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Leader™ Oscilloscope / Differential Probes Oscilloscope / Differential Probe Selection Selecting the correct oscilloscope probe ensures accuracy and can improve the performance of your test instrument. TPI offers a wide range of high quality oscilloscope probes designed to meet the most demanding applications. The IPseries monolithic probes have switchable attenuation and are available in 60 and 250MHz. These probes are ideal for technicians that need a basic oscilloscope probe. The slimline design Pand SP series probes are available in fixed or switchable attenuation. These series of probes are perfect for the technician needing additional features such as replaceable cable and interchangeable probe tip. The compensation adjustment for these probes is located in the BNC to eliminate noise pickup. TPIalso offers three models of high voltage differential probes all with high common mode rejection, wide bandwidth, and fast rise times. Differential probes enable the viewing of signals not referenced to earth ground and provide better performance than a matched pair of single ended oscilloscope probes when measuring these types of signals. Several important factors must be taken into account when selecting the proper probe.

  • The probe should have sufficient bandwidth and rise time for the test instrument and application. Choose a probe with at least an equal bandwidth as the scope it will be used with. For best performance a probe with twice the bandwidth as the scope should be selected.
  • For oscilloscope probes, the input capacitance of your oscilloscope should be within the compensation range specification of the probe. In addition, if your oscilloscope has readout function, select a probe with this capability.
  • For differential probes, make sure the maximum differential voltage is adequate for your application and the common mode rejection specification meets the requirements of the tests being performed. Refer to the oscilloscope and differential probe specification tables to select the correct probe for your application. Distributed By: www.tpi-thevalueleader.com To learn about the entire line of TPI products visit: L T AW OP 0705 Copyright © 2005 Test Products International, Inc. Test Products International, Inc. Headquarters: 9615 SW Allen Blvd. Beaverton, OR 97005 USA 503-520-9197 Fax: 503-520-1225 email: info@tpi-thevalueleader.com Test Products International, Ltd. 342 Bronte St. South Unit 9 Milton, Ontario L9T 5B7 Canada 905-693-8558 Fax: 905-693-0888 email: info@tpicanada.com Test Products International UK Ltd. Longley House, East Park Crawley, West Sussex RH10 6AP England Tel: +44 (0)1293 561212 Fax: +44 (0)1293813465 contactus@tpieurope.com >> Attenuation:Ratio of the output signal to the input signal. Attenuation should remain constant decreasing by 3dB only as the frequency increases to the maximum bandwidth. >> Bandwidth: The maximum -3dB frequency that can be expected. >> Cable Length: Length of the cable from the end of the probe to the end of the connector. It is important to use a probe with just enough cable length for your needs. Long cables increase the capacitance and propagation delay of the probe. >> Compensation Range: The range a probe can be compensated to match the input capacitance of the test equipment it is being used with. >> IEC 1010: Probes with the IEC 1010 category rating have been designed for safety. >> Input Impedance: The total resistance and capacitance as measured at the tip of the probe. This specification is used to define the loading effect of a probe. At frequencies under 1MHz the input resistance of the probe will have the most influence. At higher frequencies the input capacitance will have the most influence. >> Max Input Voltage: The maximum voltage the probe can be used at. >> Max Differential Voltage: The maximum differential voltage that can be measured by a differential probe >> Readout: Probes with this capability are compatible with readout function oscilloscopes that automatically detect and display the attenuation factor of the probe. >> Rise Time: The time required for the leading edge of a pulse to rise from 10% to 90% of its final value. >> CMRR: Common Mode Rejection Ratio. A measure of a differential probes ability to reject any signals common to both test points in a differential measurement Oscilloscope / DifOscilloscope / Differferential Prential Probe obe TTerminologyerminology Distributed by: Terminology Use TPI Probeswith: Bench Top, Portable, Analog, and Oscilloscopes MARKETS Electronic Communication Commercial Industrial APPLICATIONS Logic signal and waveform tests Measure voice / data signals Analyze power quality Test motor control circuits Refer to pages 2-3 for specifications. TPI offers a complete line of... CO, Combustibles & Combustion (CEA) Refrigerant Leak Detectors Digital Manometers Temperature Contact & IRInstruments IAQ: Air Flow / Humidity Handheld Oscilloscopes Digital Multimeters & Clamp-on Meters Accessories & Kits

FUNCTIONADF25ADF25A ADF25C BandwidthDC -25 MHz (-3dB) DC -25 MHz (-3dB) DC -70 MHz (-3dB) Accuracy± 2% ± 2% ± 2% Risetime14nS 14nS 14nS CMRR (Typical) 50Hz-80dB -86dB -80dB 20kHz-60dB -66dB -60dB 200kHz-50dB -56dB -50dB Input Impedance4M/10pf each 4M/10pf each10M/10pf each side to ground side to ground side to ground 8M/5pF 8M/5pF20M/5pF between inputs between inputs between inputs Input Voltage±140V DC Inc.Pk AC@ ±170V DC Inc.Pk AC@ ±700V DC Inc.Pk AC@ 20:1 or 100V RMS10:1 or 50V RMS100:1 or 400V RMS Maximum Differential± 1,400VDC Inc. Pk AC ± 1,400VDC Inc. Pk AC ± 7,000VDC Inc. Pk AC 200:1 or 1,000V RMS100:1 or 500V RMS1,000:1 or 5,000V RMS Output Voltage± 7V minimum 2KΩload± 7V minimum 2KΩload± 7V minimum 50KΩload Offset (typical)<± 5mV -10° C to + 40° C Common Mode± 1,400V DC Inc. Pk AC ± 1,400V DC Inc. Pk AC ± 7,000V DC Inc. Pk AC or 1,000V RMS or 1,000V RMS or 2,500V RMS Noise (typical)0.7mV RMS 0.7mV RMS 0.9mV RMS Output Source Impedance1Ω@ 1kHz. 8Ω@1 MHz1Ω@ 1kHz. 8Ω@1 MHz50Ω Operating Temperature-10° C to + 40° C (14°F to 104°F) Power Requirements 4 AA cell or 6V main adapters: DC/600mA or DC/800mA Power Supply Not included Input Leads45 cm double insulated 45 cm double insulated 60 cm double insulated PVC terminated in PVC terminated inRubber terminated 44 mm safety plugs 44 mm safety plugsin sprung hooks IEC1010CAT IIICATIIICATII SPECIFICATIONS The Value Leader™ Oscilloscope Probe Specifications FAQ Can TPI oscilloscope probes be used with Tektronix and Hewlett Packard scopes? Yes, TPI oscilloscope probes can be used with most major brands of scopes. Why is selecting a probe with the correct bandwidth important? Choosing a probe with the correct bandwidth enables you to use your scope to its full potential. Why do TPI oscilloscope probes have a compensation range and compensation adjustment? Since the input of every oscilloscope is different our probes have a compensation adjustment so the capacitance of the probe can be adjusted to match the capacitance of the scope input. The compensation range is the range of adjustment available. Matching probe and scope capacitance is important to prevent waveform distortion. Differential Probe Specifications What is the benefit of a probe with X1 and X10 switchable attenuation? Passive X10 probes allow you to read a signal 10 times the amplitude of that viewed with a X1 probe. Example: an eight-division graticule on 5V/Div setting would display a 40 volt peak-to-peak signal using the X1 setting. You can view a 400 volt signal using the X10 setting. What is readout? Readout is an activator pin that protrudes out of the BNC connector of an X10 or X100 probe that completes a circuit. There are contacts around the BNC connector on the front of the oscilloscope and the attenuation is automatically set. If your scope does not have contacts around the BNC connector, it does not need this feature. What probe should I buy? Select a probe that is at least the same bandwidth as the oscilloscope you intend to use; however, for optimum performance, select a probe with two times the bandwidth of your test instrument. SPECIFICATIONS FAQ What can you measure with a differential probe? With 20 MHz bandwidth, a switchable attenuation of 20:1, and 200:1 (part no. ADF25), you can measure high-voltage circuits, motor speed controls, power supply design, and high-power electronic converters. What comes in the probe set? You will receive one differential probe, 2 probe tips, and 2 retractable sprung probes for accessing small wires for measurements. Why is common rejection ratio (CMMR) important for differential probes? CMMRis a measure of how well a differential probe will reject signals common to both test points, leaving the desired signal to be displayed by the scope What does the maximum differential voltage specification tell me? This specification provides you with the maximum voltage between the inputs the differential probe can be subjected to. This is important because the maximum voltage should never be exceeded. What is input impedance? Impedance is a measure of how much a signal will be restricted. In general, it is best to have high resistance and low capacitance to ensure signal quality, accuracy of tests, and to ensure the probe doesn’t load down the circuit under test. DIFFERENTIALPROBES OSCILLOSCOPEPROBES ModelBandwidthAttenuationCableInput ImpedanceMax Input VRiseCompensationReadoutIEC1010 LengthR LDC + peak ACTimeRange IP SERIES, SWITCHABLE IP06060MHzx11.5M1Meg 200pF150V6ns20 ~ 45 pFNACAT II x1010Meg 22pF300V IP250250MHzx11.5M1Meg 200pF150V1.5ns10 ~ 60pFNACAT II x1010Meg 22pF300V SP SERIES, SWITCHABLE SP 60B60MHzx11.2M1Meg 47pF150V5.8ns10 ~ 30pFNACAT II x1010Meg 18pF300V SP 100B100MHzx11.2M1Meg 47pF150V3.5ns10 ~ 35pFNACAT II x1010Meg 16pF300V SP150B150MHzx11.2M1Meg 47pF150V2.3ns10 ~ 35pFNACAT II x1010Meg 15pF300V SP 200B200MHzx11.2M1Meg 47pF150V1.8ns10 ~ 35pFNACAT II x1010Meg 15pF300V SP 250B250MHzx11.2M1Meg 47pF150V1.4ns10 ~ 35pFNACAT II x1010Meg 14pF300V SP 300B300MHzx11.2M1Meg 47pF150V1.1ns10 ~ 35pFNACAT II x1010Meg 13pF300V NON-SWITCHABLE 1P20B15MHzx11.2M1Meg 47pF150V23nsNA P100B100MHzx101.2M10Meg 16pF300V3.5ns10 ~ 35pFNACAT II P100BR100MHzx101.2M10Meg 16pF300V3.5ns10 ~ 35pFYesCAT II P200B200MHzx101.2M10Meg 15pF300V1.8ns10 ~ 35pFNACAT II P250250MHzx1001.2M100Meg 6.5pF1,500V1.4ns10 ~ 35pFNACAT II P250R250MHzx1001.2M100Meg 6.5pF1,500V1.4ns10 ~ 35pFYesCAT II P250B250MHzx101.2M10Meg 14pF300V1.4ns10 ~ 35pFNACAT II P250BR250MHzx101.2M10Meg 14pF300V1.4ns10 ~ 35pFYesCAT II