Maxon Electronics Australia Pty. Ltd. MM-5100P ユーザーズマニュアル
FCC Documentation
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7. Description of frequency determining and stabilizing circuitry
Frequency synthesizing part is composed of the first local RX IF synthesizer which is single mode
PLL synthesizer and the internal Tx IF and Rx IF synthesizer which are in RFT3100 and IFR3300
chip. These parts generate the first local oscillation frequency, Rx IF frequency and Tx IF frequency.
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First local frequency Synthesizer : 1372.08 MHz ~ 1419.54 MHz
PLL loop is composed of single PLL synthesizer, Loop filter, VCO and VC-TCXO
It generates transmission and reception frequency of 9551372.08 MHz ~ 1419.54 MH
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Rx IF synthesizer : 367.2 MHz
Rx IF PLL loop is consisted of PLL synthesizer in the PLL module, VCO built in IFR3300, loop
filter and VC-TCXO(Crystal oscillator 19.2 MHz). It oscillates twice the intermediate receiving
frequency of 367.2 MHz and then generates 183.6 MHz, Rx IF frequency.
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Tx IF Synthesizer : 267.2 MHz
The configuration of PLL loop is composed of PLL Synthesizer, VCO which is internally installed,
loop filter and VC-TCXO(19.2 MHz). It oscillates twice of the transmission intermediate
frequency of 267.2 MHz and then generates Tx IF frequency of 138.6 MHz through the PLL loop.
The frequency of 19.2 MHz generated from the VC-TCXO is the main clock of each the frequency
synthesizer part. PLL frequency stability is determined by the stability of oscillator of VC-TCXO. This
prevents maximum frequency variation from exceeding ±2.0PPM.