Tektronix TPA-BNC TekVPI Interface Adapter

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Tektronix TPA-BNC TekVPI Interface Adapter

Product Overview

TPA-BNC Adapter enables existing TekProbe® interface products (active, differential, high-voltage, current, and optical probes) to be used with the newest generation of Tektronix oscilloscopes which feature the TekVPI™ probe interface architecture. Existing TekProbe-BNC probe types simply plug into the TPA-BNC adapter which is then plugged directly into any channel of an oscilloscope equipped with the TekVPI probe interface. The TPA-BNC adapter recognizes and supplies the necessary power and serial communication and offset control as used by the connected TekProbe product accessory.

Note: Tektronix probe types using a BNC connection, or a BNC connection with a single analog encoding pin for attenuation factor detection connect directly to the oscilloscope’s TekVPI probe interface and do not require a TPA-BNC adapter.

TekProbe is a probe interface architecture introduced in 1986, and used on many earlier models of Tektronix oscilloscopes including the TDS300, TDS400, TDS500, TDS600, TDS700, TDS3000/B/C, TDS5000/B, and TDS7000 Series. In addition to coupling the signal from the probe to the oscilloscope, the TekProbe interface provides power and offset control to active probes. It also allows the oscilloscope to sense the probe’s attenuation scale factor and/or probe type.

Power Requirements:

  • TPA-BNC is powered directly from oscilloscopes with the TekVPI probe interface


    • Bandwidth: DC to >3 GHz
    • VSWR: <1.23:1 up to 3 GHz
    • RF Insertion Loss: <0.25 dB
    • Delay Time: 245 ps
    • Maximum Input Signal Voltage: 42 Vpk-pk, 30 VRMS, 60 VDC
    • Enables Existing TekProbe Products to Connect to the TekVPI Probe Interface of the new DPO4000 and DPO7000 Series Oscilloscopes
    • An Easy-to-use Plug-on Adapter to the Oscilloscope's TekVPI Interface
    • Provides Necessary Power, Communication, and Offset Control as Needed by the Attached TekProbe Product
    • Provides Over-current and Thermal Overload Protection for the Attached TekProbe Product
    • Provides an LED Probe Status Indicator which Identifies that the Probe has Powered-up Successfully

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