DOC 6511_Release K
ATS-6511A/B/C Users Guide
99
Command Example:
ATS-6511>reference external
Query:
ATS-6511>settings reference:source
external
Warning:
Prior to setting the reference to external, make sure the 10MHz signal from the
external reference is plugged in to the 10MHz IN connector on the rear of the ATS-6511B.
Reference Type (6511B/C):
Description:
Select type of frequency reference. If an external frequency reference (e.g.,
cesium, MASER) is available that is more stable than the internal reference then the timing
performance can be enhanced by utilizing the external source as the frequency reference for
the system. In order to fully realize the performance benefit the system must be told what
type of reference is being provided to it.
The system supports both monitored and unmonitored use of an external frequency
reference. If the external source is to be monitored by the system then the reference type
(given by
settings reference:external:type
) specified will be a model number such as
'hp5071a'. This enables the system to know how to communicate with the device and
allows it to query status information from the reference and monitor it for any reported
failures. In instances where monitoring is either not available or not desired then the
reference type specified will be a generic class of oscillator such as 'cesium' or 'maser'.
This enables the system to utilize the external frequency reference but does not perform any
sort of remote monitoring of the reference. Thus, failures of the external reference will not
trigger an alarm on the system unless the failure is catastrophic enough to trigger another
failure mechanism within the system.
Syntax
: reference_type (cesium | hp5071a | maser)
Command Example:
ATS-6511>reference_type hp5071a
Query:
ATS-6511>settings reference:external:type
hp5071a
See also
: reference
Remote_ntp_offset
Description:
Returns the offset in seconds between Tflex time and that of an external
NTP server.
Usage:
remote_ntp_offset <NTP server>
Summary of Contents for ATS-6511A
Page 6: ......
