QO-100 Rx Set with selectable IF

€115.50
incl. VAT plus shipping €97.06

Not in stock, back on: 20.05.2022

SKU
QO100-RXSET2

Supply Scope

  • QO-100 PLL + Downconverter + Bias
  • QO100 modified LNB
  • 4 F connectors


With the QO-100 RxSet the manufacturer 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 IF output signal of the LNB can be set to various bands: 28, 144, 432 or 1296 MHz (solder bridge). This receive signal is fed to a suitable amateur radio 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)


The connectors towards the LNB are "F" sockets, the IF signal towards the SDR receiver is available on an SMA socket. The 10 MHz ref clock input is also an SMA socket. This reference clock input is optional, and should be supplied from a high precision 10 MHz source, for example a GPS disciplined oscillator (GPSDO) or other source. When injecting a 10 MHz reference the internal PLL is clockled by this signal instead of a quartz oscillator, the result is a much better stability and a cleaner signal due to a better signal to noise ratio.

As an alternative to this product, the QO100-RXSET is available, which uses a fixed IF of 760 MHz.

Technical Data
Product Name QO100-RxSet 2