STM-S3E 데이터 시트보기 (PDF) - Unspecified

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STM-S3E

Stratum 3E Timing Module

Unspecified 

3E Phase Build Out > 34 ppm

Frequency Change

Figure 14

Mode Switch Timing

Figure 15

Phase

Buildout

Indicator

Mode

Alarm

t1

t1

t2

t1

t1 = A transition period between 400 ms to 402.125 ms

t2 = A transition period of 2.125 ms

Change in

Control Inputs

Operational Mode

Indicator

∆tm

2 msec <∆tm < 4.125 msec

Loss of Reference Timing

Figure 16

RFL Alarm Timing

Figure 17

External

Reference

Input

Alarm

tAon

2 msec < tAon < 6.125 msec

0 msec < tAoff < 2.125 msec

RFL Limit High

Frequency

Sync_Out

(Nominal Frequency)

RFL Limit Low

Frequency

RFL Alarm

∆t

tAoff

0 < ∆t < 2.125 msec

*The DDS is updated only when the output changes level. The maximum

update rate is 8 kHz

Preliminary Data Sheet #: TM012 Page 13 of 16 Rev: P06 Date: 05/20/ 02

© Copyright 2002 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice

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