Tektronix P6249 manuale d’uso

Instruction Manual P6249 4 GHz 5X Active Pr obe 071-0538-03 www .tektronix.com[...]

Copyright © T ektronix, Inc. All rights reserved. T ektronix 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. T ektronix, Inc., P .O. Box 500, Beaverton, OR 97077 TEKTRONIX and TEK are regi[...]

W ARRANTY T ektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If a product proves defective during this warranty period, T ektronix, at its option, either will repair the defective product without charge for parts and labo[...]

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P6249 4 GHz 5X Active Probe Instruction Manual i T able of Contents General Safety Summary v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Description Options 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

T able of Contents ii P6249 4 GHz 5X Active Probe Instruction Manual Specifications Theory of Operation Probe Head and Cable Assembly 36 . . . . . . . . . . . . . . . . . . . . . . . Compensation Box 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset Amplifier 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

T able of Contents P6249 4 GHz 5X Active Probe Instruction Manual iii List of Figures Figure 1: Dynamic and offset limitations 12 . . . . . . . . . . . . . . . . . Figure 2: Probe functional check connections 13 . . . . . . . . . . . . . . Figure 3: Deskew fixture connections (two P6249 probes shown) 15 . . . . . . . . . . . . . . . . . . . . . . .[...]

T able of Contents iv P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual v General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. T o avoid potential hazards, use this product only as specified. Only qualified personnel should perform service pr ocedur es. T o A void Fire or Personal[...]

General Safety Summary vi P6249 4 GHz 5X Active Probe Instruction Manual Safety T erms and Symbols T erms in This Manual. These terms may appear in this manual: W ARNING. W arning statements identify conditions or practices that could r esult in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could r esult [...]

P6249 4 GHz 5X Active Probe Instruction Manual vii Service Safety Summary Only qualified personnel should perform service procedures. Read this 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 cap[...]

Service Safety Summary viii P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 1 Product Description The T ektronix 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 [...]

Product Description 2 P6249 4 GHz 5X Active Probe Instruction Manual H Right-angle adapter H Three-inch ground lead H Low-inductance ground pogo pin H Color marker bands H SMK4 Micro KlipChip adapters H .100 ” square pin adapter H Instruction manual Optional Accessories The following accessories are available for the P6249 probe: H Deskew fixture[...]

Product Description P6249 4 GHz 5X Active Probe Instruction Manual 3 Contacting T ektronix Phone 1-800-833-9200 * Address T ektronix, Inc. Department or name (if known) 14200 SW Karl Braun Drive P .O. Box 500 Beaverton, OR 97077 USA Web site www .tektronix.com Sales support 1-800-833-9200, select option 1 * Service support 1-800-833-9200, select op[...]

Product Description 4 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 5 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. Probe tip socket Ground socket Stabilization notch Probe head assembly . The probe head is designe[...]

Features and Accessories 6 P6249 4 GHz 5X Active Probe Instruction Manual Installing the push-in probe tip. Attach the push-in probe tip by seating the tip into the probe tip socket and pushing the tip in until it is seated. Either end of the tip may be used. Do not force the tip . Also, be careful not to poke yourself with the sharp probe-tip. T o[...]

Features and Accessories P6249 4 GHz 5X Active Probe Instruction Manual 7 SureT oe probe tip. The SureT oe tip is a pointed probe tip useful for probing in dense circuitry . Attach the SureT oe adapters the same way as the push-in probe tips. Do not force the tip . Also, be careful not to poke yourself with the sharp probe tip. They can be used wit[...]

Features and Accessories 8 P6249 4 GHz 5X Active Probe Instruction Manual 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 pins. T o attach the ground lead, press and rotate the lead pin connector into the ground [...]

Features and Accessories P6249 4 GHz 5X Active Probe Instruction Manual 9 KlipChip Y -lead adapter SMT KlipChip. Use the SMT KlipChip test clips to access fragile, dense circuitry . KlipChip test clips can be connected to the Y -lead or three-inch ground leads. Simply press the lead socket into the KlipChip handle. The KlipChip body freely turns, a[...]

Features and Accessories 10 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 11 Configuration The P6249 provides the oscilloscope with the probe model number , serial number , and attenuation factor . When connected to an oscilloscope with a TEKPROBE interface, display readouts are corrected for the probe attenuation factor , the instrument input is set to 50 W , and the coupli[...]

Configuration 12 P6249 4 GHz 5X Active Probe Instruction Manual T o set the probe offset, follow these steps: 1. Set the oscilloscope coupling to GND . 2. Use the vertical position control to set a zero reference level on the oscilloscope display . 3. Set the oscilloscope coupling to DC and 5 V/div . 4. Attach the probe to the circuit. 5. Adjust th[...]

P6249 4 GHz 5X Active Probe Instruction Manual 13 Functional Check After installing the probe on the oscilloscope, a functional check may be performed using the PROBE COMPENSA TION connections on the front panel of the oscilloscope. Use the optional deskew fixture for optimum connections. See Figure 2. Deskew fixture A B Figure 2: Probe functional [...]

Functional Check 14 P6249 4 GHz 5X Active Probe Instruction Manual 3. If you have the optional deskew fixture, connect it to the PROBE COMPENSA TION connections. Connect the probe to the deskew fixture (see Figure 3 on page 15), and proceed to step 6. 4. Using a ground lead and a SMT KlipChip, connect the probe ground to the PROBE COMPENSA TION gro[...]

Functional Check P6249 4 GHz 5X Active Probe Instruction Manual 15 Deskew Fixture The optional deskew fixture provides a convenient way to connect the probes in your system to the calibration signal for deskewing. 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 pr[...]

Functional Check 16 P6249 4 GHz 5X Active Probe Instruction Manual 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 w[...]

Functional Check P6249 4 GHz 5X Active Probe Instruction Manual 17 Other TDS 500, 600, or 700 series oscilloscopes may give the error message “ Probe Cal Failed ” when you run the probe calibration function, but the probe will still meet its warranted specifications. Check for Hardware Problems If the firmware version on your TDS 500, 600, or 7[...]

Functional Check 18 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 19 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 [...]

Operating Basics 20 P6249 4 GHz 5X Active Probe Instruction Manual Ground Lead Length When you are probing a circuit, you should always use as short a ground lead as possible between the probe head and circuit ground. When you touch your probe tip to a circuit element, you are introducing a new resistance, capacitance, and inductance into the circu[...]

Operating Basics P6249 4 GHz 5X Active Probe Instruction Manual 21 12 3 1000 900 800 700 600 500 400 300 200 100 0 Measurement lead length (Inches) Frequency (MHz) 1.2 1.4 1.6 1.8 2.2 2.4 2.6 2.8 Figure 4: Maximum frequency vs. measurement lead length In order to reach two test points with a P6249, a 2-inch length return ground lead is used. What i[...]

Operating Basics 22 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 23 Helpful Hints Follow these helpful hints to make probing easier and noise free. Low-Inductance Grounding Placing a ground plane on top of a package being probed can minimize ground lead length and inductance. See Figure 5. Figure 5: Low-inductance grounding Attach a small piece of copper clad on top[...]

Helpful Hints 24 P6249 4 GHz 5X Active Probe Instruction Manual This method is very useful when making many measurements on the same package. Using a ground plane on the package makes probing the package easier and avoids adding unnecessary ground lead length and distortion. SureFoot Grounding If you cannot use the recommended low-inductance ground[...]

Helpful Hints P6249 4 GHz 5X Active Probe Instruction Manual 25 Probe Tip T est Points Y ou can solder the push-in probe tip or a 0.025 square pin to a circuit, to be used as a temporary test point. See Figure 7. Solder the tip onto a lead or pin with a low-power soldering iron. Press the probe head onto the tip to make a measurement, and then pull[...]

Helpful Hints 26 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 27 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 pr obe. Da[...]

Specifications 28 P6249 4 GHz 5X Active Probe Instruction Manual T able 3: T ypical electrical characteristics (Cont.) Offset Range – 5.0 V to +5.0 V DC Offset Drift 150 m V/ ° C or less at output of probe 0.75 mV/ ° C or less displayed on screen with TEKPROBE interface DC Of fset Scale Accuracy ± 2% (of 5X actual probe gain) Delay Time 5.05 n[...]

Specifications P6249 4 GHz 5X Active Probe Instruction Manual 29 T able 4: Physical Characteristics Net Shipping Weight 1.78 kg (3.93 lb) Cable Length 1.3 meters – 10 Frequency 10 MHz 1 MHz 100 MHz 10 GHz – 12 – 14 – 16 – 18 – 20 – 22 – 24 – 26 – 28 1 GHz Gain dB Gai n + 20 Log ǒ V OUT V IN Ǔ Figure 9: T ypical bandwidth T abl[...]

Specifications 30 P6249 4 GHz 5X Active Probe Instruction Manual T able 5: Environmental characteristics (Cont.) Humidity 80% RH at 40 ° C. The environmental exposure is as stated in T ektronix Design Standard 062-2847-00 for Class 5 equipment. Packaged Product Vibration and Shock The packaged product qualifies under the Distribution Cycle 1 Assur[...]

Specifications P6249 4 GHz 5X Active Probe Instruction Manual 31 T able 6: Certifications and compliances (cont.) Category Standards or description EN 50082-1 Immunity: IEC 61000-4-2 Electrostatic Discharge Immunity IEC 61000-4-3 RF Electromagnetic Field Immunity IEC 61000-4-4 Electrical Fast Transient/Burst Immunity IEC 61000-4-5 Power Line Surge [...]

Specifications 32 P6249 4 GHz 5X Active Probe Instruction Manual T able 6: Certifications and compliances (cont.) Category Standards or description Pollution Degree A measure of the contaminates that could occur in the environment around and within a product. T ypically the internal environment inside a product is considered to be the same as the e[...]

The following servicing instructions are for use only by qualified personnel. T o 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. W ARNING[...]

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P6249 4 GHz 5X Active Probe Instruction Manual 35 Theory of Operation There are no user replaceable parts within the probe or the compensation box; however , this theory of operation is provided to assist you in isolating failures to either the probe or the host oscilloscope. Refer to Figure 10 for the simplified schematic. Offset gain Offset zero [...]

Theory of Operation 36 P6249 4 GHz 5X Active Probe Instruction Manual Probe Head and Cable Assembly The probe head assembly contains an active amplifier circuit that buffers and amplifies the input signal. The amplifier receives power and an offset level from the compensation box assembly via the cable assembly . All signal amplification and buffer[...]

Theory of Operation P6249 4 GHz 5X Active Probe Instruction Manual 37 the oscilloscope, and information about the probe is passed to the oscilloscope. TEKPROBE Interface The TEKPROBE interface provides a communication path between the probe and the oscilloscope. Contact pins provide power , signal, offset, and data transfer for the probe identifica[...]

Theory of Operation 38 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 39 Performance V erification Use the following procedures to verify the warranted specifications of the P6249 probe. Before beginning these procedures, refer to page 47 and photocopy the test record and use it to record the performance test results. The recommended calibration interval is one year . Th[...]

Performance V erification 40 P6249 4 GHz 5X Active Probe Instruction Manual T able 7: Equipment required for performance verification (Cont.) Item Description Recommended Example Performance Requirement BNC-to-BNC coaxial cable 50 W coaxial cable 012-1342-00 Coaxial cable Male-to-Male SMA, 20 in 174-1427-00 Precision coaxial cable Male-to-Male SMA,[...]

Performance V erification P6249 4 GHz 5X Active Probe Instruction Manual 41 Output Zero Use this procedure to verify the probe output zero. 1. Connect the test equipment as shown in Figure 12. 2. Attach the probe to a TEKPROBE interface on the 1 103 power supply . 3. Ground the probe tip by connecting the probe tip to the probe ground socket. (Conn[...]

Performance V erification 42 P6249 4 GHz 5X Active Probe Instruction Manual DC Attenuation Accuracy Use this procedure to verify the probe DC attenuation accuracy . Before beginning, read the procedure through completely . 1. Connect the test equipment as shown in Figure 12 on page 41. 2. Attach the probe to a TEKPROBE interface on the 1 103 power [...]

Performance V erification P6249 4 GHz 5X Active Probe Instruction Manual 43 11 . Determine the percent error by using the formula below: % Erro r + [ M 1 * M 2 0.4 * 1] 100% The calculated error should be ≤ 2%. 12. Record the results on the test record. NOTE . An unaccceptable err or value may r esult if a low tolerance termination is substituted[...]

Performance V erification 44 P6249 4 GHz 5X Active Probe Instruction Manual Rise Time This procedure verifies that the probe meets rise time specifications. The probe rise time is calculated from rise times obtained by measuring the test system without the probe attached, and the test system plus the probe. 1. Connect the test equipment as shown in[...]

Performance V erification P6249 4 GHz 5X Active Probe Instruction Manual 45 The following steps instruct you to assemble the test setup that includes the probe, as shown in Figure 14. The system and probe rise time ( t s+p ) that you measure in step 12 is used to calculate the probe rise time ( t p ) in step 13. 7. Disconnect the calibration genera[...]

Performance V erification 46 P6249 4 GHz 5X Active Probe Instruction Manual NOTE . Do not touch the pr obe tip adapter when making calibration measur ements. Measur ement accuracy is degraded when the pr obe tip adapter is handled. 12. Use the oscilloscope measurement capability to display rise time. Rise time is determined from the 10% and 90% amp[...]

Performance V erification P6249 4 GHz 5X Active Probe Instruction Manual 47 T est record Probe Model: Serial Number: Certificate Number: T emperature: RH %: Date of Calibration: T echnician: Performance test Minimum Incoming Outgoing Maximum Output zero voltage (at probe output) ± 10 mV (20 _ C to 30 _ C) – 10 mV ________ ________ + 10 mV DC att[...]

Performance V erification 48 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 49 Adjustments The P6249 has two internal controls: offset zero and of fset 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[...]

Adjustments 50 P6249 4 GHz 5X Active Probe Instruction Manual Offset Zero Use this procedure to adjust the probe of fset zero. NOTE . If your oscilloscope has a pr obe calibration r outine, clear the pr obe calibration constants at this time. If the offset zer o is adjusted, perform a functional check of the offset range befor e closing the compens[...]

Adjustments P6249 4 GHz 5X Active Probe Instruction Manual 51 Offset Range Use this procedure to adjust the of fset range of the probe. The offset zero of the probe should be checked before making any adjustment to the offset range. The of fset range of the probe is approximately – 3.5 to +3.5 volts. 1. Power on the 1 103 power supply and turn on[...]

Adjustments 52 P6249 4 GHz 5X Active Probe Instruction Manual 1 103 Power supply – + Power supply + Digital multimeter – BNC-to-dual Banana Adapter 50 W Precision terminator Figure 17: P6249 offset range setup 4. Set the DC power supply (using the DMM) to +2.5 VDC. 5. Observe the DC value on the DMM. 6. Adjust Offset Range for a DMM reading of [...]

P6249 4 GHz 5X Active Probe Instruction Manual 53 Maintenance This section describes the maintenance and repair procedures for the P6249. Replacing TEKPROBE Interface Pins TEKPROBE interface pins can stick and fail to make contact after time. Periodically check to see that each of the interface pins move freely and fully extends out of the interfac[...]

Maintenance 54 P6249 4 GHz 5X Active Probe Instruction Manual Removing and Replacing the Compensation Box Covers Follow these steps to open the compensation box. 1. Press the optional release tool pins into the compensation box cover catches and gently lift the cover off a small distance. Refer to Figure 19. 2. Hold the open edge apart, and use the[...]

Maintenance P6249 4 GHz 5X Active Probe Instruction Manual 55 T o replace the covers, follow these steps: 1. Align the tabs with the notches on the cover halves. Refer to Figure 20. 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 p[...]

Maintenance 56 P6249 4 GHz 5X Active Probe Instruction Manual Removing and Replacing the TEKPROBE Interface Collar T o remove the TEKPROBE interface collar , firmly grasp the compensation box body with one hand, and the TEKPROBE interface collar with the other hand. Firmly pull the interface collar off. T o replace the interface collar , first note[...]

Maintenance P6249 4 GHz 5X Active Probe Instruction Manual 57 Inspection and Cleaning T o prevent damage to probe materials, avoid using chemicals that contain benzine, benzene, toluene, xylene, acetone, or similar solvents. Do not immerse the probe or use abrasive cleaners. Dirt may be removed with a soft cloth dampened with a mild deter gent and [...]

Maintenance 58 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 59 T roubleshooting This troubleshooting documentation details isolation to either the probe or the oscilloscope. NOTE . Certain firmwar e versions of TDS series oscilloscopes will r eturn a “ Probe Cal Failed ” message when you run pr obe calibration r outines on the P6249 pr obe. If this occurs, [...]

T roubleshooting 60 P6249 4 GHz 5X Active Probe Instruction Manual Refer to T able 8 for troubleshooting procedures, and Figure 22 for troubleshooting test points. – 5 (White) Offset (Blue) Ground (Black) Data – 5 Offset Clock +5 Offset range adjust Offset zero adjust J1 J4 +5 (Red) Figure 22: Compensation box test point locations T able 8: T r[...]

T roubleshooting P6249 4 GHz 5X Active Probe Instruction Manual 61 T able 8: T roubleshooting guide (Cont.) Symptom Action Result Checks Distorted or nonlinear signal Is the signal within linear dynamic range? See page 19. No Set channel vertical offset to match signal characteristic. No Offset Adjust (Signal present) Go to Probe Power row Probe po[...]

T roubleshooting 62 P6249 4 GHz 5X Active Probe Instruction Manual[...]

P6249 4 GHz 5X Active Probe Instruction Manual 63 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 T ektronix, Inc. service center or representative. Changes to T ektronix ins[...]

Replaceable Parts 64 P6249 4 GHz 5X Active Probe Instruction Manual Using the Replaceable Parts List The tabular information in the Replaceable Parts List is arranged for quick retrieval. Understanding the structure and features of the list will help you find the information you need for ordering replacement parts. Item Names In the Replaceable Par[...]

Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual 65 1 2 3 4 Figure 23: P6249 replaceable parts Fig. & index no. T ektronix part no. Serial no. Effective Dscont Qty 12345 name & description Mfr . code Mfr . part no. 23 – 1 010-0622-00 1 PROBE, FET ACT :>4 GHZ,5X,1PF ,TDS SERIES 80009 010-0622-00 – 2 131-3627-02 1 CONT [...]

Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual 66 2 3 5 6 7 8 9 10 11 12 1 4 Figure 24: P6249 standard accessories[...]

Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual 67 Fig. & index no. T ektronix part no. Serial no. Effective Dscont Qty 12345 name & description Mfr . code Mfr . part no. ST ANDARD ACCESSORIES 24 – 1 196-3456-00 1 LEAD SET :ACCESSOR Y KIT , INCL THREE 3.0 INCH GROUND LEAD, TWO DIFFERENTIAL LEAD 80009 196-3456-00 – 2 131[...]

Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual 68 1 2 3 4 Figure 25: P6249 optional accessories Fig. & index no. T ektronix part no. Serial no. Effective Dscont Qty 12345 name & description Mfr . code Mfr . part no. OPTIONAL ACCESSORIES 25-1 003-1433-02 1 ADJUSTMENT TOOL 80009 003-1433-02 -2 003-1383-00 1 RLSE TOOL,COVER:C[...]

Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual 69 CROSS INDEX – MFR. CODE NUMBER TO MANUF ACTURER Mfr . Code Manufacturer Address City , State, Zip Code 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR PO BOX 500 BEA VERTON OR 97077 – 0001[...]

Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual 70[...]