Tektronix Thermometer P6249 User's Manual
Contents
1. DC Offset Scale Accuracy 2 of 5X actual probe gain Delay Time 5 05 ns 0 2 ns System Noise 300 uV rms or less at output of probe with probe tip grounded 110 22 K 90 20 K 70 18 K Magnitude 50 16 K E P 30 14K lt i 10 12 K E 10 10 K E _30 Phase 8K 50 6K 70 4K 90 2K 110 0 1M 10M 100 M 1G 5G Freguency Figure 8 Typical input impedance and phase versus freguency 28 P6249 A GHz 5X Active Probe Instruction Manual Specifications Table 4 Physical Characteristics Net Shipping Weight 1 78 kg 3 93 Ib Cable Length 10 1 3 meters 12 14 16 Gain dB 22 24 Gain lt Vour 20 Log vz 26 28 1 MHz 10 MHz 100 MHz 1 GHz 10 GHz Freguency Figure 9 Typical bandwidth Table 5 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 Nonoperating Temperature 40 C to 71 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 29 Specifications2. Table 5 Environmental characteristics Cont Humidity 80 RH at 40 C The environmental exposure is as stated in Tektronix Design Standard 062 2847 00 for Class 5 equipment Packaged Product Vibration and Shock The packaged product qualifies under the Distribution Cycle 1 Assurance Level Il for packaged products 0 to 20 lbs Test 2 for Warehouse and Vehicle Stacking Compression is omitted Tektronix standard 062 2858 00 Rev B Class 5 Electrostatic Immunity IEC 61000 4 2 EMC IEC 801 3 Altitude Operating 15 000 ft Non Operating 50 000 ft Pollution Degree Pollution Degree 2 Table 6 Certifications and compliances Category EC Declaration of Conformity EMC 30 Standards or description Meets intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official J ournal of the European Union EN 55011 EN 55011 Class A Radiated and Conducted Emissions Class B Radiated and Conducted Emissions EN 61000 3 2 AC Power Line Harmonic Emissions EN 61000 3 3 AC Power Line Flicker P6249 4 GHz 5X Active Probe Instruction Manual Specifications Table 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
3. Helpful Hints 26 P6249 A GHz 5X Active Probe Instruction Manual 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 AN may result CAUTION Do not apply voltages beyond the non destructive input voltage range to the probe Damage to the probe or circuit under test Table 2 Warranted electrical specifications DC Attenuation Accuracy probe only Output Zero Rise Time probe only Table 3 Typical electrical characteristics Bandwidth probe only 0 2 2 excludes offset error 10 mV or less at output of probe 120 ps 4 GHz See Figure 9 Linear Input Dynamic Range 2 0 V to 22 0 V Equivalent to 0 4 V to 40 4 V atthe output of the probe Linearity Nondestructive Input Voltage Range Input Resistance Input Capacitance P6249 4 GHz 5X Active Probe Instruction Manual zx 0 196 over a dynamic range of 1 75 V to 1 75 V 1 096 over a dynamic range of 2 0 V to 32 0 V 30 V to 430 V DC peak AC 20 kO at DC See Figure 8 1 0 pF 27 Specifications Table 3 Typical electrical characteristics Cont Offset Range 5 0 V to 5 0 V DC Offset Drift 150 uV C or less at output of probe 0 75 mV C or less displayed on screen with TEKPROBE interface
4. If the offset zero is adjusted perform a functional check of the offset range before closing the compensation box 1 Ground the probe tip by connecting the probe tip to the probe ground socket 2 Setthe channel vertical offset to 0 00 V 3 Measure the displayed DC level 4 Adjust Offset Zero for 0 00 15 mV 43 mV when measured directly without attenuation factor 50 P6249 4 GHz 5X Active Probe Instruction Manual Adjustments Offset Range Use this procedure to adjust the offset range of the probe The offset zero of the probe should be checked before making any adjustment to the offset range The offset range of the probe is approximately 3 5 to 3 5 volts 1 Power on the 1103 power supply and turn on the offset 2 Using a DMM adjust the 1103 offset voltage to 0 5 V Refer to Figure 16 for the location of the offset voltage test point OFFSET VAR Ov e FINE O6 OFFSET VAR Ov e FINE Offset voltage Ground Figure 16 1103 power supply offset voltage location 3 Connect the equipment as shown in Figure 17 Take care not to disturb the offset level setting on the 1103 power supply P6249 4 GHz 5X Active Probe Instruction Manual 51 Adjustments 1103 Power supply Power supply Digital multimeter OO nue DR 500 Precision terminator BNC to dual Banana Adapter Figure 17 P6249 offset range setup 4
5. Burst Immunity IEC 61000 4 5 Power Line Surge Immunity IEC 61000 4 6 Radio Frequency Common Mode IEC 61000 4 8 Power Frequency Magnetic Field IEC 61000 4 11 Voltage Dips and Interruptions Australia New Zealand Complies with EMC provision of Radiocommunications Act Declaration of per the following standard s Conformity EMC AS NZS 2064 1 2 Industrial Scientific and Medical Equipment 1992 AS NZS 3548 Information Technology Eguipment 1995 EMC Compliance Meets the intent of Directive 89 336 EEC for Electromagnetic Compatibility when it is used with the product s stated in the specifications table Refer to the EMC specification published for the stated products May not meet the intent of the directive if used with other products FCC Compliance Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits P6249 4 GHz 5X Active Probe Instruction Manual 31 Specifications Table 6 Certifications and compliances cont Category Pollution Degree 32 Standards or description A measure of the contaminates that could occur in the environment around and within a product Typically the internal environment inside a product is considered to be the same as the external Products should be used only in the environment for which they are rated Pollution Degree 1 No pollution or only dry nonconductive pollution occurs Products in this category are generally encapsulated hermetically s
6. Signal C C Ground o BN B o P6249 probe Figure 3 Deskew fixture connections two P6249 probes shown For part number information for the deskew fixture refer to Replaceable Parts on page 63 P6249 4 GHz 5X Active Probe Instruction Manual 15 Functional Check 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 1 Table 1 TDS 500 600 or 700 series oscilloscopes fully compatible with the P6249 probe Model number Firmware version required TDS 520D greater than FV 6 3e TDS 540D greater than FV 6 3e TDS 580D greater than FV 6 3e TDS 654C FV 5 1e or above TDS 680C FV 5 1e or above TDS 684C FV 5 1e or above TDS 694C all versions compatible TDS 724D greater than FV 6 3e TDS 754D greater than FV 6 3e TDS 784D greater than FV 6 3e TDS 794D greater than FV 6 3e NOTE You can take P6249 probe measurements with any TDS 500 600 or 700 series oscilloscope regardless of firmware version The fully compatible oscilloscopes listed in Table I give you enhanced accuracy after successfully passing the probe calibration function P6249 4 GHz 5X Active Probe Instruction Manual Functional Check Other T
7. instrument supports probe calibration routines now is a g00d time to perform them However certain firmware versions of TDS series oscilloscopes will return a Probe Cal Failed message If this occurs refer to Probe Calibration Errors on page 16 7 Disconnect the probe from the deskew fixture or SIGNAL terminal and ground the probe tip Connect the KlipChip to the probe tip 8 With the probe offset set to 0 0 V the oscilloscope display should be at the ground reference 9 Set the oscilloscope volts division to 1 V 10 Adjust the probe offset The displayed waveform should vary between approximately 2 0 V and 2 0 V NOTE If no waveform is displayed check the vertical coupling to be sure that it is set to 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 Q If the probe does not pass this functional check go to Troubleshoot ing on page 59 P6249 A GHz 5X Active Probe Instruction Manual Functional Check 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 probes are connected Bu P6249 probe n ND
8. interface 37 Figure 12 Setup for output zero and DC attenuation accuracy 41 Figure 13 Test system rise line Sebup q4 Figure 14 Test system and probe rise time setup 45 Figure 15 P6249 adjustment locations 49 Figure 16 1103 power supply offset voltage location 51 Figure 17 P6249 offset range setup 52 Figure 18 Replacing TEKPROBE interface pins 53 Figure 19 Removing the compensation box covers 54 Figure 20 Replacing the compensation box cover 55 Figure 21 Replacing the TEKPROBE interface collar 56 Figure 22 Compensation box test point locations 60 Figure 23 P6249 replaceable parts 65 Figure 24 P6249 standard accessories 66 Figure 25 P6249 optional accessories 68 P6249 4 GHz 5X Active Probe Instruction Manual ili Table of Contents iv P6249 A GHz 5X Active Probe Instruction Manual CT vv General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only gualified personnel should perform service procedures To Avoid Fire or Personal Injury Connect and Disconnect Properly Connect the probe output to the measurement instrument before connecting the probe to
9. option 1 1 800 833 9200 select option 2 Email techsupport tektronix com 1 800 833 9200 select option 3 6 00 a m 5 00 p m Pacific time 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 Product Description 4 P6249 4 GHz 5X Active Probe Instruction Manual ww _ _ O 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 socket socket Stabilization notch Probe head assembly The probe head is designed for ease of use and high performance Its small size makes it easy to handle in tight areas The probe tip socket is sized to easily press onto 0 025 inch pins for direct access The ground socket provides a short ground path for high fidelity ground connections The stabilization notch permits you to use adjacent pins to reduce stresses on the probe and pins TEKPROBE Interface The TEKPROBE interface provides a communication path between the probe and the oscilloscope Contact pins provide power signal offset and probe characteristic data transfer See page 37 for more information If your oscilloscope does not su
10. 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 tool to open the other side of the compensation box 3 With both sides of the box open gently separate the two halves of the compensation box Optional release a V catches Figure 19 Removing the compensation box covers 54 P6249 4 GHz 5X Active Probe Instruction Manual Maintenance 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 pieces together until the cover catches snap into place Tabs 4 Figure 20 Replacing the compensation box cover P6249 4 GHz 5X Active Probe Instruction Manual 55 Maintenance Removing and Replacing the TEKPROBE Interface Collar To 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 To replace the interface collar first note the pin configuration on the compensation box and their holes in the interface collar The group of three pins fit through the smaller of the two holes in the interface collar See Figure 21 Align the tab to the slot and gently press the two pieces together See Figure 2
11. 1 Once installed the TEKPROBE interface collar should rotate freely to lock and unlock Slot Figure 21 Replacing the TEKPROBE interface collar 56 P6249 A GHz 5X Active Probe Instruction Manual Maintenance Inspection and Cleaning To 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 detergent and water solution or isopropyl alcohol Replacement Parts Refer to Replaceable Parts on page 63 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 If the original packaging is unfit for use or not available use the following packaging guidelines 1 Use a corrugated cardboard shipping carton having inside dimensions at least one inch greater than the probe dimensions The box should have a carton test strength of at least 200 pounds 2 Putthe probe into a plastic bag or wrap to protect it from dampness 3 Place the probe into the box and stabilize it with light packing material 4 Seal the carton with shipping tape P6249 4 GHz 5X Active Probe Instruction Manual 57 Maintenance 58 P6249 4 GHz 5X Active Probe Instruction Manual ww sas s a Troubleshooting This troubleshooting documentation de
12. 6 P6249 A GHz 5X Active Probe Instruction Manual Performance Verification 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 C DC attenuation accuracy NA I 2 96 Rise time P6249 4 GHz 5X Active Probe Instruction Manual 47 Performance Verification 48 P6249 4 GHz 5X Active Probe Instruction Manual ww sssVya 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 Refer to page 54 Use the optional adjustment tool for making any adjust ments Adjustment Locations Refer to Figure 15 for the location of the offset zero and offset range controls Offset zero Offset range adjust adjust Figure 15 P6249 adjustment locations P6249 4 GHz 5X Active Probe Instruction Manual 49 Adjustments 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
13. A Tektronix PS280 DMM 0 5 accuracy at 2 VDC Tektronix TX3 Feedthrough Termination 50 020 05 Q 011 0129 00 Sampling Oscilloscope Sampling Head TEKPROBE Power Supply Calibration Step Generator P6249 4 GHz 5X Active Probe Instruction Manual 39 Performance Verification Table 7 Equipment required for performance verification Cont Performance Item Description Reguirement Recommended Example BNC to BNC coaxial cable 50 Q coaxial cable 012 1342 00 Coaxial cable Male to Male SMA 20 in 174 1427 00 Precision coaxial cable Male to Male SMA 1 ns 015 0562 00 delay Adapter SMA Female to Female 015 1012 00 Adapters 2 SMA Female to BNC Male 015 0572 00 Adapter BNC Female to Dual 103 0090 00 Banana Adapter Y lead adapter 196 3457 00 Adapters 2 Klip Chip adapter 206 0364 00 Equipment Setup Use this procedure to set up the equipment to test the probe 1 Connect the probe to the oscilloscope 2 Connecta Y lead adapter with KlipChip adapters attached to the P6249 3 Turn on the oscilloscope and enable the channel 4 Allow 30 minutes for the equipment to warm up NOTE If your oscilloscope has a probe calibration routine run it before making any ofthe following checks However certain firmware versions of TDS series oscilloscopes will return a Probe Cal Failed message If this occurs see Probe Calibration Errors on page 16 for more information 40 P6249 4 GHz 5X Active Probe Instruction Manual Performance V
14. Active Probe Instruction Manual Operating Basics 1000 900 800 100 Frequency 600 MHz 500 400 300 200 100 0 1 12 14 16 18 2 22 24 26 28 3 Measurement lead length Inches 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 is the maximum circuit frequency which should be measured Using the graph shown in Figure 4 as a guide a 2 inch lead length yields a 500 MHz maximum frequency The low inductance ground contacts described in Accessories on page 5 can help you reduce the effects of ground lead inductance on your measurements P6249 4 GHz 5X Active Probe Instruction Manual 21 Operating Basics 22 P6249 A GHz 5X Active Probe Instruction Manual Z 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 of the package and connect 1t 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 23 Helpful Hints This method is very useful when making many measurem
15. DS 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 700 series oscilloscope is fully compatible with the P6249 probe do the following 1 Perform the Signal Path Calibration on the oscilloscope and wait for it to complete 2 Rerun the calibration routine on the P6249 probe 3 Ifthe oscilloscope returns the failure message again initialize the probe calibration and check probe offset zero m If offset zero is greater than 25 mV perform the Offset Zero adjustment on page 50 in the Adjustments section m If offset zero is less than 25 mV check the Offset Range as instructed on page 51 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 5 Ifthe problem persists there is a hardware fault Please contact your nearest Tektronix Service Center for more information P6249 4 GHz 5X Active Probe Instruction Manual 17 Functional Check 18 P6249 4 GHz 5X Active Probe Instruction Manual A 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 susce
16. Instruction Manual Tektronix P6249 4 GHz 5X Active Probe 071 0538 03 www tektronix com 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 TEKTRONIX TEK TEKPROBE and SureFoot are registered trademarks and SureToe FlexLead and KlipChip are trademarks of Tektronix Inc WARRANTY Tektronix 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 Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipm
17. LdO uonduos p 3 aueu St ZL A SOLL 00 8290 STO 006087 6 9 00 ESTT TOO A r4 r4 r4 CO EVT E00 NO juoosqg ou ped OU eues XIUOJPOL souossoooe jeuondo 6pcod SZ n Ou Xepult 2 By P6249 A GHz 5X Active Probe Instruction Manual 68 Replaceable Parts TOOO Z O 6 YO NO DAA V J4J apog diz ejeis O OOS XOA Od aa NAVYA THV2lAAS OSTVT SseJppy UFIANLOVANNVIN OL HQSSINCN 3OO090 HAN X3aNI SSOHO DNI XINOHDIAL 60008 69 P6249 4 GHz 5X Active Probe Instruction Manual Replaceable Parts 70 P6249 4 GHz 5X Active Probe Instruction Manual
18. OTICE OF THE POSSIBILITY OF SUCH DAMAGES Table of Contents General Safety Summary Service Safety Summary Product Description OptI BS PEN EEE REM ES X PME Standard Accessories Optional Accessories Contacting Tektronix Features and Accessories Configuration Probe Offset den Functional Check Deskew Fixture Probe Calibration Errors Check Compatibility Check for Hardware Problems Operating Basics Handling the Probe Maximum Non destructive Input Voltage Input Linear Dynamic Range Ground Lead Length Helpful Hints Low Inductance Grounding SureFoot Grounding Probe Tip Test Points P6249 4 GHz 5X Active Probe Instruction Manual Ww N 11 19 19 19 20 23 24 25 Table of Contents Specifications Theory of Operation Probe Head and Cable Assembly 36 Compensation BOX 36 Of set Amplifi pe i ou ra rx rasen 36 Probe Identification EEPROM 36 TERPROBE IMEa0E 69654254440 bei 37 VA V Regulator opeccebreore eee TERES QE VES 37 Performance Verification Equipment Required 4115595 RE RA EE Add EA 3 aqa 39 Equipment SEM a utn asm ares deh CS ades i era a ded a 40 Ont
19. Set the DC power supply using the DMM to 42 5 VDC 5 Observe the DC value on the DMM 6 Adjust Offset Range for a DMM reading of 0 V 5 mV Refer to Figure 15 on page 49 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 52 P6249 4 GHz 5X Active Probe Instruction Manual 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 interface If any pin fails to move freely and fully extend replace the pin To remove a TEKPROBE interface pin firmly grasp the pointed tip with pliers and pull the pin out of the connector See Figure 18 No tools are required to install a replacement pin Insert a new pin into the connector socket as far as possible using finger pressure If necessary seat the pin into the connector by pressing the tip gently but firmly against a hard surface such as a wood block or table top Figure 18 Replacing TEKPROBE interface pins P6249 4 GHz 5X Active Probe Instruction Manual 53 Maintenance Removing and Replacing the Compensation Box Covers Follow these steps to open the compensation box 1 Press the optional release
20. anual Features and Accessories SMT KlipChip Use the SMT KlipChip test clips 4 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 allowing better probe orientation To reduce stress and provide a lower profile on components being tested the flexible sleeve of the KlipChip bends up to a 35 degree angle SMK4 Micro KlipChip adapters Use the adapters to probe the leads on integrated circuits that are surface mounted Color marker bands Attach matching pairs of sy the color marker bands onto the cable at the head and compensation box of each probe The marker 2 bands enable quick verification of which probe is connected to which instrument channel P6249 4 GHz 5X Active Probe Instruction Manual 9 Features and Accessories 10 P6249 A GHz 5X Active Probe Instruction Manual ADS 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 Q and the coupling is set to DC CAUTION Do not attempt to install the P6249 on a non TEKPROBE A connector Damage to the probe and connector may result lf your oscilloscope does not support the TEKPROBE interface
21. assed 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 identification EEPROM Vec 7 V Regulator The 15 V input is regulated to 7 V to supply the IC Vcc Figure 11 shows the TEKPROBE interface pin functions Refer to your oscilloscope service documentation for more detailed specifications Figure 11 TEKPROBE interface P6249 4 GHz 5X Active Probe Instruction Manual 37 Theory of Operation 38 P6249 4 GHz 5X Active Probe Instruction Manual w hl h h Performance Verification 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 These procedures test the following specifications m Output offset voltage m DC attenuation accuracy m Rise time Equipment Required Refer to Table 7 for a list of the equipment required to verify the performance of your probe Table 7 Equipment required for performance verification Performance Item Description Requirement Recommended Example Oscilloscope TEKPROBE interface Tektronix TDS 694C Tektronix 11801 Tektronix SD24 Tektronix 1103 067 1338 0X Adapter Probe tip 015 0678 00 DC Power Supply 1 VDC at1 m
22. c OO0 60 0 TIO OO SIETL 9IO TOSAS COSAS 0SAS TOS IS OO VZLT 9TO OO EZLT 9TO OO ZZLT 9TO OE 8c9G TET O09GvE AGT ou ped iw epoo AN 6vc9d NOLLO CYHLSNEHO3 L Tr NMA dIHD dA LUNS LSSL _ID5IOOtIOIA 3SISIOtIid dLL Z JO DMdISAL _DIDOYDINNAOdd ALL SH TOD UWA VA ZONVA YDYN s ISIVO CGII LDI eS ZI JO DAd DAI MIN O0S LOOJHOS H L dv ZI JO DAd DITI MIN SC IOOd THr1S H Ldcv ZI JO DMd TIH NIN SOLOOJJHOS AI dl ZL JO 3ENDIOVd 3OLdH S dLL 38Oud OT JO 5 Id ONIHdS HaldvCOVv LDI AHOSSQOOV ST JO DMd dALdAVOV HLONII Nid CINO LDI AHOSS3OOV ST JO DMd NId ODOd LDI AUOSSFIIV CE JO H4DVADV d dlLl 4gOdd CIV31 VUNJAJJAC OWL OVJTONNOAD HONIO 33uH L TONI 1A AHOSS3OOVLS OVIT S3IHOSSHOOV AHVANVLS uonduos p 3 aueu GpEzL A r4 r4 r4 r4 r4 r4 r4 r4 A N r4 A No woosq an paya ou ELOS X 8ESO TLO OO VITO OT 00600 EIO OO STET 9TO TOSAS COSAS 0SAS TOSLS OO VZLT 9TO OO ZZ T 9IO OO CZ T 9IO OE 8c9G TET O09SvE AGT ou med xUOIPRL OU X DuII Du 67 P6249 4 GHz 5X Active Probe Instruction Manual Replaceable Parts OSANS 00 8290 STO 0060876 9 OO 8 ETL 00 COEEVT E00 ou ped iw CT Z S 33S OZ JO DMd diHD dI DI INS1 SAL DOO Ol NNOD Z LASAJO W Sd 41 JSHgOdMAL FUNUXI4 1S341 INHO OS O INI GA VNIANAL IZIS JOVdNOD Z VINSdLL ASOdd daldvCcNv NOLIVAAI TVO ASSVAAS AI DD AIVNOSavOX1Od XOH diNOD dAAOD TOOL 3S Td TOOL INaQlausn fav SHHOSSJDOV TWNOL
23. cursors are used on a TEKPROBE oscilloscope the zero reference will be at the probe offset voltage Nonoperating range 30 V maximum nondestructive input voltage 1 0 V 15 0 V 45 0 V ar 12 0 V 0 V4 Maximum AC signal amplitude Maximum offset range 2 0 V 5 0 V 7 0V an range 30 V maximum nondestructive input voltage Figure 1 Dynamic and offset limitations 12 P6249 A GHz 5X Active Probe Instruction Manual O Functional Check After installing the probe on the oscilloscope a functional check may be performed using the PROBE COMPENSATION connections on the front panel of the oscilloscope 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 Setthe oscilloscope to display the probe channel P6249 4 GHz 5X Active Probe Instruction Manual 13 Functional Check 3 If you have the optional deskew fixture connect it to the PROBE COMPENSATION 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 COMPENSATION ground connection on the oscilloscope 5 Using a standard tip hold the probe to the SIGNAL terminal on the oscilloscope 6 Adjust the oscilloscope to display a stable calibration waveform NOTE If your
24. ealed or located in clean rooms Pollution Degree 2 Normally only dry nonconductive pollution occurs Occasionally a temporary conductivity that is caused by condensation must be expected This location is a typical officelhome environment Temporary condensation occurs only when the product is out of service P6249 A GHz 5X Active Probe Instruction Manual 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 AU UN NN U AA NN w J a msESro 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 Probe head Probe tip l Probe tip amplifier Offset to probe Compensation box Oscilloscope Signal Out Probe ID Out EEPROM Offset ampifier Clock In 1V Offset Offset 5V 5V Probe cable Figure 10 P6249 simplified schematic diagram P6249 4 GHz 5X Active Probe Instruction Manual Ground TEKPROBE Interface 35 Theory of Operation Probe Head and Cable Assembly The probe head assembly contains a
25. eatures and Accessories Signal ground adapter U s FlexLead adapter 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 To attach the ground lead press and rotate the lead pin connector into the ground socket on the probe head 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 20 for more information Low inductance ground pogo pin Use the low inductance ground pogo pin to substantially reduce ground lead inductance Because the pogo pin simply touches the ground reference you can easily move the probe to diferent points on the circuit under test To attach press the pogo pin into the probe head ground socket When selecting the grounding connection maintain as shorta ground path as possible Refer to page 20 for more information Signal Ground Adapter The signal ground adapter is ideal for use with signal ground pairs on 0 100 inch header pins such as FlexLead adapters Attach the signal ground adapter by gently pressing it into the ground socket on the probe head Be sure to use the stabilization notch whenever possible to avoid slipping and damaging the probe or circuitry under test P6249 4 GHz 5X Active Probe Instruction M
26. ement parts Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc service center or representative Changes to Tektronix instruments are sometimes made to accommo date improved components as they become available and to give you the benefit of the latest circuit improvements Therefore when ordering parts it is important to include the following information in your order m Part number m Instrument type or model number m Instrument serial number m Instrument modification number if applicable If a part you order has been replaced with a different or improved part your local Tektronix service center or representative will contact you concerning any change in the part number P6249 4 GHz 5X Active Probe Instruction Manual 63 Replaceable Parts Using the Replaceable Parts List 64 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 Parts List an Item Name is separated from the description by a colon Because of space limitations an Item Name may sometimes appear as incomplete For further Item Name identification U S Federal Cataloging Handbook H6 1 can be used where possible Indentation System This parts list is indented to show the relationship between items The
27. ent 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 This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improper use or connection to incompatible equipment c to repair any damage or malfunction caused by the use of non Tektronix supplies or d to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE N
28. ents 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 24 If you cannot use the recommended low inductance grounding method you may ground the probe to the package under test using a SureFoot adapter Refer to Figure 6 Figure 6 Using a SureFoot adapter for 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 A GHz 5X Active Probe Instruction Manual Helpful Hints Probe Tip Test Points You 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 the probe head off when you are done The probe tip may be removed and reused by desoldering it from the circuit and soldering it into another circuit in the future Figure 7 Using a probe tip as a test point NOTE Do not use pieces of solid core copper wire be used as test points Ifthe 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 25
29. erification 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 the probe tip to the probe ground socket Connecting two KlipChip adapters together is recommended 4 Set the 1103 offset VAR OV to OV 5 Observe the multimeter display and record the results on the test record The displayed DC level should be 0 00 V 10 mV 1103 Digital multimeter Power Supply Power supply ER 500 Precision terminator BNC to Dual Banana Adapter Figure 12 Setup for output zero and DC attenuation accuracy P6249 4 GHz 5X Active Probe Instruction Manual 41 Performance Verification DC Attenuation Accuracy 42 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 1103 power supply 3 Set the 1103 offset VAR OV to OV 4 Set the multimeter to read DC volts 5 Connect the probe tip and ground to the power supply using the Y lead and KlipChip adapters 6 Allow 30 minutes for the eguipment to warm up Record the results of steps 7 through 10 separately Use the results to calculate the DC accuracy of the p
30. following example is of the indentation system used in the Description column 1 2 3 4 5 Name amp Description Assembly and or Component Attaching parts for Assembly and or Component END ATTACHING PARTS Detail Part of Assembly and or Component Attaching parts for Detail Part END ATTACHING PARTS Parts of Detail Part Attaching parts for Parts of Detail Part END ATTACHING PARTS Attaching parts always appear at the same indentation as the item it mounts while the detail parts are indented to the right 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 Replaceable Parts OO06 8L9TO OO TGTOSOZ ZOZZIE TET OO Cc90 0TO ou ped iw IANOJ A OLLSY Id 3b5EN HOLS 3SVO T OOG SL LO AFAD AAOO SS ONA NNOD DITA TIAHS T OO L6TO G0Z dLLGAIV ld TIOS IFTIFIIVLNOD T ZOZZIE TEL sardas SI 4dT XG ZH9 WOY 134 7IIO0Ud T OO Cc90 OTO uonduosep aueu stezi AWO woosq an paya ou ped ou IHS XRIOIPI L sued ojqeeoejdai GpZI9A z and T EZ OU X DUII 2 54 65 P6249 4 GHz 5X Active Probe Instruction Manual Replaceable Parts Figure 24 P6249 standard accessories 66 P6249 4 GHz 5X Active Probe Instruction Manual Replaceable Parts XXx 8ES0 TIZO OO r9 O0 90
31. illoscope vertical scale to 50 mV div 4 Set the oscilloscope horizontal scale to 100 ps div 5 Adjust the oscilloscope horizontal and vertical position controls to display a signal similar to that shown in Figure 13 BNC to SMA adapter 1103 Power supply Precision coaxial cable Calibration step generator Output o O ES Trigger Input Internal clock output Generator remote head Figure 13 Test system rise time setup 6 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 f The system rise time t that you measured in step 6 represents the rise time of the test system without the probe 44 P6249 4 GHz 5X Active Probe Instruction Manual Performance Verification 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 545 that you measure in step 12 is used to calculate the probe rise time f in step 13 7 Disconnect the calibration generator remote head from the 1103 power supply input Remove the SMA BNC adapter from the 1103 power supply input 8 Use the BNC locking ring to connect the probe to the 1103 power supply channel 1 input Disable the offset control on channel 1 of the 1103 power supply 9 Connect the probe tip adapte
32. n 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 buffering is performed in the probe head assembly No further amplification takes place in the compensation box Compensation Box 36 The compensation box contains the following circuits m Offset amplifier m Probe identification EEPROM m TEKPROBE interface m Vcc 7 V linear regulator Offset Amplifier The offset amplifier is used to offset the input signal DC component so that it stays at the optimal point of the probe linear dynamic range For more information on the linear dynamic range characteris tic refer to Input Linear Dynamic Range on page 19 The offset amplifier receives offset information as a 1 VDC voltage from the oscilloscope The amplfier then amplifies it to match the probe characteristics and applies it to the probe head circuit The offset amplifier has two adjustments offset zero and offset gain These adjustments rarely need attention however detailed adjustment instructions are in the Adjustment section on page 49 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 Theory of Operation the oscilloscope and information about the probe is p
33. nd Accessories Y lead SureToe probe tip The SureToe tip is a pointed probe tip useful for probing in dense circuitry Attach the SureToe 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 with any of the socketed accessory leads Right angle adapter Use the right angle adapter for low profile probing of 0 025 inch diameter square pins The right angle adapter allows the probe to lie flat against a circuit board This enables probing in vertical circuits such as computer or communica tions backplanes or in tight areas such as between circuit cards The right angle adapter can be used directly with the probe head or attached to the Y lead adapter or ground leads The right angle adapter is attached the same way as the push in probe tip and can be easily removed by hand Y lead adapter Use the Y lead adapter to extend the physical reach of the probe and ground when necessary The Y lead adapter accepts any of the probe tips or adapters and can be pushed directly onto 0 025 inch pins When selecting the grounding connection maintain as short a ground path as possible Refer to page 20 for more information To attach the Y lead adapter gently press the lead pins into the probe head tip and ground receptacles Using the black lead for ground is recommended P6249 4 GHz 5X Active Probe Instruction Manual 7 F
34. ng the P6249 probe m Option DI Calibration Data m Option C3 3 years Calibration Service m Option D3 3 years Calibration Data m Option R3 3 years Extended Warranty Standard Accessories The P6249 is shipped with the following standard accessories m Standard probe tips m SureFoot adapter probe tips m SureToe adapter probe tips m SMT KlipChip microcircuit test leads m Y lead adapter P6249 4 GHz 5X Active Probe Instruction Manual 1 Product Description m Right angle adapter m Three inch ground lead m Low inductance ground pogo pin m Color marker bands m SMK4 Micro KlipChip adapters m 100 square pin adapter m Instruction manual Optional Accessories The following accessories are available for the P6249 probe m Deskew fixture m Probe tip to SMA adapter m 1103 Probe Power Supply m Compensation box release tool m Insulated adjustment tool Refer to Features and Accessories on page 5 for more information on using the probe and accessories For part number information for standard and optional accessories refer to Replaceable Parts on page 63 2 P6249 4 GHz 5X Active Probe Instruction Manual Product Description Contacting Tektronix Phone Address Web site Sales support Service support Technical support 1 800 833 9200 Tektronix Inc Department or name if known 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA www tektronix com 1 800 833 9200 select
35. pport the TEKPROBE interface you can use the optional 1103 probe power supply as an effective interface Contact your local Tektronix representa tive for more information Push in probe tip Use the push in probe tip for general purpose probing by hand The tip may also be used as a temporary test point See page 25 for more information The push in probe tip may also be used with the other socketed leads and adapters P6249 4 GHz 5X Active Probe Instruction Manual 5 Features and Accessories 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 ofthe tip may be used Do not force the tip Also be careful notto poke yourself with the sharp probe tip To remove the tip gently grab the tip with small pliers and pull the tip out SureFoot probe tip The SureF oot tip is an integral probe tip and miniature guide that enables fault free probing of fine pitch SMD packages Attach SureF oot adapters the same way as the push in probe tips They can be used with any of the socketed accessory leads The orange 0 050 inch SureF oot tip is compatible with 50 mil EDEC packages such as SOIC PLCC CLCC etc The blue 0 025 inch SureF oot tip is compatible with 0 65 mm J EDEC and EIA packages The red 0 5 mm SureFoot tip is compatible with EIAJ packages 6 P6249 4 GHz 5X Active Probe Instruction Manual Features a
36. ptible 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 Visible dents in the cable will increase signal aberrations Do not drop the probe or subject it to physical shock Damage to the probe may result Maximum Non destructive Input Voltage The P6249 is electrically protected against static voltage however applying voltages above its design limits may damage the probe tip amplifier Please refer to Specifications on page 27 for the maximum operating voltage and frequency derating information Input Linear Dynamic Range The probe head amplifier used by the P6249 has a limited linear operating range To keep the input linearity error less than 0 1 you must limit the apparent signal input voltage to 2 0 V Use the DC offset adjustment to maintain the probe within its dynamic range The nominal offset adjustment range of the P6249 is 5 0 VDC For example to offset a 2 VDC level in a circuit set the offset to 2 V NOTE The probe can tolerate input voltages of 30 V without damage however the linearity error specification does not apply to input voltages exceeding 7 0 V including any DC offset See Figure on page 12 P6249 4 GHz 5X Active Probe Instruction Manual 19 Operating Basics Ground Lead Length 20 When you are probing a circuit you should always use as sho
37. put Ze us asss tie nha ns du RV E WT TENUERE 41 DC Attenuation Accuracy 42 Rise Time RTI 44 Adjustments Ad nsument Locations 220592 3 a rk e wee thread 49 Offset Zei0 sanieren 50 Offset Range nee gesendet 51 Maintenance Replacing TEKPROBE Interface Pins 53 Removing and Replacing the Compensation Box Covers 54 Removing and Replacing the TEKPROBE Interface Collar 56 Inspection and Cleaning aaa 57 Replacement Parts janskega ra AX eher es 57 Preparation for ShIpim nt oa ary ara 57 Troubleshooting Replaceable Parts Parts Ordering Information ssec vex or cepere REY ae EN 63 Using the Replaceable Parts List 64 ii P6249 4 GHz 5X Active Probe Instruction Manual Table of Contents 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 Figure 4 Maximum freguency vs measurement lead length 21 Figure 5 Low inductance grounding 23 Figure 6 Using a SureFoot adapter for grounding 24 Figure 7 Using a probe tip as a test point 25 Figure 8 Typical input impedance and phase versus frequency 28 Figure 9 Typical bandwidth 29 Figure 10 P6249 simplified schematic diagram 35 Figure 11 TEKPROBE
38. r to the calibration step generator remote head using the SMA female female adapter Insert the probe tip into the probe tip adapter P6249 P robe inat 1103 Power supply 2 SE i BNC to SMA Output Input Probe tip adapter adapter Pa l5 Precision yo Generator remote head coaxial cable Calibration step generator Internal Trigger input clock output Figure 14 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 11 Adjust the oscilloscope horizontal and vertical position controls to display a signal similar to that shown in Figure 14 P6249 4 GHz 5X Active Probe Instruction Manual 45 Performance Verification NOTE Do not touch the probe tip adapter when making calibration measurements Measurement accuracy is degraded when the probe tip adapter is handled 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 f 4 p 13 Calculate the probe only rise time using the following formula 2 2 tp s t 14 Check that the calculated rise time meets the probe specification The rise time f must be lt 120 ps 15 Record the results on the test record 4
39. robe in step 11 7 Set the power supply to 1 000 V Record the power supply output as Vmax 8 Measure and record the multimeter reading as MI 9 Set the power supply to 1 000 V Record the power supply output as Vmin 10 Measure and record the multimeter reading as M2 NOTE If you are unable to set the power supply precisely record the actual readings and determine the absolute difference 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 A GHz 5X Active Probe Instruction Manual Performance Verification 11 Determine the percent error by using the formula below Error Guru 1 x 100 The calculated error should be lt 2 12 Record the results on the test record NOTE An unaceceptable error value may result if a low tolerance termination is substituted for the recommended termination P6249 4 GHz 5X Active Probe Instruction Manual 43 Performance Verification 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 Figure 13 2 Setthe oscilloscope trigger to Internal clock 3 Turn on channel 1 on the SD 24 and then set the osc
40. rt 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 circuit This represents the characteristics of your probe and ground lead You can determine if ground lead effects may be a problem in your application if you know the self inductance L and capacitance C of your probe and ground lead path A portion of the ground lead path is uncontrollable since it is hard wired on the circuit board under test Asa guide refer to Figure 4 to estimate the maximum frequency you can measure using additional lead length The total inductance can be calculated with reference to the measurement loop area formed by the ground lead path using the following formula L A A Measurement loop area in square inches 113 L Inductance in microhenries Once you have calculated the inductance use 1 picofarad for the capacitance of the P6249 and calculate the approximate resonant frequency fo at which this parasitic circuit will resonate using the following formula 1 2x LC The preceding equation shows that reducing the ground lead inductance will raise the resonant frequency If your measurements are affected by ringing your goal is to lower the inductance of your ground path until the resulting resonant frequency is at least 3 times greater than the frequency of your measurements P6249 A GHz 5X
41. t termination to nonlinear signal to 50 Q termination 50 Q or install a feedthrough termination at the instrument input Continue 60 P6249 4 GHz 5X Active Probe Instruction Manual Troubleshooting Table 8 Troubleshooting guide Cont Symptom Distorted or nonlinear signal No Offset Adjust Signal present Probe Power Cms Ra Is the signal within linear dynamic range See page 19 Go to Probe Power row Probe power OK Check variation of offset input from host instrument See Figure 22 Signal should vary between 1 V and 1 V Offset input OK Offset input bad Power OK Check the power test points in the compensation box See Figure 22 Power bad P6249 4 GHz 5X Active Probe Instruction Manual Action Set channel vertical offsetto match signal characteristic Continue checks Replace probe Check TEKPROBE interface pins on the compensation box See page 53 Check TEKPROBE interface on host instrument Try an adjacent channel Repair host instrument Continue checks Check TEKPROBE interface pins on the compensation box See page 53 Check TEKPROBE interface on host instrument Try an adjacent channel Repair host instrument 61 Troubleshooting 62 P6249 A GHz 5X Active Probe Instruction Manual w m 555855 Replaceable Parts This section contains a list of replaceable parts for the P6249 Use this list to identify and order replac
42. tails isolation to either the probe or the oscilloscope 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 16 To troubleshoot the P6249 the probe must be attached to an operating TEKPROBE interface oscilloscope with the top cover of the compensation box removed Refer to page 54 for instructions on opening the compensation box The oscilloscope should be set to the following settings m 50 Q termination at instrument m DC coupling CAUTION Observe caution when probing in the compensation box Operating voltages will be present Be careful not to touch or ground energized components Work at a Level 1 ESD workstation when performing trouble shooting The compensation box contains static sensitive devices P6249 4 GHz 5X Active Probe Instruction Manual 59 Troubleshooting Refer to Table 8 for troubleshooting procedures and Figure 22 for troubleshooting test points Offset zero Offset range adjust adjust 000000 5 Ground 5 Offset Red Black White Blue Figure 22 Compensation box test point locations Table 8 Troubleshooting guide No Signal Out Check known signal No signal Continue checks Go to Probe Power Probe power OK Replace probe Distorted or Is the instrument set Se
43. the circuit under test Disconnect the probe input and the probe ground from the circuit under test before disconnecting the probe from the measure ment instrument Observe All Terminal Ratings To avoid fire or shock hazard observe all ratings and markings on the product Consult the product manual for further ratings information before making connections to the product Connect the ground lead of the probe to earth ground only Do Not Operate Without Covers Do not operate this product with covers or panels removed Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by gualified 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 V General Safety Summary vi 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 identify conditions or practices that could result in damage to this product or other property Terms on the Product These terms may appear on the product DANGER indicates an injury hazard immediately accessible as you read the marking WARNING indicates an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard
44. to property including the product Symbols on the Product These symbols may appear on the product A CAUTION Referto Manual P6249 4 GHz 5X Active Probe Instruction Manual o Service Safety Summary Only gualified 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 capable of rendering first aid and resuscitation is present P6249 4 GHz 5X Active Probe Instruction Manual vii Service Safety Summary viii P6249 4 GHz 5X Active Probe Instruction Manual w Z l l h hl i 588 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 The accessory tips and adapters included with the probe enable the P6249 to be used on a wide variety of circuit architectures The P6249 is powered through a TEKPROBE interface between the probe compensation box and the oscilloscope The P6249 can be used with non TEKPROBE oscilloscopes and instruments by using the optional Tektronix 1103 Probe Power Supply Options The following options are available when orderi
45. 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 2 termination at the oscilloscope Also set the oscilloscope channel coupling to DC The probe offset control is controlled by the oscilloscope If the oscilloscope used does not support the TEKPROBE interface use the offset controls on the optional Tektronix 1103 Probe Power Supply Probe Offset The probe offset is adjustable to permit operation within the linear range of the probe Using the offset to cancel DC signal components enables optimal probe performance See Figure 1 on page 12 for more information NOTE See your oscilloscope manual for specific instructions on its operation and offset control P6249 4 GHz 5X Active Probe Instruction Manual 11 Configuration To set the probe offset follow these steps 1 2 Set the oscilloscope coupling to GND Use the vertical position control to set a zero reference level on the oscilloscope display Set the oscilloscope coupling to DC and 5 V div Attach the probe to the circuit Adjust the probe offset to bring the trace to the oscilloscope zero reference 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 19 for more informa tion If
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