal at UTC midnight on the day of the leap.
3.  Added support for Real-Time Ionospheric Corrections (RTIC) Option.
RECOMMENDATION: Please upgrade.
2.01 5/2016 Increased integrity checking of leap second, UTC and ionosphere model data received from GPS almanac transmissions.  This will help protect Tycho II from problems that may occur due to GPS system errors or spoofing.  If data is received that fails the integrity checks it is saved in a system log file.
RECOMMENDATION: Please upgrade the Linux Subsystem (RFS), the GPS Subsystem and the GPS Receiver.
2.00 8/2015 Initial release.

 

GPS Receiver — Software Part Number 6010-0081-000

Version Date Changes
1.20 6/2017

Improved GPS signal interference rejection.

RECOMMENDATION: Please upgrade.

1.11 12/2016 Changes include:
1.  Subtle improvement in handling of GPS Iono model updates.
2.  Improved behavior in installations with poor satellite visibility.
3.  Added two new commands for restoring operation after using a GPS simulator.
RECOMMENDATION: Please upgrade the Linux Subsystem (RFS), the GPS Subsystem and the GPS Receiver.
1.10 9/2016 Added support for Real-Time Ionospheric Corrections (RTIC) Option.
RECOMMENDATION: Please upgrade.
1.02 5/2016 Changes include:
1.  Fixed inability to come out of position unknown mode after unit has been moved a very long distance.
2.  Increased integrity checking of leap second, UTC and ionosphere model data received from GPS almanac transmissions.  This will help protect Tycho II from problems that may occur due to GPS system errors or spoofing.  If data is received that fails the integrity checks it is saved in a system log file.
RECOMMENDATION: Please upgrade the Linux Subsystem (RFS), the GPS Subsystem and the GPS Receiver.
1.01 8/2015 Initial release.