Tektronix P6241 Instruction Manual
Tektronix P6241 Instruction Manual

Tektronix P6241 Instruction Manual

4.0 ghz 10x active probe zzz
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  • 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 P6241 4.0 GHz 10X Active Probe Instruction Manual www.tektronix.com 071-1188-04...
  • Page 3 Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued and pending.
  • Page 4 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 6: Table Of Contents

    ....... . Performance Verification ......P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 7 ... Figure 6: Typical effects of using probe tip adapter ..Figure 7: Waveform distortion from ground lead length P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 8 ....Figure 27: P6241 optional accessories ....P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 9 Table 8: Equipment required for performance verification Table 9: Troubleshooting guide ..... . . P6241 4.0 GHz 10X Active Probe 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. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 11 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. This symbol may appear on the product: CAUTION Refer to Manual P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 12: Service Safety Summary

    Disconnect power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components. To avoid electric shock, do not touch exposed connections. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 13 Service Safety Summary P6241 4.0 GHz 10X Active Probe Instruction Manual viii...
  • Page 14: Preface

    Preface This is the Instruction Manual for the P6241 probe. This manual provides operating information, specifications, service information and a replaceable parts list. Manual Structure The manual includes both operating and service information. The first section of the manual contains the topics for operating the probe.
  • Page 15 Preface P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 16: Product Description

    Product Description The Tektronix P6241 is a 4.0 GHz, 10X active probe with <0.5 pF input capacitance. The P6241 low input capacitance and high (40 kΩ) input resistance minimize circuit loading over a wide bandwidth range. The small profile and low-mass head of the P6241 make probing dense circuits by hand fast and easy.
  • Page 17 Product Description P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 18: Features And Accessories

    Features and Accessories The P6241 probe 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. WARNING. To avoid injury, use care when handling accessories with sharp tips.
  • Page 19 Features and Accessories Table 1: P6241 features and standard accessories (Cont.) Feature/Accessory Description Short ground pogo pin. This pogo ground pin has a flexible reach of .070 to 1.00 inches, and a .083 inch nominal center space. The pin retracts when pressure is applied.
  • Page 20 Features and Accessories Table 1: P6241 features and standard accessories (Cont.) Feature/Accessory Description Three-inch ground lead. Use the three-inch ground lead for general probing. The socketed end of the lead may be connected to any of the probe tips and adapters or fitted onto 0.025 inch square pins.
  • Page 21 Features and Accessories Table 1: P6241 features and standard accessories (Cont.) Feature/Accessory Description Square-pin adapter. Square-pin adapter This adapter has a socket for holding a square pin, or an adapter such as the SureToe, Square-pin SMT KlipChip, and Y-lead adapters. A square-pin...
  • Page 22 Features and Accessories Table 1: P6241 features and standard accessories (Cont.) Feature/Accessory Description SureToe adapter (4 ea) . The SureToe adapter is a pointed probe tip useful for probing in IC legs. SureToe adapter Mount the SureToe adapter in the signal pin socket of the Square-pin adapter.
  • Page 23 Features and Accessories Table 1: P6241 features and standard accessories (Cont.) Feature/Accessory Description Square-pin adapter SMT KlipChip. Use the clips of the SMT KlipChip to access fragile, dense circuitry. SMT KlipChip To use SMT KlipChips with the probe, connect the Square-pin adapter to the probe head. Plug...
  • Page 24 Features and Accessories Table 1: P6241 features and standard accessories (Cont.) Feature/Accessory Description Instrument case. The instrument case protects the probe from harsh environments. Tektronix part number: 016-1879-XX Instruction Manual. Provides specifications and instructions for operating the probe, and a list of accessories and adapters.
  • Page 25: Table 2: Optional Accessories

    (deskew) and to optimize host instrument gain and offset accuracy at the probe tip. The probes are held in place allowing hands-free operation without requiring a probe arm. Tektronix part number: 067-0484-XX P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 26 Tektronix part number: SMK4 (2 sets of 2) Release tool. Use for opening the compensation box to access adjustments. Tektronix part number: 003-1383-XX Adjustment tool. Use for making internal adjustments to the probe. Tektronix part number: 003-1433-XX P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 27 Features and Accessories P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 28: Configuration

    Damage to the probe and connector may result. If your host instrument does not support the TEKPROBE interface, use the optional Tektronix 1103 Probe Power Supply. If the P6241 is used with the Tektronix 1103 Probe Power Supply, be sure to have a 50 Ω...
  • Page 29 6. Change the volts/division setting to the desired range, adjusting the offset to keep the trace on the zero reference level. NOTE. The P6241 has a ±10.0 V offset range. The linear operating range is ±4.0 V. See Figure 1. Also, see page 26 for more informa- tion.
  • Page 30: Figure 1: Dynamic And Offset Limitations

    - - 4.0 V - - 10.0 V - - 10.0 V - - 14.0 V Nonoperating range (- - 30 V maximum nondestructive input voltage ) Figure 1: Dynamic and offset limitations P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 31 Configuration P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 32: Functional Check

    2. Gently press the lead pins from the Y-lead adapter into the signal and ground sockets of the square-pin adapter. 3. Plug the KlipChips into the Y-lead adapter. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 33: Figure 3: Probe Functional Check Connections

    (see Figure 4 on page 20), and proceed to step 6. 4. Using a ground lead and a SMT KlipChip, connect the probe ground to the PROBE COMPENSATION ground connection on the host instrument. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 34 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 host instrument termination is 50 Ω.
  • Page 35: Deskew Fixture

    The deskew fixture is configured to allow you to connect different probe models to the system. Refer to Figure 4 to see how two P6241 probes are connected. Figure 5 provides an enlarged view of the deskew fixture connections.
  • Page 36: Figure 5: Detail Of Deskew Fixture Connections

    Functional Check Solder pads Figure 5: Detail of deskew fixture connections For part number information for the deskew fixture, refer to Replaceable Parts on page 67. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 37: Probe Calibration Errors

    Probe Calibration Errors If you get the message “Probe Cal Failed”, or other calibration anomalies occur, you may be using a host instrument that is not fully compatible with the P6241 probe, or you may have a hardware problem. Check Compatibility Before suspecting a problem with your probe, compare your host instrument firmware version with those listed in Table 3.
  • Page 38: Check For Hardware Problems

    NOTE. Step 3 does not apply to TDS3000 series instruments, because they do not support the offset zero function. 4. Rerun the probe calibration function on the P6241 probe. If the probe calibration fails, run the calibration on another oscilloscope channel.
  • Page 39 Functional Check P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 40: Operating Basics

    Please follow these operating guidelines to get optimum performance from your P6241. Handling the Probe Exercise care when using and storing the P6241. 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.
  • Page 41: Input Linear Dynamic Range

    Operating Basics Input Linear Dynamic Range The probe head amplifier used by the P6241 has a limited linear operating range. The usable dynamic range is ±4.0 V however, to keep the input linearity error less than 0.1% you must limit the apparent signal input voltage to ±3.75 V.
  • Page 42: Ground Lead Length

    When you touch your probe tip to a circuit element, you are introducing a new resistance, capacitance, and inductance into the circuit. This represents the characteristics of your probe and ground lead. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 43: Electrical Effects Of Ground Lead Length

    The series inductance added by the probe tip and ground lead can result in a resonant circuit; this circuit may cause parasitic ringing within the bandwidth of your host instrument. Refer to Figure 7 on page 29. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 44: Figure 7: Waveform Distortion From Ground Lead Length

    Short ground pogo pin Customizable ground lead at 1.0 in Customizable ground lead at full length 2.5 in 3.0 in Ground lead with SMT KlipChip Figure 7: Waveform distortion from ground lead length P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 45 Operating Basics P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 46: Helpful Hints

    Attach a small piece of copper clad wire on top of the IC package and connect it to the IC package ground connection. Use the short pogo pin ground lead or the customizable ground lead to keep the ground lead length as short as possible. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 47: Suretoe Grounding

    Use a SureToe adapter at the end of a short ground lead to connect directly to the IC package ground. This method is preferred over using an adjacent circuit ground, because it is the shortest ground path possible. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 48: Specifications

    Offset Range --10.0 V to +10.0 V 5.3 ns ±0.2 ns Delay Time System Noise 300 V rms or less at output of probe with probe tip grounded P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 49 ±2% (of 10X actual probe gain) DC Offset Scale Accuracy ±(2% of input + (2% of offset) + 100 mV DC Voltage Measurement Accuracy , referred to input output offset + 80 mV linearity error) P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 50: Table 6: Physical Characteristics

    Frequency (Hz) Magnitude Phase Figure 10: Typical input impedance and phase versus frequency Table 6: Physical characteristics Characteristic Description Net Shipping Weight 1.41 kg (3.1 lb) Cable Length 1.3 meters (51.18 in) P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 51 - - 32 - - 35 - - 38 - - 41 50 MHz 100 MHz 200 MHz 500 MHz 1 GHz 2 GHz 4 GHz 8 GHz Frequency Figure 11: Typical bandwidth P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 52: Table 7: Environmental Characteristics

    Shock Cycle 1 Assurance Level II for packaged products 0 to 20 lbs. Test 2 for Warehouse and Vehicle Stacking (Compression) is omitted. Pollution Degree Pollution Degree 2 as defined in IDC61010-1 P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 53 Specifications P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 54 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 56: Theory Of Operation

    ±1 V offset Offset Offset to probe zero - - 5 Offset gain +7 V Linear +15 V regulator - - 5 V Ground Probe TEKPROBE cable interface Figure 12: P6241 simplified schematic diagram P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 57: Probe Head And Cable Assembly

    The offset amplifier has two adjustments: offset zero and offset gain. These adjustments rarely need attention; however, detailed adjustment instructions are in the Adjustments section on page 55. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 58: Probe Identification Eeprom

    Figure 13 shows the TEKPROBE interface pin functions. Refer to your host instrument service documentation for more detailed specifications. - - 15 V - - 5 V Offset Ground Signal Data Clock +5 V +15 V Figure 13: TEKPROBE interface P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 59 Theory of Operation P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 60: Performance Verification

    Performance Verification Use the following procedures to verify the warranted specifications of the P6241 probe. Before beginning these procedures, photocopy the test record on page 54, and use it to record the performance test results. The recommended calibration interval is one year.
  • Page 61: Equipment Setup

    012-0031-XX Lead (2) Banana to banana, black 012-0039-XX Nine digit part numbers (XXX-XXXX-XX) are Tektronix part numbers Equipment Setup Use this procedure to set up the equipment to test the probe. 1. Connect the probe to the 1103 power supply.
  • Page 62: Output Zero

    The displayed DC level should be 0.00 V ±10 mV. 1103 Power supply Digital multimeter KlipChip 50 Ω Precision adapters Y-lead BNC-to-dual termination Square pin adapter banana adapter adapter P6241 probe head Figure 14: Setup for output zero P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 63: Dc Gain Accuracy

    |Vmax - - Vmin| = difference. Divide the difference by 10 to account for the ideal probe attenuation factor. For example: 0.4 is the difference between +2 and - - 2, divided by 10. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 64 The calculated error should be ≤2%. 12. Record the results on the test record. NOTE. An unacceptable error value may result if a low tolerance termination is substituted for the recommended termination. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 65: Rise Time

    BNC to SMA adapter coaxial cable Calibration 1103 Power supply step generator Input Output Generator remote head (80E0X) CSA8000/TDS8000 Trigger input Internal clock output Input Figure 16: Test system rise time setup P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 66 1103 power supply. 9. Turn the calibration generator remote head on, and then connect the probe tip adapter to it using the SMA female-female adapter. Insert the probe tip into the probe tip adapter. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 67 12. Use the oscilloscope measurement capability to display rise time. Rise time is determined from the 10% and 90% amplitude points on the waveform. Record the rise time as t s+p. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 68 13. Calculate the probe only rise time using the following formula: (s+p) 14. Check that the calculated rise time meets the probe specification. The rise time (t ) must be 120 ps. 15. Record the results on the test record. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 69 Output zero voltage (at probe output) ± 10 mV (20 _C to 30 _C) -- 10 mV ________ ________ + 10 mV ≤2% DC gain accuracy ________ ________ ≤120 ps Rise time ________ ________ P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 70: Adjustments

    Adjustments The P6241 has two internal controls: offset zero and offset range. These controls rarely need to be adjusted, and should only be changed after a probe calibration and functional check have been performed on the host instrument. To make adjustments to the probe, the compensation box top cover needs to be removed with the optional release tool.
  • Page 71: Offset Zero

    1. Ground the probe tip by connecting the probe tip to the probe ground socket. 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. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 72: Offset Range

    Ground Figure 19: 1103 power supply offset voltage location 3. Connect the equipment as shown in Figure 20. Take care not to disturb the offset level setting on the 1103 power supply. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 73 Figure 18 on page 55 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. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 74: Maintenance

    Figure 21: Replacing TEKPROBE interface pins P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 75: 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 22: Removing the compensation box covers P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 76 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 23: Replacing the compensation box cover P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 77: Inspection And Cleaning

    Replacement Parts Refer to Replaceable Parts on page 67 for a list of customer replaceable parts. Due to the sophisticated design of the P6241, there are no user replaceable parts within the probe. Preparation for Shipment...
  • Page 78: Troubleshooting

    Probe Calibration Errors on page 22. To troubleshoot the P6241, the probe must be attached to an operating TEKPROBE interface host instrument with the top cover of the compensation box removed. Refer to page 60 for instructions on opening the compensation box.
  • Page 79: Table 9: Troubleshooting Guide

    Probe power OK. Replace probe. Distorted or Is the instrument set Set termination to to 50 Ω termination? 50 Ω, or install a nonlinear signal feedthrough termination at the instrument input. Continue. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 80 See Figure 24. Power bad Check TEKPROBE interface pins on the compensation box. See page 59. Check TEKPROBE interface on host instrument. (Try an adjacent channel.) Repair host instrument. P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 81 Troubleshooting P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 82: Replaceable Parts

    Replaceable Parts This section contains a list of replaceable parts for the P6241. 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 83: 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 P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 84 Replaceable Parts P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 85 Replaceable Parts P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 86 Replaceable Parts P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 87 Replaceable Parts P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 88 Replaceable Parts P6241 4.0 GHz 10X Active Probe Instruction Manual...
  • Page 89 Replaceable Parts P6241 4.0 GHz 10X Active Probe Instruction Manual...

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