Frequency Standards: Upgrade Meridian Software

Upgrade Your Meridian Precision GPS TimeBase
Free software upgrades

We provide upgrades and enhancements to our products at this site for no charge. The software available on this page is for the Meridian product line.

NOTE: You do not need to upgrade software everytime we release a new version. This is because the software installed in the Meridian is a shared code base used by other products - the Unison, the Tempus LX, and the Tycho. Sometimes we make changes to the software that are relevant for one product but not for others. Or, we may add features and options that would not be pertinent to your particular product. Read the history of changes below to see if upgrading software makes sense for you.

The latest binary image files:

Linux Subsystem
What is the part number of your current software? You need to know this number in order to get the correct binary image for upgrading the Linux Subsystem of your Meridian.

To get the software part number type command: "gsysversion". You will see the software part number displayed like this:

Meridian GPS 6010-004x-000

Click here if x=2 (software part number is 6010-0042-000).

Click here if x=4 (software part number is 6010-0044-000).

Receiver Subsystem
Current revision level is v5.04.
You may not need to upgrade. Check the history of software changes first.
If you do decide to upgrade the Receiver Subsystem then be sure to also upgrade the Linux Subsystem.
Click here to download Receiver Subsystem 6010-0020-000 v5.04.

Upgrade Instructions
To start please refer to "Appendix B - Upgrading the Firmware" of your User Manual. If you want to download the manual click here to go to the User Manual download page.

The first image file above is for the Linux Subsystem. This is a GZIP file (.gz) so use as is - do not decompress it before downloading into the Linux Subsystem. To download follow the instructions in "Appendix B - Performing the Linux Upgrade".

The second image file above is not zipped. It is the binary file for the Receiver Subsystem. To download follow the instructions in Appendix B "Performing the GPS Upgrade".

If you have any problems with the upgrade please contact customer support by email or phone: 1-877-749-3878.

History of Software Changes for Linux Subsystem
(Software Part Number 6010-0042-000 and 6010-0044-000)

Version	Changes
5.11	Fixed a bug related to the gsysuser login. If you are having trouble logging in to your unit then upgrading your software will not correct the problem. Please see this Field Service Bulletin. RECOMMENDATION: No need to upgrade. NOTE: A major change occurred at version 2.60. If you are upgrading and the current version in your unit is prior to that, then please read the information on version 2.60.
5.10	New option added to the product line: Precision Time Protocol (PTP/IEEE-1588). RECOMMENDATION: No need to upgrade.
5.00	Added software support for new features: Telecom Clock Output Module and Dual Power Supplies. RECOMMENDATION: No need to upgrade.
4.00	1. Modified the start-up sequence to eliminate the need for operator intervention in order to show the time on the display. Now the unit will go to the time display 30 seconds after the startup sequence has finished. 2. Added additional format selections to the Serial Time Output Option. 3. Changed TFOM value to be in the range of 9-3 (was 9-4). A TFOM of 3 indicates synchronization accuracy to within 100 nanoseconds. 4. Added CRC checking on the time information going from the Receiver Subsystem to the Linux Subsystem. This will further bulletproof the timekeeping ability of the product and prevent any possible time jumps in the rare case (seen only once) of a hardware glitch on the circuit board. RECOMMENDATION: Upgrade if you would like the features listed in #2 or #4.
3.02	1. To enhance SSH security, the default was changed from accepting versions 1 and 2 protocol connections to only accepting version 2 protocol connection. Version 1 is considered insecure. 2. Fixed a bug wherein the NTP Server continued to serve time for too long after loss-of-lock to GPS synchronization signal. RECOMMENDATION: Please upgrade.
3.01	1. Fixed a bug related to the AM/PM local time display. 2. Added 0.1 meter resolution capability to the console "setgpsrefpos" script. RECOMMENDATION: Upgrade if you use local time 12-hour mode for your display.
3.00	1. Added ability to change TFOM level at which alarm occurs. 2. Added ability to set optional Serial Time Output format via front-panel keypad/display. 3. Added ability to mask off certain alarms - the Antenna Fault and the Signal Loss Fault. 4. Added more selections for the optional Programmable TTL Output. 5. Added alternative Time Display that shows the time with Day-Of-Year as: DOY:HH:MM:SS. 6. Fixed a bug related to unprivileged user in cntpstat/gntpstat reporting. RECOMMENDATION: Upgrade if you care about one of the items above.
2.63	Added capability to discipline new oscillator type. Irrelevant for previously shipped products. RECOMMENDATION: No need to upgrade.
2.62	1. Fixed a bug related to changing DST information via the front-panel display. 2. Fixed a bug when entering positive time zone offsets via console port command "timemodeconfig". RECOMMENDATION: Upgrade if you are in a positive time zone (east of Greenwich Mean Time) or you use the Daylight Savings Time (DST) feature.
2.61	Changes not relevant to the Meridian. RECOMMENDATION: No need to upgrade.
2.60	Major upgrade with updated versions of all applications, utilities and shared libraries typically installed in an embedded Linux-based system. Please click here for IMPORTANT information. RECOMMENDATION: Please upgrade. NOTE: This software release is IPv6-capable. IPv6 is in the experimental stage but some of our customers want it now. In order to enable IPv6 operation you must perform a second upgrade operation to replace your IPV4-only kernel. If you want IPv6 operation then: 1. Click here for IMPORTANT information, AND... 2. Click here to download the IPv6-capable Linux kernel.
2.05	Added capability to discipline new oscillator type. Irrelevant for current products. RECOMMENDATION: No need to upgrade.
2.04	Added capability to discipline new oscillator type. Irrelevant for current products. RECOMMENDATION: No need to upgrade.
2.03	Improved the receiver status and oscillator control status displays. RECOMMENDATION: Upgrade if you want the improved displays.
2.02	Fixed minor bug that displayed the wrong filesystem partition. RECOMMENDATION: No need to upgrade.
2.01	Changes include: 1. Modified status command (gpsstat) to show 20-bit DAC value instead of 16-bits. 2. Added variables to SNMP MIB. RECOMMENDATION: Upgrade if you care about one of the items above.
2.00	First release for Meridian. This release was an integration of Time Server and Time & Frequency products into the same firmware image with automatic boot time configuration of the model and receiver type. RECOMMENDATION: No need to upgrade.

History of Software Changes for Receiver Subsystem
(Software Part Number 6010-0020-000)

Version	Changes
5.04	1. Corrected identification of dual power supplies. 2. Corrected bug that wore out FLASH memory chips on GPS units operating for long periods of time without an antenna. See this Field Service Bulletin. RECOMMENDATION: GPS users please upgrade.
5.03	Corrected bug introduced in version 5.00 (GPS only). RECOMMENDATION: GPS users please upgrade.
5.02	Improved IRIG-B time code generation. RECOMMENDATION: No need to upgrade unless the time code reader you are using is having trouble reading the IRIG. (Rare problem - seen only once.)
5.01	Continued software support for new feature: Telecom Clock Output Module. RECOMMENDATION: No need to upgrade.
5.00	1. Added software support for new features: Telecom Clock Output Module and Dual Power Supplies. 2. Corrected rare bug in GPS leap second processing. RECOMMENDATION: GPS users upgrade before next leap second occurrence.
4.00	1. Added additional format selections to the Serial Time Output Option. 2. Changed TFOM value for GPS model to be in the range of 9-3 (was 9-4). Note: TFOM is usually irrelevant for time server customers. 3. Corrected bug in the IRIGB-120/IEEE1344 output. 4. Added CRC checking on the time information going from the Receiver Subsystem to the Linux Subsystem. This will further bulletproof the timekeeping ability of the product and prevent any possible time jumps in the rare case (seen only once) of a hardware glitch on the circuit board. RECOMMENDATION: Upgrade if you are using the optional IRIGB-120/IEEE1344 output.
3.03	Added NMEA0183 format to the Serial Time Output option. RECOMMENDATION: No need to upgrade.
3.02	Change not relevant to the Meridian. RECOMMENDATION: No need to upgrade.
3.01	Added software to work with new version of hardware circuit board. Irrelevant for previously shipped products. RECOMMENDATION: No need to upgrade.
3.00	No change. Version bumped to maintain synchronization with Linux Subsystem version. RECOMMENDATION: No need to upgrade.
2.13	Added capability to discipline new oscillator type. Irrelevant for previously shipped products. RECOMMENDATION: No need to upgrade.
2.12	Test routine added for factory manufacturing. Irrelevant for customer. RECOMMENDATION: No need to upgrade.
2.11	Added new string format selections for optional Serial Time Output. RECOMMENDATION: No need to upgrade.
2.10	Test routine added for factory manufacturing. Irrelevant for customer. RECOMMENDATION: No need to upgrade.
2.09	Changed time code format selection list. RECOMMENDATION: No need to upgrade.
2.08	Fixed a minor bug in the time display when the timemode was set for GPS. RECOMMENDATION: Upgrade if you are using GPS timemode.
2.07	Changes include: 1. Modified GPS calibration delay based on data from NIST testing. This causes an 86 nanosecond advance in time relative to previous software versions. 2. Corrected extremely rare bug for GPS units that occurred only in very high interference environments. RECOMMENDATION: GPS users please upgrade.
2.06	Added capability to discipline new oscillator type. Irrelevant for current products. RECOMMENDATION: No need to upgrade.
2.05	Added capability to discipline new oscillator type. Irrelevant for current products. RECOMMENDATION: No need to upgrade.
2.04	Modified oscillator regression behavior. RECOMMENDATION: No need to upgrade.
2.03	Added capability to discipline new oscillator type. Irrelevant for current products. RECOMMENDATION: No need to upgrade.
2.02	First release for Meridian. RECOMMENDATION: No need to upgrade.