A FET device for operation at high voltages includes a substrate, a first well and a second well within the substrate that are doped with implants of a first type and second type, respectively. Embedding is accomplished at such low inaudible levels by modifying an embedded signaling encoder with a dither generator, dither adder and dither subtracter that generates, adds and subtracts dither signals, of equal magnitude, to audio signals at specified bit rates. Power-on and load sensors within each intelligent power module are able to report the power status of each network appliance to the SNMP network manager with MIB variables in response to GET commands. The mapping is arranged to produce an average on-axis luminance which is dependent mainly on the main image pixel data and an average off-axis luminance which is dependent at least to some extent on the side image pixel data. Sensors are embedded in the blood filter on the cartridge to measure the pressure of blood or other fluids in the filter. The deficiencies addressed can include phase shift and attenuation compensation.