Im using my Flex-1500 with transverters on 1,3 24 GHz. The radio and most of the transverters are locked to a 10 MHz GPS-disciplined oscillator. When working weak signals there are only very few spurious frequencies. During the last weeks there has been tropo conditions with signals in the 59 +20-30 dB range. All these signals appeared full of spurious +/- 20 kHz. As all signals was looking in the same way when exceeding S9 I decided to investigate the problem.
The pictures on http://www.oz1ff.dk/pages/flexradio.html a screen dump of a -60 dBm signal on 28,2 MHz from a clean source. Dia1 is with external reference and shows +/- 10 kHz spurious. Dia2 shows the signal with the 10 MHz reference switched off. Increasing the signal generator level to more than -40 dBm with 30 dB preamp gain overloads the receiver. But that is as specified. The level from the external 10 MHz source is +2 dBm and sine wave. The external reference is essential for weak signal work. I dont expect this to be a software problem. Any suggestions for a solution to this annoying problem? Vy 73 de OZ1FF - Kjeld Phone +45 7352 6050 SMS +45 4021 1119 Skype oz1ff-1 <mailto:[email protected]> mailto:[email protected] <http://www.oz1ff.dk/> http://www.oz1ff.dk _______________________________________________ FlexRadio Systems Mailing List [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flexradio.com/ Homepage: http://www.flexradio.com/
