OSA 3230B Cesium Clock The OSA 3230B as G.811 Reference Clock Source using the Digital Cesium technology Introduction Telecommunication networks require highly accurate clocks for the effective transmission of digital signals. One of the primary objectives of telecommunication networks is to guarantee, at the connection between different networks, a slip rate of less than one slip in 72 days. Meeting these stringent specifications requires the implementation of a Primary Reference Clock (PRC) that must generate signals with an accuracy better than 1E-11, at all times. Generally, this is achieved using Cesium clock technology, often combined with GPS receivers as backup sources. Unlike off-air receivers, Cesium clocks are autonomous, self-contained primary references immune from external influences. Highlights The Oscilloquartz’s 3230B Cesium Clock is specifically designed and produced with the latest technology to serve complex applications where an extremely accurate reference signal is needed in a minimum size. The OSA 3230B Cesium Clock offers a unique set of operational features and performance, including greatly enhanced professional and easy integration into industrial, time and frequency host systems. With its long life cesium tube and its extremely high flexible output type capacity, the OSA 3230B is the most flexible and the most compact Primary Reference Clock Source available on the market, which will meet the most stringent requirements where any type of clock signal with G.811 performances is needed over a long period. Features Performances exceeding ITU-T G.811 / Stratum 1 PRC Accuracy better than ±1x10-12 during entire life Long life 10 years cesium tube Extremely compact size — 4U high (176mm) ETSI 240mm depth with front access connector, or 3U (132mm) 19’’ standards 400mm depth with rear access connectors Typical Applications 10 MHz and 5MHz sine wave output Wireline / Wireless Operators 100kHz to 50MHz programmable sine wave analog output Railways / Energy Companies Primary Reference Source for PRC system requiring a signal conform to G.811 / Stratum 1 Utilities 3x outputs configurable between 1PPS / 1MHz / 5MHz / 10MHz — TTL level 1 PPS external synchronization input Optional Signal Expansion, providing 5 additional outputs: 4x configurable between 1PPS / 10MHz / 2MHz (G703) / 2Mbits/s E1 (G703) with SSM / T1, + 1x programmable sine wave 100kHz to 50MHz Redundant DC power supply inputs or mixed AC+DC power supply (AC+DC only available on 19’’ version) OSA 3230B ETSI version Control and monitoring via alarm contacts and RS232 communication TCP/IP Remote management port for TL1 and/or SNMP management OSA3230B 19" version Oscilloquartz SA / Rue des Brévards 16 / CH-2002 Neuchâtel Switzerland / Tel.+41(0)32 722 55 55 / Fax+41(0)32 722 55 56 [email protected] / www.oscilloquartz.com

The OSA 3230B as G.811 Reference Clock Source using the Digital Cesium technology Typical Characteristics Cesium performances characteristics Wander generation Warm-up time 45 minutes @ 25°C Direct frequency outputs Output frequency Level & connectors: Output phase noise: Analog output: phase noise specifications) Digital outputs: Output level Output shape Synchronization input Type & connector: Power Supply Power feeds Power consumption side + lx on front side in 19" version) Optional mixed configuration lx AC+ lx DC power supply with Management / User interface Management port ment and / or...