The circuit in Figure 1 includes a plethora of termination options. The figure shows four results using various combinations of component values, each observed at the point indicated by the purple arrow. In the first three results, resistor R_2 is replaced with a 0Ω short, and resistor R_3 is not installed. This is a classic series-terminated approach using only resistor R_1, having values of 33, 18, and 4-7Ω, respectively.
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