Table 2: Summary of the properties of the B03 receiver. The noise reported in the last column is for a frequency of 1 Hz and is the average noise of all the detectors at that frequency.

Freq.		 Bandwidth $\char93 $detectors Beam FWHM NET $_{\rm CMB}$

145 GHz		 45 GHz 8 $9.95^{\prime}$ 170 $\mu \rm K\!\sqrt{s}$
245 GHz 80 GHz 4 $6.22^{\prime}$ 320 $\mu \rm K\!\sqrt{s}$
345 GHz 100 GHz 4 $6.90^{\prime}$ 450 $\mu \rm K\!\sqrt{s}$

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