NISYNC_ATTR_8021AS_CLOCK_CLASS

Data
Type
Access Applies to Coercion High-Level Functions
ViInt32 RO N/A None None

Description

Returns the traceability of the time or frequency distributed by the 802.1AS clock used by the time reference specified by activeItem.

Note Note  
  • This attribute is supported only on certain targets. Refer to Target Support for Timing Attributes and Functions to determine whether or not this attribute is supported on your target.
  • You must specify the time reference using the activeItem parameter when querying this attribute.
IntegerClock Class Specification
0Reserved to enable compatibility with future versions.
1&em;5Reserved
6The clock is synchronized to a primary time reference. The distributed timescale is PTP. A clock in this class cannot be a slave to another clock in the domain.
7The clock has previously been designated as Clock Class 6, but has lost the ability to synchronize to a primary time reference. A clock in this class is in holdover mode and operates within holdover specifications. The distributed timescale is PTP. A clock in this class cannot be a slave to another clock in the domain.
8Reserved
9&em;10Reserved to enable compatibility with future versions.
11&em;12Reserved
13The clock is synchronized to an application-specific time source. The distributed timescale is ARB. A clock in this class cannot be a slave to another clock in the domain.
14The clock has previously been designated as Clock Class 13, but has lost the ability to synchronize to an application-specific time source. A clock in this class is in holdover mode and operates within holdover specifications. The distributed timescale is ARB. A clock in this class cannot be a slave to another clock in the domain.
15&em;51Reserved
52The clock is degradation alternative A for a Clock Class 7 clock that is not within holdover specification. A clock in this class cannot be a slave to another clock in the domain.
53&em;57Reserved
58The clock is degredation alternative A for a Clock Class 14 clock that is not within holdover specification. A clock in this class cannot be a slave to another clock in the domain.
59&em;67Reserved
68&em;122The clock uses an alternate PTP profile.
123&em;127Reserved
128&em;132Reserved
133&em;170The clock uses an alternate PTP profile.
171&em;186Reserved
187The clock is degredation alternative B for a Clock Class 7 clock that is not within holdover specification. A clock in this class can be a slave to another clock in the domain.
188&em;192Reserved
193The clock is degredation alternative B for a Clock Class 14 clock that is not within holdover specification. A clock of this class can be a slave to another clock in the domain.
194&em;215Reserved
216&em;232The clock uses an alternate PTP profile.
233&em;247Reserved
248The default Clock Class. This class is used if none of the other class definitions apply.
249&em;250Reserved
251Reserved for version 1 compatibility.
252&em;254Reserved
255The clock is a slave-only clock.