For oscilloscope probe connections, which is better: BNC or SMA connectors?

Q: For oscilloscope probe connections, which is better: BNC or SMA connectors?

A: If the test frequency is ≤3GHz (e.g., general digital signals, low-frequency analog signals), select the BNC series—they are cost-effective and easy to plug/unplug, suitable for universal oscilloscope probes, with a VSWR of ≤1.3 and signal attenuation of ≤0.3dB/100m. If the frequency is ＞3GHz (e.g., RF signals, microwave signals), choose the SMA series (operating frequency ≤10GHz, VSWR ≤1.2); its low loss ensures undistorted waveforms, making it ideal for high-frequency probes (e.g., 10GHz active probes).