Page 3 - WARRANTY
WARRANTY Tektronix warrants that the products that it manufactures and sells will be free from defectsin materials and workmanship for a period of one (1) year from the date of shipment. If aproduct proves defective during this warranty period, Tektronix, at its option, either willrepair the defecti...
Page 5 - Table of Contents; Product Description
P6249 4 GHz 5X Active Probe Instruction Manual i Table of Contents General Safety Summary v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Safety Summary vii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product Description Options 1 . . . . . . . . . . . . . . . ....
Page 6 - ii; Performance Verification
Table of Contents ii P6249 4 GHz 5X Active Probe Instruction Manual SpecificationsTheory of Operation Probe Head and Cable Assembly 36 . . . . . . . . . . . . . . . . . . . . . . . Compensation Box 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset Amplifier 36 . . . . ....
Page 7 - iii; List of Figures
Table 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)...
Page 8 - iv; P6249 4 GHz 5X Active Probe Instruction Manual
Table of Contents iv P6249 4 GHz 5X Active Probe Instruction Manual
Page 9 - General Safety Summary; Only qualified personnel should perform service procedures.; To Avoid Fire or Personal Injury
P6249 4 GHz 5X Active Probe Instruction Manual v General Safety Summary Review the following safety precautions to avoid injury and preventdamage to this product or any products connected to it. To avoidpotential hazards, use this product only as specified. Only qualified personnel should perform se...
Page 10 - Safety Terms and Symbols; Terms in This Manual.; Warning statements identify conditions or practices that; Terms on the Product.
General Safety Summary vi P6249 4 GHz 5X Active Probe Instruction Manual Safety Terms and Symbols Terms in This Manual. 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 identif...
Page 11 - vii; Service Safety Summary; Do Not Service Alone.; Do not perform internal service or adjustments
P6249 4 GHz 5X Active Probe Instruction Manual vii Service Safety Summary Only qualified personnel should perform service procedures. Readthis Service Safety Summary and the General Safety Summary beforeperforming any service procedures. Do Not Service Alone. Do not perform internal service or adjus...
Page 12 - viii
Service Safety Summary viii P6249 4 GHz 5X Active Probe Instruction Manual
Page 13 - Options
P6249 4 GHz 5X Active Probe Instruction Manual 1 Product Description The Tektronix P6249 is a 4 GHz (probe only), 5X active FET probewith 1 pF input capacitance. The P6249 has a low input capacitanceand high input resistance which minimize circuit loading over a widebandwidth range. The small profil...
Page 14 - Optional Accessories
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 ...
Page 15 - Contacting Tektronix; Phone
Product Description P6249 4 GHz 5X Active Probe Instruction Manual 3 Contacting Tektronix Phone 1-800-833-9200* Address Tektronix, Inc.Department or name (if known)14200 SW Karl Braun DriveP.O. Box 500Beaverton, OR 97077USA Web site www.tektronix.com Sales support 1-800-833-9200, select option 1* Se...
Page 17 - Features and Accessories; The TEKPROBE
P6249 4 GHz 5X Active Probe Instruction Manual 5 Features and Accessories The P6249 is provided with several features and accessories designedto make probing and measurement a simpler task. Please familiarizeyourself with these items and their uses. Probe tip socket Groundsocket Stabilization notch ...
Page 23 - Configuration; Do not attempt to install the P6249 on a non-TEKPROBE; Probe Offset; NOTE
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 anoscilloscope with a TEKPROBE interface, display readouts arecorrected for the probe attenuation factor, the instr...
Page 24 - Figure 1: Dynamic and offset limitations
Configuration 12 P6249 4 GHz 5X Active Probe Instruction Manual To 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....
Page 25 - Functional Check; Figure 2: Probe functional check connections
P6249 4 GHz 5X Active Probe Instruction Manual 13 Functional Check After installing the probe on the oscilloscope, a functional checkmay be performed using the PROBE COMPENSATION connectionson the front panel of the oscilloscope. Use the optional deskewfixture for optimum connections. See Figure 2. ...
Page 27 - Deskew Fixture; Figure 3: Deskew fixture connections (two P6249 probes shown)
Functional Check P6249 4 GHz 5X Active Probe Instruction Manual 15 Deskew Fixture The optional deskew fixture provides a convenient way to connectthe probes in your system to the calibration signal for deskewing.The deskew fixture is configured to allow you to connect differentprobe models to the sy...
Page 28 - Probe Calibration Errors; Check Compatibility
Functional Check 16 P6249 4 GHz 5X Active Probe Instruction Manual Probe Calibration Errors If you get the message “Probe Cal Failed”, or other calibrationanomalies occur, you may be using an oscilloscope that is not fullycompatible with the P6249 probe, or you may have a hardwareproblem. Check Comp...
Page 31 - Operating Basics; Handling the Probe
P6249 4 GHz 5X Active Probe Instruction Manual 19 Operating Basics Please follow these operating guidelines to get optimum performancefrom your P6249. Handling the Probe Exercise care when using and storing the P6249. The probe and cableare susceptible to damage caused by careless use. Always handle...
Page 32 - Ground Lead Length; ) at which this parasitic circuit will resonate, using the
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 aground lead as possible between the probe head and circuit ground.When you touch your probe tip to a circuit element, you areintroducing a new resista...
Page 33 - Figure 4: Maximum frequency vs. measurement lead length
Operating Basics P6249 4 GHz 5X Active Probe Instruction Manual 21 1 2 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,...
Page 35 - Helpful Hints; Follow these helpful hints to make probing easier and noise free.; Low-Inductance Grounding
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 canminimize ground lead length and inductance. See Figure 5. Figure 5: Low-inductance gro...
Page 36 - SureFoot Grounding; Figure 6: Using a SureFoot adapter for grounding
Helpful Hints 24 P6249 4 GHz 5X Active Probe Instruction Manual This method is very useful when making many measurements on thesame package. Using a ground plane on the package makes probingthe package easier and avoids adding unnecessary ground lead lengthand distortion. SureFoot Grounding If you c...
Page 37 - Probe Tip Test Points; Figure 7: Using a probe tip as a test point
Helpful Hints P6249 4 GHz 5X Active Probe Instruction Manual 25 Probe Tip Test Points You can solder the push-in probe tip or a 0.025 square pin to acircuit, 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 ont...
Page 39 - Specifications; Do not apply voltages beyond the non-destructive input; Table 2: Warranted electrical specifications
P6249 4 GHz 5X Active Probe Instruction Manual 27 Specifications These specifications apply to a P6249 probe when used with aTDS 694C oscilloscope. The probe and oscilloscope must first be allowed to warm up for20 minutes before measurements are taken. CAUTION. Do not apply voltages beyond the non-d...
Page 40 - Figure 8: Typical input impedance and phase versus frequency
Specifications 28 P6249 4 GHz 5X Active Probe Instruction Manual Table 3: Typical 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 Offset Scale Accuracy ± 2% (o...
Page 41 - Table 4: Physical Characteristics; Gain; Figure 9: Typical bandwidth
Specifications P6249 4 GHz 5X Active Probe Instruction Manual 29 Table 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 Gain + 20 Log ǒ V OUT V IN Ǔ Figure 9: Typical ...
Page 42 - Table 6: Certifications and compliances
Specifications 30 P6249 4 GHz 5X Active Probe Instruction Manual Table 5: Environmental characteristics (Cont.) Humidity 80% RH at 40 ° C. The environmental exposure is as stated in TektronixDesign Standard 062-2847-00 for Class 5 equipment. Packaged Product Vibration andShock The packaged product q...
Page 43 - Category
Specifications P6249 4 GHz 5X Active Probe Instruction Manual 31 Table 6: Certifications and compliances (cont.) Category Standards or description EN 50082-1 Immunity: IEC 61000-4-2 Electrostatic Discharge ImmunityIEC 61000-4-3 RF Electromagnetic Field ImmunityIEC 61000-4-4 Electrical Fast Transient...
Page 45 - WARNING
The following servicing instructions are for use only byqualified personnel. To avoid injury, do not perform anyservicing other than that stated in the operating instructionsunless you are qualified to do so. Refer to all SafetySummaries before performing any service. WARNING
Page 47 - Theory of Operation; Figure 10: P6249 simplified schematic diagram
P6249 4 GHz 5X Active Probe Instruction Manual 35 Theory of Operation There are no user replaceable parts within the probe or thecompensation box; however, this theory of operation is provided toassist you in isolating failures to either the probe or the hostoscilloscope. Refer to Figure 10 for the ...
Page 48 - Offset Amplifier
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 thatbuffers and amplifies the input signal. The amplifier receives powerand an offset level from the compensation box assembly via thecable...
Page 49 - TEKPROBE Interface; Figure 11: TEKPROBE interface
Theory of Operation P6249 4 GHz 5X Active Probe Instruction Manual 37 the oscilloscope, and information about the probe is passed to theoscilloscope. TEKPROBE Interface The TEKPROBE interface provides a communication path betweenthe probe and the oscilloscope. Contact pins provide power, signal,offs...
Page 51 - These procedures test the following specifications:; Equipment Required; Table 7: Equipment required for performance verification
P6249 4 GHz 5X Active Probe Instruction Manual 39 Performance Verification Use the following procedures to verify the warranted specificationsof the P6249 probe. Before beginning these procedures, refer topage 47 and photocopy the test record and use it to record theperformance test results. The rec...
Page 52 - Item Description; Equipment Setup; Use this procedure to set up the equipment to test the probe.; Connect the probe to the oscilloscope.
Performance Verification 40 P6249 4 GHz 5X Active Probe Instruction Manual Table 7: Equipment required for performance verification (Cont.) Item Description Recommended Example PerformanceRequirement BNC-to-BNC coaxial cable 50 W coaxial cable 012-1342-00 Coaxial cable Male-to-Male SMA, 20 in 174-14...
Page 53 - Output Zero; Use this procedure to verify the probe output zero.; Connect the test equipment as shown in Figure 12.; The displayed DC level should be 0.00 V; Figure 12: Setup for output zero and DC attenuation accuracy
Performance Verification 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 1103 power supply. 3. Ground the probe tip by connecting ...
Page 54 - DC Attenuation Accuracy
Performance Verification 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 pro...
Page 55 - Determine the percent error by using the formula below:; The calculated error should be; Record the results on the test record.
Performance Verification P6249 4 GHz 5X Active Probe Instruction Manual 43 11. Determine the percent error by using the formula below: %Error + [M1 * M2 0.4 * 1] 100% The calculated error should be ≤ 2%. 12. Record the results on the test record. NOTE . An unaccceptable error value may result if a l...
Page 56 - Rise Time; Connect the test equipment as shown in Figure 13.; Figure 13: Test system rise time setup
Performance Verification 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 bymeasuring the test system without the probe attached, and the testsystem plus the p...
Page 57 - Disconnect the calibration generator remote head from the 1103; Figure 14: Test system and probe rise time setup; to display a signal similar to that shown in Figure 14.
Performance Verification P6249 4 GHz 5X Active Probe Instruction Manual 45 The following steps instruct you to assemble the test setup thatincludes the probe, as shown in Figure 14. The system and probe risetime (t s+p ) that you measure in step 12 is used to calculate the probe rise time (t p ) in ...
Page 58 - Calculate the probe only rise time using the following formula:
Performance Verification 46 P6249 4 GHz 5X Active Probe Instruction Manual NOTE . Do not touch the probe tip adapter when making calibration measurements. Measurement accuracy is degraded when the probetip adapter is handled. 12. Use the oscilloscope measurement capability to display rise time. Rise...
Page 59 - Test record; Performance test
Performance Verification P6249 4 GHz 5X Active Probe Instruction Manual 47 Test record Probe Model: Serial Number: Certificate Number: Temperature: RH %: Date of Calibration: Technician: Performance test Minimum Incoming Outgoing Maximum Output zero voltage (at probe output) ± 10 mV (20 _ C to 30 _ ...
Page 61 - Adjustments; Adjustment Locations
P6249 4 GHz 5X Active Probe Instruction Manual 49 Adjustments The P6249 has two internal controls: offset zero and offset range.These controls rarely need to be adjusted, and only should bechanged after a probe calibration and functional check has beenperformed on the oscilloscope. In order to make ...
Page 62 - Offset Zero; Use this procedure to adjust the probe offset zero.; Ground the probe tip by connecting the probe tip to the probe; mV when measured
Adjustments 50 P6249 4 GHz 5X Active Probe Instruction Manual Offset Zero Use this procedure to adjust the probe offset zero. NOTE . If your oscilloscope has a probe calibration routine, clear the probe calibration constants at this time. If the offset zero is adjusted, perform a functional check of...
Page 63 - Offset Range; Power on the 1103 power supply and turn on the offset.; Figure 16 for the location of the offset voltage test point.; Figure 16: 1103 power supply offset voltage location; disturb the offset level setting on the 1103 power supply.
Adjustments P6249 4 GHz 5X Active Probe Instruction Manual 51 Offset Range Use this procedure to adjust the offset range of the probe. The offsetzero of the probe should be checked before making any adjustmentto the offset range. The offset range of the probe is approximately–3.5 to +3.5 volts. 1. P...
Page 64 - Adjust Offset Range for a DMM reading of 0 V
Adjustments 52 P6249 4 GHz 5X Active Probe Instruction Manual 1103 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....
Page 65 - Maintenance; Replacing TEKPROBE Interface Pins; Figure 18: Replacing TEKPROBE interface pins
P6249 4 GHz 5X Active Probe Instruction Manual 53 Maintenance This section describes the maintenance and repair procedures for theP6249. Replacing TEKPROBE Interface Pins TEKPROBE interface pins can stick and fail to make contact aftertime. Periodically check to see that each of the interface pins m...
Page 66 - Removing and Replacing the Compensation Box Covers; Follow these steps to open the compensation box.; Press the optional release tool pins into the compensation box; of the compensation box.; With both sides of the box open, gently separate the two halves of; the compensation box.; Figure 19: Removing the compensation box covers
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. Referto Fi...
Page 67 - Align the tabs with the notches on the cover halves. Refer to
Maintenance P6249 4 GHz 5X Active Probe Instruction Manual 55 To 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 pi...
Page 68 - Removing and Replacing the TEKPROBE Interface Collar; Figure 21: Replacing the TEKPROBE interface collar
Maintenance 56 P6249 4 GHz 5X Active Probe Instruction Manual Removing and Replacing the TEKPROBE Interface Collar To remove the TEKPROBE interface collar, firmly grasp thecompensation box body with one hand, and the TEKPROBEinterface collar with the other hand. Firmly pull the interface collaroff. ...
Page 69 - Inspection and Cleaning; Do not immerse the probe or use abrasive cleaners.; Replacement Parts; Use a corrugated cardboard shipping carton having inside
Maintenance P6249 4 GHz 5X Active Probe Instruction Manual 57 Inspection and Cleaning To prevent damage to probe materials, avoid using chemicals thatcontain benzine, benzene, toluene, xylene, acetone, or similarsolvents. Do not immerse the probe or use abrasive cleaners. Dirt may be removed with a ...
Page 71 - Troubleshooting; Observe caution when probing in the compensation
P6249 4 GHz 5X Active Probe Instruction Manual 59 Troubleshooting This troubleshooting documentation details isolation to either theprobe or the oscilloscope. NOTE . Certain firmware versions of TDS series oscilloscopes will return a “Probe Cal Failed” message when you run probe calibrationroutines ...
Page 73 - Symptom
Troubleshooting P6249 4 GHz 5X Active Probe Instruction Manual 61 Table 8: Troubleshooting guide (Cont.) Symptom Action Result Checks Distorted ornonlinear signal Is the signal withinlinear dynamicrange? See page 19. No Set channel verticaloffset to match signalcharacteristic. No Offset Adjust(Signa...
Page 75 - Replaceable Parts; Parts Ordering Information; Part number
P6249 4 GHz 5X Active Probe Instruction Manual 63 Replaceable Parts This section contains a list of replaceable parts for the P6249. Usethis list to identify and order replacement parts. Parts Ordering Information Replacement parts are available from or through your localTektronix, Inc. service cent...
Page 76 - Using the Replaceable Parts List; Item Names
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 forquick retrieval. Understanding the structure and features of the listwill help you find the information you need for ordering repl...
Page 77 - Figure
Replaceable Parts P6249 4 GHz 5X Active Probe Instruction Manual 65 1 2 3 4 Figure 23: P6249 replaceable parts Fig. & index no. Tektronix 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 SERI...
