Evaluation Kit User Manual
EV9000
3.0 Hardware
3.1
Introduction
This section describes the hardware and its adjustment.
3.2
Description
3.2.1 Functional Layout
The EV9000 motherboard is divided into functional areas as indicated in Figure 5.
Figure 5: Motherboard Functional Layout
3.2.2 Personality Plug-In Boards
The EV9000 motherboard has two complete modem circuits. Each circuit includes a modem IC
and an accompanying personality plug-in board. There are up to four capacitors on the plug-in
board which must be altered for different modem types and data rates. These four capacitors are
used in: Rx filtering, Tx filtering, and two for Rx level measurement. (The Rx level measurement
capacitors are referred to as DOC1 and DOC2 in the modem data sheets.) The locations of these
plug-ins are shown in Figure 5.
Blank plug-ins are also provided and may be populated with user selected components depending
upon desired baud rates and other circuit characteristics. Figure 2 shows the plug-in layout and
indicates each component’s function. Both through-hole and surface mount pads are provided in
each component location. For an explanation of how to make component selections, refer to the
relevant modem data sheets.
2001 Consumer Microcircuits Limited
14
UM9000/2
CMLMICRO [ CML MICROCIRCUITS ]
