Axis Q1942-E - Performance Considerations

AXISQ1942-EPTMountThermalNetworkCamera
Technicalspecifications
Powerconnector
2-pinterminalblockforDCpowerinput.UseaSafetyExtraLowVoltage(SELV)compliant
limitedpowersource(LPS)witheitheraratedoutputpowerlimitedto≤100Woraratedoutput
currentlimitedto≤5A.
RS485/RS422connector
Two2-pinterminalblocksforRS485/RS422serialinterfaceusedtocontrolauxiliaryequipmentsuchaspan-tiltdevices.
Theserialportcanbeconguredtosupport:
•Two-wireRS485halfduplex
•Four-wireRS485fullduplex
•Two-wireRS422simplex
•Four-wireRS422fullduplexpointtopointcommunication
FunctionPinNotes
RS485BaltRS485/422RX(B)
1
RS485AaltRS485/422RX(A)
2
RXpairforallmodes(combinedRX/TXfor2-wireRS485)
RS485/RS422TX(B)
3
RS485/RS422TX(A)
4
TXpairforRS422and4-wireRS485
Important
Therecommendedmaximumcablelengthis30m(98.4ft).
PerformanceConsiderations
Whensettingupyoursystem,itisimportanttoconsiderhowvarioussettingsandsituationswillaffectperformance.Somefactors
affecttheamountofbandwidth(thebitrate)required,otherscanaffecttheframerate,andsomeaffectboth.Iftheloadonthe
CPUreachesitsmaximum,thiswillalsoaffecttheframerate.
Thefollowingfactorsareamongthemostimportanttoconsider:
•Highimageresolutionand/orlowercompressionlevelsresultinimagescontainingmoredata.Bandwidthaffected.
•AccessbylargenumbersofMotionJPEGand/orunicastH.264clients.Bandwidthaffected.
•Simultaneousviewingofdifferentstreams(resolution,compression)bydifferentclients.Effectonframerateand
bandwidth.
•AccessingMotionJPEGandH.264videostreamssimultaneously.Framerateandbandwidthaffected.
•Heavyusageofeventsettingsaffecttheproduct’sCPUload.Framerateaffected.
•UsingHTTPSmayreduceframerate,inparticularifstreamingMotionJPEG.
•Heavynetworkutilizationduetopoorinfrastructure.Bandwidthaffected.
•Viewingonpoorlyperformingclientcomputerslowersperceivedperformance.Framerateaffected.
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