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MSTM-S3-T2NC

更新时间： 2024-11-04 05:50:31

品牌	Logo	应用领域
CONNOR-WINFIELD		/
页数	文件大小	规格书
7页	248K
描述
STRATUM 3 SIMPLIFIED CONTROL TIMING MODULES

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MSTM-S3-T2NC 数据手册

THE CONNOR-WINFIELD CORP.

Stratum 3 Simplified Control

Timing Modules (MSTM-S3-T2NC)

Fig. 1.0

DESCRIPTION

MSTM-S3 PIN ASSIGNMENT

The Connor-Winfield Stratum

Miniature

Simplified Control Timing Module acts as a complete system

clock module for general Stratum 3 timing applications. The

MSTM is designed for external control functions. Full

external control input allows for selections and monitoring of

any of four possible operating states: 1) Holdover, 2) External

Reference #1, 3) External Reference #2, and 4) Free Run. The

table below illustrates the control signal inputs and

corresponding operational states:

HOLDOVER

REF 1

REF2

+5Vdc

EX REF 1

GND

EX REF 2

GND

FREERUN

GND

ALARM OUT

CNTL A

CLK_OUT

GND

In the absence of External Control Inputs (A,B), the

MSTM enters the Free Run mode and signals an External

Alarm. The MSTM will enter other operating modes upon

application of a proper control signal. Mode 1 operation (A=1,

B=0) results in an output signal that is phase locked to the

External Reference Input #1. Mode 2 operation (A=0, B=1)

results in an output signal that is phase locked to External

Reference Input #2. Holdover mode operation (A=1, B=1)

results in an output signal at or near the frequency as

determined by the latest (last) locked-signal input values

and the holdover performance of the MSTM.

CNTL B

PLL TVL

SYNC_OUT

GND

BOTTOM VIEW

Fig. 2.0

BLOCK DIAGRAM

FREERUN

CNTL A

CNTL B

REF 1

REF 2

2:4

PLL TVL

FREE RUN

HOLDOVER

Alarm signals are generated at the Alarm Output

during Holdover and Free Run operation. Alarm Signals are

also generated by loss-of-lock, loss of Reference, and by a

Tune-Limit indication from the PLL. A Tune-Limit alarm

signal indicates that the OCXO tuning voltage is

approaching within 10% the limits of its lock capability and

that the External Reference Input may be erroneous. A high

level indicates an alarm condition. Real-time indication of

the operational mode is available at unique operating mode

outputs on pins 1-4.

ALARM

OUT

LOCK AND

DETECTION

2:1

MUX

EX REF 1

EX REF 2

SYNC_OUT

DAC

STRATUM3

OCXO

DAC

FIFO

FILTERS

TUNING

VOLTAGE

MONITOR

TCXO

Connect

CLK_OUT

Control loop filters effectively attenuate any

reference jitter and smooth out phase transients.

PLL TVL

MSTM-S3

Table 1.0

CONTROL

INPUT

OPERATIONAL MODE

REF 1

REF 2

HLDOVER

FREERUN

PLL TVL

ALARM

OUTPUT

Free Run (Default)

External

Normal

Reference #1

Tune Limit

LOS+LOL

Normal

External

Reference #2

Tune Limit

LOS+LOL

Holdover

Specifications are subject to change without notice

DATA SHEET #: TM020

DATE: 7/18/00

REVISION #: P00

Page 1 of 7

FILENAME: TM020.DOC

12 3 4 5 6 7

中文翻译

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与MSTM-S3-T2NC相关器件

型号	品牌	获取价格	描述	数据表
MSTM-S3-T2NC-R	CONNOR-WINFIELD	获取价格	Clock Generator,
MSTM-S3-TR	CONNOR-WINFIELD	获取价格	Stratum 3 Timing Module
MSTM-S3-TR_15	CONNOR-WINFIELD	获取价格	Stratum 3 Timing Module
MSTM-S3-TR-12016.384M	CONNOR-WINFIELD	获取价格	Stratum 3 Timing Module
MSTM-S3-TR-12019.44M	CONNOR-WINFIELD	获取价格	Stratum 3 Timing Module
MSTM-S3-TR-12-019.44M	CONNOR-WINFIELD	获取价格	Telecom Circuit, 1-Func, MODULE-18
MSTM-S3-TR-1202.048M	CONNOR-WINFIELD	获取价格	Stratum 3 Timing Module
MSTM-S3-TR-12032.768M	CONNOR-WINFIELD	获取价格	Stratum 3 Timing Module
MSTM-S3-TR-12038.88M	CONNOR-WINFIELD	获取价格	Stratum 3 Timing Module
MSTM-S3-TR-12-038.88M	CONNOR-WINFIELD	获取价格	Telecom Circuit, 1-Func, MODULE-18

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