GE OPTIMA MR360 Service Training page 148

The Mega Switch can be divided into ten modules:
1. RF Router: It is a multi-way switch, which routes the four RF inputs to one RF outputs.
2. Loopback Interface: It is used to distribute loopback signal from Exciter to all receive
chain for R1 calibration and diagnostics.
3. Mixer Module: It amplifies the input RF signal according to R1 gain and transform its
frequency to 16MHz.
4. Driver Module Interface: It is the interface to supply the DC bias, DC power to coils and
other control signals.
5. RRX Interface: It communicates with the RRX by outputting the 16MHz RF signals and
receiving control signal from RRX.
6. CPLD: It provides the interface of the control signals.
7. SRI3 Interface: It communicates with SRI by transferring Coil ID and other control and
status signals.
8. Clock Interface: It filters the clock signal and makes some transformation,, then sends
the clock signal to RRX.
9. TNS (Transient Noise Suppressor): It receives noise from outside antenna and compares
with threshold and output control signal to RRX.
10. Power Interface: It regulates one DC Voltage from Regulator Box for internal using. A
power supervisor monitors the regulated power. Other DC Voltages are transferred to
RRX directly.
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