Keysight Technologies N2797A User Manual
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Keysight Technologies N2797A User Manual

Keysight Technologies N2797A User Manual

Extreme temperature single-ended active probe
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Keysight N2797A
Extreme Temperature
Single-Ended Active Probe
User's
Guide

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Summary of Contents for Keysight Technologies N2797A

  • Page 1 Keysight N2797A Extreme Temperature Single-Ended Active Probe User’s Guide...
  • Page 2 Notices Warranty © Keysight Technologies, Inc. 2013 - 2014 (June 1987) or DFAR 252.227-7015 (b)(2) (November 1995), as applicable in any tech- No part of this manual may be reproduced in The material contained in this document is nical data.

  • Page 3: Table Of Contents

    Calibrating the Probe on InfiniiVision Oscilloscopes / 30 Characteristics and Specifications / 31 Dimensions / 33 Performance Data Plots / 35 Performance Verification / 37 Test 1. DC Input Resistance / 39 Test 2. Bandwidth / 40 Performance Test Record / 46 Index N2797A User’s Guide...
  • Page 4 Contents N2797A User’s Guide...

  • Page 5: Using The Probe

    With a 2 meter cable and ability to operate in temperatures from –40°C to +85°C, the N2797A probe is ideal for environmental labs. The probe’s bandwidth is 1.5 GHz. The N2797A integrates many of the characteristics needed for today’s general-purpose, high-speed probing, especially in digital system design, component Ω...
  • Page 6 Before using the probe, refer to “Safety Information" CAUTION Handle the probe cable carefully to avoid damaging it through excessive bending or pulling. Avoid any CAUTION mechanical shocks to the probe in order to guarantee accurate performance and protection. N2797A User’s Guide...

  • Page 7: Probe Features

    1. Up to four probes can be connected to the oscilloscope. The table also lists the minimum required firmware version for the oscilloscope. The N2797A probe is designed for oscilloscopes with 1 MW AutoProbe-interface channel NOTE inputs. Is Your Oscilloscope Software Up-to-Date? Keysight periodically releases software updates to support your probe, fix known defects, and incorporate product enhancements.
  • Page 8 All of the supplied accessories can be used at the probe’s specified extreme temperature range of –40°C CAUTION to +85°C (–40°F to +185°F) except the flex nose clip and pico hook tips. These adapters have a slightly reduced temperature range of –20°C to +80°C (–4°F to +176°F). N2797A User’s Guide...
  • Page 9 Using the Probe Figure 2 Accessories Supplied With the Probe (Not to Scale) N2797A User’s Guide...
  • Page 10 “extreme temp”. Table 4 shows additional accessories that work with the probe, but are not provided with the probe. Notice that most of these accessories can not be used at extreme temperature range of the probe. N2797A User’s Guide...
  • Page 11 (10 cm), extreme temp –20°C to +85°C (–4°F to +185°F) Short Y-Lead Adapter with damping resistor 5061-7387 (5 cm), extreme temp Right Angle Ground (5 cm), extreme temp Same as probe 5061-7384 –40°C to +85°C (–40°F to +185°F) N2797A User’s Guide...
  • Page 12 Right Angle Ground (5 cm) 5061-7399 Ground Lead (6 cm) 0°C to 50°C 5061-7395 (32°F to 122°F) Ground Lead (12 cm) 5061-7396 Offset Ground 0°C to 50°C 5061-7394 (32°F to 122°F) N2787A 3D Probe Positioner Not Specified — — N2797A User’s Guide...
  • Page 13 In order to insert the probe tip completely into the housing, carefully press the probe tip against a hard surface. Figure 3 Tip and Grounding Connections N2797A User’s Guide...

  • Page 14: Using The Accessory Tips And Grounds

    16 1.0 GHz “Solderable Tip with Right-Angle Ground" on page 17 800 MHz “9 cm Y-Leads with 0.1” Headers" on page 18 800 MHz “Y-Lead with Flexible Nose Clips and 500 MHz Pico Hooks" on page 19 N2797A User’s Guide...
  • Page 15 Handle the probe with care to avoid injury, especially when it is fitted with the sharp rigid or spring tip. WARNING When inserting the tip, insert the end with the ridge into the probe head as shown in Figure Figure 4 Inserting the Rigid Tip N2797A User’s Guide...
  • Page 16 (0.295 inch) and the outer insulation of the socket is less than 2.54 mm. You can use it for 2.54 mm pitch (0.1 inch) terminals. The bandwidth with accessory is 1.0 GHz. Figure 5 Probe with Y-Leads Attached N2797A User’s Guide...
  • Page 17 Therefore, keep the right-angle ground lead as straight as possible for maximum measurement bandwidth. Loops and bends in the ground lead, as shown in this picture, can reduce the measurement band width. Figure 6 Placing the Probe Onto the Solderable Tip N2797A User’s Guide...
  • Page 18 0.025 inch square) diameter pins. The maximum insertion depth is 7.5 mm (0.295 inch) and the outer insulation of the socket is less than 2.54 mm. You can use it for 2.54 mm pitch (0.1 inch) terminals. Figure 7 Probe with Y-Leads Attached N2797A User’s Guide...
  • Page 19 The clips have an ambient operating temperature range of –20°C to +80°C (–4°F to +176°F). This is a CAUTION slightly reduced range compared to the probe. Figure 9 Probe with Flexible Nose Clips Attached N2797A User’s Guide...

  • Page 20: Dynamic Range And Offset Voltage Limitations

    You could then zoom in to see the detail at a higher resolution. Trying to measure a signal out of the dynamic range may result in a clipped or distorted waveform. Figure 10 Dynamic Range and Offset Limits N2797A User’s Guide...

  • Page 21: Functional Test

    Connect a grounding accessory to the probe and connect the ground to the ground terminal on the oscilloscope. Connect the probe tip to the oscilloscope’s probe compensation output. Enable autoscale on the oscilloscope. A square wave should now be displayed on the oscilloscope, if the probe is functioning properly. N2797A User’s Guide...

  • Page 22: Inspecting The Probe

    If the shipping container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as your Keysight Technologies Sales Office. Keep the shipping materials for the carrier’s inspection. The Keysight Technologies office will arrange for repair or replacement at Keysight Technologies’...

  • Page 23: Returning The Probe For Service

    If the probe is found to be defective we recommend sending it to an authorized service center for all repair and calibration needs. Perform the following steps before shipping the probe back to Keysight Technologies for service. Contact your nearest Keysight sales office for information on obtaining an RMA number and return address.

  • Page 24: Safety Information

    Make sure to comply with the vol tage versus frequency derating curve found in this manual. Keep Away From Live Circuits. Avoid open circuitry. Do not touch connections or components when WARNING power is present. N2797A User’s Guide...
  • Page 25 The probe cable is a sensitive part of the probe and, therefore, you should be careful not to damage it CAUTION through excessive bending or pulling. Avoid any mechanical shocks to this product in order to guarantee accurate performance and protection. N2797A User’s Guide...
  • Page 26 Using the Probe N2797A User’s Guide...

  • Page 27: Probe Calibration

    Keysight N2797A User’s Guide 2 Probe Calibration Calibrating the Probe on Infiniium Oscilloscopes Calibrating the Probe on InfiniiVision Oscilloscopes Always calibrate the probe before making any critical measurements. A probe calibration removes attenuation errors, offset errors, and timing delays that are introduced by the probe.

  • Page 28: Calibrating The Probe On Infiniium Oscilloscopes

    When performing the skew calibration, you will be instructed to use the PV fixture. Observe these points: • Connect the PV fixture’s input to the oscilloscope’s calibration output as shown in Figure 11 on page 29. Connect a 50 ohm terminator to the PV’s output. N2797A User’s Guide...
  • Page 29 Positioner to hold the probe in place. You can check that the probe leads are correctly connected by pressing the front panel NOTE autoscale button. A stable step should be shown on the screen. Pressing autoscale will close the Probe Calibration dialog box. N2797A User’s Guide...

  • Page 30: Calibrating The Probe On Infiniivision Oscilloscopes

    Probe Calibration Terminals on 3000 X-Series Oscilloscope Press the Channel on/off key to turn the channel on (if the channel is off). In the Channel Menu, press the Probe softkey. Press the Calibrate Probe softkey and follow the instructions on the display. N2797A User’s Guide...

  • Page 31: Characteristics And Specifications

    3 Characteristics and Specifications This chapter provides the characteristics and specifications for the N2797A active probe. 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.
  • Page 32 < 2.5 mV (referred to input) Ω Output Impedance Internal Power Keysight AutoProbe interface from oscilloscope (InfiniiVision and Infiniium) a Denotes warranted electrical specification at 25 °C room temperature after 20 minute warm-up. All others are typical. N2797A User’s Guide...

  • Page 33: Dimensions

    Directive Annex I, this product is classed as a "Monitoring and Control Instrumentation" product. Do not dispose in domestic household. To return unwanted products, contact your local Keysight office, or refer to www.keysight.com for more information. Dimensions N2797A User’s Guide...
  • Page 34 Characteristics and Specifications N2797A User’s Guide...

  • Page 35: Performance Data Plots

    Keysight N2797A User’s Guide 4 Performance Data Plots Figure 13 shows the frequency response for the spring or rigid probe tip and an offset ground or ground blade. Figure 13 Frequency Response (Vout/Vin)
  • Page 36 Performance Data Plots Figure 14 Input Impedance Equivalent Model Figure 15 Typical Input Impedance Plot N2797A User’s Guide...

  • Page 37: Performance Verification

    Test 1. DC Input Resistance Test 2. Bandwidth Performance Test Record These procedures are used to test the warranted specifications for the N2797A. The recommended calibration test interval is once a year or as required. Use the equipment listed in Table 9 on page 38.
  • Page 38 Outside thread 3.5 mm (male) to 3.5 mm No Substitute Keysight 5062-1247 (female) adapter Cable (2) 3.5 mil; SMA; High Quality Keysight 8120-4948 Cable 1.5 mil Probe Power Extension No Substitute Keysight 01143-61602 PV/DS Test Board No Substitute (In E2655B Kit) Keysight E2655-66503 N2797A User’s Guide...

  • Page 39: Test 1. Dc Input Resistance

    Connect the DMM probes between the probe tip and ground at the tip of the probe. Set up the DMM to measure resistance. The resistance should read 1 MW ± 3%. Record the resistance in Table 10 on page 46. N2797A User’s Guide...

  • Page 40: Test 2. Bandwidth

    Select the log freq screen key. Connect the probe under test to the AutoProbe Adapter and power the probe using the 1143A power supply as shown in Figure 16 on page 41. Install the outside thread adapter to the AutoProbe Adapter. N2797A User’s Guide...
  • Page 41 Connect the PV fixture to the Port 1 on the VNA using a high quality SMA cables. Connect the cable to the pincher side of PV fixture as shown in Figure 17 on page 42. The calibration reference plane is at the other end of PV fixture. N2797A User’s Guide...
  • Page 42 Wait until the VNA beeps indicating that it has completed the task. Press the done loads screen key. m You have just calibrated one side of the reference plane. Connect the other high quality SMA cable to the VNA’s PORT 2 as shown in Figure N2797A User’s Guide...
  • Page 43 Press the done loads screen key. m You have just calibrated the other side of the reference plane. Press standards done key. Connect the PORT 2 SMA cable to the non-pincher side of PV fixture as shown in Figure N2797A User’s Guide...
  • Page 44 Press the [scale reference] key. Then set the scale to 1 dB per division and the reference position for 7 divisions. Set reference value for 0 dB. Press the [measure] key. Press the s21 screen key. Ensure s21 response on screen is flat out to 1.5 GHz. N2797A User’s Guide...
  • Page 45 Read the marker frequency measurement and record it in Table 10 on page 46. The bandwidth test passes if the frequency measurement is greater than or equal to the probe's bandwidth limit, which is 1.5 GHz. N2797A User’s Guide...

  • Page 46: Performance Test Record

    Performance Test Record The recommended Test Interval: 1 year / 2000 hours. Table 10 Performance Test Record Probe Amplifier Test Limits Resul t Pass/Fail Ω Test 1. DC Input Resistance ± 3% ≥ Test 2. Bandwidth 1.5 GHz N2797A User’s Guide...
  • Page 47 Y-lead with clips, Y-leads, 16, ESD, performance test record, performance verification, flex nose clip, 10, probe functional test, cleaning, configurations, handling, inspecting, ground lead, service, probe accessories, probe calibration, Probe Calibration dialog box, headlight, probe positioner, probe, inspecting, N2797A User’s Guide...
  • Page 48 Index N2797A User’s Guide...

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