SM34 datasheet(11/31 Pages) CONNOR-WINFIELD

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SM34 Data Sheet #:

TM095

Page 11

Rev:

05 Date: 11/19/12

Specifications subject to change without notice

Detailed Description continued

The automatic reference selection is shown in the following state diagram:

The operational mode is according to the following state diagram:

No available reference and no Hold Over history

Ref loss w/no good Hold Over history and no other available reference

Automatic Reference Selection

Figure 6

Automatic Operational Mode Selection

Figure 7

Locked

on Ref n

Select &

Lock on

Ref m

Ref n returns,

Ref m marked

“non-revertive”

Locked on Ref m

time for t=

Ref_Rev_Delay

time expired

Loss of Ref n

Select new reference:

Qualified (within max. pull-in range, signal present > 10 sec.),

Non-masked

Ref n returns,

Ref m marked

“revertive”

Next highest priority,

Stay

Ref

Return

Ref Loss w/good hold over history

and no alternate reference available

Ref Loss w/alternate

reference available

Return

Ref

Ref loss w/no good hold

over history and no other

available reference

No available

reference and

no hold over

history

Reference Available

Locked

Hold Over

Free Run

(Select highest priority)

Higher priority Ref return with

prior reference marked

“revertive”

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