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11 Filemode
Page 2
Samplerate:samplingrateofthechannels
- internally ratedfrom 1 sto20min
- externally ratedthroughthe logicalchannel16
Start:startconditionoftheacquisition
- Manual: withtheF2key Urgetriggering
- Trigger:withanassociationoftheanalogicalorlogicalchannels-seeChapter6
Trigger
- Waitingfor:afteradelayorataprecisedateandtime
- Automatic:immediate;automaticstopwhentheblockisfull
Stop:stopconditionoftheacquisition
- Automatic: whentheblockisfull
- Trigger:withanassociationoftheanalogicalorlogicalchannels-seeChapter6
Trigger
Triggermode DoubleTrigger:seebelow Memorymode
Following:actionsaftertheendoftheacquisition
- Stop: noaction
- Ream:waitingforthestartcondition
- ChangeSetup:loadingaconfigurationandwaitingforthestarttrigger
11.2.Limits
Real-timeacquisitionsonfilearelimitedbythetransferratebetweentheinputsandthesaving
hardwareliekaninternalharddiskoraUSBkey.
Thislimitdependsonthetypeoftheacquisitionfile:binaryorascii.
11.1.1.Binaryfile
Themaximumtransferrateis1,200,000bytes/s(1.2Mbyte/s).
Inordertoknowthenumberofchannelsthatyoucanrecordforagivenacquisitionperiod,you
havetocalculate:
numberofchannels=1,200,000xacquisitionperiod
example:acquisitionperiod:10 s
numberofchannels=1,200,000x10 s=maximum12channels
11.1.2.Asciifile
Themaximumtransferrateis1,000bytes/s(1.0Kbyte/s).
Theminimumacquisitionperiodis1ms.
Inordertoknowthenumberofchannelsthatyoucanrecordforagivenacquisitionperiod,you
havetocalculate:
numberofchannels=1000xacquisitionperiod