{"product_id":"fnirsi-ds-tc3-in-handheld","title":"FNIRSI DSO-TC3 3-in-1 500kHz Handheld Oscilloscope","description":"\u003ch2\u003eFNIRSI DSO-TC3 3-in-1 500kHz Handheld Oscilloscope\u003c\/h2\u003e\n\u003cp\u003eThe FNIRSI DSO-TC3 combines three compact bench tools in one handheld device: a digital oscilloscope, a signal generator, and an automatic component tester. It is built for quick electronics checks, repair benches, education, and portable diagnostics where a full-size oscilloscope is not always practical.\u003c\/p\u003e\n\u003cp\u003eThe oscilloscope section supports 500kHz analog bandwidth, up to 10MSa\/s sampling, AC\/DC coupling, multiple trigger modes, and a 2.8-inch color display. The built-in generator provides common waveform output for simple circuit stimulation, while the transistor tester can identify and measure common components such as resistors, capacitors, diodes, transistors, MOSFETs, SCRs, and inductors.\u003c\/p\u003e\n\u003cp\u003eFor a newer handheld upgrade, compare it with the \u003ca href=\"https:\/\/openelab.io\/products\/fnirsi-dso-tc4-in-oscilloscope\" style=\"color: #00AAFF;\"\u003e\u003cstrong\u003eFNIRSI DSO-TC4 3-in-1 Oscilloscope\u003c\/strong\u003e\u003c\/a\u003e. For higher-bandwidth waveform capture, see the \u003ca href=\"https:\/\/openelab.io\/products\/fnirsi-1013d-tablet-oscilloscope-dual\" style=\"color: #00AAFF;\"\u003e\u003cstrong\u003eFNIRSI 1013D Tablet Oscilloscope\u003c\/strong\u003e\u003c\/a\u003e or the \u003ca href=\"https:\/\/openelab.io\/products\/fnirsi-1014d-digital-oscilloscope-dual\" style=\"color: #00AAFF;\"\u003e\u003cstrong\u003eFNIRSI 1014D Oscilloscope with Generator\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eFNIRSI\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eDSO-TC3\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIntegrated Functions\u003c\/th\u003e\n\u003ctd\u003eDigital oscilloscope, signal generator, transistor\/component tester\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003e2.8-inch color screen\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOscilloscope Bandwidth\u003c\/th\u003e\n\u003ctd\u003e500kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMaximum Sampling Rate\u003c\/th\u003e\n\u003ctd\u003e10MSa\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInput Coupling\u003c\/th\u003e\n\u003ctd\u003eAC \/ DC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTrigger Modes\u003c\/th\u003e\n\u003ctd\u003eAuto \/ Normal \/ Single\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eSignal Generator Output\u003c\/th\u003e\n\u003ctd\u003eSquare, sine, pulse, triangle, ramp, half-wave, full-wave, and DC output support\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGenerator Frequency Range\u003c\/th\u003e\n\u003ctd\u003e1Hz to 100kHz, waveform dependent\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eComponent Detection\u003c\/th\u003e\n\u003ctd\u003eResistor, capacitor, diode, transistor, MOSFET, SCR, inductor, and related component identification\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eResistance Measurement\u003c\/th\u003e\n\u003ctd\u003eSupports low-ohm to high-ohm resistance testing within component tester range\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCapacitance Measurement\u003c\/th\u003e\n\u003ctd\u003eSupports pF to mF-level capacitor testing within component tester range\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eInductance Measurement\u003c\/th\u003e\n\u003ctd\u003eSupports µH to H-level inductance testing within component tester range\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003eBuilt-in rechargeable lithium battery\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCharging Interface\u003c\/th\u003e\n\u003ctd\u003eUSB Type-C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eTypical Bench Role\u003c\/th\u003e\n\u003ctd\u003ePortable waveform viewing, basic signal output, and component identification\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eIntegration Notes \u0026amp; Hardware Guidance\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eUse the DSO-TC3 for low-frequency waveform inspection, quick component identification, and portable troubleshooting rather than high-bandwidth RF or fast digital bus analysis.\u003c\/li\u003e\n  \u003cli\u003eDischarge capacitors before using the component tester function to reduce measurement errors and avoid damaging the tester input.\u003c\/li\u003e\n  \u003cli\u003eUse oscilloscope mode for live circuit checks and component tester mode only after removing or isolating the component where practical.\u003c\/li\u003e\n  \u003cli\u003eUse the built-in generator for basic circuit response checks, then move to a dedicated function generator when higher precision or wider frequency range is needed.\u003c\/li\u003e\n  \u003cli\u003eFor power-path testing, the \u003ca href=\"https:\/\/openelab.io\/products\/fnirsi-fnb58-usb-voltmeter-ammeter\" style=\"color: #00AAFF;\"\u003e\u003cstrong\u003eFNIRSI FNB58 USB-C Fast Charge Tester\u003c\/strong\u003e\u003c\/a\u003e is a useful companion; for powered board bring-up, pair with the \u003ca href=\"https:\/\/openelab.io\/products\/uni-trend-ut-p1605s-60v\" style=\"color: #00AAFF;\"\u003e\u003cstrong\u003eUNI-T UTP1605S DC Bench Power Supply\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePacking List\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eFNIRSI DSO-TC3 handheld oscilloscope host × 1\u003c\/li\u003e\n  \u003cli\u003eOscilloscope probe or test lead set × 1\u003c\/li\u003e\n  \u003cli\u003eComponent test accessory set × 1\u003c\/li\u003e\n  \u003cli\u003eUSB Type-C charging cable × 1\u003c\/li\u003e\n  \u003cli\u003eUser documentation × 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat functions are built into the FNIRSI DSO-TC3?\u003c\/h3\u003e\n\u003cp\u003eIt integrates a digital oscilloscope, a signal generator, and an automatic transistor\/component tester in one handheld device.\u003c\/p\u003e\n\u003ch3\u003eWhat bandwidth does the oscilloscope mode support?\u003c\/h3\u003e\n\u003cp\u003eThe oscilloscope mode supports 500kHz bandwidth and up to 10MSa\/s sampling, suitable for low-frequency electronics checks and basic waveform inspection.\u003c\/p\u003e\n\u003ch3\u003eCan it test electronic components automatically?\u003c\/h3\u003e\n\u003cp\u003eYes. The component tester can identify and measure common parts such as resistors, capacitors, diodes, transistors, MOSFETs, SCRs, and inductors.\u003c\/p\u003e\n\u003ch3\u003eDoes the DSO-TC3 include a signal generator?\u003c\/h3\u003e\n\u003cp\u003eYes. It includes a basic signal generator with multiple waveform types and a frequency range up to 100kHz depending on waveform type.\u003c\/p\u003e\n\u003ch3\u003eIs it a replacement for a full-size bench oscilloscope?\u003c\/h3\u003e\n\u003cp\u003eNo. It is best used as a portable quick-check tool. For higher bandwidth, deeper analysis, or larger display operation, a tablet or desktop oscilloscope is a better match.\u003c\/p\u003e","brand":"FNIRSI","offers":[{"title":"Default Title","offer_id":45836620955846,"sku":"FNIRSI-DSO-TC3","price":45.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0621\/0050\/4774\/files\/media-01_f0e284e8-17b8-4571-ae86-71fb8de6ea5c.webp?v=1778725243","url":"https:\/\/openelab.io\/pl\/products\/fnirsi-ds-tc3-in-handheld","provider":"OpenELAB Technology Ltd.","version":"1.0","type":"link"}