Labjack T7 stream and trigger problem

Dear Labjack users,

I am using a labjack T7 with usb port and I am doing a stream acquisition on AIN0, AIN1, AIN13 and DIO0. The acquisition should look like this:

In red, AIN0, in green AIN1, in blue FIO0. AIN13 is shown on the bottom plot. (The second pannel just shows AIN1 as a function of AIN0)

Here is how it sometimes looks like:

Obviously, the trigger was not done properly: by defining

    #3 enables a rising or falling edge to trigger stream

    aValues = [2000, 3]

    ljm.eWriteNames(handle, len(aNames), aNames, aValues)

I would have expected to trigger only on rising edge. This is the case most of the time, but sometime it isn't... Am I doing something wrong?

Even worse! From time to time I get something like this. AIN13 seems to have the data of AIN0, FIO0 something that looks like AIN1...

Could you tell me if I am doing something wrong? Or is it a bug from the Labjack T7?

Best,

G.

PS: Here is my python code:

aScanListNames = ["AIN0","AIN1","AIN13"]

aScanListNames.append("FIO_STATE")

numAddresses = len(aScanListNames)

aScanList = ljm.namesToAddresses(numAddresses, aScanListNames)[0]

scanRate = 10000

scansPerRead = int(1.*scanRate)

ain=np.zeros((numAddresses,scansPerRead))

try:

    # Configure the analog inputs' negative channel, range, settling time and

    # resolution.

    # Note when streaming, negative channels and ranges can be configured for

    # individual analog inputs, but the stream has only one settling time and

    # resolution.

    aNames = ["AIN_ALL_NEGATIVE_CH", "AIN_ALL_RANGE", "STREAM_SETTLING_US",

              "STREAM_RESOLUTION_INDEX"]

    #AIN_ALL_RANGE=Valid values/ranges: 0.0=Default=> +/-10V, 10.0=> +/-10V, 1.0=> +/-1V, 0.1=> +/-0.1V, or 0.01=> +/-0.01V.

    aValues = [ljm.constants.GND, 10.0, 0, 0] #single-ended, +/-10V, 0 (default),

                                              #0 (default)

    ljm.eWriteNames(handle, len(aNames), aNames, aValues)

    aNames = ["DIO0_EF_ENABLE"]

    #1 Disable DIO0_EF

    aValues = [0]

    ljm.eWriteNames(handle, len(aNames), aNames, aValues)

    aNames = ["STREAM_TRIGGER_INDEX", "DIO0_EF_INDEX"]

    #2000 sets DIO0 / FIO0 as the stream trigger

    #0 Clear any previous DIO0_EF settings

    #3 enables a rising or falling edge to trigger stream

    aValues = [2000, 3]

    ljm.eWriteNames(handle, len(aNames), aNames, aValues)

    aNames = ["DIO0_EF_ENABLE"]

    #1 Enable DIO0_EF

    aValues = [1]

    ljm.eWriteNames(handle, len(aNames), aNames, aValues)

    # Configure and start stream

    scanRate = ljm.eStreamStart(handle, scansPerRead, numAddresses, aScanList, scanRate)

    i = 1

    while i <= MAX_REQUESTS:

        try:

            ret = ljm.eStreamRead(handle)

        except:

            print("oups...")

        data = ret[0]

        #deinterlace the data

        for j in range(numAddresses):

            ain[j,:]=data[j::numAddresses]   

        i += 1

    #print("Stop Stream")

    ljm.eStreamStop(handle)

except ljm.LJMError:

    ljme = sys.exc_info()[1]

    print(ljme)

except Exception:

    e = sys.exc_info()[1]

    print(e)