Tektronix P6135A Instruction Manual
Tektronix P6135A Instruction Manual

Tektronix P6135A Instruction Manual

Differential probe pair
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A l l t e s t I n s t r u me n t s , I n c .
5 0 0 C e n t r a l A v e .
F a r mi n g d a l e , N J 0 7 7 2 7
P : ( 7 3 2 ) 9 1 9 - 3 3 3 9
F : ( 7 3 2 ) 9 1 9 - 3 3 3 2
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T h e t e s t & me a s u r e me n t
e q u i p me n t y o u n e e d a t
t h e p r i c e y o u w a n t .
A l l t e s t c a r r i e s t h e w o r l d ' s l a r g e s t s e l e c t i o n o f
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o f t e c h n i c i a n s a n d e n g i n e e r s .
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• S a t i s f a c t i o n g u a r a n t e e d
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A n y p r o j e c t . A n y b u d g e t .
t
G e t a q u o t e t o d a y !
C C a l l ( 7 3 2 ) 9 1 9 - 3 3 3 9 o r e ma i l s a l e s @a l l t e s t . n e t .

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Summary of Contents for Tektronix P6135A

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 Instruction Manual P6135A Differential Probe Pair 070-7675-02 Warning The servicing instructions are for use by qualified personnel only. To avoid personal injury, do not perform any servicing unless you are qualified to do so. Refer to all safety summaries prior to performing service.
  • Page 3 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 4 Tektronix, shipping charges prepaid, and with a copy of customer proof of purchase. 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.
  • Page 6: Table Of Contents

    System Calibration and Time Delay Error Compensation (11A33 only) ....... . . 4–18 P6135A Instruction Manual...
  • Page 7 ........6–3 Mfr. Code to Manufacturer Cross Index ....6–3 P6135A Instruction Manual...
  • Page 8 Table of Contents List of Figures Figure 1–1: P6135A differential probe pair with accessories 1–2 Figure 1–2: Probe finger guard and hand contact area ..1–6 Figure 2–1: Optimizing low-frequency CMRR performance ........
  • Page 9 Table 4–2: Verification points for CMRR (with 11A33 and 7A13) ....... . 4–17 P6135A Instruction Manual...
  • Page 10: 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. P6135A Instruction Manual...
  • Page 11 These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property. P6135A Instruction Manual...
  • Page 12: Preface

    Preface This manual contains information on how to use and maintain the P6135A differential probe pair. The manual is organized into the following sections: Getting Started provides a product overview and introduction to probe features and accessories. Operating Basics discusses techniques for improving measure- ment accuracy.
  • Page 13: Contacting Tektronix

    1-800-833–9200 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: support@tek.com For product support outside of North America, contact your local Tektronix distributor or sales office. Service Tektronix offers extended warranty and calibration support programs as options on many products. Contact your local Tektronix distributor or sales office.
  • Page 14: Getting Started

    Getting Started...
  • Page 16: Product Description

    The probes need not be used as a pair. When used individually, each will provide highly accurate signal transmission to any compatible oscilloscope input. When the P6135A probe pair is used on a differential amplifier, the adjustable attenuation ratio compensates for differences in amplifier input resistance, thus improving the common-mode rejection ratio (CMRR) of the system.
  • Page 17: Standard Accessories

    BNC shell, locking ring Compensation box Figure 1–1: P6135A Differential Probe Pair with accessories Standard Accessories Standard accessories for the P6135A probe pair are listed below. Retractable hook tips Low-inductance ground lead and collars Ground lead with sockets Ground lead with alligator clips...
  • Page 18: Probe Features

    Getting Started Probe Features The following table discusses P6135A probe pair components, connectors, and standard accessories. Refer to Figure 1–1 to identify items within the probe pair. BNC Shell, Locking Ring. Locks the probe onto the instrument. To install, fully rotate the locking ring counter-clockwise as viewed from the cable end of the compensation box.
  • Page 19 Probe Tip. Acquires the signal from the circuit under test. The P6135A probe pair comes standard with two tip holders for storage and three pairs of color-coded attenuator tips. Red: for oscilloscopes with 13 to 17 pF inputs.
  • Page 20: Grounding The Probe

    WARNING. To avoid electric shock when using the probe, keep your fingers behind the finger guard on the probe body. See Figure 1–2 below. Hand contact area Finger guard Figure 1–2: Probe finger guard and hand contact area P6135A Instruction Manual 1–5...
  • Page 21: Choosing The Correct Probe Tip

    Getting Started Choosing the Correct Probe Tip The P6135A probe pair comes with three sets of matched probe tips. Each probe is shipped with the red tip installed. Choose the correct set of tips for your instrument: Use the red tips for 11000 Series oscilloscopes that have 15 pF inputs.
  • Page 22: Operating Basics

    Operating Basics...
  • Page 24: Probe Calibration

    Operating Basics This section discusses technical issues you should consider when using the P6135A probe pair. Probe Calibration Accurate differential measurements require careful matching of both channels of the differential measurement system. In calibrating a probe pair to obtain optimum common-mode rejection ratio (CMRR), the adjustments compensate for imbalances in the differential amplifier and between the probes themselves.
  • Page 25: Balancing Probe Pair Impedance Differences

    CMRR performance. A major advantage of using the P6135A probe pair with differential amplifiers is that loading is reduced at mid-to-high frequencies because of lower input capacitance. This reduced loading minimizes...
  • Page 26: Probe Grounding

    Volts/Div switch and is limited only by the bandwidth and input voltage ratings of the system. Probe Grounding When using the P6135A probe pair for low-frequency CMRR measurements (less than 1 MHz), neither probe should be grounded to the equipment under test. Instead, the probe shields should be connected together at the probe bodies as shown in Figure 2–1.
  • Page 27: Figure 2-2: Optimizing High-Frequency Cmrr Performance

    127 MHz, which is within the frequency response of the instrument. This effect greatly degrades risetime, bandwidth, and transient accuracy as shown in Figure 2–4. To minimize ground lead inductance, use the low-inductance ground lead and collar. P6135A Instruction Manual 2–4...
  • Page 28: Figure 2-3: A Series Resonant Circuit

    Operating Basics source Probe 10.5pF source Ground lead L Figure 2–3: A series resonant circuit 10ns/div Effects using a six inch ground lead Figure 2–4: Effects of ground-lead inductance P6135A Instruction Manual 2–5...
  • Page 29 Operating Basics P6135A Instruction Manual 2–6...
  • Page 30: Specifications

    Specifications...
  • Page 32: Table 3-1: Electrical Characteristics

    Specifications This section lists the electrical, environmental, and physical specifications of the P6135A probe pair. All specifications are guaranteed unless labeled “typical”. Typical specifications are provided for your convenience and are not guaranteed. Specifica- tions marked with the symbol are verified in in the Performance Verification and Calibration Procedures beginning on page 4–1.
  • Page 33: Figure 3-1: Typical Input Impedance

    DC to 1 kHz, deceasing to 100:1 at 20 MHz. See Figures 3–3 and 3–4. System characteristic. See oscilloscope manual to verify system specifications. –25 Magnitude (ohms) –50 Phase (degrees) –75 –100 Frequency (Hz) Figure 3–1: Typical input impedance P6135A Instruction Manual 3–2...
  • Page 34: Figure 3-2: Typical Voltage Derating Vs. Frequency

    Specifications Frequency (MHz) Figure 3–2: Typical voltage derating vs. frequency Verification points CMRR, 11A33 P6135A with 11A33 100,000:1 10,000:1 CMRR 1,000:1 100:1 10 kHz 1 MHz 20 MHz 1 kHz 100 kHz 10 MHz Frequency Figure 3–3: Typical CMRR vs frequency with 11A33 oscilloscope P6135A Instruction Manual 3–3...
  • Page 35: Figure 3-4: Typical Cmrr Vs Frequency With 7A13 Oscilloscope

    Specifications Verification points CMRR, 7A13 only P6135A with 7A13 100,000:1 10,000:1 CMRR 1,000:1 100:1 10 kHz 1 MHz 20 MHz 1 kHz 100 kHz 10 MHz Frequency Figure 3–4: Typical CMRR vs frequency with 7A13 oscilloscope Table 3–2: Environmental characteristics...
  • Page 36: Table 3-3: Physical Characteristics

    Official Journal of the European Communi- ties: Low Voltage Directive 73/23/EEC, as amended by 93/68/EEC. HD401 S1:1980 Safety Requirements for Electronic Apparatus Pollution degree Degree 2 Safety class Class 1 (ground reference) P6135A Instruction Manual 3–5...
  • Page 37 Specifications P6135A Instruction Manual 3–6...
  • Page 38: Performance Verification And Calibration Procedures

    Performance Verification and Calibration Procedures...
  • Page 40: Test Equipment

    Calibration: adjustment procedures to return the probes to factory calibration. You must be familiar with the basic operation of the oscilloscope being used with the P6135A probe pair prior to performing any procedure. NOTE. The procedures in this section are for 11000 and 7000 Series oscilloscopes but also apply to 5000 Series oscilloscopes with the exception of the HF compensation procedure.
  • Page 41: Table 4-1: Test Equipment

    Description Minimum requirements Example product Oscilloscope system Tektronix 11000 Series oscilloscope with 11A33 differential amplifier. Tektronix 7000 Series oscil- loscope with 7A13 differen- tial comparator-amplifier and 7B92A time base. Calibration generator Amplitude range adjustable Wavetek 9500 Universal Calibration System with...
  • Page 42: Single-Ended Applications

    7000 Series oscilloscopes. Differential comparator Setting 11A33 7A13 Menu WAVEFORM — + Input – Input Offset — Volts/Div 10 mV 10 mV Bandwidth 20 MHz 5 MHz Position Centered Centered P6135A Instruction Manual 4–3...
  • Page 43 6. Adjust the offset or V voltage to position the top of the calibrator waveform to the center graticule line. Note and record the offset or V reading. P6135A Instruction Manual 4–4...
  • Page 44 DC ATTEN control so the waveform bottom lines up on the center graticule line. NOTE. You will have to remove the positive probe compensation box from the oscilloscope to adjust the negative probe. P6135A Instruction Manual 4–5...
  • Page 45: Check And Adjust Low-Frequency (Lf) Compensation

    10 mV 200 mV Bandwidth 20 MHz 5 MHz Position Centered Centered Time base Setting 11000 Series 7000 Series Menu TRIGGER — Coupling Mode AUTO LEVEL P-P AUTO Level — Source — Time/Div 20 s 20 s P6135A Instruction Manual 4–6...
  • Page 46 7. Repeat Steps 3 through 5 above for the negative probe compensa- tion box and adjust the bottom of the waveform for flatness. NOTE. You will have to remove the positive probe compensation box from the oscilloscope to adjust the negative probe. P6135A Instruction Manual 4–7...
  • Page 47: Check And Adjust High-Frequency (Hf) Compensation

    200 mV 200 mV Bandwidth 150 MHz FULL Position Centered Centered Time base Setting 11000 Series 7000 Series Menu TRIGGER — Coupling Mode AUTO LEVEL P-P AUTO Level — Source — Time/Div 20 ns 20 ns P6135A Instruction Manual 4–8...
  • Page 48: Check Bandwidth And System Rise Time

    Substitute the sine wave generator output for the calibration generator output. Use the second column of values for 11000 Series oscilloscopes and the third column of values for 7000 Series oscilloscopes. Differential comparator Setting 11A33 7A13 Menu WAVEFORM — + Input P6135A Instruction Manual 4–9...
  • Page 49 Time/Div 50 s 50 s Sine wave generator Function Setting Mode 50 kHz Voltage (peak to peak) NOTE. To prevent excessive capacitive loading, connect only one probe at a time to the sine wave generator output. P6135A Instruction Manual 4–10...
  • Page 50 Set the positive input to GND (OFF) and the negative input to DC. Set the sine wave generator frequency to 50 kHz and repeat steps 2 through 5 above. P6135A Instruction Manual 4–11...
  • Page 51: Common Mode Applications

    Check and Adjust DC Attenuation 1. Connect the test setup as shown in Figure 4–1. Calibration generator Test oscilloscope BNC to BNC adapter Probe tip adapter Probe tip adapter BNC T adapter Figure 4–1: Setup for adjustment of DC attenuation P6135A Instruction Manual 4–12...
  • Page 52 10 mV 10 mV Bandwidth 20 MHz 5 MHz Position Centered Centered Time base Setting 11000 Series 7000 Series Menu TRIGGER — Coupling Mode AUTO LEVEL P-P AUTO Level — Source — Time/Div 500 s 500 s P6135A Instruction Manual 4–13...
  • Page 53: Check And Adjust Lf And Hf Compensation

    2. Set the test equipment controls as indicated in the tables below. Use the second column of values for 11000 Series oscilloscopes and the third column of values for 7000 Series oscilloscopes. Differential comparator Setting 11A33 7A13 Menu WAVEFORM — + Input – Input Offset — Volts/Div P6135A Instruction Manual 4–14...
  • Page 54 Level — Source — Time/Div 20 s 20 s Sine wave generator Function Setting Frequency 50 kHz Voltage (peak to peak) 3. Adjust the sine wave generator output to display a waveform five divisions in amplitude. P6135A Instruction Manual 4–15...
  • Page 55 12. Repeat Steps 7 through 11 above two or three times to achieve optimum probe performance. NOTE. Some interaction exists between the LF, HF, and DC adjustments. Repeat the adjustment sequence (steps 6 through 12) two or three times to achieve optimum results. Use Table 4–2 for verification. P6135A Instruction Manual 4–16...
  • Page 56: System Calibration And Time Delay Error Compensation (11A33 Only)

    The input channel is now vertically calibrated and deskewed (propagation delay balanced) against an internal reference signal. The P6135A probe is calibrated and ready for use in common-mode signal application measurements. See Figure 4–2 for an example CMRR display following calibration.
  • Page 57: Figure 4-2: Typical Cmrr Display After Calibration

    CMRR. .1 Div Input is 10 V at 50kHz Figure 4–2: Typical CMRR display after calibration P6135A Instruction Manual 4–18...
  • Page 58 Maintenance...
  • Page 60: Preventive Maintenance

    Visual Inspection Occasionally inspect the P6135A probe pair for broken connections, damaged parts, bent leads, or heat-damaged components. Cleaning To remove accumulated dirt from the probe exterior, use a soft cloth dampened with a mild detergent and water solution or isopropyl alcohol.
  • Page 61: Probe Tip Replacement

    5. If desired, screw on the tip cover and slide the retractable-hook tip back into place. Cable Ground lead with socket Probe tip Tip cover Retractable hook tip Cable Probe tip Tip cover Ground lead with socket Retractable hook tip Figure 5–1: P6135A probe tip assembly P6135A Instruction Manual 5–2...
  • Page 62: Readjustment After Repair

    2. Surround the probe with protective polyethylene sheeting. 3. Cushion the probe on all sides with at least two inches of tightly packed urethane foam or other packing material. 4. Seal the carton with shipping tape or an industrial stapler. P6135A Instruction Manual 5–3...
  • Page 63 Maintenance P6135A Instruction Manual 5–4...
  • Page 64: Replaceable Parts

    Replaceable Parts...
  • Page 66: Parts Ordering Information

    Replaceable Parts This section contains a list of the replaceable modules for the P6135A differential probe pair. Use this list to identify and order replacement parts. Parts Ordering Information Replacement parts are available through your local Tektronix field office or representative.
  • Page 67: Using The Replaceable Parts List

    Using the Replaceable Parts List This section contains a list of the mechanical and/or electrical components that are replaceable for the P6135A probe pair. Use this list to identify and order replacement parts. The following table describes each column in the parts list.
  • Page 68: Abbreviations

    97077–0001 TK2469 UNITREK CORPORATION 3000 LEWIS & CLARK HWY VANCOUVER, WA 98661 SUITE 2 TK2548 XEROX CORPORATION 14181 SW MILLIKAN WAY BEAVERTON, OR 97005 TK2565 VISION PLASTICS INC 26000 SW PARKWAY WILSONVILLE, OR 97070 CENTER DRIVE P6135A Instruction Manual 6–3...
  • Page 69 Replaceable Parts P6135A Instruction Manual 6–4...
  • Page 70 Replaceable Parts 6–5 P6135A Instruction Manual...
  • Page 71 Replaceable Parts P6135A Instruction Manual 6–6...
  • Page 72 Replaceable Parts 6–7 P6135A Instruction Manual...
  • Page 73 Replaceable Parts P6135A Instruction Manual 6–8...
  • Page 74 Replaceable Parts 6–9 P6135A Instruction Manual...
  • Page 75 Replaceable Parts P6135A Instruction Manual 6–10...

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