P7260 6 GHz 5X/25X Active Probe Service Manual
Contents
1. Use the performance verification procedures to verify the warranted specifica tions of the P7260 probe The recommended calibration interval is one year The performance verification procedures check the following specifications at 5X and 25X attenuation m Output Zero m DC Gain Accuracy m Small Signal Risetime P7260 6 GHz 5X 25X Active Probe Service Manual 1 Description Equipment Required Refer to Table 1 for the equipment required to perform the service procedures Table 1 Equipment required for performance verification Item description Sampling Oscilloscope Performance requirement 212 5 GHz bandwidth 212 5 GHz bandwidth Recommended example Tektronix TDS8000 Tektronix 80E0X with 012 1568 00 cable Sampling module head with extension cable TekConnect Interface Oscilloscope Tektronix TDS6604 TekConnect calibration adapter TekConnect Interface 067 0422 XX Calibration Step Generator 250 mV step lt 30 ps rise time 067 1338 XX Adapter TekConnect to SMA TCA SMA Adapter Fixture Probe Calibration 067 1456 XX DC Power Supply 1 VDC at 1 mA Tektronix PS280 DMM 2 with leads 0 05 accuracy 0 1 mV resolution Fluke 87 or equivalent Feedthrough Termination 50 Q 0 05 Q 011 0129 XX BNC to BNC coaxial cable 50 Q coaxial cable 012 0057 01 Coaxial cable Male to Male SMA 012 0649 XX Adapter SMA Male to Male 015 1011 XX Adapter SMA Female to Female 015 1012 XX Adapter SMA Male to BNC Female2. Oscilloscope Osoe O E on QAQ m le oo0 0 0 00e SMA gt Sampling head M to M extender cable adapter TekConnect P7260 probe tip 80E0X calibration adapter a 50 amp 2 terminator 4 ge Probe calibration fixture H kee aa SMA F to F adapter ian P7260 probe E Wr Generator remote head CSAgooo TDSso00 COMP box r ko Le d l O L 5 O O Internal clock output Figure 9 Test system and probe rise time setup Calibration step generator jee SMA cable Trigger input 4 Set the step generator control switch to on 5 Repeat the steps 6 through 11 at each attenuation setting 5X and 25X NOTE To change attenuation settings while performing verification checks use the TekConnect Performance Verification application see page 10 for instruc tions 6 On the TDS8000 expand the horizontal scale to locate the step edge a Set the vertical scale to e 10 mV division for the probe set to 5X attention e 2 mV division for the probe set to 25 attention b Adjust horizontal range to 100 ps division while maintaining the edge view c For amore stable measurement display turn averaging on P7260 6 GHz 5X 25X Active Probe Service Manual Performance Verification 7 Adjust the TDS8000 horizontal and vertical position controls to
3. channel you have connected to on the 80EOX sampling head and then set the oscilloscope vertical scale to 50 mV division NOTE The output of the step generator rises from a 250 mV level to ground 4 Adjust the oscilloscope horizontal and vertical position controls to display a signal similar to that shown in Figure 8 on page 14 5 Set the oscilloscope horizontal scale to 50 ps div and center the waveform 6 Use the oscilloscope measurement capability to display rise time Increase the stability of the pulse edge measurement by using averaging if available Rise time is determined from the 10 and 90 amplitude points on the waveform Record the rise time as k The system rise time f that you measured in step 6 represents the rise time of the test system without the probe Test System with Probe After you assemble the test setup that includes the probe as shown in Figure 9 on page 16 you will measure the system and probe rise time ts p in step 8 This is used to calculate the probe rise time t in step 9 1 Set the step generator control switch to standby 2 Remove the TekConnect SMA adapter from the test setup 3 Connect the test setup as shown in Figure 9 on page 16 when connecting and disconnecting the female to female SMA adapter A CAUTION To prevent damaging the SMA connectors use a 7 32 inch wrench P7260 6 GHz 5X 25X Active Probe Service Manual 15 Performance Verification 16 TDS6604
4. display a signal similar to that shown in Figure 9 on page 16 NOTE Do not touch the probe tip adapter when making calibration measure ments Measurement accuracy is degraded when the probe tip adapter is handled 8 Use the TDS8000 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 f54p 9 Calculate the probe only rise time using the following formula th ae E iE 10 Check that the calculated rise time meets the probe specification The rise time t must be a lt 75 ps for the 5X attenuation setting b lt 85 ps for the 25X attenuation setting 11 Record the results on the test record P7260 6 GHz 5X 25X Active Probe Service Manual 17 Performance Verification Test record Probe Model Serial Number Certificate Number Temperature RH Date of Calibration Technician Performance test Output zero voltage at 5X 10 mV error at probe output 10 mV 20 C to 30 C Output zero voltage at 25X 10 mV error at probe output 10 mV 20 C to 30 C DC Gain attenuation accuracy at 5X lt 2 error DC Gain attenuation accuracy at 25X lt 4 error Rise time at 5X error Rise time at 25X error 18 Mini mum 10 mV 10 mV 196 mV 38 4 mV N A N A P7260 6 GHz 5X 25X Active Probe Service Manual Incom ing Outgo ing Maxi mum 10 mV
5. 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 Connect and Disconnect Properly Connect the probe output to the measurement instrument before connecting the probe to the circuit under test Disconnect the probe input and the probe ground from the circuit under test before disconnecting the probe from the measurement 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 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 qualified service personnel Do Not Operate in Wet Damp Conditions Do Not Operate in an Explosive Atmosphere Keep Product Surfaces Clean and Dry 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 indicat
6. 015 1018 XX Adapter BNC Female to Dual Banana 103 0090 XX Adapter Y lead adapter 196 3434 XX Adapter Square Pin adapter 016 1910 XX Adapters 2 SMT KlipChip adapter 206 0364 XX SMA torque wrench 5 16 in 7 in lb SMA adapter wrench 7 32 in Test leads 2 Banana Plug to Banana Plug Red 012 0031 XX Test leads 2 Banana Plug to Banana Plug Black 012 0039 XX P7260 6 GHz 5X 25X Active Probe Service Manual Description Special Adapters Required TekConnect to SMA Adapter Probe Calibration Fixture P7260 6 GHz 5X 25X Active Probe Service Manual Some of the adapters listed in Table 1 are custom made and available only from Tektronix The adapters are described on the following pages The TekConnect to SMA Adapter Tektronix part number TCA SMA allows signals from an SMA cable or probe to be connected to a TekConnect input See Figure 1 Connect and disconnect the adapter the same way as you do the P7260 Probe Figure 1 TekConnect to SMA adapter The probe calibration fixture Tektronix part number 015 1456 XX provides a low noise method for connecting the P7260 to signals present on SMA cables The adapter has a test point for the probe and two SMA connectors A 50 Q termination is included with the adapter and is connected to the SMA connector nearest the probe test point to minimize reflections Connect the cable from the test circuit to the other SMA connector This fixture includes a probe holder that works to secure
7. 10 mV 204 mV 41 6 mV lt 75 ps lt 85 ps
8. Advanced Test Equipment Rentals A ished 1981 www atecorp com 800 404 ATEC 2832 Service Manual Tektronix P7260 6 GHz 5X 25X Active Probe 071 1113 00 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service www tektronix com HNN AM A A A 071111300 Copyright Tektronix Inc All rights reserved Licensed software products are owned by Tektronix or its suppliers and are protected by United States copyright laws and international treaty provisions Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 or subparagraphs c 1 and 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 as applicable 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 TEK TekConnect and KlipChip are registered trademarks of Tektronix Inc a 7 General Safety Summary To Avoid Fire or Personal Injury Symbols and Terms A A Review the following safety precautions
9. P7260 Performance Yerification P7260 067 0422 00 BQoo001 ESEESE 1 04 P7260 Attenuation Status Switching probe to 3 Figure 5 TekConnect Performance Verification dialog box P7260 6 GHz 5X 25X Active Probe Service Manual 9 Performance Verification Changing Attenuation for Use the Performance Verification application to change the attenuation setting of Performance Verification the P7260 while performing the tests Keep the Performance Verification dialog box open while you are performing the Performance Verification procedures To change the attenuation setting of the probe click on the button of the attenuation setting you want to use To close the P7260 Performance Verification screen click the Exit button To close the TekConnect Adjustment application click Exit again 10 P7260 6 GHz 5X 25X Active Probe Service Manual Performance Verification Output Zero Use this procedure to verify the probe output zero Perform this test at the 5X attenuation setting of the probe and then test again at the 25X attenuation setting Use the same test equipment setup for both tests 1 Connect the test equipment as shown in Figure 6 below Short the probe leads together by connecting the KlipChip adapters together Digital TDS6604 Oscilloscope multimeter o en j o Set offset switch asas to GND S i lle ooo 0 0 O E Es BNC to Dual KlipChip Y lead ee ad
10. apters Square pin banana adapter 50 Q precision P adapter adapter terminator TekConnect ae calibration adapter 7S P7260 BNC cable probe head mine BNC SMA P7260 probe adapter compensation box Figure 6 Setup for output zero 2 For each P7260 attenuation setting 5X and 25X repeat steps 3 through 5 NOTE To change attenuation settings while performing verification checks use the radio buttons on the TekConnect Performance Verification dialog box see page 10 for instructions 3 Set the offset switch on the calibration adapter to GND NOTE Leave the offset switch in the ground position for all of the performance verification checks 4 Ground the probe tip by connecting the probe tip to the probe ground socket Connecting two KlipChip adapters together is recommended 5 Observe the multimeter display and record the results on the test record For both 5X and 25X attenuation the DC level should be 0 000 V 10 mV P7260 6 GHz 5X 25X Active Probe Service Manual 11 Performance Verification DC Gain Accuracy Perform this test at the 5X attenuation setting of the probe and then test again at the 25X attenuation setting Use the same test equipment setup for both tests 1 Disconnect the KlipChip adapters and connect the probe input to the DC source as shown in Figure 7 below Monitor the source voltage with the digital multimeter DMM 1 DMM 1 Vin Power supp
11. ers link b Select the Accessories link and then click on TekConnectAdjustSetup exe 2 On the host instrument open the file TekConnectAdjustSetup exe To install the application follow the instructions that the Install Shield Wizard provides 3 When installation is complete go to Start Programs Tektronix gt TekConnect Adjust Then open TekConnectAdjustSetup exe 4 After the application opens the TekConnect Adjustment Application dialog box appears see Figure 4 TekConnect Adjustment Application 1 1 Tektronix Instructions Probe Type to Adjust Channel to Use T Figure 4 TekConnect Adjustment Application dialog box 8 P7260 6 GHz 5X 25X Active Probe Service Manual Performance Verification 5 Make the following selections in the TekConnect Adjustment Application dialog box a From the Probe Type to Adjust list select P7260 b From the Channel to Use list select the oscilloscope channel where the probe is connected c From the Task to Perform list select Performance Verification 6 Click the Continue button The P7260 Performance Verification dialog box appears see Figure 5 on page 9 NOTE An error message appears if one of the following conditions exists A probe is not connected to the adapter m A probe model other than a P7260 is connected to the adapter m The P7260 that is connected to the adapter is defective unable to properly communicate with the adapter
12. es an injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product P7260 6 GHz 5X 25X Active Probe Service Manual i General Safety Summary Symbols on the Product The following symbols may appear on the product A CAUTION Refer to Manual ii P7260 6 GHz 5X 25X Active Probe Service Manual E 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 capable of rendering first aid and resuscitation is present P7260 6 GHz 5X 25X Active Probe Service Manual iii Service Safety Summary iv P7260 6 GHz 5X 25X Active Probe Service Manual SS y Preface This is the service manual for the P7260 6 GHz Active Probe Read this preface to learn how this manual is structured and where you can find other information related to servicing this product This manual is available as a printable pdf file on our website at www tektronix com Select the Software and Drivers link located on the home page Manual Structure This manual contains two sections Description and Performance Verification and is intended to be used by qualified service personnel Replaceable parts are limited to accessories and adapters and are described i
13. ly TDS6604 Oscilloscope f es P7260 probe head oy Red SY lo coo Cos Black DMM 2 Vout Square pin adapter lt P7260 CH1 Y lead adapter comp box input nee TekConnect gt S Female BNC to male ca ranon eas adapter z AA banana adapter P lt _ a adapter 50 Q precision terminator 50 Q BNC cable Figure 7 DC Gain Accuracy setup 2 Repeat the steps 3 through 8 at each attenuation setting SX and 25X NOTE To change attenuation settings while performing verification checks use the radio buttons on the TekConnect Performance Verification dialog box see page 10 for instructions 3 Set the input voltage on the DC source to approximately 0 5 V Record the actual voltage measured on DMM 1 as Vin1 4 Record the output voltage as measured on DMM 2 as Voutl 5 Set the input voltage on the DC source to approximately 0 5 V Record the actual voltage measured on DMM 1 as Vin2 12 P7260 6 GHz 5X 25X Active Probe Service Manual Performance Verification 6 Record the output voltage measured on DMM 2 as Vout2 7 Calculate the gain as follows Voutl Vout2 Vinl Vin2 8 Verify that the gain is a 0 2 2 for the 5X attenuation setting b 0 04 4 for the 25X attenuation setting Record the results on the test record NOTE An
14. ly hold the probe on the test point See Figure 2 on page 4 NOTE When taking measurements do not touch the probe tip adapter Measure ment accuracy is degraded when the probe tip adapter is handled Description Probe holder SMA connector for test circuit Figure 2 Probe calibration fixture 4 P7260 6 GHz 5X 25X Active Probe Service Manual Description TekConnect Interface The TekConnect Interface Calibration Adapter Tektronix part number Calibration Adapter 067 0422 XX connects between the host instrument and the probe under test and provides connectors for probe signal and offset voltage measurements See Figure 3 Figure 3 TekConnect Interface Calibration Adapter When the adapter is connected to the oscilloscope the adapter is identified as a valid calibration device However additional power supplies necessary to power the probe are not enabled until a TekConnect probe is connected to the adapter and identified by the oscilloscope When a probe is detected through the adapter the Volts division readout on the oscilloscope displays Refer to Table 2 on page 6 for features of the calibration adapter P7260 6 GHz 5X 25X Active Probe Service Manual 5 Description Table 2 TekConnect Interface Calibration Adapter features Feature Description Latch button atch Latch button The spring loaded latch mechanically retains the adapter to the oscilloscope To release the adapter grasp the adap
15. n the User Manual that is shipped with the probe Be sure to read the introductions to all procedures These introductions provide important information needed to do the service correctly safely and efficiently Related Documentation The probe is shipped with the following manual m P7260 6 GHz 5X 25X Active Probe User Manual Tektronix part number 071 0922 XX P7260 6 GHz 5X 25X Active Probe Service Manual vV Preface Contacting Tektronix vi 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 option 1 1 800 833 9200 select option 2 Email support 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 P7260 6 GHz 5X 25X Active Probe Service Manual y Description This document describes the Performance Verification procedures for the P7260 6 GHz 5X 25X Active Probe There are no user replaceable parts inside the probe If the probe fails the performance verification procedure contact your Tektronix service center Performance Verification
16. p into the ground terminal available on your host instrument or static approved workstation Use this procedure to set up the equipment before testing the probe Refer to the list of required equipment in Table 1 on page 2 1 Connect the probe calibration adapter to the oscilloscope 2 Connect the probe to the probe calibration adapter 3 Turn on the oscilloscope and enable the channel 4 Verify that the Volts division readout on the oscilloscope channel displays the oscilloscope recognizes the probe through the adapter A Set the multimeter to read DC volts 6 Allow 30 minutes for the equipment to warm up NOTE To avoid corrupted test results do not disconnect the probe under test or the probe calibration adapter until you have completed the service procedures If the probe or adapter are disconnected before completing the procedures you must reconnect the probe and adapter and exit and restart the application P7260 6 GHz 5X 25X Active Probe Service Manual 7 Performance Verification Using the Performance Verification Application While the test equipment is warming up load the TekConnect Performance Verification application onto your host instrument or verify that you already have the latest version of the application on your host instrument 1 Access the Tektronix Website at www Tektronix com and then download the application a On the Tektronix website home page select the Software amp Driv
17. ter housing depress the latch button and pull the adapter straight out of the oscilloscope Offset output select switch The offset output switch selects between ground and the offset Offset switch voltage level from the oscilloscope Q gt Leave the switch in the ground position for the performance verification procedures VAR Move the switch to the variable position for the adjustment procedures GND Offset Offset voltage The offset voltage of the probe is accessed through the BNC connector voltage output Measure the offset voltage using a DVM BNC coaxial cable and BNC to dual banana jack Signal out The SMA connector on the rear of the box allows for direct monitoring of the probe signal 6 P7260 6 GHz 5X 25X Active Probe Service Manual en aaa Performance Verification ha Equipment Setup Use the following procedures to verify the warranted specifications of the P7260 probe Before beginning these procedures refer to page 18 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 at 5X and 25X m Output Zero m DC Gain Accuracy m Small Signal Risetime Electrostatic Discharge ESD The P7260 is sensitive to electrostatic discharge To prevent electrostatic damage when handling the probe always wear an anti static wrist strap provided with your probe and plug the wrist stra
18. unacceptable error value may result if a low tolerance termination is substituted for the recommended termination P7260 6 GHz 5X 25X Active Probe Service Manual 13 Performance Verification Rise Time 14 This procedure verifies that the probe meets rise time specifications The probe rise time is calculated using rise times measured from the test system separately and the test system including the probe Test System Only 1 Connect the test equipment as shown in Figure 8 below The TDS6604 oscilloscope is only used to power the TekConnect adapter and probe All settings that follow apply to the CSA8000 TDS8000 CAUTION To prevent damage use care when working with SMA connectors support equipment to avoid mechanical strain on the connectors and use a torque wrench when tightening connections TDS6604 Oscilloscope B llo o 0 0 00 EZI le SM TekConnect Sampling head to M calibration adapter extender cable adapter TekConnect to Calibration 80E0X SMA adapter step generator Generator CSA8000 TDS8000 remote head Trigger input SMA cable Internal clock output Dii Figure 8 Test system rise time setup P7260 6 GHz 5X 25X Active Probe Service Manual Performance Verification 2 Set the oscilloscope trigger to internal clock 3 Select the
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