manualshive.com logo in svg

LeCroy AP034, Instruction Manual

Share
Download
LeCroy AP034 Instruction Manual Download Page 48

²

ISSUED: January 2000

AP034-OM-E Rev D

$3$FWLYH3UREH

14. Record the displayed “Common Mode Signal at 1 MHz” to

two-digit resolution in the Test Record.

15. Calculate  the  “Common Mode Rejection Ratio (CMRR) at

1 MHz” by dividing 8000 mV by the measured Common
Mode Signal recorded in step C-14. Record the result in the
Test Record.

16. Verify that the Common Mode Rejection Ratio at 1 MHz is

greater than 100:1 (40 dB).

17.  Remove all cables and test fixtures from the AP034 probe.

This completes the Performance Verification of the AP034.
Complete and file the results recorded in the AP034 Performance
Verification Test Record, as required by your quality procedures.
Apply a suitable calibration label to the AP034 housing as
required.

#  #  #

Summary of Contents for AP034

Page 1: ... QVWUXFWLRQ 0DQXDO H UR 3 FWLYH LIIHUHQWLDO 3UREH REVISION D JANUARY 2000 ...

Page 2: ... abnormal conditions of operation or damage resulting from attempted repair or modifications by a non authorized service facility The customer will be responsible for the transportation and insurance charges for the return of products to the service facility LeCroy will return all products under warranty with transportation prepaid This warranty replaces all other warranties expressed or implied i...

Page 3: ...ut Loading 3 4 Grounding the Probe 3 4 Selecting the Proper Range 3 6 Operation with LeCroy Oscilloscopes 3 7 AP034 Use with the ADPPS Power Supply 3 8 Adding Offset 3 10 Autobalance 3 11 Designing Test Fixtures for the AP033 Probe 3 12 Reference Information Differential Mode and Common Mode 4 1 Differential Mode Range and Common Mode Range 4 1 Common Mode Rejection Ratio 4 2 Care and Maintenance ...

Page 4: ...e 6 3 Procedure 6 3 Check Gain Accuracy 6 4 Check High Frequency CMRR 6 5 Check Low Frequency CMRR 6 8 Performance Verification Test Record 6 11 Adjustment Procedure Introduction 7 1 Test Equipment Required 7 2 Preliminary Procedure 7 4 Procedure 7 7 Adjust Coarse DC Balance R226 7 7 Adjust Fine DC Balance R304 7 8 Adjust Low Frequency CMRR R7 7 9 Adjust Offset R330 7 11 Adjust Gain R322C 7 13 Adj...

Page 5: ...Characteristics 8 1 Warranted Electrical Characteristics 8 2 Typical Electrical Characteristics 8 3 General Characteristics 8 5 Compliance and Certifications 8 6 Operator Safety 8 6 Standard Accessories 8 7 Optional Accessories 8 7 Oscilloscope Software Compatibility 8 7 ...

Page 6: ...YL ISSUED January 2000 AP034 OM E Rev D 3 FWLYH 3UREH BLANK PAGE ...

Page 7: ...tures The probe is powered directly from a LeCroy oscilloscope through the ProBus interface The ProBus interface also allows local control of the probe through the oscilloscope user interface and remote control through the interface buses GPIB RS 232 The optional ADPPS power supply allows the AP034 to be used with other instruments such as spectrum analyzers network analyzers and oscilloscopes wit...

Page 8: ...llowed to avoid possible damage to the instrument or the device under test WARNING A Warning alerts you to potential injury to yourself Failing to adhere to the statement in a WARNING message could result in bodily injury The following symbol may appear on the product This symbol refers you to additional information contained in this manual The corresponding information in the manual is denoted wi...

Page 9: ...ded by the test instrument before connecting the probe inputs to the test circuit Do not use the probe in wet or explosive atmospheres Remove any contamination from the probe housing before connecting the probe inputs to any circuit Make sure that the surface of the probe head is completely dry before connecting the inputs Use of the probe and or the instrument it is connected to in a manner other...

Page 10: ... ISSUED January 2000 AP034 OM E Rev D 3 FWLYH 3UREH BLANK PAGE ...

Page 11: ...er interface To use the AP034 Active Differential Probe with instrumentation not equipped with a ProBus interface it is necessary to use the ADPPS Power Supply Attach the ADPPS connector to the probe output connector The output connector of the ADPPS is a standard male BNC that can be directly connected to another instrument If necessary the output of the ADPPS can be interconnected with a 50 FRD ...

Page 12: ...by using short interconnection leads and twisting them together to minimize the loop area High common mode rejection requires precise matching of the relative gain or attenuation in the and input signal paths Mismatches in additional parasitic capacitance inductance delay and a source impedance difference between the and signal paths will lower the common mode rejection ratio Therefore it is desir...

Page 13: ...d with model AP033 probes prior to the introduction of the AP034 did not include the model number on the label When using an external attenuator with the AP034 Active Differential Probe make sure it is labeled AP034 Interchanging non compatible attenuators will not damage the probes however the transient response of the measured signals will be significantly in error In addition to being compatibl...

Page 14: ...er at very high frequencies the capacitive reactance of the probe s input capacitance may load the circuit enough to affect measurement accuracy The equivalent model of the probe input circuits is shown below Figure 1 AP034 Equivalent Input Model GROUNDING THE PROBE The single lead along with one of the larger 0 8 mm mini clips can be used to ground the probe to the test circuit Insert the pin end...

Page 15: ...und to a circuit that is referenced to earth ground can create a ground loop that may add noise to low amplitude signals Rejection of high frequency common mode signals is improved when the probe head is ungrounded The best recommendation for connecting or not connecting the probe ground is to try both configurations and select the one that performs the best Note The AP034 Active Differential Prob...

Page 16: ... common mode range of the probe Refer to the block diagram below Figure 2 AP034 Block Diagram By using the plug on attenuator you can extend the attenuation range to 20 Do not use the 10 and 20 plug on attenuators simultaneously The maximum ranges are given in the following table Table 1 AP034 Dynamic ranges and input capacitance at different attenuator settings 1 Attenuation Probe Only 10 Attenua...

Page 17: ... the probe detects the presence of either attenuator and displays the effective gain of the probe on the probe front panel OPERATION WITH LECROY OSCILLOSCOPES When the AP034 probe is connected to a LeCroy oscilloscope equipped with ProBus interface the displayed scale factor will be adjusted to account for the effective gain of the probe The channel OFFSET knob will control the probe offset rather...

Page 18: ... input impedance is not 50 LQVHUW D LQ OLQH WHUPLQDWRU between the ADPPS and the instrument input If a coaxial extension cable is used the terminator should be located at the instrument end of the cable Note that the additional parasitic losses of extension cables may reduce the usable bandwidth of the system below the AP034 specification To prevent signal distortion it is necessary to keep the AP...

Page 19: ...rvable Signal with Offset Input Noise nV Hz Typical 2 mV Div 2 mV Div 1 16V 8 mV2 1 6 V 1 608 V 35 5 mV Div 5 mV Div 1 16 V 20 mV2 1 6 V 1 620 V 35 10 mV Div 10 mV Div 1 16 V 40 mV2 1 6 V 1 640 V 35 20 mV Div 20 mV Div 1 16 V 80 mV2 1 6 V 1 680 V 35 50 mV Div 50 mV Div 1 16 V 200 mV2 1 6 V 1 800 V 35 100 mV Div 100 mV Div 1 16 V 400 mV3 1 6 V 2 0 V 35 200 mV Div 20 mV Div 101 42 V 800 mV2 16 V 16 ...

Page 20: ...he probe housing will be disabled When used with the ADPPS Power Supply on instruments that lack ProBus support offset can be controlled with the buttons on the probe s front panel The offset can be returned to zero at any time by briefly pressing both the Î and Ï OFFSET buttons at the same time Pressing both the Î and Ï OFFSET buttons for more than 2 seconds will initiate an Autobalance cycle Not...

Page 21: ...ance must be invoked by you When power is first applied the probe will return to the internal values resulting from the last Autobalance cycle For Autobalance to function properly all signals must be removed from the input After several minutes of warmup or when the probe is exposed to a large shift in ambient temperature some DC offset drift may occur from thermal effects in the amplifier circuit...

Page 22: ... facilitate use with custom test fixtures the input receptacles used in the AP034 probe are compatible with commercially available 0 025 in 0 635 mm square pins The receptacles do not require a specific rotational orientation for the square pin The dimensions listed below can be used as a layout guide for a test fixture circuit board The recommended insertion depth of the pins is 0 100 in 2 5 mm t...

Page 23: ...inputs The common mode voltage can be expressed as DIFFERENTIAL MODE RANGE AND COMMON MODE RANGE The Differential Mode Range is the maximum signal that can be applied between the and inputs without overloading the probe amplifier resulting in clipping or distortion of the waveform measured by the oscilloscope The Common Mode Range is the maximum voltage with respect to earth ground that can be app...

Page 24: ...an be expressed as a ratio for example 10000 1 or implicitly in dB for example 80 dB Higher numbers indicate greater rejection better performance The first order term that determines the CMRR is the relative gain matching between the and input paths To obtain high CMRR values the input attenuators in a differential probe are precisely matched to each other The matching includes the DC attenuation ...

Page 25: ...frequency components much higher than the repetition rate may suggest As such it is very difficult to predict actual performance in the application for CMRR versus frequency graphs The practical application of these graphs is to compare the relative common mode rejection performance between different probes or amplifiers ...

Page 26: ... ISSUED January 2000 AP034 OM E Rev D 3 FWLYH 3UREH BLANK PAGE ...

Page 27: ...e field Defective probes must be returned to a LeCroy service facility for diagnosis and exchange A defective probe under warranty will be replaced with a factory refurbished probe A probe that is not under warranty can be exchanged for a factory refurbished probe A modest fee is charged for this service The defective probe must be returned in order to receive credit for the probe core TROUBLESHOO...

Page 28: ...nect both the input and input to one of the two input signals If the trace is off scale the input signal is probably exceeding the common mode range Repeat with the other input signal 7 Is a ProBus Power Supply Overload error message displayed If so remove all other ProBus accessories from the oscilloscope Is the message still displayed If so remove the AP034 Is the message still displayed If so t...

Page 29: ...result in DC gain errors Check the probe accuracy with the oscilloscope calibrator signal 2 Verify that the probe is not being overdriven into clipping for its current gain setting 3 Excessive offset can result from large changes in ambient temperature Remove the input signal from the probe and repeat the Autobalance cycle With the Offset set to zero did the trace return to the center of the grati...

Page 30: ... Authorization Number RAN should be used The RAN can be established by contacting your nearest LeCroy office or the New York Customer Care Center Return shipments should be made prepaid LeCroy cannot accept COD or Collect Return shipments We recommend air freighting It is important that the RAN be clearly shown on the outside of the shipping package for prompt redirection to the appropriate LeCroy...

Page 31: ...REPLACEMENT PARTS The probe connection accessories and other common parts can be ordered through the regional customer care centers Refer to Figure 7 for LeCroy Part numbers Defective probes can be replaced on an exchange basis The replacement exchange probe will have been factory repaired inspected and calibrated to the same standards as a new product In order to obtain an exchange probe you must...

Page 32: ... ISSUED January 2000 AP034 OM E Rev D 3 FWLYH 3UREH Figure 7 Replceable Parts 13 14 12 11 2 5 8 6 7 4 9 10 1 3 ...

Page 33: ... 3XX P53 ProBus End Cap A 1 8 70A P03 303 Termination Box A 1 9 337 000 018 LeCroy Termination Box Label with cutouts A 1 10 416 090 004 Grey Switch Cap A 4 11 377 000 008 LeCroy Termination Box Rear Label A 1 12 PK033 Accessory Kit AP033 34 without AC Coupler and Attenuator A 1 13 AP03X FLEX LEAD Flex Lead B 1 14 AP03X OFFSET PIN Offset Pin package of 10 B AP034 PROBE FRU AP034 Probe only Exchang...

Page 34: ...accidentally mixed between probes you can use the procedure listed below to restore the compensation match This adjustment does not affect any of the parameters in the warranted specifications Therefore the required test equipment does not need to be calibrated Note The AP033 and AP034 Active Differential Probes have different input capacitance The 10 Plug on attenuator supplied with model AP033 c...

Page 35: ...th a file Then using heat from a soldering iron insert the pin into a short length of rigid plastic tubing to serve as a handle PROCEDURE 1 Attach the AP034 to the test oscilloscope If the test oscilloscope is not equipped with ProBus use the ADPPS to provide power for the AP034 2 Attach the 10 or 20 Attenuator Adapter to the AP034 probe tip 3 Insert 0 025 in 0 635 mm square pins into the and inpu...

Page 36: ...ce noise 9 Turn on the signal source Set the output frequency to approximately 5 kHz Set the output amplitude to approximately 1 V for matching the 10 Attenuator Adapter or 2 V for matching the 20 Attenuator Adapter 10 Adjust the test oscilloscope trigger level for a stable trace If necessary use the probe offset to position the waveform to show the square corner of the test signal NOTE Do not use...

Page 37: ...emove noise 15 The displayed waveform is the common mode response Using the adjustment screwdriver with the flat blade adjust the DC Atten Balance Figure 8 to minimize the amplitude of the flat portions of the displayed waveform This adjustment only affects the flat portions of the square wave Do not be concerned with any overshoot at the transitions 16 Reduce the Test Oscilloscope Averaging weigh...

Page 38: ...m It may not be possible to completely eliminate the overshoot As with the LF Comp adjustment the added capacitance of the adjustment tool may change the amplitude of the waveform when it is inserted The correct adjustment is achieved when the overshoot is minimized with the adjustment tool removed ...

Page 39: ... exposing yourself to hazardous voltages Adjustment should only be attempted if a parameter measured in the Performance Verification Procedure is outside of the specified limits Adjustment should only be performed by qualified personnel TEST EQUIPMENT REQUIRED Table 3 lists the test equipment and accessories or their equivalents that are required to verify the performance of the AP034 Active Diffe...

Page 40: ...esearch Model DS340 Leader LAG 120B High Frequency Sine Wave Generator 50 to 500 MHz and 50 kHz Output adjustable from 300 mV to 2 Vp p Agilent Technologies 8648C Terminator in line BNC FRD LDO WHUPLQDWLRQ Pomona 4119 50 Terminator precision BNC 0 2 LeCroy TERM CF01 Attenuator BNC 10 20 dB Pomona 4108 20dB BNC coaxial cable 2 required PDOH PDOH 1 LQ Pomona 5697 36 Calibration Fixture ProBus Extens...

Page 41: ...Verification Test Record located at the end of this section and fill in the necessary information The warranted characteristics of the AP034 Active Differential Probe are valid at any temperature within the Environmental Characteristics listed in the Specifications However some of the other test equipment used to verify the performance may have environmental limitations required to meet the accura...

Page 42: ...ual male banana plug adapter to the free end of the second BNC cable Connect the banana plugs to the Digital Multimeter DMM 5 Set the DMM to measure AC Volts 6 Set the mode of the Function Generator to Sine Wave the frequency to approximately 1 kHz and the output amplitude to approximately 200 mV rms as measured by the DMM 7 Record the measured amplitude to 100 µV resolution in the Test Record 8 U...

Page 43: ...ces x xx on line A 15 in the Test Record 16 Verify that the X1 gain error is less than 2 17 Disconnect both BNC cables from the test setup B Check High Frequency Common Mode Rejection Ratio CMRR Note Common Mode Rejection Ratio CMRR is defined as the Differential Mode Gain divided by the Common Mode Gain normalized inverse of the Common Mode response At frequencies below approximately 250 MHz the ...

Page 44: ...oscilloscope as follows Display Channel 2 only Channel 2 VOLTS DIV 0 5 V div Channel 2 Coupling DC 50Ω Trigger on 2 Trigger coupling 2 HF TIME DIV 5 ns div Acquisition Mode NORMAL 7 Set the high frequency sine wave generator frequency to 100 MHz and the amplitude to approximately 2 Vp p Set the RF Output to ON 8 Adjust the oscilloscope trigger level as needed for a stable display 9 Adjust the outp...

Page 45: ...the output waveform appears to be a 1 Volt square wave check that the Common Mode Drive 50 ohm Termination connector of the AP033 AP034 Calibration Fixture is being used and not the Differential Drive 50 ohm Termination connector 13 Measure the peak to peak output amplitude of the AP034 Record the reading to two digit resolution xx mV as Common Mode Signal at 100 MHz in the Test Record 14 Calculat...

Page 46: ...l 2 input coupling to DC1 MΩ the channel 2 vertical scale to 5 Volt div the horizontal scale to 5 ms div and the trigger source to channel 2 Set BW limiting on channels 1 and 2 to 25 MHz 3 Connect the BNC Tee adapter to the output connector of the Function Generator Connect a BNC cable from one end of the BNC Tee adapter to channel 2 of the oscilloscope Connect a second BNC cable from the remainin...

Page 47: ...ulate the Common Mode Rejection Ratio CMRR at 70 Hz by dividing 20 000 mV by the measured Common Mode Signal recorded in step C 7 direct reciprocal of the Common Mode Gain Record the result to two digit resolution xx 000 1 in the Test Record 9 Verify that the Common Mode Rejection Ratio at 70 Hz is greater than 10000 1 80 dB 10 Change the output amplitude of the Function Generator to approximately...

Page 48: ...nal recorded in step C 14 Record the result in the Test Record 16 Verify that the Common Mode Rejection Ratio at 1 MHz is greater than 100 1 40 dB 17 Remove all cables and test fixtures from the AP034 probe This completes the Performance Verification of the AP034 Complete and file the results recorded in the AP034 Performance Verification Test Record as required by your quality procedures Apply a ...

Page 49: ...the actual specification limit check The test limits are included in all of these steps Other measurements and the results of intermediate calculations that support the limit check are to be recorded in the column labeled Intermediate Results Permission is granted to reproduce these pages for the purpose of recording test results Model __________AP034_________ Serial Number _______________________...

Page 50: ...____________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ ___________________...

Page 51: ...e circuitry Therefore it is necessary that all adjustments be performed in the order listed For best overall instrument performance make each adjustment to the exact setting even when adjustment is within the limits stated in the procedure Adequate guard bands were designed into the AP034 Active Differential Probe to ensure that it will meet or exceed published specifications over the entire opera...

Page 52: ...equivalents that are required for complete calibration Specifications given for the test equipment are the minimum necessary for accurate calibration All test equipment is assumed to be correctly calibrated and operating within the specifications listed Detailed operating instructions for the test equipment are not given in this procedure Refer to the test equipment manual if more information is n...

Page 53: ... LQWR 0 50 Hz to 1 MHz frequency range Sync or Freq Reference output Agilent Technologies 33120A Stanford Research Model DS340 Leader LAG 120B Fast Rise Pulse Generator Risetime 2 ns PSOLWXGH P9 LQWR Over Undershoot 6 Calibrator signal from LeCroy oscilloscope Tegam Tektronix PG506 with power unit Sine Wave Generator Output 250 MHz at 1 V rms Agilent Technologies 8648C with male N to female BNC ad...

Page 54: ...inimum Specifications and the PRGHO 336 SRZHU VXSSO 7KH LQSXW WHUPLQDWLRQ RI WKH RVFLOORVFRSH PXVW EH VHW WR WKH offset or position must remain at center screen and the high frequency adjustments must be performed with the ADPPS connected directly to the input of the oscilloscope PRELIMINARY PROCEDURE 1 Using pliers carefully remove each of the push buttons from the ProBus interface housing by gen...

Page 55: ...interface housing Be sure that the connectors between the boards are firmly engaged before applying power to the probe Operating the probe without the logic board will not damage it However to ensure reliable operation the logic board should only be mated with the Amplifier board with the power removed and the ProBus connector disengaged 5 Apply power to the oscilloscope and to the other test inst...

Page 56: ...of the AP034 Active Differential Probe controls requires software version 8 1 0 or higher You can find out the software version loaded on your LeCroy scope by pressing SHOW STATUS then selecting the System menu option In version 8 1 0 and higher the OFFSET controls on the front panel of the probe are disabled Offset is controlled by the OFFSET knob in the oscilloscope CHANNEL section ...

Page 57: ... on the Logic Board Use the two holes closest to the probe cable Figure 9 Figure 9 3 To enter the Cal Mode push either of the two offset buttons that protrude through holes in the Logic Board 4 Plug the precision 50 WHUPLQDWRU LQWR WKH 00 LQSXW 6HW the DMM to measure DC volts 5 Using a low capacitance screwdriver adjust Coarse DC Bal R226 on the Amplifier Board for an output voltage of 0 mV 10 mV ...

Page 58: ...the output BNC connector by reconnecting the cable to the SHORT connector on the AP033 AP034 Calibration Fixture The SHORT connector is the only BNC connector on the AP033 AP034 Calibration Fixture that does not have corresponding input pins for the probe tip It is located on the end of the board beyond the Common Mode Terminated connector 6 In Cal Mode the EFFECTIVE GAIN indicators serve as an ad...

Page 59: ...ther end of the BNC cable Connect the male end of the 50 WHUPLQDWRU WR FKDQQHO RQ WKH VFRSH The scope end of the ProBus extension cable should remain connected to channel 1 of the scope although there is no signal cable connected 2 Connect a BNC cable from the output of the Function Generator to the Channel 2 input of the oscilloscope 3 Connect a second BNC cable from the Function Generator SYNC O...

Page 60: ...n Mode Drive No Termination connector of the AP033 AP034 Calibration Fixture 9 Carefully align the four pins that correspond to the Common Mode Drive No Termination portion of the AP033 AP034 Calibration Fixture with the input receptacles in the AP034 probe head Press the probe into the fixture to fully engage the pins 10 Set the oscilloscope to display channel 3 The waveform is the common mode si...

Page 61: ... mV div and the acquisition mode to Auto Set the BWL to 20 or 25 MHz Adjust the OFFSET to 0 0 mV 3 Carefully move the AP034 probe tip from the Common Mode Drive No Termination position of the AP033 AP034 Calibration Fixture to the Differential Drive No Termination position Press the probe into the fixture to fully engage the pins 4 Connect female BNC to dual male banana plug adapters to each end o...

Page 62: ...the probe offset to 1 600 V by rotating the OFFSET knob in the channel section of the oscilloscope 11 Allow 10 seconds for the AP034 to stabilize 12 Using a low capacitance screwdriver adjust Offset R330 to bring the trace back to exactly center screen See Figure 10 for adjustment location 13 Remove the dual banana plug adapter from the output of the DC voltage source and reconnect it with the pin...

Page 63: ...a plug adapter at the output of the DC voltage source and the corresponding probe offset value with each repetition 23 Disconnect the cable from the DC Voltage Source Keep the AP033 AP034 Calibration Fixture connected to the AP034 for the next step E Adjust GAIN R322C 1 Set the AP034 offset to 0 000 V by rotating the OFFSET knob in the CHANNEL section of the oscilloscope 2 Disconnect the BNC cable...

Page 64: ...cision 50 Ω terminator F Adjust Final Attenuator Compensation C17 Note The calibrator signal from a LeCroy oscilloscope is the recommended signal source for this adjustment If another oscilloscope is being used for this procedure make sure that the square wave source has adequate flatness minimum overshoot and undershoot 1 Press the UTILITIES button then select the CAL BNC Setup menu Set the mode ...

Page 65: ...rmination portion of the AP033 AP034 Calibration Fixture to the Common Mode Drive 50 ohm Termination portion 2 Remove the BNC cable from the Differential Drive 50 ohm Termination connector of the AP033 AP034 Calibration Fixture Connect one end of the BNC cable to the Common Mode Drive 50 ohm Termination connector of the AP033 AP034 Calibration fixture Connect the other end of the cable to the fema...

Page 66: ...he cover appears not to close completely remove it and again check for adequate clearance between the brass insert and the cable wires 4 Replace the 5 64 in Allen cap screw and tighten 5 Hold the Logic Board Amplifier Board assembly in one hand with the Logic board facing up Hold the ProBus Interface housing in the other hand with the control side side with holes for the buttons facing up 6 Align ...

Page 67: ...cation procedure to ensure compliance with the warranted specifications 2 Perform the Attenuator Matching Procedure listed on page 5 8 Apply calibration seals in accordance with your quality procedures This concludes the Adjustment Procedure Repeat the Performance Verification procedure to complete the calibration of the AP034 ...

Page 68: ... ISSUED January 2000 AP034 OM E Rev D 3 FWLYH 3UREH BLANK PAGE ...

Page 69: ...ithin the past 12 months in an ambient temperature of 23 5 C NOMINAL CHARACTERISTICS Nominal characteristics describe parameters and attributes that are guaranteed by design but do not have associated tolerances Input Configuration True Differential and Inputs with shield Ground connector Effective Gain 1 X1 10 1 20 1 Input coupling DC AC Coupling obtained by installing AC Coupling Adapter Differe...

Page 70: ...e 50 Ω Add uncertainty of termination impedance to accuracy 3 LeCroy measures CMRR with a fixture that connects the probe tip ground to the signal source ground This method is necessary to obtain a reproducible CMRR measurement Often users leave the probe tip ungrounded when measuring high frequency signals Not grounding the probe tip can actually improve CMRR by allowing some of the common mode s...

Page 71: ...Differential Offset Range 1 6 V 1 Attenuation 16 V 10 Attenuation 42 V 20 Attenuation CMRR See Figure 13 Input Resistance each side to ground 1 M Input Capacitance between inputs 0 85 pF See Figure 1 Input Capacitance each side to ground 1 5 pF See Figure 1 Noise referred to input 10 to 1000 MHz 35 nV Hz 1 Attenuation 350 nV Hz 10 Attenuation 700 nV Hz 20 Attenuation Output Impedance 50 QRPLQDO QW...

Page 72: ... ISSUED January 2000 AP034 OM E Rev D 3 FWLYH 3UREH Figure 13 Typical CMRR Graphs ...

Page 73: ...er for round pins Power Requirements powered from oscilloscope through ProBus interface or with ADPPS power supply Dimensions Control Housing Length 3 625 in 9 2 cm Width 1 50 in 3 8 cm Height 1 00 in 2 5 cm Head Length 4 0 in 10 1 cm w o Attenuator or AC Coupler Width 2 25 in 2 25 cm Height 0 625 in 1 6 cm Cable Length 42 in 106 cm Diameter 0 275 in 7 0 mm Weight Probe only 6 4 oz 0 18 kg Shippin...

Page 74: ...d to comply with EN 61010 1 Installation Category I 42 4 V Pollution Degree 1 OPERATOR SAFETY The probe is intended to be used only with instruments that are connected to earth ground through the input BNC connector When you are using a ADPPS Power Supply Adapter make sure that the adapter is connected to a BNC connector that is grounded by the test instrument before connecting the probe inputs to...

Page 75: ...TIBILITY For full control functionality of the probe the LeCroy oscilloscope must have software version 8 1 0 or higher loaded The software version installed in a LeCroy oscilloscope can be verified by pressing the SHOW STATUS button on the front panel then selecting the System menu choice The probe can be used with earlier versions of software however probe offset can only be controlled through t...

Page 76: ... ISSUED January 2000 AP034 OM E Rev D 3 FWLYH 3UREH BLANK PAGE ...

Reviews:

No comments

Brands by name

Popular brands

Load more brands