TM-056 Datasheet, PDF (1/7 Pages) Vectron International, Inc – Integrated Timing Solution

TM-056
Integrated Timing Solution
The TM-056 is a compact Timing Module, which functions as a complete system clock solution for general Stratum 3 timing applications. The
TM-056 uses Vectron’s Digital and Analog Phase Locked Loop (DPLL and APLL) technology and can lock to 2 reference frequencies automatically.
The module has dual output clocks ranging from 8 kHz to 77.76 MHz. Simple control interface with comprehensive state engine, status and
alarm indications and fully automatic operation makes seamless system integration of the TM-056 module.
Features
Applications
• Single module Statum 3 synchronization solution.
• Complies with Telcordia GR-1244/GR-253 and ITU-T G.812/G.813
recommendations.
• Supports Free-run, Holdover and Lock modes.
• Accepts 2 reference inputs from frequency range 8kHz to 77.76MHz.
• Continuously monitors and evaluates both input reference signals
simultaneously.
• Provides two synchronized outputs with frequency range up to 77.76MHz.
• On board OCXO that provides excellent stability in Freerun and Holdover
mode.
• Loop filtering utilizing DPLL.
• Automatic “hit-less” switchover on loss of input.
• Holdover mode with 90 seconds of history.
• Alarms and status signals.
• Easy to use control interface and JTAG port for factory programming.
• Small dimensions 1.9” x 1.9” x 0.55”.
• Product is compliant to RoHS directive and fully compatible with lead free
assembly.
• Multi-service Switches and Routers
• ATM
• Gateway
• Access
• EDGE
• Core
• SONET
• SDH
• DWDM
Block Diagram
OCXO
EX REF 1
EX REF 2
Reference
Monitor
and
Selection
DPLL
APLL
Output
Dividers
OUT 1
OUT 2
CNT 1
CNT 2
CPU
HOLDOVER
REF 1
REF 2
FREERUN
ALARM
UNLOCK
Vectron International • 267 Lowell Road, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com