Seagate ST3300056SS (FDE) manual Receive eye mask, Jitter tolerance masks, Absolute amplitude

Page 73

9.5.2.1.2Receive eye mask

Figure 18 describes the receive eye mask. This eye mask applies to jitter after the application of a single pole high-pass frequency-weighting function that progressively attenuates jitter at 20 dB/decade below a frequency of ((bit rate) / 1.667).

Absolute amplitude

(in V)

Z2

Z1

0V

-Z1

-Z2

0X1 X2 1-X1 1

1-X2

Normalized time (in UI)

Figure 18. Receive eye mask

Verifying compliance with the limits represented by the receive eye mask should be done with reverse channel traffic present in order that the effects of crosstalk are taken into account.

9.5.2.1.3Jitter tolerance masks

Figure 19 describes the receive tolerance eye masks and is constructed using the X2 and Z2 values given in

table 31. X1OP is half the value for total jitter intable 31 and X1TOL is half the value for total jitter in table 32, for jitter frequencies above ((bit rate) / 1.667).

Absolute amplitude (in V)

Z2

Z1OP

Z1TOL

0 V

-Z1TOL -Z1OP

-Z2

(additional sinusoidal jitter) / 2

Outline of eye mask before adding sinusoidal jitter

Outline of eye mask after adding sinusoidal jitter

0 X1OP

X2

1

 

 

1-X1OP

X1TOL

 

1-X1TOL

Normalized time (in UI)

Figure 19. Receive tolerance eye mask

Cheetah 15K.6 SAS Product Manual, Rev. B

69

Image 73
Contents ST3300656SS ST3450856SSST3146356SS Page Contents Installation Defect and error managementSeagate Technology support services Interface requirementsModel Number Full Disk Encryption FDE ScopeCheetah 15K.6 SAS Product Manual, Rev. B Standards Standards, compliance and reference documentsElectromagnetic compatibility Electromagnetic susceptibilityEuropean Union Restriction of Hazardous Substances RoHS ComplianceReference documents Cheetah 15K.6 SAS Product Manual, Rev. B General description Media description Standard featuresPerformance Reliability Factory-installed optionsFormatted capacities Programmable drive capacityCheetah 15K.6 SAS Product Manual, Rev. B Internal drive characteristics Performance characteristicsAccess time Seek timeGeneral performance characteristics Format command execution time minutesStart/stop time 176 144 100Cache operation Prefetch/multi-segmented cache controlPrefetch operation Caching write dataError rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenanceControlling S.M.A.R.T 4 S.M.A.R.TPerformance impact MillisecondsDetermining rate Reporting controlPredictive failures Thermal monitorState of the drive prior to testing Temperature Log Page 0Dh Parameter Code DescriptionDrive Self Test DST DST failure definitionShort and extended tests Invoking DSTShort test Function Code 001b Extended test Function Code 010bAbort Product warrantyShipping Product repair and return informationCheetah 15K.6 SAS Product Manual, Rev. B AC power requirements Physical/electrical specificationsDC power requirements ST3450856SS DC power requirementsST3300656SS DC power requirements ST3450056SS FDE DC power requirementsST3450056SS FDE Gbit mode Amps ST3300656SS Gbit mode AmpsST3146356SS DC power requirements ST3300056SS FDE DC power requirementsST3300056SS FDE Gbit mode Amps ST3146356SS Gbit mode AmpsST3146756SS FDE Gbit mode Amps ST3146756SS FDE DC power requirementsConducted noise immunity Power sequencingCurrent profiles Typical 450GB current profiles Typical 146GB current profiles ST3450856SS model Power dissipationST3450056SS FDE model ST3300656SS model ST3300056SS FDE model ST3146356SS model ST3146756SS FDE model in 3 Gbit operation Environmental limits TemperatureEffective altitude sea level Relative humidityShock and vibration ShockRecommended mounting Package size Packaged/product weight Drop heightVibration Air cleanlinessAcoustics Corrosive environmentMechanical specifications Physical dimensions Cheetah 15K.6 SAS Product Manual, Rev. B Drive internal defects/errors Defect and error managementDrive error recovery procedures 51.87 Background Media Scan SAS system errorsMedia Pre-Scan Idle Read After Write Deferred Auto-ReallocationDrive orientation InstallationCooling Air flow Grounding Drive mountingCheetah 15K.6 SAS Product Manual, Rev. B Interface requirements SAS featuresDual port support Commands supported by Cheetah 15K.6 SAS family drives Scsi commands supportedCommand name Command code Supported Commands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Commands supported by Cheetah 15K.6 SAS family drives Bytes Data hex Inquiry dataMode Sense data Mode Pages 2.1 ST3450856SS/ST3450056SS Mode Sense data2.2 ST3300656SS/ST3300056SS Mode Sense data 2.3 ST3146356SS/ST3146756SS Mode Sense data Miscellaneous features Miscellaneous operating features and conditionsMiscellaneous status SAS physical interfacePhysical interface Datum B Connector requirements Physical characteristicsElectrical description Pin Signal name Signal typePin descriptions SAS pin descriptionsPower Signal characteristicsSAS transmitters and receivers Ready LED OutDifferential signals LED drive signalGeneral interface characteristics Eye masks Eye masks overviewJitter tolerance masks Receive eye maskAbsolute amplitude Normalized time in UISinusoidal Peak-toJitter Frequency in kHzSignal characteristica Units Gbps Transmitter signal characteristicsSignal characteristic Units Gbps Receiver signal characteristicsMaximum allowable jitter Receiver jitter tolerance Impedance specificationsCompliant jitter test pattern Cjtpat Impedance requirements Sheet 1Impedance requirements Sheet 2 Transmitter characteristicsElectrical TxRx connections = -5,437dB Shows the zero-length test load Receiver characteristics Cheetah 15K.6 SAS Product Manual, Rev. B Internet Seagate Technology support servicesPresales Support Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Numerics IndexIraw SAS See also cooling