User manual

ECE 477 Final Report Spring 2004
and digital sections separated so that as little noise as possible passes between them. In addition
to the base station requirements, the remote unit layout is intended to reduce the overall size of
the device. This should help minimize weight and reduce total package size such that it is small
enough to be comfortably held in the user’s hand. The -15V inverting power supply is placed
near the display where it is required and is placed as far as possible from the RF section. This
should reduce most of the excess EMI from the switching supply. Finally, the user control
buttons are connected to a header and they should be laid out separately from the rest of the
device. This allows the switches to remain in the fixed shape as intended, while still being
removed from the main PCB by simply cutting off this section.
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