Electronic Boards - Motorola MICOM-3F Service Manual

16.8 MHz

5-5. Electronic Boards

The circuitry of the basic MICOM-3 radio is located on three main boards, as follows:
•
Low RF and Digital (LORD) board
•
High-Power board
•
Control Head board (two versions with similar characteristics are used, one for MICOM-3F and
MICOM-3T, and the other for MICOM-3R).
Note
Figure 5-9 identifies the main boards and Table 5-1 indicates the location of the main radio circuits.
5-10
frequency range = 352.4-369.4 MHz
resolution step = 10 KHz
PLL
VCO 4
10 KHz
356.4-368.4 MHz
Figure 5-8. Second Injection Block Diagram
MICOM-3T also uses an Interconnection board for connection to the Control
Head board.
Figure 5-9. Identification of Main MICOM-3 Boards
frequency range = 44.05-46.15 MHz
resolution step = 1.25 KHz
DIVIDER
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Cat. No. 6886859J01