Our High Performance Amateur Radio Converters with external 10 MHz reference.
Our “high performance converters” are characterized by their use of an external 10 MHz reference. The local oscillator is phase locked to the external, customer supplied, 10 MHz reference. The use of a highly accurate, frequency stable and low phase noise 10 MHz reference permits the converters use in EME, weak signal WSJT, over the horizon, meteor scatter communications and satellite communication modes.
Borrowing from our commercial PLL signal source capability, the local oscillator also exhibits exceptional phase noise and spurious performance.
Using SAW filters and combline filters, we can achieve excellent image rejection which will provide optimum performance in high out of band signal environments.
The use of pHEMT MMICs offer sub-1dB noise figures. With their superior P1dB performance, in-band intermodulation performance is improved.
The 10 MHz input circuit also includes a sharp 10 MHz crystal filter which acts to clean up spurious signals and improve phase noise of the external reference.