DOC 6511_Release K
ATS-6511A/B/C Users Guide
26
Figure 6 ATS-6511A Rear Panel
The only inputs required for operation of the ATS-6511 are at least one power source and one
fiber optic cable sourced from a 4372A (3.6.3 or newer) or 4372A-T (4.0.0 or newer) installed in
an ATS-6501. Once the outputs are enabled, the unit will continue to output timing signals even
when the fiber optic cable is removed. However, the accuracy of these outputs will degrade over
time at a rate much faster than the ATS-6501 as the standard ATS-6511 has an OCXO whereas
the ATS-6501 contains a Rubidium for holdover. The ATS-6511B and C has the option for an
internal Rubidium or an external frequency reference (i.e. a Cesium) to improve holdover. For
redundancy, a second fiber optic cable can be connected to the rear panel. This fiber should be
sourced from a 4372A or 4372A-T in a different ATS-6501 chassis.
Connection to a local area network (LAN) is supported by the ATS-6511. This allows users to
access the unit remotely and also provides error monitoring capabilities. The USB ports can be
used in conjunction with a USB-to-Serial conversion cable (ATS 94000-115200) to allow users
access to the command port via a local terminal.
Figure 7
Rear Panel Fiber, LAN, and USB Connections
3.3 Software
3.3.1 Current Version
Users can obtain the current software version via the command port using the status unit:ver
command.
ATS-6511>status unit:ver
tflex-5-1-0
[OK] 2013-08-13T18:10:16Z
CAUTION: Do NOT remove the software flash while the unit is on, it may cause an
unrecoverable error on the flash rendering the system inoperative.
3.3.2 Software Updates
Upgrading the software can be accomplished via two methods.
Note: When updating to versions newer than T-Flex-3-9-X or later from Version 3-7-2 or earlier
it is recommended users obtain the software update via flash card from Symmetricom. There are
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