Microwave networks CM7, User Manual

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Microwave Networks
CM 100Base-T System User’s Manual 5/02/05 Page 2-3
RF Modules
The following sections provide a brief description of the RF components. The radio
cabinet is configured so that the primary (A) side modules seat on the left, and redundant
(B) modules seat on the right. Changes to the waveguide branching network and module
configuration establish the radio protection method.
Table 2-A lists RF module requirements for available radio configurations. Figure 2-1
illustrates a protected RF section of the radio cabinet.
Branching Waveguide The waveguide branching network is the interconnection of the RF signal between the
antenna and the transmit and receive RF filters.Waveguide fastens to the back cover of
the radio.
Table 2-A lists the four branching network configurations available on the CM radio.
Figures 2-3 to 2-6 provide simplified block diagrams of these RF configurations.
F-1207
RF IN
RXU
AGC MON
RF LPBK
LO FREQ
ADJ
LPBK LO IN
IF OUT
RX ALM
GND
LO MON
TX LO OUT
OFF
RF OUT
TXU
TX MON
TX LO IN
TX ALM
TX POWER ADJ
IF IN
LPBK LO OUT
RF IN
RXU
AGC MON
RF LPBK
LO FREQ
ADJ
LPBK LO IN
IF OUT
RX ALM
GND
LO MON
TX LO OUT
OFF
RF OUT
TXU
TX MON
TX LO IN
TX ALM
TX POWER ADJ
IF IN
LPBK LO OUT
Figure 2-1. RF Shelf; Hot-Standby TX/RX and Hot-Standby TX/Space
Diversity RX