The P7380SMA is an 8 GHz, active differential probe designed for Serial Data Analysis (SDA) compliance testing and other applications that use differential serial busses in a 50 Ω signaling environment. The SMA input connectors each terminate with an internal 50 Ω resistor. The internal 50 Ω resistors are not directly grounded, but are driven by a buffer amplifier to a common-mode DC termination voltage. The termination voltage range allows the termination voltage to be set to any value within the specified common mode voltage range of the input signal. The DC termination voltage can be supplied either externally or internally, including an automatic mode that sets the value of the termination voltage to match the input signal DC common-mode voltage. The P7380SMA probe has two selectable attenuator settings that provide a tradeoff between dynamic range and noise. The P7380SMA probe has been optimized for a clean pulse response for accurate SDA compliance testing. The probe incorporates the high-performance TekConnect interface to communicate with the host instrument. In addition to the acquired signal that is routed through the TekConnect interface, the probe also provides a full-bandwidth, inverted-phase auxiliary output. The auxiliary output can be used for additional signal analysis by connecting it to a spectrum analyzer, network analyzer, or clock recovery unit. The probe is shipped with 50 Ω termination caps connected to the three SMA input and output connectors. When you are not using the probe, leave the termination caps connected to protect the circuitry from damage. Always leave the Auxiliary output connector terminated when not in use, to provide the best signal fidelity for the main probe output.