Codan Radio Communications VT-3-150-SN User Manual
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Enhanced AM/FM Synthesizer Instruction Manual OS(R/T)-3(A/H) 29 - 470 MHz
Frequency Band: 118 - 159.4 MHz, AM Multichannel OS-3H1xx Analog Board
• OST-3A128
- installed in AM transmitter, 118 - 138 MHz RF output.
• OSR-3A149
- installed in AM receiver, 139.4 - 159.4 MHz RF output.
Frequency Band: 128 - 174 MHz, Common OS-3H1xx Analog Board
• OST-3H141
- installed in FM transmitter, 128 - 152.6 MHz RF output.
• OST-3H162
- installed in FM transmitter, 150 - 174 MHz RF output.
• OSR-3H141
- installed in FM receiver, 128 - 152.6 MHz RF output.
• OSR-3H162
- installed in FM receiver, 150 - 174 MHz RF output.
Frequency Band: 406 - 470 MHz, Common OS-3H4xx Analog Board
• OST-3H418
- installed in FM transmitter, 406 - 430 MHz RF output.
• OST-3H460
- installed in FM transmitter, 450 - 470 MHz RF output
• OSR-3H440
- installed in FM receiver, 427.4 - 451.4 MHz RF output.
All OS-3A/H Enhanced Synthesizer Modules, regardless of the frequency band, use the same
digital PCB and mechanical construction
digital PCB and mechanical construction
.
There are, however, significant differences between the
various models when it comes to the analog PCB
.
There are four different analog PCBs, designed
to cover the four frequency bands of 29 - 50 MHz, 118 - 159.4 MHz, 128 - 174 MHz and
406 - 470 MHz
406 - 470 MHz
.
Each model’s specific sub-band of operation within a given frequency band is
determined through SELECT components on the corresponding analog board.