Thanks, Allison.? I was thinking maybe 100 ohms in series with the blocking cap (to provide short circuit protection) and then 75 ohms to ground at the output of the box to recover a 50 ohm source impedance (if that really matters, which it probably doesn't).? I don't intend to intentionally short the output, but test equipment seems to get abused unintentionally at times!? But that does put a 130 ohm load on the Si5351a when feeding a 50 ohm load, which might still be a pretty low resistance for this chip to drive comfortably.
OK on the rise time thing....that makes sense.? I would like to retain short rise times as I intend to use the harmonics in the calibration application.
73,
Steve VE3SMA
