P7225 2.5 GHz Active Probe Service Manual
Contents
1. NOTE Do not touch the probe tip adapter when making calibration measure ments Measurement accuracy is degraded when the probe tip adapter is handled 13 Use the measurement capability of the measurement instrument to display rise time Rise time is determined from the 10 and 90 amplitude points on the waveform Record the rise time as ts p P7225 2 5 GHz Active Probe Service Manual 13 Peformance Verification 14 Calculate the probe only rise time using the following formula th V tesa st Example tp v135 35 18225 1225 v17000 130 4 15 Record the results in the test record on page 15 and compare the results against the rise time f specification on page 15 14 P7225 2 5 GHz Active Probe Service Manual Peformance Verification Table 3 Test record Probe Model Serial Number Certificate Number Temperature RH Date of Calibration Technician Performance test Output zero voltage at probe output 10 mV 20 C to 30 C DC attenuation accuracy error Rise time P7225 2 5 GHz Active Probe Service Manual Minimum Incoming Outgoing Maximum PU mm 10 mV 15 Peformance Verification 16 P7225 2 5 GHz Active Probe Service Manual2. rise time f in step 14 7 Set the step generator control switch to standby 8 Remove the TekConnect SMA adapter from the test setup 9 Connect the test equipment as shown in Figure 7 on page 13 CAUTION To prevent damaging the SMA connectors use a 7 32 inch wrench when connecting and disconnecting the female to female SMA adapter P7225 2 5 GHz Active Probe Service Manual Peformance Verification TDS7254 Oscilloscope e o o o o 0 o 9 9 SMA Sampling head M to M extender cable adapter TekConnect staj BDEOX ve calibration A 50 Q Termination adapter E ge Probe tip adapter p SMA F to F adapter E wee Generator remote head j P7225 CSA8000 TDS8000 Calibration step generator se SMA cable 000000009 00 o 000 Trigger input Internal clock output Figure 7 Test system and probe rise time setup 10 Set the step generator control switch to on 11 On the measurement instrument expand the horizontal scale to locate the step edge Set the vertical scale to 5 mV div and adjust horizontal range to 100 ps div while maintaining the edge view For a more stable measurement display turn on averaging 12 Adjust the measurement instrument horizontal and vertical position controls to display a signal similar to that shown in Figure 7
3. Service Manual Tektronix P7225 2 5 GHz Active Probe 071 1186 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 UOT AN UN O T T TIT 071118600 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 TEKPROBE SureFoot and KlipChip are registered trademarks of Tektronix Inc SureToe TekConnect TEKPROBE and KlipChip are trademarks of Tektronix Inc CA S NE Table of Contents General Safety Summary e ee iii Service Safety Summary 0 cece ee v Pr facen enc
4. Service Manual 9 Peformance Verification 7 Determine the percent error by using the formula below M1 M2 1 x 100 VERO Vmax Vmin x 1 Example _ 0 1014 0 1010 m Error 1 007 0 998 x T 1 x 100 0 2024 _ 02005 X 100 1 0097 1 x 100 0 95 8 Record the results in the test record on page 15 and compare the results against the DC attenuation accuracy error specification on page 15 NOTE An unacceptable error value may result if a precision 50 Q terminator is not used for the recommended termination Rise Time 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 1 Connect the test equipment as shown in Figure 6 on page 11 CAUTION To prevent damage use care when working with SMA connectors support equipment to avoid mechanical strain on the connectors and when tightening connections use a torque wrench to 7 5 in lbs 10 P7225 2 5 GHz Active Probe Service Manual Peformance Verification NOTE The TDS7254 powers the TekConnect Calibration adapter and the P7225 Any instrument adjustments in this procedure are made on the CSA8000 TDS8000 TDS7254 Oscilloscope TekConnect Sampling head Peay calibration adapter extender cable ad
5. anual AA E 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 While using this product you may need to access other parts of the system Read the General Safety Summary in other system manuals for warnings and cautions related to operating the system To Avoid Fire or Connect and Disconnect Properly Do not connect or disconnect probes or test Personal Injury leads while they are connected to a voltage source 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 apply a potential to any terminal including the common terminal that exceeds the maximum rating of that terminal 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 P7225 2 5 GHz Active Probe Service Manual iii General Safety Summary Symbols and Terms A A Terms in this Manual These
6. apter TekConnect to Calibration 80E0X we SMA adapter step generator H Generator CSA8000 TDS8000 remote head Trigger input SMA cable Internal clock output Figure 6 Test system rise time setup 2 Set the measurement instrument trigger to internal clock 3 Select the channel that you have connected to on the 80EOX sampling head and then set the measurement instrument vertical scale to 50 mV div NOTE The output of the step generator rises from a 250 mV level to ground 4 Adjust the measurement instrument horizontal and vertical position controls to display a signal similar to that shown in Figure 6 5 Set the measurement instrument horizontal scale to 50 ps div and center the waveform P7225 2 5 GHz Active Probe Service Manual 11 Peformance Verification 12 6 Use the measurement capability of the measurement instrument 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 t The system rise time t that you measured in step 6 represents the rise time of the test system without the probe After you assemble the test setup that includes the probe as shown in Figure 7 measure the system and probe rise time 4 4 in step 13 This is used to calculate the probe
7. ase Naji ea A aaa vii Manual Structure va lr a dg a AR A aa yas vii Related Documentation e o vii Contacting Tektronix sarcs saron eee ccc eee ence en eee Vili Description iii cern ise ee seni nl ES 1 Performance Verification 1 Replaceable PAS A a A AO a SE 1 Equipment Required 0 0 cece ccc eee nen eens 2 Special Adapters Required 2 Performance Verification 7 Equipment Setup sinora saw nig ae as Datei ied AN 7 Outpiit ZETO eth ae ed aa as We Pe aa a E eS 8 DC Gain ACCUTANE en es 9 Rise Time A A Va ee AJ en edn eins 10 P7225 2 5 GHz Active Probe Service Manual i Table of Contents List of Figures List of Tables Figure 1 TekConnect to SMA adapter 3 Figure 2 Probe tip adapter 3 Figure 3 TekConnect Interface Calibration Adapter 4 Figure 4 Setup for output zero 8 Figure 5 Setup for DC gain accuracy 9 Figure 6 Test system rise time setup 1 Figure 7 Test system and probe rise time Setup 13 Table 1 Eguipment reguired for performance verification 2 Table 2 TekConnect interface calibration adapter features 5 Table 3 Test record 15 P7225 2 5 GHz Active Probe Service M
8. e Tektronix TDS7254 TekConnect calibration adapter 067 0422 00 Calibration Step Generator 067 1338 0X Adapter 015 0678 00 DC Power Supply Tektronix PS280 DMM 2 with leads 0 05 accuracy 0 1 mV resolution Fluke 87 or eguivalent Feedthrough Termination 011 0129 00 BNC to BNC coaxial cable 2 012 0057 01 Coaxial cable 012 0649 00 Lead 2 012 0031 00 Lead 2 012 0039 00 Adapter 015 1011 00 Adapter 015 1012 00 Adapter 015 0554 00 Adapter 103 0090 00 Adapter Part of 196 3456 00 KlipChip adapter siten Zin mein Special Adapters Required Some of the adapters listed in Table 1 are custom made and available only from Tektronix The adapters are described on the following pages 2 P7225 2 5 GHz Active Probe Service Manual Description TekConnect to SMA The TekConnect to SMA Adapter Tektronix part number TCA SMA allows Adapter 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 P7225 Probe Figure 1 TekConnect to SMA adapter Probe Tip Adapter The probe tip adapter Tektronix part number 015 0678 00 provides a low noise method for connecting the P7225 to signals present on SMA cables The adapter has a test point for the probe and two SMA connectors A 50 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 circui
9. he test record on page 15 Before beginning these procedures photocopy the test record and use it to record the performance test results The recommended interval for verifying the warranted specifications is one year These procedures test the following specifications m Output zero m DC gain accuracy um Rise time Use this procedure to set up the eguipment to test the probe 1 Connect the probe calibration adapter to the host instrument 2 Connect the probe to the probe calibration adapter 3 Turn on the host instrument and select the channel that the probe calibration adapter is connected to 4 Verify that the Volts div readout on the host instrument channel displays the host instrument recognizes the probe through the adapter 5 Set the multimeter to read DC volts 6 Allow 30 minutes for the equipment to warm up Peformance Verification Output Zero Use this procedure to verify the probe output zero 1 Connect the test equipment as shown in Figure 4 2 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 3 Ground the probe tip by connecting the probe tip to the probe ground socket Connecting two KlipChip adapters together is recommended 4 Observe the multimeter display 5 Record the results in the test record on page 15 and compare the results against the Output Zero Voltage specificati
10. on on page 15 Digital TDS7254 Oscilloscope multimeter Set offset switch BNC to dual banana adapter adapters Y lead adapter TekConnect a calibration adapter 50 Q Precision termination BNC cable BNC SMA adapter Figure 4 Setup for output zero 8 P7225 2 5 GHz Active Probe Service Manual Peformance Verification DC Gain Accuracy 1 Disconnect the probe tip ground KlipChip adapters and connect the equipment as shown in Figure 5 BNC to dual Banana adapter BNC cable 50 Q Precision termination TekConnect ii ZE calibration acapar adapter Power supply x KlipChip Black adapters P7225 probe Y lead adapter Figure 5 Setup for DC gain accuracy 2 Record the results of steps 3 through 6 separately Use the results to calculate the DC attenuation accuracy of the probe in step 7 on page 10 3 Set the power supply to 1 000 V Use Digital Multimeter DMM 2 to verify that the DC voltage is as close to 1 000 V as possible Record this measurement as Vmax 4 Measure and record the reading of DMM 1 as M1 5 Set the power supply to 1 000 V Use DMM 2 to verify that the DC voltage is as close to 1 000 V as possible Record this measurement as Vmin 6 Measure and record the reading of DMM 1 as M2 P7225 2 5 GHz Active Probe
11. one 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 P7225 2 5 GHz Active Probe Service Manual AS A Description This document describes the Performance Verification for the P7225 2 5 GHz Probe Performance Verification Use the performance verification procedures to verify the warranted specifica tions of the P7225 probe The recommended interval for verifying the warranted specifications is one year No software is required to complete a performance verification of the probe The performance verification procedures check the following specifications Output zero m DC gain accuracy um Rise time Replaceable Parts There are no user replaceable parts inside the probe If the probe fails the performance verification procedure contact your Tektronix service center P7225 2 5 GHz 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 procedures Adapters 2 KlipChip adapter 206 0364 00 SMA torque wrench 5 16 in 7 in lb SMA adapter wrench 7 32 in Item description Recommended example Sampling Oscilloscope Tektronix TDS8000 Sampling head with extension cable Tektronix 80E0X with 012 1568 00 cable Oscilloscop
12. s P7225 2 5 GHz Active Probe Service Manual V Service Safety Summary vi P7225 2 5 GHz Active Probe Service Manual AS AA Preface This is the service manual for the P7225 2 5 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 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 in 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 service the probe correctly safely and efficiently Related Documentation The probe is shipped with the following manual m P7225 2 5 GHz Active Probe User Manual Tektronix part number 071 1187 XX P7225 2 5 GHz Active Probe Service Manual vii Preface Contacting Tektronix viii 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 ph
13. t to the other SMA connector See Figure 2 NOTE When taking measurements do not touch the probe tip adapter Measure ment accuracy is degraded when the probe tip adapter is handled km SMA connector for test circuit Probe test NX point Termination Figure 2 Probe tip adapter P7225 2 5 GHz Active Probe Service Manual 3 Description TekConnect Interface Calibration Adapter The TekConnect Interface Calibration Adapter Tektronix part number 067 0422 00 connects to 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 host instrument 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 host instrument When a probe is detected through the adapter the Volts div readout on the host instrument displays Refer to Table 2 on page 5 for features of the calibration adapter P7225 2 5 GHz Active Probe Service Manual Description Table 2 TekConnect interface calibration adapter features Feature Description Latch button Latch button The spring loaded latch mechanically connects the adapter to the host instrument To release the adapter grasp the adapter housing depress the la
14. tch button and pull the adapter straight out of the host instrument O Latch LZ Offset output select switch The offset output switch allows you to select between ground Offset switch and the offset voltage level from the host instrument oS Leave the switch in the ground position for the performance verification procedures Ea VAR GND Offset voltage The offset voltage of the probe is accessed through the BNC connector Measure the offset voltage using a DVM BNC coaxial cable and BNC to dual banana jack SE voltage output Signal out The SMA connector on the rear of the box allows for direct monitoring of the probe Signal signal out P7225 2 5 GHz Active Probe Service Manual 5 Description 6 P7225 2 5 GHz Active Probe Service Manual AA Lee Performance Verification Equipment Setup P7225 2 5 GHz Active Probe Service Manual Before you begin the performance verification procedures perform a probe verification routine on your host instrument with the probe you are verifying The probe verification routine verifies that the probe and the host instrument are working within nominal limits The host instrument measures the gain and offset of the probe and uses these values for optimal system performance Refer to the online help of your host instrument for more information on how to perform a probe verification routine Use the following procedures to verify the warranted specifications of the P7225 probe listed in t
15. 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 to property including the product Symbols on the Product The following symbols may appear on the product A CAUTION Refer to Manual P7225 2 5 GHz Active Probe Service Manual AAA RA 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 Disconnect Power To avoid electric shock switch off the instrument power then disconnect the power cord from the mains power Use Care When Servicing With Power On Dangerous voltages or currents may exist in this product Disconnect power remove battery if applicable and disconnect test leads before removing protective panels soldering or replacing component
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