ZL30791, ZL30795, ZL30793

Product Brief

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Microsemi Confidential

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Supports a programmable number of secondary server connections

•

Hitless reference switching between multiple servers

•

Holdover when server packet connectivity is lost

•

TIE-clear option to build out, or clear, phase offsets between server references

4.7

General

The Time Synchronization Algorithm includes many advanced features to aide in the high-accuracy & high-stability

applications, including:

•

Full PLL state machine (Freerun, Holdover, Frequency Lock Acquiring, Frequency Lock Acquired, Phase

Lock Acquired), with programmable thresholds for state transitions

•

Programmable, non-linear packet selection with PDV suppression

•

Programmable bandwidth configurability from sub-mHz to 100s of mHz.

•

Programmable packet rates from 1 packet/second to over 128 packets/second

•

Programmable phase slope limiting, down to 1 ns/s

•

Programmable frequency change limiting, down to 1 ppb/s

•

Warm-start to initialize or seed the Time Synchronization Algorithm from a stored or last-known-good

frequency offset to improve convergence

•

Programmable thresholds for management of phase errors: when to adjust with frequency offsets and

when to adjust with phase jumps

•

User ability to manually add frequency offsets due to temperature or ageing (especially during holdover

state)

4.8

Reporting

The Time Synchronization Algorithm includes user reporting to aide in performance debugging, including:

•

Set of user notifications about packet network events, such as packet loss, small transient phase jumps,

large transient phase jumps, outliers, network path re-routes

•

Set of metrics related to the synchronization, such as frequency stability and phase stability

•

Independent reporting of the forward path and reverse path lock status

•

Oscillator stability analysis for excessive ageing or temperature variation

•

Server tracking impairments such as pull-in range exceeded

4.9

Product Number Support

There are several Time Synchronization Algorithm products.

The following table provides a summary of

support with the ZL3079x devices. Refer to ZLS30380 API User Guide section 1

.0 “Products”.

Product Number

Product Name

Supported

ZLS30387

Basic Frequency and Phase Support

No

ZLS30384

Intermediate

Frequency & Phase

Support

No

ZLS30383

Qualcomm

Small Cell Custom

No

ZLS30380

Advanced

Yes