[Discuss-gnuradio] Suggestions regarding a frequency reference

[David P. Reed]

In interfacing a  new 5 GHz up/downconverter to the USRP (my summer 
project), I find that I need a 40 MHz frequency reference to drive a PLL 
in the chip.   My first prototype will interface using the Basic Rx/Tx 
daughterboards, and it occurs to me that I can probably use one of the 
DAC clocks for that.

Should this work? Any other suggestions (at this stage I'd prefer to use 
an existing, programmable source on the USRP, rather than another chip 
and crystal)?