Adapter TekConnect-to-75 Ohm BNC TCA75 Adapter (75 to 50 ohms): The TCA75 adapter allows Tektronix oscilloscopes with a TekConnect interface to easily access and measure 75 ohms terminated circuitry. The TCA75 attenuation factor is automatically corrected to provide the end user with correctly displayed signal magnitudes. TekConnect-to-75 ohms BNC: DC to 𕟺 GHz (instrument dependent) VSWR - 1.1:1 (26.45 dB) 75 ohms input Auto attenuation factor correction