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attila

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Posts posted by attila

  1. Hi @gcb

    Continuous digital play is not available with any device.
    The Digital Discovery has Play mode for up to 256MiB of data.
    Other device support 'unlimited' AWG Play which could also be used as 1bit digital line.
    Analog Discovery with 32k device buffer up to about 4MS/s. ADP3X50 has 32Mi AWG sample device buffer, ADP2230 has 128Mi buffer and USB3.

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  2. Hi @Sam S.

    For Network Analysis triggering is usually not important but your trigger settings seems to be ok.
    For stability, to not to trigger on opposite edge due to noise, you can use FDwfAnalogInTriggerHysteresisSet.
    Better use trigsrcAnalogOut1. The NA interface uses this for coherent averaging.

    You could also apply to FDwfAnalogImpedance... functions which can be used for NA, see the example.

    Crosstalk depends on the setup. Leaving the high impedance oscilloscope inputs open, specially with wires attached will catch more noise and crosstalk.
    Use BNC cables or twist positive/negative inputs and signal wires with ground for better noise rejection and less crosstalk.

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  3. 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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  4. 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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  5. 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.

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