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having problems with acquisition start time when I acquire two channels

Hello,This is the first time I have been working with labview so I need some help.
I'm trying to acquire the signals from two channels (1 and 2) of a DSO5014a agilent scope, using channel 4 as trigger.
I'm using Labview 8.5 to creat the acquisitin program, and I'm using a LAN cable to comunicate with the scope.
I can acquire the signals, but when I change the "acquisition start time" (I want to move the signal in the screen of the scope so the signal starts at the beginning of the screen instead of in the middle).When it is different to zero sometimes acquire ok, sometimes it is not moved the "acquisition start time" I stablished but something different,and sometimes I can't acquire anything.However if the acquisition start time is 0, everything is ok.
I don't know what's happening.Do you have any idea, please?
Thanks in advance, If I was not very clear, ask me please.
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THe problem is solved!When I tried to initialize i reset the set up, so that's the reason it changed.
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Glad to hear so.

 

 

NOTA: Si escribes desde España puedes escribir en español.

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