The minitiouner will not, as far as I know tune down to 71MHz. Plan is to up-convert to a higher frequency that the minitiouner can cope with better. It uses an ADE11+ mixer and a PGA103+ to provide some amplification if needed. I have added lots of pads to the board to allow flexible use with different filter designs e.g. low pass, high pass, band pass, band stop, all pass, no pass which would allow it to be used as a down-converter, a filtered preamp etc. Good RF design principles have largely been ignored so it's not going to work at very high frequencies.
The LO +7dBm comes from whatever, e.g. the ADF4351 as used in the Portsdown, or an SI571.
Is anyone else interested in this sort of thing or is it just me?
Who is online
Users browsing this forum: No registered users and 1 guest