Seagate ST3600002SS, ST3450802SS manual Transmitter signal characteristics

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10.5.2.2Transmitter signal characteristics

Table 25 specifies the signal requirements at the transmitter end of a TxRx connection as measured into the zero-length test load. All specifications are based on differential measurements.

The OOB sequence is performed at signal voltage levels corresponding to the lowest supported transfer rate. Table 25 specifies the signal characteristics.

Table 25: Transmitter signal characteristics

Signal characteristica	Units	1.5Gb/s	3.0Gb/s
Skewb	ps	20	15
Tx Off Voltagec	mV(P-P)	< 50	< 50
Maximum rise/fall timed	ps	273	137
Minimum rise/fall timed	ps	67	67
Maximum transmitter output imbalancee	%	10	10
OOB offset deltaf	mV	± 25	± 25
OOB common mode deltag	mV	± 50	± 50

aAll tests in this table shall be performed with zero-length test load shown in figure 18.

bThe skew measurement shall be made at the midpoint of the transition with a repeating 0101b pattern on the physical link. The same stable trigger, coherent to the data stream, shall be used for both the Tx+ and Tx- signals. Skew is defined as the time difference between the means of the midpoint crossing times of the Tx+ signal and the Tx- signal.

cThe transmitter off voltage is the maximum A.C. voltage measured at compliance points when the transmitter is unpowered or transmitting D.C. idle (e.g., during idle time of an OOB signal).

dRise/fall times are measured from 20 % to 80 % of the transition with a repeating 0101b pattern on the physical link.

eThe maximum difference between the V+ and V- A.C. RMS transmitter amplitudes measured on a CJTPAT test pattern (see 10.5.2.3.3) into the test load shown in figure 18, as a percentage of the average of the V+ and V- A.C. RMS amplitudes.

fThe maximum difference in the average differential voltage (D.C. offset) component between the burst times and the idle times of an OOB signal.

gThe maximum difference in the average of the common mode voltage between the burst times and the idle times of an OOB signal.

Cheetah NS 10K.2 SAS Product Manual, Rev. F

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Contents ST3600002SS ST3450802SS Cheetah NS 10K.2 SASPage Contents Installation Defect and error managementInterface requirements Seagate Online Support and Services Seagate Technology support servicesScope Standards Standards, compliance and reference documentsElectromagnetic compatibility Electromagnetic susceptibilityCompliance Reference documents General description Media description Standard featuresPerformance ReliabilityFormatted capacities Factory-installed optionsProgrammable drive capacity Internal drive characteristics Performance characteristicsAccess time Seek performanceGeneral performance characteristics Format command execution time minutesStart/stop time Cache operation Prefetch/multi-segmented cache controlCaching write data Prefetch operation Error rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsInterface errors Reliability and servicePreventive maintenance Hot plugging the driveControlling S.M.A.R.T 4 S.M.A.R.TPerformance impact Reporting controlPredictive failures Temperature Log Page 0Dh Parameter Code DescriptionThermal monitor Drive Self Test DSTImplementation DST failure definitionShort test Function Code 001b Product warrantyExtended test Function Code 010b Shipping AC power requirements Physical/electrical specificationsDC power requirements ST3600002SS DC power requirementsGeneral DC power requirement notes ST3450802SS DC power requirementsConducted noise immunity Power sequencingCurrent profiles Typical ST3600002SS drive +5V and +12V current profiles ST3600002SS Power dissipationST3450802SS Environmental limits Temperature a. OperatingEffective altitude sea level a. Operating Relative humidityShock and vibration ShockRecommended mounting Vibration a. Operating-normal Air cleanlinessAcoustics Corrosive environmentChina Restriction of Hazardous Substances RoHS Directive Physical dimensions Mechanical specificationsDrive internal defects/errors Defect and error managementDrive error recovery procedures 77.81 Background Media Scan SAS system errorsMedia Pre-Scan Deferred Auto-ReallocationIdle Read After Write Drive orientation InstallationAir flow CoolingGrounding Drive mountingInterface requirements SAS featuresDual port support Commands supported by Cheetah NS 10K.2 SAS family drives Scsi commands supportedCommands supported by Cheetah NS 10K.2 SAS family drives Commands supported by Cheetah NS 10K.2 SAS family drives Commands supported by Cheetah NS 10K.2 SAS family drives 10.3.2Mode Sense data Inquiry dataPage Mode Pages 10.3.2.1 ST3600002SS Mode Sense data10.3.2.2 ST3450802SS Mode Sense data Miscellaneous features Miscellaneous operating features and conditionsMiscellaneous status SAS physical interface Datum B Connector requirements Physical characteristicsPin descriptions Electrical descriptionSAS pin descriptions Power Signal characteristicsSAS transmitters and receivers Ready LED Out Differential signals LED drive signal General interface characteristics 10.5.2.1 Eye masks 10.5.2.1.1 Eye masks overviewReceive eye mask 2OP 0, 5 xadditional sinusoidal jitter X 1OP Transmitter signal characteristics Maximum allowable jitter Receiver signal characteristicsImpedance requirements Sheet 1 Compliant jitter test pattern CjtpatElectrical TxRx connections Impedance requirements Sheet 2= -5, 437dB Shows the zero-length test load Receiver characteristics SAS-2 Specification complianceAdditional information Cheetah NS 10K.2 SAS Product Manual, Rev. F Index Page SAS See also cooling Page Americas Seagate Technology LLC

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