Keysight N2795/6A User Manual
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Keysight N2795/6A User Manual

Keysight N2795/6A User Manual

Single-ended probes
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Keysight N2795/6A
Single-Ended Probes
User's Guide

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Summary of Contents for Keysight N2795/6A

  • Page 1 Keysight N2795/6A Single-Ended Probes User’s Guide...
  • Page 2 Should Keysight and the user have a modify, reproduce, release, perform, display, separate written agreement with warranty or disclose commercial computer software or...

  • Page 3: Table Of Contents

    Returning the Probe for Service / 22 Safety Information / 23 Characteristics and Specifications Dimensions / 27 Performance Data Plots Performance Verification Test 1. DC Input Resistance / 35 Test 2. Bandwidth / 36 Performance Test Record / 45 N2795/6A User’s Guide...
  • Page 4 Contents N2795/6A User’s Guide...

  • Page 5: Using The Probes

    N2796A, ±8V for N2795A), these probes can be used in a wide variety of applications. For high signal integrity probing, the N2795A 1 GHz and N2796A 2 GHz active probes are perfect complements to Keysight’s 500 MHz – 600 MHz and 1 GHz bandwidth oscilloscopes, respectively. The...
  • Page 6 Using the Probes N2796A 2 GHz probe can also be used with Keysight’s 2.5 GHz or higher bandwidth Infiniium scope as a low cost alternative to the InfiniiMax probes. The N2795/6A probes are powered directly by the InfiniiVision and Infiniium AutoProbe interface, eliminating the need for an additional power supply.

  • Page 7: Oscilloscope Compatibility

    Using the Probes Oscilloscope Compatibility The N2795/6A probes are compatible with the Keysight oscilloscopes shown in Table 1 (those with the Keysight AutoProbe Interface). The table also lists the minimum required firmware version for the oscilloscope. Table 1 Compatible Oscilloscopes and Probe Support...

  • Page 8: Supplied Accessories

    In order to insert the probe tip completely into the housing, carefully press the probe tip against a hard surface. Figure 1 Tip and Grounding Connections N2795/6A User’s Guide...
  • Page 9 Flex Nose Clip (red) Right-Angle Ground (10 cm) Flex Nose Clip (black) Ground Blade Rigid Probe Tip Offset Ground Spring Probe Tip Flex Ground Y-Lead Adapter (10 cm) Copper Pads Right-Angle Ground (5 cm) Channel-Identification Rings 4 of each color N2795/6A User’s Guide...
  • Page 10 On the probe, place one colored ring near the probe’s channel connector and place an identical color ring near the probe head. N2795/6A User’s Guide...

  • Page 11: Probe Headlight

    The probe is equipped with a white LED headlight to illuminate the area around the probe tip. This headlight has a fixed intensity and is turned on and off by pressing the button that is located on the probe’s body. Figure 3 Headlight and Button N2795/6A User’s Guide...

  • Page 12: Using The Accessory Tips And Grounds

    1.8 GHz (N2796A) “Y-Leads Adapter with 0.1” Headers” on page 16 750 MHz (N2795A) 1 GHz (N2796A) “Flexible Nose Clips” on page 17 500 MHz (N2795A) 500 MHz (N2796A) “Ground Leads and Right-Angle Ground Leads” Unspecified page 18 N2795/6A User’s Guide...
  • Page 13 The recommended grounding accessory for the rigid probe tip is the offset ground. Figure 4 Sprint and Rigid Tips with Offset and Blade Ground N2795/6A User’s Guide...
  • Page 14 Handle the probe with care to avoid injury, especially when it is fitted with the sharp rigid or spring tip. When inserting the tip, insert the end with the ridge into the probe head as shown in Figure Figure 5 Inserting the Tips and Grounds N2795/6A User’s Guide...
  • Page 15 NOTE The bandwidth is highly dependent on the number of ground connections between the copper pad and the device under test. Figure 6 Copper Pad on IC N2795/6A User’s Guide...
  • Page 16 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 N2795/6A User’s Guide...
  • Page 17 Y-lead adapter as shown in the picture below. Press the back of the flex nose clip to extend the grasping hook and then release to tighten the hook around the component you are testing. Figure 8 Probe with Flexible Nose Clips Attached N2795/6A User’s Guide...
  • Page 18 The straight leads are not included with the probe. They must be ordered as a replacement kit. For more information about the replacement kits, refer to Table 3 on page 10. Figure 9 Straight and Right-Angle Ground Leads N2795/6A User’s Guide...

  • Page 19: 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 N2795/6A User’s Guide...

  • Page 20: Functional Test

    3 Connect the probe tip to the oscilloscope’s probe compensation output. 4 Enable autoscale on the oscilloscope. 5 A square wave should now be displayed on the oscilloscope, if the probe is functioning properly. N2795/6A User’s Guide...

  • Page 21: Inspecting The Probe

    • Check the accessories. • If the contents are incomplete or damaged, notify your Keysight Technologies Sales Office. • Inspect the probe. If there is mechanical damage or defect, or if the probe does not operate properly or pass calibration tests, notify your Keysight Technologies Sales Office.

  • Page 22: Returning The Probe For Service

    Perform the following steps before shipping the probe back to Keysight Technologies for service. 1 Contact your nearest Keysight sales office for information on obtaining an RMA number and return address. 2 Write the following information on a tag and attach it to the malfunctioning equipment.

  • Page 23: Safety Information

    WARNING Observe Probe Ratings. Do not apply any electrical potential to the probe input which exceeds the maximum rating of the probe. Make sure to comply with the voltage versus frequency derating curve found in this manual. N2795/6A User’s Guide...
  • Page 24 WARNING To avoid dangerous electric shock, do not attempt to perform any service to the probe. Service should be carried out by a Keysight Technologies authorized service personnel. For any service needs, contact Keysight Technologies. Refer to the topic “Returning the Probe for Service”...
  • Page 25 WEEE 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. This symbol indicates the Environmental Protection Use Period (EPUP) for the product’s toxic substances for the...
  • Page 26 Earth terminal symbol: Used to indicate a circuit common connected to grounded chassis. Hazardous voltage symbol. N2795/6A User’s Guide...

  • Page 27: Characteristics And Specifications

    2 Characteristics and Specifications This chapter provides the characteristics and specifications for the N2795/6A probes. 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 28 < 2.5 mV < 2.5 mV Output Impedance 50Ω 50Ω Internal Power Keysight AutoProbe Interface from scope (InfiniiVision and Infiniium models) a Denotes warranted electrical specification after 20 minute warm-up. All others are typical. b N2796A only Table 7 Mechanical Characteristics...

  • Page 29: Dimensions

    Characteristics and Specifications Dimensions N2795/6A User’s Guide...
  • Page 30 Characteristics and Specifications N2795/6A User’s Guide...

  • Page 31: Performance Data Plots

    Keysight N2795/6A Single-Ended Probes User’s Guide 3 Performance Data Plots Figure 11 Frequency Response of N2796A (Vout/Vin) NOTE Figure 11 is for the spring/rigid probe tip and an offset ground or ground blade.

  • Page 32: 3 Performance Data Plots

    Performance Data Plots Figure 12 Input Impedance Over Frequency (Red = measured, Blue = model) N2795/6A User’s Guide...
  • Page 33 Performance Data Plots Figure 13 Input Impedance Equivalent Model Figure 14 Typical Input Impedance Plot N2795/6A User’s Guide...

  • Page 34: 3 Performance Data Plots

    Performance Data Plots N2795/6A User’s Guide...

  • Page 35: Performance Verification

    Test 1. DC Input Resistance Test 2. Bandwidth Performance Test Record These procedures are used to test the warranted specifications for the N2795/6A single-ended active probes. The recommended calibration test interval is once a year or as required. Use the equipment listed in. CAUTION Electrostatic discharge (ESD) can quickly and imperceptibly damage or destroy high performance probes, resulting in costly repairs.
  • Page 36 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 N2795/6A User’s Guide...
  • Page 37 1 Connect the DMM probes between the probe tip and ground at the tip of the probe. 2 Set up the DMM to measure resistance. The resistance should read 1 MW + 0%, –2.5%. 3 Record the resistance in Table 9 on page 47. N2795/6A User’s Guide...

  • Page 38: Test 2. Bandwidth

    Select the log freq screen key. 6 Connect the probe under test to the Auto Probe Adapter and power the probe using the 1143A power supply. Install the outside thread adapter to the Auto Probe Adapter. N2795/6A User’s Guide...
  • Page 39 To get a reliable measurement from the VNA you must calibrate a reference plane so that the VNA knows where the probe under test is located along the transmission line. 7 On the VNA, press the [Cal] key. N2795/6A User’s Guide...
  • Page 40 9 Press the full 2 port screen key. 10 Connect one of the high quality SMA cables to port one and to the pincher side of PV/DS test board. 11 The calibration reference plane is at the other end of PV/DS test board. N2795/6A User’s Guide...
  • Page 41 Wait until the VNA beeps indicating that it has completed the task. l Press the done loads screen key. m You have just calibrated one side of the reference plane. 13 Connect the other high quality SMA cable to the VNA’s PORT 2. N2795/6A User’s Guide...
  • Page 42 Performance Verification Figure 17 SMA Cable Connected to Port 2 14 Get the opposite sex of the Calibration Standards for the next step. N2795/6A User’s Guide...
  • Page 43 Press the done loads screen key. m You have just calibrated the other side of the reference plane. 16 Press standards done key. 17 Connect port two SMA cable to the non-pincher side of PV/DS test board. N2795/6A User’s Guide...
  • Page 44 27 Press the [scale reference] key. Then set the scale to 1 dB per division and the reference position for 7 divisions. 28 Set reference value for 0 dB. 29 Press the [measure] key. 30 Press the s21 screen key. N2795/6A User’s Guide...
  • Page 45 Reference Value, located under the Scale Ref key, slightly to position the waveform at center screen. 46 Press marker key and position the marker to the first point that the signal is –3 dB below center screen. N2795/6A User’s Guide...
  • Page 46 N2796A bandwidth:........2 GHz N2795/6A User’s Guide...

  • Page 47: Performance Test Record

    Recommended next test date: Recommended Test Interval: 1 year / 2000 hours Probe Amplifier Test Limits Result Pass/Fail Test 1. DC Input Resistance 1 MΩ + 0%, –2.5% Test 2. Bandwidth ≥ 1 GHz (N2795A) ≥ 2 GHz (N2796A) N2795/6A User’s Guide...
  • Page 48 Performance Verification N2795/6A User’s Guide...
  • Page 49 Y-lead with clips, output impedance, Y-leads, 15, flex ground, flex nose clip, 9, performance test record, flexible nose clips, performance verification, frequency response, probe functional test, cleaning, configurations, dimensions, handling, ground blade, 9, inspecting, ground leads, service, probe accessories, N2795/6A User’s Guide...
  • Page 50 Index N2795/6A User’s Guide...

Table of Contents