Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source How to source exponential waveform This material shows how to source exponential waveform using an example to source it to 1 kOhm resistor. Figure 1 illustrates the connection and condition supposed in the example to source exponential waveform using the B2961A/B2962A. B2961A/B2962A A V High Force DUT - Low Force Figure 1. Connection and condition supposed in the example Figure 2 shows the waveform parameters to source exponential waveform with the front panel operation. In this case, the specified source value is sourced immediately after turning on instrument will source exponential waveform. V or I . Then, when you press Tau Tau Tau tD : Delay t : Time End Start Source Value Output Off State tD Output ON tE tD tE tD tE Press Trigger Figure 2. Waveform parameters to source exponential waveform Time , the Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Sourcing finite exponential waveform Step 1. Press Step 2. Press source. repeatedly until Single View for Channel 1 is shown in the display. to edit the source function, and then select (1) Press Mode Step 3. Press Press (2) Enter Source Value to edit the limit value, and then enter 10 mA to set the limit value to 10 mA. (1) Press Limit Step 5. Press the current. (2) Press VOLTS (V) to edit the source value, and then enter 0.5 V to set the source value to 0.5 V. (1) Press Source Step 4. to set the source function to the voltage (2) Enter Limit Value to configure the monitor parameter, and then select (1) Press Measure (2) Press AMPS (I) to set the monitor parameter to Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 6. Press Preview. to change the keys shown in Assist keys, and then press (1) Press Show Preview Step 7. Rotate and press to show Waveform (2) Waveform Preview appears to edit the function. Then press repeatedly until is shown in Assist keys. (1) Rotate and press Function to edit (2) Press More … until ARB EXP. is shown in Assist keys Step 8. Press to turn on Exponential Waveform Output. After turning on Exponential Waveform Output, you can see Source Shape which shows the exponential waveform output. (1) Press ARB EXP. Source Shape Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 9. Rotate to select Channel 1 Waveform Parameters and set them up as below. (Start: 0.5 V, End: 2 V, Count: 5, Delay: 1 ms, τ(Tau): 2 ms, Time: 9 ms) Step 10. Press repeatedly until Graph View is shown in the display. Step 11. Press to source the voltage, and then press to source the waveform and monitor the signal. (The status information will show during sourcing the waveform.) Step 12. Press to adjust the scale of the graph after finishing waveform sourcing. Now you can see the monitored result on the GUI of the B2961A/B2962A as bellow. Result on GUI of B2961A/B2962A Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source If you’d like to confirm the output voltage waveform, take the following procedure. Step 13. Rotate and press to edit the Y-axis data type, and then select to set the Y-axis data type to the voltage. (1) Rotate and press Y-axis Data Type field to select (2) Press VOLTS (V) Now you can see the monitored output voltage waveform on the GUI of the B2961A/B2962A as bellow. Result on GUI of B2961A/B2962A Result on Oscilloscope Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Configuring Trigger Parameters In the default setting, the B2961A/B2962A will monitor only the first waveform even if you set up the instrument to source plural waveforms. However, if you modify Trigger Parameters properly, you can monitor the entire output on the B2961A/B2962A without any oscilloscope. For example, let’s try to change the parameters to capture the entire waveforms on Graph View of the B2961A/B2962A. Step 1. Press Step 2. Press Sub-Panel. repeatedly until Ch1 Single View is shown in the display. to change the keys shown in Assist keys, and then press (1) Press More... (if necessary) Step 3. Press Step 4. Rotate (2) Press Show Trigger to edit the trigger type, and then select (1) Press to set the trigger type to TIMER. (2) Press TIMER to select Channel 1 Trigger Parameters and set them up as below. (Measurement Trigger Count: 5000, Measurement Trigger Period: 10us) Step 5. Press to show Trigger repeatedly until Graph View is shown in the display. Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 6. Press to source the waveform and monitor the signal. (The status information will show during sourcing the waveform.) Step 7. Press to adjust the scale of the graph after finishing waveform sourcing. Now you can see the monitored result on the GUI of the B2961A/B2962A as bellow. Sourcing continuous exponential waveform If you’d like to source continuous waveform, take the following procedure. Step 1. Press repeatedly until Ch1 Single View is shown in the display. Step 2. If you don’t see Channel 1 Waveform Parameters, press Waveform Parameters. , Rotate and press (1) Rotate and press Count to edit Count and then press to select to show Channel 1 (2) Press Hide Options, Hide Pulse or Hide Trigger (1) Press More... (if necessary) Step 3. , or to set Count to INFINITY. (2) Press INF. Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 4. Press to source continuous waveform. Result on Oscilloscope Stopping sourcing continuous exponential waveform If you are sourcing continuous waveform, you need to take the following procedure to stop sourcing continuous waveform. Step 1. Step 2. If you aren’t on the top of the Function menu, press Press repeatedly to return to the top level. On the top level of the Function menu Any tree structure can’t be seen In the middle level of the Function menu Some tree structure can be seen , , , and then press continuous arbitrary waveform. (1) Press Trigger (2) Press Abort (3) Press Trans. (4) Press Ch 1 to stop sourcing the Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Sourcing exponential waveform without monitoring If you’d like to source waveform without monitoring, you need to take the following procedure instead of pressing to initiate only Transient (Source) Action. Step 1. Step 2. If you aren’t on the top of the Function menu, press Press repeatedly to return to the top level. On the top level of the Function menu Any tree structure can’t be seen In the middle level of the Function menu Some tree structure can be seen , , , and then press to start sourcing the continuous arbitrary waveform. (1) Press Trigger (2) Press Initiate (3) Press Trans. (4) Press Ch 1 Viewing the list of measurement results The measurement results including the measurement time stamp can be referred by the following steps. Step 1. If you aren’t on the top of the Function menu, press repeatedly to return to the top level. On the top level of the Function menu Any tree structure can’t be seen In the middle level of the Function menu Some tree structure can be seen Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 2. If you’d like to see the list of measurement results, press , then press to open Measure Result dialogue. (1) Press Result (2) Press Measure Step 3. Rotate and press (1) Rotate field Step 4. Press type. to select Data Type field. to select Data Type to select Data Type to change the keys shown in Assist keys, and then press (1) Press More … Step 5. (2) Press Rotate and press (1) Rotate and press Data field to select Time as the data (2) Press TIME (t) to select Data field. Then rotate to select to scroll the data list. (2) Rotate or press Assist key to scroll the list Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Sourcing exponential waveform when B2961A/B2962A receives an external trigger signal If you’d like to set up the instrument to source exponential waveform when B2961A/B2962A receives an external trigger signal, you need to take the following procedure to configure Trigger Parameters. Figure 3 shows the timing chart for sourcing exponential waveform when the instrument receives an external trigger signal. V or I tD t Tau Tau Tau : Delay : Time End Start Source Value Output Off State Output ON tD tD tE Initiate tD tE tE Time External Trigger Figure 3. Timing chart for sourcing exponential waveform Figure 4 shows the requirement to an external trigger signal to trigger the device action on the B2961A/B2962A. Both positive and negative logic are available. V V tW 5V tW 5V Time Positive Logic Time Negative Logic tW : Trigger Pulse Width > 10 µs Figure 4. Requirement to an external trigger signal Step 1. Rotate and press (1) Rotate and press Count to edit the function. Then enter 1 to set the count to 1. to select (2) Enter Count Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 2. Press to show Trigger Sub-Panel. (1) Press Show Trigger Step 3. Press to edit the trigger type, and then select (1) Press Step 4. (2) Trigger Sub-Panel appears Rotate to set the trigger type to MANUAL. (2) Press MANUAL to select the source trigger source and press (1) Rotate and press Step 5. Press source to EXT1. to edit it. to edit Source Trigger Source to change the keys shown in Assist keys, and then press (1) Press More… (2) Press EXT1 to set the source trigger Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 6. Step 7. If you aren’t on the top of the Function menu, press repeatedly to return to the top level. On the top level of the Function menu Any tree structure can’t be seen In the middle level of the Function menu Some tree structure can be seen Press , , , and then press to open DIO Configuration dialogue. (1) Press More… (2) Press I/O (3) Press DIO (4) Press Config Step 8. Press and select to specify the digital I/O pin number, the properties of which is configured. (1) Press Step 9. Rotate (2) Press Pin 1 to select the input/output function and press to edit it. Then press it to the trigger input. (1) Rotate and press to edit the input/output function (2) Press TRIGGER IN to set Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 10. Rotate to select the polarity and press to edit it. Then press to set it to positive polarity. (1) Rotate and press the polarity Step 11. Press to edit (2) Press POS. to make the modification effective. (1) Press OK to make the modification effective Step 12. Rotate to select the source trigger count and press to edit it. Then enter the number of trigger signals which will be sent to the instrument as the source trigger count. (1) Rotate and press Source Trigger Count Step 13. Or press aborted. to edit (2) Enter Source Trigger Count to set it to INFINITY if you’d like to continue to source exponential waveforms until it is (1) Press INF. It is required to abort the instrument to make it return to the idle state when you set the source trigger count to INFINITY. Agilent B2961A/B2962A 6.5 Digit Low Noise Power Source Step 8. Press to make the instrument be ready to receive an external trigger signal. (The status information will show during sourcing the waveform.) Now the instrument has been ready to receive an external trigger signal. Output Signal from a channel Trigger Input via Digital I/O Result on Oscilloscope If you’d like to make the instrument return to the idle state before finishing sourcing all waveforms, you need to take the following procedure. Step 9. If you aren’t on the top of the Function menu, press repeatedly to return to the top level. On the top level of the Function menu Any tree structure can’t be seen In the middle level of the Function menu Some tree structure can be seen Step 10. Press , , , and then press return to the idle state. (1) Press Trigger (2) Press Abort (3) Press Trans. (4) Press Ch 1 to make the instrument