RIGOL DG4000 (01) PDF MANUAL


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PDF Content Summary: RIGOL Calibration Guide DG4000 Series Function/Arbitrary Waveform Generator Jan. 2014 RIGOL Technologies, Inc. RIGOL Guaranty and Declaration Copyright © 2012 RIGOL Technologies, Inc. All Rights Reserved. Trademark Information RIGOL is a registered trademark of RIGOL Technologies, Inc. Publication Number CGB04102-1110 Notices ● RIGOL products are protected by patent law in and outside of P.R.C. ● RIGOL reserves the right to modify or change parts of or all the specifications and pricing policies at company’s sole decision. ● Information in this publication replaces all previously corresponding material. ● RIGOL shall not be liable for losses caused by either incidental or consequential in connection with the furnishing, use or performance of this manual as well as any information contained. ● Any part of this document is forbidden to be copied or photocopied or rearranged without prior written approval of RIGOL. Product Certification RIGOL guarantees this product conforms to the national and industrial standards in China as well as the ISO9001:2008 standard and the ISO14001:2004 standard. Other international standard conformance certification is in progress. Contact Us If you have any problem or requirement when using our products or this manual, please contact RIGOL. E-mail: service@rigol.com Website: http://www.rigol.com DG4000 Calibration Guide I RIGOL Contents Contents Guaranty and Declaration ........................................................................ I Chapter 1 Calibration Notices ............................................................ 1-1 Calibration Interval ................................................................................ 1-1 Calibration Safety................................................................................... 1-1 To Stop the Calibration ........................................................................... 1-1 To Acquire the Calibration Service ............................................................ 1-2 Recommended Test Devices .................................................................... 1-2 Test Notices .......................................................................................... 1-2 Chapter 2 Calibration Process ............................................................ 2-1 Frequency Accuracy Calibration ............................................................... 2-3 AC Amplitude Accuracy Calibration........................................................... 2-4 Low-frequency Flatness Calibration .......................................................... 2-5 DC Offset Accuracy Calibration ................................................................ 2-6 Output Impedance Calibration ................................................................. 2-7 High-frequency Flatness Calibration ......................................................... 2-9 Frequency Counter Calibration .............................................................. 2-10 II DG4000 Calibration Guide Chapter 1 Calibration Notices RIGOL Chapter 1 Calibration Notices Calibration Interval Regular calibration can ensure the performance specifications of DG4000. You are recommended to calibrate the instrument at a one-year calibration interval. You can choose a proper calibration interval according to your requirement of the performance accuracy but the calibration interval can not exceed 2 years (otherwise, the specifications can not be guaranteed). You are recommended to perform complete calibration at the calibration interval to ensure that the instrument will remain within specifications for the next calibration. Calibration Safety To perform calibration, you need to input the correct password. The password is used to prevent accidental or unauthorized calibration of the instrument. Press Utility → → Test/Cal → Secure Code, input the correct password using the knob and direction keys, press Secure and the calibration safety protection turns off. Press CaliSelf to enter the calibration interface. Press Preset to restore the calibration values to their default values. The calibration password is “2010”. The password is stored in the non-volatile memory and will not change at power-off or remote interface reset. To Stop the Calibration You can power off the instrument to stop the calibration at any time during the calibration. The calibration data stored will not be cleared when the calibration is stopped and you do not need to calibrate the items already calibrated again in the next calibration. CAUTION If the calibration is stopped when the instrument is writing the new calibration constants into the Flash, you may lose all the calibration constants and you need to perform the calibration again. DG4000 Calibration Guide 1-1 RIGOL Chapter 1 Calibration Notices To Acquire the Calibration Service RIGOL does not recommend manual calibration by users. If calibration is required, please contact RIGOL customer service department or the local distributor. Recommended Test Devices It is recommended that you use the test devices listed in the table below or other test devices with the same performance and specifications for calibration. Table 1-1 Recommended Test Devices Device Performance Requirement Recommended Digital Multimeter 61/2 RIGOL DM3068 Frequency Counter 1-2 DG4000 Calibration Guide >10 MHz Accuracy: 0.1 ppm Agilent 53131A Power Meter -30 dBm to +20 dBm Accuracy: ±0.02 dB Resolution: 0.01 dB Agilent E4416A Signal Generator Period: <40 ns, Accuracy: 1 ppm RIGOL DG5000 Cable BNC (m) – dual banana (m) -- Cable BNC (m) – BNC (m) -- Power Sensor -30 dBm to +20 dBm Agilent N8482A Power Sensor Cable Used to connect the power meter and power sensor -- 50 Ω Load 50 Ω/1 W -- Test Notices For optimum performance, all procedures should comply with the following recommendations. 1) Make sure the environment temperature is stable and between 18°C and 28°C. Ideally, the calibration should be performed at 23°C±1°C. 2) Make sure the environment relative humidity is less than 80%. 3) Allow a 30-minute warm-up period before the calibration. 4) Keep the test cables as short as possible, consistent with the impedance requirements. Chapter 2 Calibration Process RIGOL Chapter 2 Calibration Process Warm DG4000 up for at least 30 minutes. Press Utility → → Test/Cal → Secure Code, use the knob and direction keys to enter the correct password, press Secure and the calibration safety protection turns off. Press CaliSelf to enter the calibration interface as shown in the figure below. Figure 2-1 Calibration Interface 1. CalItem Press this softkey to select the desired calibration item. The calibration items of DG4000 manual calibration are listed in the table below. You can select one or more calibration items, but it is recommended to perform a complete calibration. Table 2-1 Calibration Items No. Item 1 AC (AC amplitude accuracy) 2 LFLAT (Low-frequency Flatness) 3 HFLAT (High-frequency Flatness) 4 FREQ (frequency accuracy) 5 LOAD (output impedance) 6 OFFSET (DC offset accuracy) 7 Frequency Counter 2. CalPoint Press this softkey and the cursor switches to the CalPoint column. At this point, you can rotate the knob to select the calibration point. Note: you can not select the calibration point in Output Impedance Calibration. DG4000 Calibration Guide 2-1 RIGOL Chapter 2 Calibration Process 3. MeasVal After selecting a calibration point, press this softkey and the MeasValue column of the corresponding point becomes editable. At this point, use the numeric keyboard or the knob and direction keys to input the measurement value. 4. EnterVal After selecting a calibration point and inputing the measurement value, press this softkey to finish the calibration of the point selected. 5. Save Press this softkey to save the current calibration value. The calibration method of each calibration item is introduced in detail in the following part. CAUTION You need to calibrate each item following the sequence below. 2-2 DG4000 Calibration Guide Chapter 2 Calibration Process RIGOL Frequency Accuracy Calibration 1. Make sure that DG4000 has been warmed up for 30 minutes. Connect the channel output terminal (take CH1 as an example; the calibration method is also applicable to CH2) of DG4000 with the signal input terminal of the frequency counter using the dual-BNC cable as shown in the figure below. DG4000 Series Frequency Counter Figure 2-2 Connect DG4000 and the Frequency Counter 2. Press Output1 at the front panel of DG4000 to enable the channel output. 3. Set the input impedance of the frequency counter to HighZ. 4. Enter the DG4000 calibration interface and press CalItem to select FREQ. 5. According to the prompt messages in the calibration interface, press Start to start the frequency accuracy calibration. 6. Observe the measurement value of the frequency counter. If the current measurement value is lower than 10 MHz, press Up to increase the output frequency of DG4000; and if the current measurement value is greater than 10 MHz, press Down to reduce the output frequency of DG4000 until the absolute value of the difference between the measurement value of the frequency counter and 10 MHz is lower than 1 Hz. 7. Press Save and the frequency accuracy calibration finishes. DG4000 Calibration Guide 2-3 ◎ RIGOL Chapter 2 Calibration Process AC Amplitude Accuracy Calibration 1. Make sure that DG4000 has been warmed up for 30 minutes. Connect the channel ouput terminal (take CH1 as an example; the calibration method is also applicable to CH2) of DG4000 with the voltage input terminals of the digital multimeter using the BNC - dual banana cable as shown in the figure below. DG4000 Series DMM ◎ ◎ ◎ ◎ Figure 2-3 Connect DG4000 and the Digital Multimeter 2. Press Output1 at the front panel of DG4000 to enable the channel output. 3. Turn on the digital multimeter. Select the AC voltage (ACV) measurement function and set the range to “Auto”. 4. Enter the DG4000 calibration interface and press CalItem to select AC (the default setting). 5. Press CalPoint and the cursor switches to the first calibration point in the CalPoint column. 6. Press MeasVal and the MeasValue column of the point selected becomes editable. At this point, use the numeric keyboard or the knob and direction keys to input the current measurement value of the digital multimeter. 7. Press EnterVal to finish the calibration of the point currently selected. The cursor switches to the CalPoint column. 8. Select the next calibration point using the knob. Repeat step 6 and 7 until all the calibration points are calibrated. 9. Press Save and the AC amplitude accuracy calibration finishes. 2-4 DG4000 Calibration Guide Chapter 2 Calibration Process RIGOL Low-frequency Flatness Calibration 1. Make sure that DG4000 has been warmed up for 30 minutes. Connect the channel output terminal (take CH1 as an example; the calibration method is also applicable to CH2) of DG4000 with the voltage input terminals of the digital multimeter using the BNC - dual banana cable as shown in Figure 2-3. 2. Press Output1 at the front panel of DG4000 to enable the channel output. 3. Turn on the digital multimeter. Select the AC voltage (ACV) measurement function and set the range to “Auto”. 4. Enter the DG4000 calibration interface and press CalItem to select LFLAT. 5. Press CalPoint and the cursor switches to the first point in the CalPoint column. 6. Press MeasVal and the MeasValue column of the point selected becomes editable. At this point, use the numeric keyboard or the knob and direction keys to input the current measurement value of the digital multimeter. 7. Press EnterVal to finish the calibration of the current point. The cursor switches to the CalPoint column. 8. Select the next calibration point using the knob. Repeat step 6 and 7 until all the calibration points are calibrated. 9. Press Save and the low-frequency flatness calibration finishes. DG4000 Calibration Guide 2-5 RIGOL Chapter 2 Calibration Process DC Offset Accuracy Calibration 1. Make sure that DG4000 has been warmed up for 30 minutes. Connect the channel output terminal (take CH1 as an example; the calibration method is also applicable to CH2) of DG4000 with the voltage input terminals of the digital multimeter using the BNC - dual banana cable as shown in Figure 2-3. 2. Press Output1 at the front panel of DG4000 to enable the channel output. 3. Turn on the digital multimeter. Select the DC voltage (DCV) measurement function and set the range to “Auto”. 4. Enter the DG4000 calibration interface and press CalItem to select OFFSET. 5. Press CalPoint and the cursor switches to the first point in the CalPoint column. 6. Press MeasVal and the MeasValue column of the point selected becomes editable. At this point, use the numeric keyboard or the knob and direction keys to input the current measurement value of the digital multimeter. 7. Press EnterVal to finish the calibration of the point currently selected. The cursor switches to the CalPoint column. 8. Select the next calibration point using the knob. Repeat step 6 and 7 until all the calibration points are calibrated. 9. Press Save and the DC offset accuracy calibration finishes. 2-6 DG4000 Calibration Guide Chapter 2 Calibration Process RIGOL Output Impedance Calibration 1. Make sure that DG4000 has been warmed up for 30 minutes. Connect the 50Ω load to the channel output terminal (take CH1 as an example; the calibration method is also applicable to CH2) of DG4000; connect the 50Ω load and the voltage input terminals of the digital multimeter using the BNC - dual banana cable as shown in the figure below. DG4000 Series DMM ◎ ◎ ◎ ◎ 50Ω Load Figure 2-4 Connect DG4000 and the Digital Multimeter via the 50Ω Load 2. Press Output1 at the front panel of DG4000 to enable the channel output. 3. Turn on the digital multimeter. Selet the AC voltage (ACV) measurement function and set the range to “Auto”. 4. Enter the DG4000 calibration interface and press CalItem to select LOAD. 5. Press CalPoint and the cursor switches to the first point in the CalPoint column. 6. You need to calibrate each calibration point twice (otherwise, you can not select the next calibration point). a) Calibration with the 50 Ω load: Press MeasVal and the MeasValue column of the point selected becomes editable. At this point, use the numeric keyboard or the knob and direction keys to input the current measurement value of the digital multimeter. Press EnterVal and the prompt message telling you to remove the 50 Ω load is displayed. The cursor switches to the CalPoint column. b) Calibration without the 50 Ω load: Remove the 50 Ω load and connect the digital multimeter and the channel output terminal of DG4000 directly (the connection method is as shown in Figure 2-3). Press MeasVal and the MeasValue column of the point selected becomes editable. At this point, use the numeric keyboard or the knob and direction keys to input the current measurement value of the digital multimeter. Press EnterVal and the prompt message telling you to DG4000 Calibration Guide 2-7 RIGOL Chapter 2 Calibration Process connect the 50 Ω load is displayed. The cursor switches to the CalPoint column. At this point, please connect the 50 Ω load (the connection method is as shown in Figure 2-4). 7. Select the next calibration point using the knob. Repeat step 6 until all the calibration points are calibrated. 8. Press Save and the output impedance calibration finishes. 2-8 DG4000 Calibration Guide Chapter 2 Calibration Process RIGOL High-frequency Flatness Calibration 1. Make sure that DG4000 has been warmed up for 30 minutes. Connect the power meter and the power sensor; connect the power sensor with the channel output terminal (take CH1 as an example; the calibration method is also applicable to CH2) of DG4000 as shown in the figure below. DG4000 Series Power Meter ◎ Power Sensor Figure 2-5 Connect DG4000 and the Power Meter 2. Press Output1 at the front panel of DG4000 to enable the channel output. 3. Enter the DG4000 calibration interface and press CalItem to select HFLAT. 4. Press CalPoint and the cursor switches to the first point in the CalPoint column. 5. The frequency of the first calibration point is 100 kHz. Set an appropriate frequency calibration factor for the power meter according to the ratio of the power sensor. 6. Press MeasVal and the MeasValue column of the point selected becomes editable. At this point, use the numeric keyboard or the knob and direction keys to input the current measurement value of the power meter. 7. Press EnterVal to finish the calibration of the point currently selected. The cursor switches to the CalPoint column. 8. Select the next calibration point using the knob. Repeat step 5 to step 7 (for each calibration point, set an appropriate frequency calibration factor for the power meter) until all the calibration points are calibrated. 9. Press Save and the high-frequency flatness calibration finishes. DG4000 Calibration Guide 2-9 RIGOL Chapter 2 Calibration Process Frequency Counter Calibration 1. Make sure that DG4000 has been warmed up for 30 minutes. 2. Connect the output terminal of the signal generator with the [Counter] connector at the rear panel of DG4000 using the dual-BNC cable as shown in the figure below. DG4000 Series Signal Generator ◎ Figure 2-6 Connect DG4000 and the Signal Generator 3. Power on and start the signal generator. Configure the signal generator to output a 40 ns, 5 Vpp sine waveform. 4. Enter the DG4000 calibration interface and press CalItem to select Counter. 5. According to the prompt messages in the calibration interface, press Start; the frequency counter of DG4000 turns on automatically (the status indicator at the left of Counter is illuminated but the user interface does not switch to the frequency counter interface) and the frequency resolution calibration of the frequency counter starts. 6. After the calibration finishes, the prompt message telling you that the calibration finishes is displayed. 7. Press Save and the frequency resolution calibration of the frequency counter finishes. After the frequency resolution calibration of the frequency counter finishes, you can press to return to the calibration interface or press Utility to exit the calibration. By now, the calibration process finishes. 2-10 DG4000 Calibration Guide


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