Patented SXO-75 SynClock+ - Spectratime

iSync+ ® Smart SXO SynClock+ ® SpecVersion 1.17 (March 13 th , 2008)Ver. DLow-Cost GPS/E1/T1/Cesium-Synchronized Crystal Clock (SXO-75)Patented SXO-75 SynClock+ ®Auto-Adaptive SmarTiming+ ® Disciplining & Filtering @ 1ns ResolutionGPS/CesiumE1/T1TrackSyncAPPLICATIONSTelecom | Navigation | Broadcast | Defense | Instrument©SpectraTime Europe Headquarters North America Sales Officessales@spectratime.com +41.32.732.16.66 +1.512.470.3980spectratime.comSpecifications are subject to change without prior notice

iSync+ ® Smart SXO SynClock+ ® SpecKEY FEATURESSmart SXO-75 SynClock+ ® :• Single power supply voltage : 10 to 25V• Very small volume : 5.5 in 3• Frequency offset over temp. range : < +5E-10• Industry’s first SmarTiming+ ® technologyo REF locking resolution : 1nso REF disciplining/filtering/controlling : Auto adaptive (a)o Smart loop time constant : 100-10’000so E1/T1 jitter & wander : ITU-T G.823/824o REF locking mode (user settable) : Sync (b) or Track (c)o REF types (PRS (d) /Stratum 1 source) : GPS, Cesium, E1/T1, LORAN-C, Masero OUT frequency accuracy/stabilityo PRS (d) /Stratum 1 locked : 1E-12, typicalo Holdover (no PRS (d) ) :

iSync+ ® Smart SXO SynClock+ ® SpecSPECIFICATIONSELECTRICALSpecSmart SXO-75 SynClock+®Type Standard OptionsRFOUT Frequency10 MHzSynthesizer Output Frequency Not applicable 2.048 MHz, 1.544 MHz, etcRFOUT not available(ordering code: 2.048M or 1.544M)Frequency ChangeOperating temperature range(Thermal chamber with air flow)Aging(After 3 months of continuous operation)Short Term StabilityPhase Noise (dBc/Hz)(RFOUT 10 MHz)RFOUT available**(ordering code: 10M/2.048M or 1.544 M)** degraded spurious & sub-harmonicslevels≤ +5E-10–5°C to +60°C< 1E-10 /day(typical: 4·E-11/day)1 to 100 s < 2E-111 Hz10 Hz100 Hz1k Hz10K HzFrequency RetraceOff/On(In stable temperature, gravity, pressure& magnetic field conditions)Warm-up Time @ +25°CFrequency stabilityAnalog Frequency Adjustment[An external voltage (0-5 VDC) can beapplied to pin 6 (FA). The cursor pin of a10 kΩ variable resistor placed betweenpin 7 and GND can provide this voltage.If not used, pin 6 must be floating]Digital Frequency Adjustment(Through RS-232 commands)RFOUT LevelsOutputSpurious f 0 ± 100kHzSub-harmonicsSynthesizer OptionOutput levelFrequency rangeSpuriousFrequency resolutionSupply Voltage (DC)Max Power Supply RippleInput PowerWarm up @+25°C- 5°C+25°C+65°CCommunication InterfaceProtocol speedCompatible with10 MHz-90-120-135-145-150< 1E-824 hr / 1 hr15 min< 5E-8> 4E-7 (±2E-7)> 4E-7 (±2E-7)Sine wave 0.5 VRms (± 10% / 50Ω)< -80dBc **< -60dBc **** Not applicable when both RFOUT & synthesizer outputs are availableFor optional frequency onlySquare wave CMOS 5VNot applicable1 to 30 MHz (factory setting)-80dBc1 KHz10 to 25 V< 50 mV peak to peak (from 1Hz to 1 MHz frequency band)Typical < 12 W @ 12 V & < 16 W @ 24 V< 8 W< 6 W< 3 WRS-232 commands for control & monitoring (see commands below)Timing and locking control functions VMGA messages9600, n, 8, 1SRO model©SpectraTime Europe Headquarters North America Sales Offices Page 3 of 10sales@spectratime.com +41.32.732.16.66 +1.512.470.3980spectratime.com

iSync+ ® Smart SXO SynClock+ ® SpecSMARTIMING+ ® DISCIPLINING & FILTERINGSpecSmart SXO-75 SynClock+®PPSREF LevelReference typesCMOS 0-5V or 0-3.3V rising edgeGPS, E1, T1, Cesium, LORAN-C, Maser, etcDisciplining & filtering Auto-adaptive through SmarTiming+ ® technology (request white paper)Disciplining modeArchitecture ModelSync (phase alignment) or Track (frequency alignment)See Principles of Operation belowGPS Receiver Comm. InterfaceGPS control & monitoringT-RAIMPosition holdMulti-vendor GPS supportPins 12 & 16 Serial Interface (see pin-out info below)Continuous monitoring for optimum timing, if supported by GPSUser settable for optimum timing, if supported by GPSPPSOUT Output LevelCurrentCMOS 0-5V± 20 mA sink/sourcePPSOUT Pulse Width (PW)Duty cycleUser settable0 to 1s in 50 ns/stepPPSOUT to PPSREF Sync Error< 50 nsConditions (Sync mode)PPSOUT to PPSREF (DE)Programmable delay (Track mode)PPSOUT Holdover Time StabilityTemperature window(After learning phase > 10 τ)Smart Loop Time ConstantPhase/FrequencyUser settable< 10µs / 24 hrWithin ±2°CNo PPSRef noise, ± 1°C temp fluctuations0 to 1s50 ns / step< 7µs / 8 hrWithin 40°CAuto-adaptive 100 to 10’000 secSync/Trak modeRS-232 command interface< 4µs / 6 hrWithin 20°CENVIRONMENTALSpecSmart SXO-75 SynClock+®Magnetic Field Sensitivity< 2 · 10 -10 / Gauss in worst axisStorage Temperature - 55°C to + 85°CHumidity GR-CORE-63, Section 5.1.2Operating Vibration GR-CORE-63, Section 5.4.2Random and Sinusoidal MIL-PRF-28800F, Class 3, 4ShockSurvival: 40g / 11msG-Tip-Over Test< 5E-10 / g in worst axisPHYSICALSpecSize (L x W x H)WeightMounting & Mechanical LayoutConnectorCompatible withSmart SXO-75 SynClock+®3.25” x 2.25 “ x 0.75” (82.55 x 57.15 x 19.05 mm)200 g (7.1 oz)See drawings belowMale D-sub 25 pins (see drawing below)SRO modelMODEL ORDERING INSTRUCTIONSSXO-75 / XX / XX / 10M↓ ↓ ↓ ↓Type Option(s) Frequency (standard)©SpectraTime Europe Headquarters North America Sales Offices Page 4 of 10sales@spectratime.com +41.32.732.16.66 +1.512.470.3980spectratime.com

iSync+ ® Smart SXO SynClock+ ® SpecSmarTiming+ ® SXO SynClock+®EXECUTIVE PRINCIPLES OF OPERATIONThe smart SRO/SXO SynClock+ ® uses SmarTiming+ ® technology. It auto-adaptively locks multi-vendorStratum-1 references such as GPS, Cesium, LORAN-C, CDMA and E1/T1 at industry’s first 1ns resolution forthe highest performance level, and generates a perfectly aligned 1PPS output signal (PPSOUT) and time of day(TOD) information.As illustrated in Fig. 1 below, the smart SXO has two basic modes of operation: “Track” and “Sync”. “Track” isused for frequency alignment while “Sync” is used for phase alignment applications.In “Track” mode, the smart SXO uses an external PPS reference (PPSREF) to align the frequency of the SXO.The frequency alignment is computed by an internal phase-time error signal that is generated by an internalPPS signal (PPSINT), which measures the signal at 1ns resolution through its SmarTiming+ ® technology. ThePPSINT then aligns the PPSREF phase.In the “Sync” mode, the smart SXO phase aligns the PPSOUT to the PPSREF with the PPSINT referencesignal, which uses SmarTiming+ ® algorithm to 1) compare the PPSOUT and PPSREF signals at 1ns resolutionwithin a ± 500ns dynamic range and 2) auto-adaptively align them.The smart SXO has also the capability to dynamically analyze the stability of the PPSREF signal through theexcellent short-term frequency stability of the internal high end crystal resonator. Thus, the 1PPS reference of aStratum-1 source such as GPS can be directly fed to smart SXO without specific analysis of the internaloptimization parameters of the GPS engine - i.e., number of satellites in view, signal to noise ratio, etc.2Timer10 MHz Xtal osc20MHzCounterPPS_OUT time mark settingComparatorPPSOUT20PPS_INT time mark settingComparatorMicro-controllerPPS_REF time taggingPPS_REF time taggingRegister1 ns. resolution / 1us rangefine phase comparatorPPSREF81KTrack/Sync510K10K/Sync/Track14151K/txd GPS/rxd GPS1612TxD1810KRxD19Fig.1: SmarTiming+ ® Control Block Diagram©SpectraTime Europe Headquarters North America Sales Offices Page 5 of 10sales@spectratime.com +41.32.732.16.66 +1.512.470.3980spectratime.com

iSync+ ® Smart SXO SynClock+ ® SpecAs illustrated in Fig. 2 below, the “Track” mode aligns the PPSINT to the PPSREF within 50ns. After about 10τ ,the PPSINT is perfectly aligned to the PPSREF.The smart SXO is also capable to perfectly align the PPSOUT to the PPSREF or to adjust the PPSOUT from 0-1s with a 50ns resolution. This time adjustment can be programmed through the RS232 interface. After adescending edge of the “Sync” signal, the PPSOUT will be aligned to the PPSREF (see figure 2).Normal initialsituationIn free-runAfter track set-up,PPSINT is alignedwithin 50ns toPPSREF

iSync+ ® Smart SXO SynClock+ ® SpecTiming & Locking Control Functions:Using the same data interface, the smart SXO SynClock+ ® models can accept the following basic ASCIIcommands: Data is in decimal ASCII code.CommandnameSyntaxcommandData field(if any)ResponsesyntaxIdentification ID - TNTSXO-aaa/rr/s.ssResponse data(if any)aaa: 075 if SXO-75rr: revision numbers.ss: software versionSerial number SN - xxxxxx xxxxxx : 6 digits serial nbrStatus ST - s s:Statuss=0 :warming ups=1 :tracking set-ups=2 :track to PPSREFs=3 :synch to PPSREFs=4 :Free Run. Track OFFs=5 :PPSREF unstable(hldovr)s=6 :No PPSREF(holdover)s=7 :factory useds=8 :factory useds=9 :faultSet TrackingPPSINT -PSSREFSetSynchronisationPPSOUT –PPSINTSet PPSOUTdelay (rounded to50ns)Set PPSOUTPulse Width(rounded to 50ns)TRxSYxDEdddddddddPWdddddddddx=0 : Track neverx=1 : Track nowx=2 : Track everx=3 : Track now + everx=? : InterrogationX=0 : Synch. neverx=1 : Synch. nowx=2 : Synch. everx=3 : Synch. now + everx=? : Interrogationddddddddd=delay in ns.Max 999999950DE000000000 :synch toPPSREFddddddd=pulse Width by 1nsstep. Max 999999950xxddddddddddddddddddx:Tracking commands statusx=0 : Track OFFx=1 : Track ON(when Status 0 -> 4x:Sync. commands statusx=0 : Synch. OFFx=1 : Synch. ON(When Status 1 -> 2)ddddddddd=delay in ns.Min 000000050Max 999999950PW000000000: no pulseTime of day TD - hh:mm:ss hh:hoursmm:minutesss:secondsSet time of day TDhh:mm:ss hh:Hoursmm:Minutesss:secondshh:mm:ssddddddddd=Pulse Width by 1nsstep. Max 999999950000000000: no pulsehh:hoursmm:minutesss:secondsDate DT yyyy-mm-dd yyyy : yearmm : monthdd : daySet dateBeat everysecondon serial port.Set frequencyadjustmentDT yyyy-mm-ddBTxFCsdddddyyyy : yearmm : monthdd : dayx=0 : Stop beatx=1 : Effective Time intervalPPSOUT vs PPSREFx=2 : Phase comparatorx=3 : Both x=1 & x=2x=4 : Beat Time of dayx=5 : Beat statusx=6 : Beat x=7 : Beat Date, Time, Statusx=A : Beat NMEA $PTNTA,x=B : Beat NMEA $PTNTS,B,x=Z : Beat NMEA $LOZDA,..s=+/- signeddddd = limited within range–32768/+32767 (signed int)FC ?????? : interrogationyyyy-mm-dddddddddddorsppp orddddddddd sppp orhh:mm:sssyyyy-mm-dd hh:mm:ssssdddddyyyy : yearmm : monthdd : dayddddddddd : delay in 1ns(rounded to 50 ns)sppp:phase error in nss: +/- signehh:hours mm:minutesss:secondess: statusyyyy:year, mm:month,dd:days: +/- signeddddd : frequ. adj. in approx.6 · 10 -12 stepSet frequencysave. Integralpart, when Status= 2, 3FSxx=0 : never savex=1 : save every 24 hoursx=2 : save right nowx=3 : save actual freq. nowx=? : interrogationxx=0 : never savex=1 : save every 24 hours©SpectraTime Europe Headquarters North America Sales Offices Page 7 of 10sales@spectratime.com +41.32.732.16.66 +1.512.470.3980spectratime.com

iSync+ ® Smart SXO SynClock+ ® SpecCommandnameSet TrackingWindow (roundedto 50ns)Set no AlarmWindow (roundedto 50ns)Set trackingphase loop timeconstantSet modulecustomizationSet phasecomparatorOffsetView PPSRefSigmaView TimeconstantFreeze thermalcorrection alwaysFreeze frequencyduring trackingSyntaxcommandTWdddddAWdddddTCddddddMCsxx [cc…c]COsdddData field(if any)ddddd = Half TrackingWindow in ns.From 00050 to 12750ddddd = ????? : interrogationddddd = Half no AlarmWindow in ns.From 00050 to 12750ddd = ????? : interrogationdddddd = Time constant inseconds (001000 to 999999)TC000000 : change to auto.(

iSync+ ® Smart SXO SynClock+ ® SpecPIN-OUT INFORMATIONPin # Smart SXO-75 SynClock+® Compared toDirSmart SRO-100 SynClock+®1 10V to 25V 12V(11.2 to 16) or 24V (18 to 32) Input2 10V to 25V 12V(11.2 to 16) or 24V (18 to 32) Input3 GND GND Ret4 NC (Future use. Pulled to TTL high) Rb lock (open collector) (lock=open) Output5 Track/Synch Alarm (TTL+1K) (lock=0V) Track/Synch Output6 FA (analog frequency adjust input) FA Input7 Vref out (+5V internal reference) Vref out Output8 PPSREF (reference time pulse) PPSREF Input9 NC (Factory use or diagnostics) NC (Factory use or diagnostics) Output10 GND GND Ret11 Synthesizer (Square wave 5V CMOS) / NC(standard version)Factory useNA12 /RxD 2 GND Input13 NC (Future use. Grounded with 1kΩ) 60M Output14 /Sync(synchronize PPSOUT to PPSREF) /Sync Input15 /Track (PPSREF phase tracking) /Track Input16 /TxD 2 NC Output17 /Reset (Micro controller) /Reset Input18 TxD (RS232 Transmit 0-5V) TxD Output19 RxD (RS232 Receive 0-5V) RxD Input20 PPSOUT (output time pulse from internal clock) PPSOUT Output21 GND GND Ret22 GND GND Ret23 GND GND Ret24 RFOUT(10MHz sinus 7dBm into 50Ω) / NC RFOUT(5, 10 or 15MHz sin. 7dBm/50Ω) Outputaccording to option25 GND GND RetMOUNTING & MECHANICAL LAYOUTMounting Description:Heat sink options:1) Mount the SXO on a copper ground PCB with the provided thermal pad or thermal paste in between and a base plateunder the PCB2) Mount the SXO against a system chassis using the 4xM2 screws with the provided thermal pad or thermal paste inbetween and wire bridge the D-Sub connector3) Mount a radiator on top of the SXO with the provided thermal pad or thermal paste in between, if no base plate isavailableApply thermalpad deliveredwith each unitChassismounting©SpectraTime Europe Headquarters North America Sales Offices Page 9 of 10sales@spectratime.com +41.32.732.16.66 +1.512.470.3980spectratime.com

iSync+ ® Smart SXO SynClock+ ® SpecMechanical Dimensions (SXO)Not to scale. European drawing. Dimensions in inch (mm)(M2)(68.6)(5.6)(82.6)(48.3) (4.5)(7.65)2.25(57.2)(19.1)Connector Front View (SXO/SRO Compatible)Male D-Sub 25 Pins©SpectraTime Europe Headquarters North America Sales Offices Page 10 of 10sales@spectratime.com +41.32.732.16.66 +1.512.470.3980spectratime.com