What's the best way to turn the LTC1799 on/off (to cut down EMI)

This is a military application and we need to hold the LTC1799 and the LTC6900 off until needed.  The datasheet gives good information on start-up, but is there a more efficient way to turn either off without just turning power on/off.  It appears that if you openup the SET pin (infinite resistance) that the oscillator should shut off, however, if it would throw random pulses out in the that condition, that's not good either.

Thanks...Steve

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