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SECTION 4.0
GENERAL INFORMATION
4.1 SCOPE OF THIS MANUAL
This manual is intended to inform a qualified transmitter operator or technician of the normal
operating and maintenance procedures for the CMX25. It is not intended to be a course of
instruction for unqualified personnel.
4.2 OPERATION OVERVIEW
The CMX25 is an integrated system with band switching capability for the frequency range
required for operation. With the CMX25 in Low Band (BAND 1) mode of operation, the input
RF signal is directed by RF Relays to the Band 1 PA and Driver section which in then to the
output. With the CMX25 in the High Band ( BAND 2 ) mode of operation, the input signal is
directed by RF Relays to the Band 2 PA and Driver section which in then to the output. Both
bands utilize only one input and output connector with the signal routed internally by RF Relays.
Refer to Figure 2.0, the System Block Diagram, for an illustration of the CMX25 band swiching
.
FIGURE 2.0
SYSTEM BLOCK DIAGRAM
