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Probing principles

Probing principles

Read the helpful hints on the following pages to make probing easier and noise free.

Probe grounding

In addition to the (+) and (-) inputs on the probe
head, there is also a ground (common) input.
You can use the probe to take a differential
measurement regardless of whether the ground
is connected.

CAUTION.

To avoid damaging the circuitry

under test, connect the probe ground (common)
to a ground-reference point only.

See the technical reference manual on the CD
for more information.

TDP1500 Quick Start User Manual

39

Содержание TDP1500

Страница 1: ...x TDP1500 1 5 GHz Differential Probe ZZZ Quick Start User Manual P071220901 071 2209 01...

Страница 2: ......

Страница 3: ...TDP1500 1 5 GHz Differential Probe ZZZ Quick Start User Manual xx www tek com 071 2209 01...

Страница 4: ...ersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc TekVPI and TwinFoot are trademarks of...

Страница 5: ...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...

Страница 6: ......

Страница 7: ...l vii Returning the probe for servicing viii Key features 1 Operating considerations 2 Installation 3 Connecting to the host instrument 3 Probe controls and indicators 4 Functional check 7 Required eq...

Страница 8: ...4 Using standard accessories 24 Optional accessories 33 Options 38 Probing principles 39 Probe grounding 39 Input impedance and probe loading 40 Maintenance 41 Host instrument firmware 41 Error condit...

Страница 9: ...ugh the grounding conductor of the mainframe power cord To avoid electric shock the grounding conductor must be connected to earth ground Before making connections to the input or output terminals of...

Страница 10: ...y 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 Symbols...

Страница 11: ...General safety summary The following symbol s may appear on the product TDP1500 Quick Start User Manual v...

Страница 12: ...improperly handled at the product s end of life To avoid release of such substances into the environment and to reduce the use of natural resources we encourage you to recycle this product in an appr...

Страница 13: ...peration Functional Check Operating Basics This manual Specifications Performance Verification The technical reference manual In depth oscilloscope operation user interface GPIB commands The online he...

Страница 14: ...pping 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 Put the probe into an antistatic bag or wr...

Страница 15: ...opes featuring the new Tektronix TekVPI oscilloscope interface Key features include DC to 1 5 GHz bandwidth Selectable 850 mV 8 5 V range 1X 10X gain 200 k differential input resistance 1 pF different...

Страница 16: ...Range 7 V DC peak AC Both ranges either input referenced to ground Temperature Operating 0 to 40 C 32 F to 104 F Nonoperating 40 C to 71 C 40 F to 160 F Humidity Operating up to 40 C 104 F 5 90 RH Non...

Страница 17: ...e probe check the version requirements See page 41 Host instrument firmware 1 Slide the probe into the TekVPI receptacle The probe snaps when fully engaged When you connect the probe the host instrume...

Страница 18: ...e probe is powered on the Status LED glows green then dark and then green and remains lit green This indicates that the probe is in normal operating mode If the Status LED glows red a fault may exist...

Страница 19: ...ge button to toggle the range selection The corresponding LED lights to indicate the selected range NOTE The host instrument sets all probe settings to the last known state for the probe channel combi...

Страница 20: ...s controls for probe functions that are not accessible on the probe such as Offset Other functions can be controlled from both locations 2 Use the touch screen buttons on the instrument to set the pro...

Страница 21: ...Probe Technical Reference Manual Required equipment Description and quantity Performance requirement Recommended example 1 Oscilloscope TekVPI Interface Tektronix DPO7000 Series Y lead adapter 0 25 i...

Страница 22: ...that channel 2 Use the Y lead Adapter and two MicroCKT Test Tips to connect the probe tip to the PROBE COMP terminals on the oscilloscope 3 Press AUTOSET or adjust the oscilloscope to display the comp...

Страница 23: ...se Individual calibration constants are stored for each probe on each channel NOTE Probe calibration functions are not available on all oscilloscope models Prerequisites The equipment must be warmed u...

Страница 24: ...ion 2 In the Status box check that Pass is displayed 3 If the Instrument Calibration Status is not pass run the Signal Path Compensation routine Disconnect all probes and signal sources from the oscil...

Страница 25: ...Calibration 4 Connect the probe to the oscilloscope PROBE COMP connector 5 From the Vertical menu select Probe Cal TDP1500 Quick Start User Manual 11...

Страница 26: ...hanges from Running to Pass Close the notifier and begin using your probe If the Probe Status changes to Fail Check that the adapters are securely attached to the probe tips and to the PROBE COMP conn...

Страница 27: ...l size makes it easy to handle in tight areas 1 The probe tip sockets are sized to press onto two 0 025 inch pins spaced 0 100 inch apart 2 The ground socket provides a short ground path for ground co...

Страница 28: ...oltage difference between the and input pins that the probe can accept without distorting the signal The distortion from an input signal that is too large can result in an erroneous measurement Common...

Страница 29: ...Basic operation Figure 1 Input voltage limits with no DC offset 0 85 V Range TDP1500 Quick Start User Manual 15...

Страница 30: ...Basic operation Figure 2 Input voltage limits with no DC offset 8 5 V Range 16 TDP1500 Quick Start User Manual...

Страница 31: ...he probe at higher DC measurement voltages you should adjust the offset for optimal probe performance Offset NOTE See your oscilloscope manual for specific instructions on using the offset control 1 T...

Страница 32: ...o the oscilloscope zero reference 4 If you change the volts division setting adjust the offset to keep the trace on the zero reference level NOTE The probe has two linear operating ranges 0 85 V and 8...

Страница 33: ...e and a DPO7000 oscilloscope The oscilloscope is loaded with the DPOPWR power measurement software application to solve a typical test problem Measure switching loss Measure the power loss at the swit...

Страница 34: ...re 3 Figure 3 Power supply test points 2 Run the DPOPWR application 3 Select the Power Device tab 4 Select the Switching Loss option and press the Configure button 5 In the Source Configuration Panel...

Страница 35: ...plications 7 Select the Switching Loss measurement 8 Select Run to acquire data and display the results See Figure 4 on page 21 Figure 4 Switching loss results display TDP1500 Quick Start User Manual...

Страница 36: ...of a USB2 device With the help of a TDSUSB test fixture and a DPO7000 oscilloscope loaded with TDSUSB measurement software you can easily evaluate the performance of USB2 devices 1 Connect the TDP1500...

Страница 37: ...ize the High Speed test on the test system and then execute the test packet routine 4 Check the oscilloscope to verify that the test packets are being transmitted 5 Start the TDSUSB application on the...

Страница 38: ...quantities differ from the quantities of accessories included with the probe Using standard accessories Tip saver Use the Tip Saver to prolong the life of your probe tip contacts The Tip Saver bears t...

Страница 39: ...keted leads and adapters WARNING The tips have sharp points To prevent injury use care when you handle the tips 1 Push the tip into the socket until it is seated You can use either end of the tip Do n...

Страница 40: ...The pins have sharp points To prevent injury use care when you handle the adapter 1 Push the adapter into the probe until it is seated Do not force the tip 2 Adjust the spacing between the pins to su...

Страница 41: ...stors for best signal fidelity The 1 inch adapter can span up to 1 5 inches between test points and the 3 inch adapter can span up to 5 5 inches NOTE The 3 inch adapter performance is best below 500 M...

Страница 42: ...s adapter performance is best below 250 MHz The Y lead adapter accepts any of the probe tips or adapters 1 Push the adapter into the probe until it is seated 2 Connect the adapter to your circuit or t...

Страница 43: ...formance is best below 100 MHz 1 Press the Y lead into the handle of the MicroCKT Test Tip 2 Turn the tip body to allow better probe orientation 3 If necessary you can slightly bend the tip sleeve to...

Страница 44: ...the socketed end of the lead to any of the probe tips or adapters You can also connect to 0 025 inch square pins in your circuit When selecting the grounding connection maintain as short a ground path...

Страница 45: ...ach one band to the probe cable and another band of the same color near the probe compensation box 2 Connect the probe to the channel that matches the color of the band Five colored pairs are included...

Страница 46: ...ase to hold the probe the accessories and the manual 1 Place the probe accessories and manual in the carrying case 2 Close the carrying case to transport the accessories to another location or for sto...

Страница 47: ...Micro Grabber to probe the leads on integrated circuits that are surface mounted The IC Micro Grabbers are easiest to use with the Y Lead Adapter or Ground wires 1 Push the IC Micro Grabber onto the...

Страница 48: ...in spacing adjusts from 0 to 0 31 in 1 Push the adapter into the probe tip until it is seated Do not force the adapter Also be careful not to injure yourself on the sharp points 2 Adjust the spacing b...

Страница 49: ...flexible fingers adapt to a range of lead spacings 1 Push the adapter into the probe tips until it is seated 2 Touch the adapter to your integrated circuit leads One side of the adapter pins are insul...

Страница 50: ...2 Probe your circuit Order Tektronix part number 016 1782 XX quantity 6 BNC to Probe tip adapter Use this adapter for the performance verification tests The adapter provides connections for signal sou...

Страница 51: ...u must use the calibration fixture The fixture provides an SMA connector in the probe signal path for internal probe measurements Instructions for use are included in the performance verification proc...

Страница 52: ...ration data report Option D3 Calibration data report 3 years with Option C3 Option D5 Calibration data report 5 years with Option C5 Option R3 Repair service 3 years Option R5 Repair service 5 years M...

Страница 53: ...the probe head there is also a ground common input You can use the probe to take a differential measurement regardless of whether the ground is connected CAUTION To avoid damaging the circuitry under...

Страница 54: ...inputs from loading the signal sources The greater the source impedances and the higher the signal frequencies the more you should take these factors into account The more the impedance of the signal...

Страница 55: ...riodically check the web site for new firmware versions that enhance the performance and capabilities of your Tektronix instruments To check the firmware version on Windows based instruments from the...

Страница 56: ...e probe during exterior cleaning Do not use chemical cleaning agents they may damage the probe Avoid using chemicals that contain benzine benzene toluene xylene acetone or similar solvents Clean the e...

Страница 57: ...the probe 42 Color Band Kit 31 Connecting the probe 3 D Documentation vii 38 E Environmental considerations vi Error condition 41 F Features 1 Firmware 41 Frequency derating graph 2 Functional check...

Страница 58: ...Index R Range LED 41 Related documentation vii Replacement parts 42 Returning the probe viii S Safety Summary iii Signal path compensation 10 T TekVPI 3 44 TDP1500 Quick Start User Manual...

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