p11.14, Fig 11.14 lower left corner. U4 is a MSA0385, not a MSA0685.
(23Mar06)
p11.19, Fig 11.17. The local oscillator signal is split with a
2 Way 90 degree hybrid rather than the 0 degree splitter shown.
The schematic, Fig 11.14 on p 11.14 is correct. (2Feb06)