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Found 7 results

  1. I am looking to export large quantities of data Fromm the scope or other tools. Whenever I try to export data the maximum amount of points seems to be ~8192. Is there anyway that I can save or take more samples than this? At any frequency?
  2. Hi Attila I am now the proud owner 3 Digilent Analog discover devices . ( 2x AD2 & 1x ADP3250 ) I have posted many post on the forum you can just make search for SIB in the forum and you will find all my posts. I would like you help to get this standard driver set up and running using the Java script engine of Waveforms . Below is the script that I want to get working and also is a waveforms work bench file also . This is after all the real power of the waveforms work bench and Analog discovery and professional devices Best wishes Simon --------------------------------------------------- function UART_data_collect() { // ------------------------------------------------------------------------------------------------------------ // // The aim of this script is to collect data from a UART serial stream from a embedded microprocessor board // and process the data from serial stream and display the result on the scope display // // ------------------------------------------------------------------------------------------------------------ // // Status // // 1) Code executes without error // 2) Code does not receive data from the UART serial port // even through the same ports are used manually to recieve data // from MCU using the manual protocol window with the same settings. // Steps to add A) Serial stream Protocol handler B) Scope display script // // ------------------------------------------------------------------------------------------------------------ clear(); // clear Output log Protocol.run() Scope.run() if(!('Protocol' in this)) throw "Please open the Protocol instrument"; if(!('Scope' in this)) throw "Please open the Oscilloscope instrument"; Protocol.Mode.text = "UART"; // make sure UART tab is selected Protocol.UART.TX.value = 0; // Set up UART TX pin on Digilent AD2 :: DIO_0 Pin Protocol.UART.RX.value = 1; // Set up UART RX pin on Digilent AD2 :: DIO_1 Pin Protocol.UART.Bits.value=8; // Sets or gets the UART number of bits. Protocol.UART.Parity.text="None" ;// Sets or gets the parity setting: “None”, “Even”, “Odd”, “Mark (High)”, “Space (Low)”. Protocol.UART.Rate.value=234000; // Sets or gets the baud rate setting Protocol.config(); // apply configuration changes now Protocol.UART.Receiver(); // reset receiver - that is too start receiving data print(" UART Serial Bus initialised . Beware this is 3V3 Logic RS232 & Not True +/- 15V Rs232" + "\n\r" ); print(" UART TX line connect to AD2 DIO Port " + Protocol.UART.TX.value + "\n\r" ) ; print(" UART RX line connect to AD2 DIO Port " + Protocol.UART.RX.value + "\n\r" ) ; print("\n\r"+" UART initialisation complete " + "\n\r" ) ; Scope1.Time.Rate.value = 0.2; Scope1.single(); //Scope1.wait(); Scope1.Ref1.Clone(Scope1.Channel1); Scope1.Ref2.Clone(Scope1.Channel2); Scope1.Ref1.enable = true; Scope1.Ref2.enable = true; var rx = [] var rx_process = [] while(wait(0.2)) { // wait 0.2 sec and repeat while not stopped rx = rx.concat(Protocol.UART.ReceiveArray()) // append new words if(rx.shift()!=0x0A) { continue; } else { // read one of text ; rx_process=rx; rx=[]; Print( rx_process ); } // (rx.length>10) // if(rx.shift()==0xAA) continue; // if (rx[1] == 0xB5 && rx[2]== 0x11 && rx[7] == 0x09) // { // find the temperatures for displaying // // // print ("Temp 1: " + (rx[8]/2).toFixed(1) + " °C Temp 2: " + (rx[9]/2).toFixed(1) + " °C"); // // } // decimal data devided by 2 bring °Celsius // //Scope1.Ref1.data = } // // ref https://forum.digilentinc.com/topic/21308-ad2-protocol-uart-script-reading-vaillant-ebus/ // // https://forum.digilentinc.com/topic/21353-use-of-multiple-protocol-uart-ports-via-script-possible-at-different-times/ // // notes // ===== // // 1. On the AD and AD2 the digital IO pins use LVCMOS 3V3 standard. These are supplied at 3.3V and have 200 Ohm PTC and clamping diodes to GND and to 3.3V for protection. // It will drive the digital wires at 3.3V and connecting 5V signals directly, without series resistor, it will sink about 10mA through the PTC and 3v3 diode. // As for noise, make sure to have ground connection between the two devices. // // 2. The WF/Protocol/UART uses the Stop length option only for transmission, this is not relevant for reception. // // 3. The UART TX filed lets you type in characters, hexadecimal values are not supported here. // Special chars you can copy/paste from other place or send from file. } //************************************************************ // Main program block : Start //************************************************************ clear(); // clear display screen print(" Script Main body start " + "\n\r "); UART_PID_data_collect(); //************************************************************ //************************************************************ // Main program block : Stop End ADP3250_UART_DATA_TO_SCOPE.dwf3work
  3. The oscilloscope channel signals don't stay aligned with the cursors, grid, and reference waveforms when zoomed out. The image "zoomed_in.png" has a signal (yellow), a reference waveform created from that signal (green), and two cursors. The signal and reference waveform are perfectly overlapping as expected. This is at 1ms/div. When I zoom out one step to 2ms/div, the signal becomes misaligned with respect to the reference and the cursors. In the third image, "badly_aligned.png", I have a capture of a periodic signal. I zoomed in on two of the pulses and placed the cursors in the middle of the pulses. When I zoom out, the cursors no longer look like they match up with pulses. Also notice that the cursor on the right appears farther away from the pulse than does the cursor on the left. The misalignment seems to be more of an issue toward the end of the full capture than at the beginning. This is an issue with both 3.16.3 and beta_3.16.23. I'm using Ubuntu 20.04.
  4. Hi to everyone, I'm new here. While i was reading the AD2 specifications I noticed that Analog Input and Voltmeter have some differences in the accuracy: is there any technical explaination? Why the Analog input has a 0.5% more?
  5. Hi, Can anyone tell me if it is possible, from within the <Scope/Math channel/Custom scripting> environment to access instrument objects like Wavegen1, Logic1, Logger1, ... and their sub-objects? And if it's possible, how to do it? Thanks in advance for your help. Kind regards.
  6. Is it possible to decode scope data using one of the "protocols"? I often need to analyze scope data as inverted UART data (e.g an RS-232 async serial signal).
  7. renesas_an1560_making_noise_measurements_pgs_1-3.pdfI have a noise test setup that is measuring the en noise of jfets and is gaining it by 1000x to the AD2. What tools exist in the AD2 - likely either scope with FFT or the SA where I can get reported the rms voltage value over frequency and the number of samples taken for the RMS. I don't want pk-pk as it requires more work and samples to be meaningful to the analog circuit designer - me. Please provide a best practice method as I am struggling at this time. An alternate can be to move to another piece of test equipment if this isn't an intended feature of the AD2. Thanks, Tim agilent_nz_5989-9087EN.pdf
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