MOTM

a) you can't measure the White Noise output with a DVM. For one, the noise 
bandwidth is like 250Khz, and your DVM goes to 500Hz if you are lucky. Second, 
by definition white noise has an *average value of zero volts*. In fact, 1 
'figure of merit' of just how "white" the white noise is, is to measure it with 
an *averaging* (not RMS) meter. The closer to zero, the 'better the noise' :)

b) the S/H uses *pink noise* internally, through the switched jack. If you did 
not wire the switching jack correctly, this would explain it.

c) do you have approx 8V pk-pk of Pink Noise at the Pink Out jack? If not, then 
there is an error with the Pink Noise filter.

Paul S.