OK so I lowered the clock speed and now the clock looks much much nicer!
I hooked up a Cool Audio V3205V to the clock signals and various supplies. I am wondering, what would be the most simple test circuit for this? I could not figure out what output is expected at the two outputs (why there are two?). Currently they output a DC voltage. Another question, can I simply input, say, a 1Vppk 1KHz signal biased to 0.5Vdc and expect to see a delayed signal? This far it did not work very well... I made sure the input is indeed as I wrote it (after adjust a signal source that is optimized for a 50 Ohm load).