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attila

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Posts posted by attila

    ADP3450 not working out of the box

    in Test and Measurement

    Posted

    Hi @peter_a

    Please try a different cable, because such sudden errors are usually caused by contact problem, for example, loose connection, the plug is not fully inserted, slight difference is the socket dimensions, worn contacts in a way such the cable works with some devices but not with others...
    If it still doesn't work properly,     for warranty and replacement contact the support.digilent @ ni.com specifying the Date of Purchase, Seller and Purchase Order/ Web order Number. 

    ADP3450 Frequency response test?

    in Test and Measurement

    Posted

    Hi @TanTAH

    The Network Analyzer can use the AWG channels to generate sine wave sweep, but you can also select the 'external' option and use external stimulus signal or custom signal sweep from the same device Wavegen interface. For white noise you probably want to use the Spectrum interface or Scope/FFT view.

    Amplitude ratio in network analyser mode : relative to Ref + Vrms ?

    in Test and Measurement

    Posted

    Hi @Xavier

    Run the following script once to convert C2 from relative to absolute magnitude:
    (For the next software version I'll try to make the relative option dynamic) 

    var c1 = Network.Channel1.magnitude; // in selected Unit
var c2 = Network.Channel2.magnitude;
var a = Network.Wavegen.Amplitude.value/sqrt(2); // for VRMS
var n = c1.length;
for(var i = 0; i < n; i++) c2[i] = c2[i]*c1[i]/a;
Network.Channel2.magnitude = c2;

    image.png

    Is it possible to receive UART TX and RX separately with WaveForms script?

    in Test and Measurement

    Posted

    Hi @hrkzkb

    Your code seems to be good, TX and RX should be returned in rx[0] and rx[1]. and additional UARTs when enabled in rx[2,3]
    For printable text use Receives (string list) and for raw values use ReceiveArrays (2d numeric array)

    image.png

    image.png 

    Protocol.UART.Receiver();
if(1){
    while(wait(0.1)) {
        var rx = Protocol.UART.Receives(); // text
        var d = new Date();
        if (rx[0].length()) print("TX:"+d.toISOString()+":"+rx[0]);
        if (rx[1].length()) print("RX:"+d.toISOString()+":"+rx[1]);
    }
}else{
    while(wait(0.1)) {
        var rx = Protocol.UART.ReceiveArrays(); // numeric
        var d = new Date();
        if (rx[0].length()) print("TX:"+d.toISOString()+":"+rx[0]);
        if (rx[1].length()) print("RX:"+d.toISOString()+":"+rx[1]);
    }
}

     

    Power Supply with AD3's in Waveforms SDK

    in Test and Measurement

    Posted

    Hi @Maxpfeiff 

    ...

dwf.FDwfDeviceOpen(iDevice, byref(hdwf))

if hdwf.value == 0:
    dwf.FDwfGetLastErrorMsg(szerr)
    print(str(szerr.value))
    dwf.FDwfDeviceCloseAll()
    sys.exit(0)

rghdwf.append(hdwf.value)

dwf.FDwfDeviceAutoConfigureSet(hdwf, 0)  # the instruments will only be configured when FDwf###Configure is called

dwf.FDwfAnalogIOChannelNodeSet(hdwf, 0, 0, c_double(1))  # enable positive supply
dwf.FDwfAnalogIOChannelNodeSet(hdwf, 0, 1, c_double(5.0))  # set voltage to 5 V
dwf.FDwfAnalogIOChannelNodeSet(hdwf, 1, 0, c_double(1))  # enable negative supply
dwf.FDwfAnalogIOChannelNodeSet(hdwf, 1, 1, c_double(-5.0))  # set voltage to -5 V
dwf.FDwfAnalogIOEnableSet(hdwf, 1)  # master enable
dwf.FDwfAnalogIOConfigure(hdwf)  # apply

...

     

    state analyzer mode?

    in Test and Measurement

    Posted

    8bit format stores 8 DIOs or DINs, 16bit -> 16, 32bit -> 32, 64bit -> all 48 channels
    With FDwfDigitalInInputOrderSet 0 the samples bits represent: 8bit DIN[7:0], 16bit DIN[15:0], 32bit DIO[31:24]DIN[23:0], 64bit DIO[39:24]DIN[23:0]
    with 1: 8bit DIO[31:24], 16bit DIO[39:24], 32bit DIN[15:0]DIO[39:24], 64bit DIN[23:0]DIO[39:24]

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