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attila

Technical Forum Moderator
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Posts posted by attila

  1. Hi @GCompton

    With the current sw version you can select Trigger 1 to output 'Scope Detector' and select Sampling Clock T1
    This will store one sample for each trigger event with 15 cycle delay, 150ns delay for 100MHz or 120ns with 125MHz system frequency.
    The next version will let you select directly 'Scope Detector' as Sampling Clock.

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  2. Hi @rjratnip

    1. It could be an adapter/cable contact problem.
    2. The AUX supply can only be blocked by the the under/overvoltage 4.11V/5.76V protection circuit.
    You could have a grounding issue. Are the RPi and 5V supplies floating or grounded ? If both are grounded make sure to use nearby sockets, same splitter.
    With the default 'USB Power' 'Stop with AUX' the USB supply line is turned off if the AUX voltage is ok, 4.5V...5.5V
    If this option is 'Always ON' the USB and AUX currents will balance according the voltage/cabling resistance. If the USB voltage is higher than AUX, the AUX current will be lower. 

    Verify the voltage of your supply or use powered HUB.

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  3. Hi @GCompton

    The AD3 bandwidth of 9/30MHz may be too low for such pulse lengths.
    The device has sampling clock option trigger IOs but this requires digital level signal. Now I tried to enable a sample on analog trigger event but this with the current 'firmware' has a minimum trigger to sampling delay of 12cycles, 96-120ns
    The only eventual option I see is capturing more data, with min/max sampling and processing it.

  4. Hi @joshna

    Probably the V_DS input voltage on the analog input channel is out the range. 
    The analog inputs of AD3 have two input ranges, approximately 5V and 50V pk2pk, and adjustable offset.
    Set offset or range dwf.FDwfAnalogInChannelOffsetSet(hdwf, #, c_double(2.5)) or dwf.FDwfAnalogInChannelRangeSet(hdwf, #, c_double(50.0))

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