Rytech

I am not sure if you will be able to acheive the precision required for tuning using digital pots or D/A converters since there may be an issue of fine tuning the frequency. I seriously recommend the PLL fractional-N synth approach so that you can numerically get the frequency you desire. Moreover, it is not difficult to program the device to a particular frequency. You could build the entire CCIR frequency table as divisors and set the frequency by channel.

Of course, this may be overkill for a one-off solution where you just need to get something done; fast.

Jerson