A novel method and apparatus for conditioning an analog signal before it is input to a downstream device such as a delta-sigma analog-to-digital converter is disclosed. By ordering the channel assignment in each of the interfering cells according to a pattern, for example, according to the distance from a base station, the mobile stations will become paired on the same channel in a manner to reduce interference between them. This also applies to the pixel 100b. One flows positively or negatively pressurized blood through the blood flow tubing, with the result that the pressure of the blood is communicated through the aqueous solution and the air volume in the branch connection tubing to the pressure transducer unit, with the blood being spaced from the air volume.