St Down-Converter - RF Central RFX-RMR Operator's Manual

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7.1 1 Down-converter
The first down-converter is mounted as shown in the photograph in section 4
The RF signal enters the receiver unit via a standard 'N type' connector on the rear of the unit. The
unit contains a local oscillator, which tunes according to an offset appropriate to the receiver operating
frequency and is controlled by the front panel push button display system. The output frequency of the
first down-converter is 630MHz.
Mixer
BP filter
LNA
nd
630MHz to 2
RF input
Down-conv input
LO
Front panel display
VCO/PLL
RF frequency control
RMR RX
st
1 Down-converter
41
RFX-RMR Issue 1.0 page 17 of