DATUM FTS 4040A/RS CESIUM FREQUENCY …

1 DATUM FTS 4040a /RSCESIUM FREQUENCY STANDARDThe DATUM FTS 4040A/RS meets the need for precision timing and frequencycontrol in a variety of stringent applications. This Primary Timing & FrequencyReference Standard is especially suited for use in communications, navigation,test and measurement: Stratum 1 master clock reference communications systems & telephone networks Synchronization of satellite ground terminals and remote stations Calibration of secondary quartz and rubidium slave clocks Troubleshooting network synchronization problems Integrity monitoring of Global Positioning System (GPS) All of these above applications take advantage of the accurate, stable, andspectrally pure sinusoidal signals available from DATUM FTS 4040A/RS . The unitsuse CESIUM beam tube technology to stabilize the output of an integral oven-controlled quartz crystal oscillator. This oscillator drives output signals at 1, 5, and10 MHz, and optionally at telecom rates and formats, 1544 or 2048 kbps.

2 Amicroprocessor performs the following tasks: Digital demodulation and integration of the servo loop signals Monitoring of system parameters OCXO FREQUENCY locked to a CESIUM resonance pedestal (search phase)and peak (normal operation) Automatic compensation for CESIUM tube signal level changes C-Field lock to Zeeman resonance peak Microwave power levels continuously optimizedKEY ADVANTAGES Long CESIUM Beam Tube Life Span No Calibration Necessary - No Aging Programmable TTL Output Global Timing SolutionsDATUM FTS 4040A/RS CESIUM FREQUENCY STANDARD RF Output:Frequency1 each at 1,5,10 MHzAmplitude>1 VrmsHarmonic signals<_40 dBcNon-harmonic distortion<-80 dBcConnector type*BNCLoad impedance50 ohmsLocationrear panel* For telecom options three possible connector types are available: Twin BNC, Weco 310, and Bantam Programmable , 1, 5, 10 MHzAmplitude/wave shape> V pk into 50 ohms, typeBNCL ocationrear panel Telecom Output Connector Options:Option Suffix Letter*Connector TypeTTwin-BNCWWeco 310 BBantam* When ordering with a telecom output option specify desired connector type with the suffix letter shown above along with the telecom output option designation - 264/TSpecifications (@ 25 degrees unless otherwise specified) Performance Parameters: DATUM FTS 4040a /RSHigh PerformanceAccuracy1<2 x 10-12<1 x 10-12 Warm-up Time(typical)30 min30 minReproducibility< x 10-12<5 x 10-13 StabilityAveraging Time(s)Allan DeviationAllan Deviation100< x 10-11< x 10-12101< x 10-11< x 10-12102< x 10-12< x 10-13*103< x 10-12< x 10-13*104< x 10-13< x 10-14*105< x 10-13< x 10-14*floor< x 10-14< x 10-14 SSB Phase Noise Offset (Hz)10 MHZ10 MHZ100-90 dBc-90 dBc101-120 dBc-120 dBc102-140 dBc-140 dBc*103-145 dBc-145 dBc*104-145 dBc-145 dBc*105-150 dBc-150 dBcStabilityRange 1 x 10-9 1 x 10-9 Resolution1 x 10-151 x 10-15 Controlvia RS232 portvia RS232 port1100% verified & calibrated against FTS in-house standard.

3 *excluding environmental effects Power Requirements:ACDCO perating Voltage90 to 132 V 22 to 56 V180 to 263 VFrequency Range47 to 63 Hz400 HzPower(operating)110 VA, 65W60W(warm-up)140 VA, 90W90W Dimensions:(EIA-310C) " (133mm)Width (front Panel) " (483mm)(instrument) " (440mm) " (439mm) Weight:45 lbs ( kg)Additional shipping 34 lbs ( kg)weight for reusable HAZMAT container Options1 PPS OutputTelecom Synthesizer at 1544 kbps-Direct Digital SynthesizerTelecom Synthesizer at 2048 kbps-High Performance CESIUM TubeDATUM markets its products and services through a global network of experienced electronicprofessionals. For assistance, additional information, or to place an order, please call Tozer Road,Beverly, MA 01915-5510 Phone: (+1) Fax: (+1) Free: our Web sites at information on other DATUM locations, products, and local representative is:Specifications subject to change without notice.(Rev. 6/98)