DxPatrol QO-100 Rx Set, IF 740 MHz

DXpatrol offers a modified LNB plus a power supply and a 25 MHz clock source. The LNB used to have two outputs. One of the outputs was modified to act as an input for a 25 MHZ reference local oscillator clock. This greatly improces the frequency stability, as required for narrow band signales. The output signal of the LNB is a 740 MHz after down conversion. This receive signal is fed to a suitable recceiver, for example the DXPatrol SDR.

The PLL/Bias-T component has the following functions:

Supply of the LNB with the operationg voltage (Bias-T)
Impedance matching from 75 Ohm (LNB) to 50 Ohm (SDR UHF receiver)
25 MHz oscillator clock to modified LNB
Optional 10 MHz input for external precision clock source (GPSDO or similar)