Tektronix P6249 Instruction Manual
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Tektronix P6249 Instruction Manual

Tektronix P6249 Instruction Manual

4 ghz 5x active probe
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Instruction Manual
P6249
4 GHz 5X Active Probe
071-0538-05
www.tektronix.com

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  • Page 1 Instruction Manual P6249 4 GHz 5X Active Probe 071-0538-05 www.tektronix.com...
  • Page 2 Copyright © Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
  • Page 3 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

  • Page 5: Table Of Contents

    ....... . . P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 6 ......Using the Replaceable Parts List ......P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 7 ....Figure 24: P6249 optional accessories ....P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 8 Table of Contents P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 9: General Safety Summary

    Do Not Operate With Suspected Failures. If you suspect there is damage to this product, have it inspected by qualified service personnel. Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 10 WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product. These symbols may appear on the product: CAUTION Refer to Manual P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 11: Service Safety Summary

    Service Safety Summary and the General Safety Summary before performing any service procedures. Do Not Service Alone. Do not perform internal service or adjustments of this product unless another person capable of rendering first aid and resuscitation is present. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 12: Contacting Tektronix

    This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices. P6249 4 GHz 5X Active Probe Instruction Manual viii...

  • Page 13: Product Description

    Product Description The Tektronix P6249 is a 4 GHz (probe only), 5X active FET probe with 1 pF input capacitance. The P6249 has a low input capacitance and high input resistance which minimize circuit loading over a wide bandwidth range. The small profile and low-mass head of the P6249 make probing crowded circuits by hand fast and easy.

  • Page 14: Optional Accessories

    H Color marker bands H .100” square pin adapter H Instruction manual Optional Accessories The following accessories are available for the P6249 probe: H SureFoot adapter probe tips H SMK4 Micro KlipChip adapters H Deskew fixture H Probe tip-to-SMA adapter...

  • Page 15: Features And Accessories

    Features and Accessories The P6249 is provided with several features and accessories designed to make probing and measurement a simpler task. Please familiarize yourself with these items and their uses. Features and Standard Accessories Table 1 shows the features and standard accessories of the probe.
  • Page 16 The lead may be removed by simply pulling the pin out by hand. When selecting the grounding connection, maintain as short a ground path as possible. Refer to page 18 for more information. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 17 Be sure to use the stabilization notch whenever Signal ground possible, to avoid slipping and damaging the adapter probe or circuitry under test. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 18 0.025 inch pins. When selecting the grounding connection, maintain as short a ground path as possible. Refer to page 18 for more information. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 19 The marker bands enable quick verification of which probe is connected to which instrument channel. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 20: Optional Accessories

    0.65 mm JEDEC and EIAJ packages. The red, 0.5 mm SureFoot tip is compatible with EIAJ packages. SMK4 Micro KlipChip adapters. Use the adapters to probe the leads on integrated circuits that are surface-mounted. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 21: Configuration

    TEKPROBE interface, use the optional Tektronix 1103 Probe Power Supply. If the P6249 is used with the Tektronix 1103 Probe Power Supply, be sure to have a 50 Ω termination at the oscilloscope. Also, set the oscilloscope channel coupling to DC.

  • Page 22: Figure 1: Dynamic And Offset Limitations

    6. Change the volts/division setting to the desired range, adjusting the offset to keep the trace on the zero reference level. NOTE. The P6249 has a ±5.0 V offset range. The linear operating range is ±2.0 V. See Figure 1. Also, see page 17 for more informa- tion.

  • Page 23: Functional Check

    Use the optional deskew fixture for optimum connections. See Figure 2. Deskew fixture Figure 2: Probe functional check connections 1. Connect the probe to the oscilloscope. 2. Set the oscilloscope to display the probe channel. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 24 DC. If the offset adjustment has no effect, set the vertical coupling to DC. If you are using the Tektronix 1103 Probe Power Supply, and the waveform is distorted, check to make sure that the oscilloscope termination is 50 Ω.

  • Page 25: Deskew Fixture

    The deskew fixture is configured to allow you to connect different probe models to the system. Refer to Figure 3 to see how two P6249 probes are connected. P6249 probe...

  • Page 26: Probe Calibration Errors

    Probe Calibration Errors If you get the message “Probe Cal Failed”, or other calibration anomalies occur, you may be using an oscilloscope that is not fully compatible with the P6249 probe, or you may have a hardware problem. Check Compatibility Before suspecting a problem with your probe, compare your oscilloscope firmware version with those listed in Table 3.

  • Page 27: Check For Hardware Problems

    H If offset zero is less than ±25 mV, check the Offset Range as instructed on page 45 in the Adjustments section. 4. Rerun the probe calibration function on the P6249 probe. If the probe calibration fails, run the calibration on another oscilloscope channel.
  • Page 28 Functional Check P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 29: Operating Basics

    Please follow these operating guidelines to get optimum performance from your P6249. Handling the Probe Exercise care when using and storing the P6249. The probe and cable are susceptible to damage caused by careless use. Always handle the probe using the compensation box and probe head, avoiding undue physical strain to the probe cable, such as kinking, excessive bending, or pulling.

  • Page 30: Ground Lead Length

    3 times greater than the frequency of your measurements. The low-inductance ground contacts described in Accessories on page 3 can help you reduce the effects of ground lead inductance on your measurements. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 31: Helpful Hints

    Attach a small piece of copper clad on top of the package and connect it to the package ground connection. Use the low-inductance ground lead provided with the P6249 to keep the ground lead length as short as possible. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 32: Surefoot Grounding

    Use a SureFoot adapter at the end of a short ground lead to connect directly to the package ground. This method is preferred over using an adjacent circuit ground because it is the shortest ground path possible. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 33: Probe Tip Test Points

    NOTE. Do not use pieces of solid-core copper wire be used as test points. If the wire breaks off in the probe tip socket, it may be impossible to remove the wire, and it will prevent insertion of other accessory tips. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 34 Helpful Hints P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 35: Specifications

    Specifications These specifications apply to a P6249 probe when used with a TDS 694C oscilloscope. The probe and oscilloscope must first be allowed to warm up for 20 minutes before measurements are taken. CAUTION. Do not apply voltages beyond the non-destructive input voltage range to the probe.

  • Page 36: Figure 7: Typical Input Impedance And Phase Versus Frequency

    - - 10° Phase - - 30° - - 50° - - 70° - - 90° - - 110° 10 M 100 M Frequency Figure 7: Typical input impedance and phase versus frequency P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 37: Figure 8: Typical Bandwidth

    Frequency Figure 8: Typical bandwidth Table 7: Environmental characteristics Operating Temperature 0° C to +40° C. The environmental exposure is the procedure stated in Tektronix Design Standard 062-2847-00 for Class 5 equipment. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 38 Normally only dry, nonconductive pollution occurs. Occasionally a temporary conductivity that is caused by condensation must be expected. This location is a typical office/home environment. Temporary condensation occurs only when the product is out of service. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 39 WARNING The following servicing instructions are for use only by qualified personnel. To avoid injury, do not perform any servicing other than that stated in the operating instructions unless you are qualified to do so. Refer to all Safety Summaries before performing any service.

  • Page 41: Theory Of Operation

    ±1 V Offset Offset Offset to probe zero - - 5 Offset gain +7 V Linear +5 V regulator - - 5 V Ground Probe TEKPROBE cable Interface Figure 9: P6249 simplified schematic diagram P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 42: Probe Head And Cable Assembly

    Adjustment section on page 43. Probe Identification EEPROM The probe identification EEPROM is used to configure the oscilloscope to the probe. The EEPROM receives a clock input from P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 43: Tekprobe Interface

    Figure 10 shows the TEKPROBE interface pin functions. Refer to your oscilloscope service documentation for more detailed specifications. - - 15 V - - 5 V Offset Ground Signal Data Clock +5 V +15 V Figure 10: TEKPROBE interface P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 44 Theory of Operation P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 45: Performance Verification

    Performance Verification Use the following procedures to verify the warranted specifications of the P6249 probe. Before beginning these procedures, refer to page 41 and photocopy the test record and use it to record the performance test results. The recommended calibration interval is one year.

  • Page 46: Equipment Setup

    However, certain firmware versions of TDS series oscilloscopes will return a Probe Cal Failed message. If this occurs, see Probe Calibration Errors on page 14 for more information. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 47: Output Zero

    The displayed DC level should be 0.00 V ±10 mV. 1103 Power supply Power supply Digital multimeter 50 Ω Precision terminator BNC-to-dual banana adapter Figure 11: Setup for output zero and DC attenuation accuracy P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 48: Dc Attenuation Accuracy

    |Vmax - - Vmin| = difference. Divide the difference by 5 to account for the ideal probe attenuation factor. For example: 0.8 is the difference between +2 and - - 2, divided by 5. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 49 The calculated error should be ≤2%. 12. Record the results on the test record. NOTE. An unaccceptable error value may result if a low tolerance termination is substituted for the recommended termination. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 50: Rise Time

    Record the rise time as t The system rise time (t ) that you measured in step 6 represents the rise time of the test system without the probe. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 51: Figure 13: Test System And Probe Rise Time Setup

    Internal input clock output Figure 13: Test system and probe rise time setup 10. Press the AUTOSET button. Set the vertical to 10 mV/div and horizontal to 100 ps/div. Turn averaging on. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 52 13. Calculate the probe only rise time using the following formula: − t (s+p) 14. Check that the calculated rise time meets the probe specification. ) must be ≤120 ps. The rise time (t 15. Record the results on the test record. P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 53 (at probe output) ± 10 mV (20_ C to 30_ C) -- 10 mV ________ ________ + 10 mV ≤2 % DC attenuation accuracy ________ ________ ≤120 ps Rise time ________ ________ P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 54 Performance Verification P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 55: Adjustments

    Adjustments The P6249 has two internal controls: offset zero and offset range. These controls rarely need to be adjusted, and only should be changed after a probe calibration and functional check has been performed on the oscilloscope. In order to make adjustments to the probe, the compensation box top cover needs to be removed with the optional release tool.

  • Page 56: Offset Zero

    2. Set the channel vertical offset to 0.00 V. 3. Measure the displayed DC level. 4. Adjust Offset Zero for 0.00 ± 15 mV. (±3 mV when measured directly without attenuation factor.) P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 57: Offset Range

    Ground Figure 15: 1103 power supply offset voltage location 3. Connect the equipment as shown in Figure 16. Take care not to disturb the offset level setting on the 1103 power supply. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 58: Figure 16: P6249 Offset Range Setup

    Figure 14 on page 43 for the location of the offset range adjustment. NOTE. After the offset zero and offset range have been adjusted, perform a probe calibration and functional check to verify perfor- mance. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 59: Maintenance

    Figure 17: Replacing TEKPROBE interface pins P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 60: Removing And Replacing The Compensation Box Covers

    3. With both sides of the box open, gently separate the two halves of the compensation box. Optional release tool Cover catches Figure 18: Removing the compensation box covers P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 61: Figure 19: Replacing The Compensation Box Cover

    2. Press the cover tabs in so that the cover can be lowered. 3. Slide the tabs into the notches. 4. Firmly press the pieces together until the cover catches snap into place. Tabs (4) Figure 19: Replacing the compensation box cover P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 62: Removing And Replacing The Tekprobe Interface Collar

    Align the tab to the slot and gently press the two pieces together. See Figure 20. Once installed, the TEKPROBE interface collar should rotate freely to lock and unlock. Slot Figure 20: Replacing the TEKPROBE interface collar P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 63: Inspection And Cleaning

    Replacement Parts Refer to Replaceable Parts on page 57 for a list of customer replaceable parts. Due to the sophisticated design of the P6249, there are no user replaceable parts within the probe. Preparation for Shipment...
  • Page 64 Maintenance P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 65: Troubleshooting

    NOTE. Certain firmware versions of TDS series oscilloscopes will return a “Probe Cal Failed” message when you run probe calibration routines on the P6249 probe. If this occurs, refer to Probe Calibration Errors on page 14. To troubleshoot the P6249, the probe must be attached to an operating TEKPROBE interface oscilloscope with the top cover of the compensation box removed.

  • Page 66: Figure 21: Compensation Box Test Point Locations

    50 Ω, or install a nonlinear signal feedthrough termination at the instrument input. Continue Distorted or Is the signal within Set channel vertical nonlinear signal linear dynamic offset to match signal range? See page 17. characteristic. P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 67: Troubleshooting

    See Figure 21. Power bad Check TEKPROBE interface pins on the compensation box. See page 47. Check TEKPROBE interface on host instrument. (Try an adjacent channel.) Repair host instrument P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 68 Troubleshooting P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 69: Replaceable Parts

    Replaceable Parts This section contains a list of replaceable parts for the P6249. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available from or through your local Tektronix, Inc. service center or representative.

  • Page 70: Using The Replaceable Parts List

    Indented items are part of, and included with, the next higher indentation. Attaching parts must be purchased separately, unless otherwise specified. Abbreviations Abbreviations conform to American National Standards Institute (ANSI) standard Y1.1 P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 71: Figure 22: P6249 Replaceable Parts

    Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 72: Figure 23: P6249 Standard Accessories

    Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 73 Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual...

  • Page 74: Figure 24: P6249 Optional Accessories

    Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 75 Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual...
  • Page 76 Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual...

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