4.5 Motherboard
The motherboard is the large board in the upper chassis interconnecting the audio processor/
stereo generator board or the optional receiver module to the RF exciter and metering circuits.
The motherboard provides the interconnections for this boards, eliminating the need for a wir-
ing harness, and provides input/output filtering. The RF exciter and Metering circuits are an
integral part of the motherboard and are no longer separate boards as in past transmitter de-
signs.
Also contained on the motherboard is the +5.00 volt reference and the composite drive Op
amp and its associated circuitry.
The motherboard has configuration jumpers associated with different options that can be
added at the time of order or at a later time as an upgrade. The motherboard configuration
chart for these jumpers can be found on the following page.
Illustration 4–5 Motherboard Configuration Jumpers
Configuration
Jumpers
4-8 FM600 User’s Manual
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