Before making a wide deployment, we should also test the latest noisemon circuit for downconversion.

1. Measure the noise output with no DAC signal
2. Measure the noise output with 0.1x the reference DAC signal (low noise ETM drive)
3. Drive a line at high frequency in addition to the reference signal
4. adjust the ampltiudes of the high frequency drive and the reference signal independently and look at how the 20-100 Hz noise changes.