Agilent Technologies N2792A User Manual
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Agilent Technologies N2792A User Manual

Agilent Technologies N2792A User Manual

Differential probes
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N2792A and N2793A
Differential Probes
User's Guide

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Summary of Contents for Agilent Technologies N2792A

  • Page 1 N2792A and N2793A Differential Probes User’s Guide...
  • Page 2 FAR 52.227-19 (June 1987) or any equivalent agency regulation or contract clause. Use, duplication or disclo- sure of Software is subject to Agilent Technologies’ standard commercial license terms, and non-DOD Departments and Agencies of the U.S. Government will receive no greater than Restricted Rights as defined in FAR 52.227-19(c)(1-2) (June...

  • Page 3: Table Of Contents

    Contents Introduction 4 Accessories 6 Using the N2792A Probe 9 Using N2793A Probe 11 Safety Information 15 Specifications and Characteristics 16 Performance Plots (N2792A Probe) 19 Performance Plots (N2793A Probe) 23 N2792A Performance Verification Procedures 27 N2793A Performance Verification Procedures 31...

  • Page 4: Introduction

    These differential probes have an input resistance of 1 MW (N2792A) and 200 kW (N2793A) and both feature low input capacitance to minimize circuit loading (7 pF for N2792A and 2 pF for N2793A). The N2792A and N2793A probes are compatible with any oscilloscope equipped with 50W BNC inputs.
  • Page 5 If the shipping container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as the Sales Office. Keep the shipping materials for the carrier’s inspection. The sales office will arrange for repair or replacement at Agilent Technologies’ option without waiting for claim settlement.

  • Page 6: Accessories

    Accessories N2792A Table 1 lists the accessories included with the N2792A probes. Replacements can be ordered with the N2792- 68700 replacement kit. The quantity of each accessory in the kit is the same as listed in the table and originally provided with the probe. The battery is not included in the kit.
  • Page 7 N2793A Table 2 lists the accessories included with the N2793A probes. Replacements can be ordered with the N2793- 68700 replacement kit. The quantity of each accessory in the kit is the same as listed in the table and originally provided with the probe. The battery is not included in the kit. Figure 3 N2793A Supplied Accessories...
  • Page 8 Table 2 N2793A Accessories Accessory Supplied Pincer Clip (red) Pincer Clip (black) Micro IC Clip (red) Micro IC Clip (black) Extension Lead, 0.8 mm J-P, 5 cm (red) Extension Lead, 0.8 mm J-P, 5 cm (black) Extension Lead, 0.8 mm J-P, 10 cm (red) Extension Lead, 0.8 mm J-P, 10 cm (black) Dual Signal Pin, 12.8 mm Dual Signal Pin, 16.8 mm...

  • Page 9: Using The N2792A Probe

    Using the N2792A Probe Before using the probe, you must either install the supplied 9V battery or plug in the supplied USB power cord. The USB power cord can be connected either to the USB port on a computer or the oscilloscope. To...
  • Page 10 When battery life has expired, remove the battery. Observe the WEEE label on the battery and dispose of properly. Hook and Alligator Clips Before you can use the N2792A probe, gently push the supplied hook clips or alligator clips onto the probe leads as shown in Figure 5.

  • Page 11: Using N2793A Probe

    Using N2793A Probe Before using the probe, you must either install the supplied 9V battery or plug in the supplied USB power cord. The USB power cord can be connected either to the USB port on a computer or the oscilloscope. To install the battery, slide open the battery compartment located on the back side of the probe housing.
  • Page 12 NOTE When battery life has expired, remove the battery. Observe the WEEE label on the battery and dispose of properly. Figure 7 Probe Tip Accessory Connection Options Single, Dual, and Variable Pitch Signal Pins Insert the single or dual signal pins into the probe tip as shown in Figure 8.
  • Page 13 Figure 8 Signal Pins Inserted into the Probe Tip Figure 9 Variable Pitch Pins Inserted into the Probe Tip Extension Leads If the length of the signal pins is not adequate for your measurement setup or if you need to use the pincer or micro IC clips, the extension leads can be placed over the pins as shown below.
  • Page 14 Micro IC Clips and Pincer Clips Use the micro IC and pincer clips to probe miniature IC and components. These clips attache to the end of the extension leads. Squeeze the lever on the micro IC clips to extend the grasping jaws. Push the back of the pincer clips to extend their connectors.

  • Page 15: Safety Information

    WARNING Observe Maximum Working Voltage. To avoid injury, do not use the N2792A probe above 60V between each input lead and earth or between the two input leads and do not use the N2793A probe above 40V between each input lead and earth or between the two input leads.

  • Page 16: Specifications And Characteristics

    Specifications and Characteristics The probe and oscilloscope should be warmed up for at least 20 minutes before any testing and the environmental conditions should not exceed the probe’s specified limits. NOTE Adhere to the specifications and characteristics listed in these tables to prevent damage to the probe and to keep the probe functioning properly.
  • Page 17 Table 4 Electrical Specifications and Characteristics Description N2792A N2793A Bandwidth (–3 dB) 200 MHz 800 MHz Attenuation Ratio 10:1 10:1 Probe Risetime (10% – 90%) 1.75 ns 437 ps Gain Accuracy (% of reading) \60V \40V Absolute Maximum Rated Input...
  • Page 18 Table 5 Mechanical Characteristics Description N2792A N2793A Approximate Weight (not including battery and 170g (6 oz) 170g (6 oz) accessories) BNC Cable Length 120 cm (47 inches) 120 cm (47 inches) Length of Input Leads 15 cm (5.9 inches) Housing Dimensions...

  • Page 19: Performance Plots (N2792A Probe)

    20 – 80% rise time: ..........2.2 ns Figure 12 N2792A Normalized Differential Step Response (50Ω)
  • Page 20 Figure 13 N2792A Frequency Response Figure 14 Frequency Response When Inputs Driven in Common Mode (CMRR)
  • Page 21 Figure 15 Input Impedance Equivalent Model With Measured Input Capacitance Values Figure 16 Typical Input Impedance Plot...
  • Page 22 Figure 17 Typical Derating Curve of Absolute Maximum Input Voltage (Either Input to Ground)

  • Page 23: Performance Plots (N2793A Probe)

    Performance Plots (N2793A Probe) Input Step Signal 10 – 90% rise time: ......... . . 900 ps 20 –...
  • Page 24 Figure 19 Frequency Response Figure 20 Frequency Response When Inputs Driven in Common Mode (CMRR)
  • Page 25 Figure 21 Input Impedance Equivalent Model With Measured Input Capacitance Values Figure 22 Typical Input Impedance Plot...
  • Page 26 Figure 23 Typical Derating Curve of Absolute Maximum Input Voltage (Either Input to Ground)

  • Page 27: N2792A Performance Verification Procedures

    N2792A Performance Verification Procedures The following procedure can be used to test the N2792A differential probe’s DC differential gain accuracy and bandwidth, which are warranted specifications. Table 8 Required Test Equipment Recommended Model Description Critical Specifications Part Number Functions Digitizing Oscilloscope Bandwidth: >200 MHz...
  • Page 28 Disable the 9500B’s output and disconnect the active head from channel 1 of the oscilloscope. Connect the N2792A probe output to channel 1 of the oscilloscope. Attach the BNC adapter to the 9500B’s CH1 active head. Attach the differential probe input leads by clipping the alligator clamp to the BNC adapter banana post.
  • Page 29 Enable the output of the calibrator. Record the DC amplitude of the square wave and divide 10 into just the amplitude of the oscilloscope. Verify that the probe gain accuracy is ±2% + scope gain accuracy. Record the test results as DC Differential Gain Accuracy in Table 9 on page Disable the 9500B’s output.
  • Page 30 N2792A Performance Verification Test Record The recommended test interval is 1 year. Table 9 N2792A Performance Test Record Certification Details Serial Number: Tested By: Certification Date: Recommended Date of Next Certificaton: Certification Temperature: Test Probe Setting Test Limits Test Results...

  • Page 31: N2793A Performance Verification Procedures

    N2793A Performance Verification Procedures The following procedure can be used to test the N2793A high- voltage differential probe’s DC differential gain accuracy and bandwidth, which are warranted specifications. Table 10 Required Test Equipment Recommended Model Description Critical Specifications Part Number Functions Digitizing Oscilloscope Bandwidth: >1 GHz...
  • Page 32 Procedure Configure the oscilloscope to the following settings: Amplitude Scale (Channel 1): ........20 mV/div Amplitude Scale (Channel 2): .
  • Page 33 Enable the output of the calibrator. Record the DC amplitude of the square wave and divide 10 into just the amplitude of the oscilloscope. Verify that the probe gain accuracy is ±2% + scope gain accuracy. Record the test results as DC Differential Gain Accuracy in Table 11 on page Disable the 9500B’s output.
  • Page 34 Configure the oscilloscope to the following settings: Amplitude Scale (Channel 1): ........50 mV/div Time Scale:.

  • Page 35: Dc Blocking Capacitor

    Index N2793A 25 accessories inspecting probe 5 N2792A 6 internal battery 4 N2793A 7 alligator clips 6, 10 attenuation ratio 4 mechanical characteristics 18 micro IC clips 14 battery compartment 9, 11 N2792A accessories 6 characteristics 16 performance plots 19...
  • Page 36 probe cleaning 5 probe handling 5 probe inspection 5 replacement kit 6, 7 safety information 15 safety specifications 16 single signal pins 12 USB power cord 9, 11 USB power input 9, 11 variable pitch pins 12...

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N2793a

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