5.04
|
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
|
1. Improved IRIG-B time code generation.
2. Added capability for CDMA model to operate in Sri Lanka.
RECOMMENDATION: No need to upgrade unless your unit has the IRIG-B option and
the time code reader you are using is having trouble reading the IRIG.
(Rare problem - seen only once.)
|
5.01
|
Changes not relevant to the Tycho.
RECOMMENDATION: No need to upgrade.
|
5.00
|
1. Most changes not relevant to the Tycho.
2. Corrected rare bug in GPS leap second processing.
RECOMMENDATION: GPS users upgrade before next leap second occurrence.
|
4.00
|
1. Added capability for CDMA model to operate in India.
2. Added additional format selections to the Serial Time Output Option.
3. Changed TFOM value for GPS model to be in the range of 9-3 (was 9-4). A TFOM of 3 indicates
synchronization accuracy to within 100 nanoseconds.
4. Corrected bug in the IRIGB-120/IEEE1344 output.
5. 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 IRIG-B120/IEEE1344 output.
|
3.03
|
Added NMEA0183 format to the Serial Time Output option.
RECOMMENDATION: No need to upgrade.
|
3.02
|
Corrected Tycho configuration problem to improve the ability of the CDMA model to synchronize
to the PCS frequency band.
RECOMMENDATION: Upgrade if you are using the PCS frequency band.
|
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: Upgrade if you have the time code output option.
|
2.08
|
Changes not relevant to the Tycho.
RECOMMENDATION: No need to upgrade.
|
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 upgrade if your Tycho is having trouble staying locked.
|
2.06
|
Added capability to discipline new oscillator type. Irrelevant for previously shipped products.
RECOMMENDATION: No need to upgrade.
|
2.05
|
Added capability to discipline new oscillator type. Irrelevant for previously shipped 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 previously shipped products.
RECOMMENDATION: No need to upgrade.
|
2.02
|
First release for Tycho.
|