11 Filemode
Page 2
Samplerate:samplingrateofthechannels
-internally ratedfrom 1sto20min
-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