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m72

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Posts posted by m72

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello!

    WaveForms 3.22.15, AD2 & AD3

    Buffer accumulation in the oscilloscope does not work.
    Immediately after selecting an oscilloscope, the buffers are filled to the specified amount as provided. After each change of scale, movement of a curve, etc. the number of the scanned buffer is reset.

    After this sequence, the capture of several buffers stops. The counter shows a maximum of 1-2-3 buffers.
    1. View digital
    2. Digitizer: analog only.
    3. Add: UART Sс С1 with default parameters.
    4. Connect valid source of UART signal to channel 1.
    After this, you can do whatever you want, but the number of captured buffers will be constantly reset. You can close Digital view or so on.

    But if you remove the UART from the list of decoders everything works as it should again. Another strange thing is that this seems to happen only with UART decoder when valid sequence occurs. If the UART signal is always zero, the buffers are counted correctly.

    With best regards, Mikhail.

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello!

    When you turn off any channel of the oscilloscope, the list of digital channels is deformed (dramatic collapse).
    Please also check other modes. If a channel is not available (analog in "digital only" or digital in "analog only"), it is not marked as unavailable, but is replaced by another.

    Regards, Mikhail.

    digitizer.png

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello!

    WaveForms 03.21.19, Digital Discovery

    Something is wrong with PLL. In patterns I set the pulse "low 30k", "high 10k", "divisor 1".
    At 100 MHz it works normally, the pulse duration is 100 μs, the period is 400 μs.
    At 50 MHz, the width is 333 μs, the period is 1333 μs.
    This also affects measurements in the logic analyzer.

    WF 3.20.26 - works fine.

    With best regards, Mikhail.

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello!

    WaveForms 3.21.19, AD3
    Tool: oscilloscope

    When I select "record" and "analog only", the analog and digital channel graphs do not match each other. The trigger positions match, but the start and end do not.
    In the recording parameters, the trigger is equal to 10%.
    With “digital only” and “digital and analog” modes everything is correct.

    With best regards, Mikhail.

     

    record1.png

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted

    Hello!

    WaveForms 3.21.18, AD3

    "Digital input options: digital, analog only or both".

    When I select "analog only", the digital sub-window submenu (digital samples and frequency) disappears from the Options menu in the right toolbar.

    On the one hand, there is logic in this. The sampling rate and sample count can be the same as for the analog part (64k samples for a digitized single signal, like 1-wire, that's interesting). But there is no menu or correspondence to real analog parameters. It seems to me that the transfer of these parameters from the analog part to the digital part has been lost.

    With best regards, Mikhail.

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello!

    WaveForms 3.21.18, AD3

    Tools: oscilloscope and AWG.

    When I set the offset of channel C1 (so that I can see it higher on the screen), the signal that pass the C1 filter and in the AWG is also shifted up by this value.
    Those. I raised channel C1 by 1 volt up on the screen and the signal that comes out from the AWG (basic, source C1, amplitude 100%, offset 0.0) rose by 1 volt. I watch the AWG signal on another device.

    Is this right?

    With best regards, Mikhail.

    P.S.
    I want to install a radiator on Spartan-7. I think 70-75°C is too hot. Please tell me the distance between the screws on the case. I think it's about 65-70mm. 
    P.P.S.
    Done. The holes are located at the corners of a 71.12mm (2.8") square. I used CNC to remove pads with a diameter of 6 mm to a depth of 0.5 mm and gained access to the screws without peeling off the label. If you use a cutter with a diameter of 1 mm, you can cut to a depth of 1 mm.

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello!

    WaveForms version 3.19.35. Windows 10 x64.

    1. Can not select dual AD2 when one AD2 is green and second AD2 is  blue (NI edition). With two green AD2 works well.

    2. In status bar names of AD shown correctly. But serial numbers in are identical (one of this is doubled).

    With best regard, Mikhail.
    P.S.
    It is a pity that no overclock selection 125 MHz for 1Gs/s on Digital Discovery.

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello!

    WaveForms crashes. Version 3.19.29. Windows 7 x64.

    1. Start WaveForms
    2. Choose any DEMO Discovery (I found this with DDiscovery).
    3. Open Protocol tab
    4. Choose SWD
    5. Select Master tab
    6. Execute it one time
    7. Choose CEC

    There is no crashes with connected Digital Discovery (not demo).

    With best regards, Mikhail.
    P.S.
    Please do not ask me how I found this. :-)

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted

    Hello! 

    I try to use AD2 and DD via USB isolator 480Mbit/s. As power source for Discoveries I use RECOM RS6-0505S, 6 W, 5 V, 1.2 A. DD works well but AD2 sometimes can not start with PLL errors. 
    I have check power consumption (yellow line) with 0.1 Ohm resistor (10 X) as current shunt and see that at AD2 programming takes up to 1 A. There is no such inrush current when DD starts. With external power inrush current for AD2 is about 0.5 A and there is no problems at all.

    With best regards, Mikhail.

    PLLfailed1.png

    PLLfailed2.png

    PLLfailed3.png

    AD2programming.png

    AD2programmingext.png

    DDprogramming.png

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted · Edited by m72

    Hello! 

    WF 3.18.52, Windows 7 x64, Digital Discovery

    Issue with custom pattern when it repeats counted times.

    First element of pattern is shorter by 20 ns than needed.

    There is a glitch of 10 ns at the end of the last element when value of the first element is different than idle.

    It does not depend of pattern clock frequency.

    With best regards, Mikhail.
     

    glitch3.png

    glitch4.png

    Logic Detector as trigger in Scope. Is it possible?

    in Test and Measurement

    Posted

    Hello!

    WF 3.16.35, Windows 7 x64, Digital Discovery (Demo)

    1. When I press "Start I2C from here" to the right of the marker I2C decoder works fine. When to the left of the marker the decoder skips first packet "27WR|09". First data samples are erroneous: SCL = 0, SDA = 1.
    2. I am not GUI designer. But I propose to set "green markers" for "set first"/"set last" which will be keeping in any time scale. This will be good for delicate cutting of long sequences. I.e. when it is need to cut +/-one bit on the 1kb base.

    With best regards, Mikhail.

    test01.png

    test01.dwf3work

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