By Roger J A Duthie, on 4 April 2012
Apologies for the long delay in posts to this blog. We have had a good numbre of people asking about the status of the project, and it’s about time we fessed up to what we’re doing this end.
Firstly, not a lot in relation to the Prospero recontact attempt. Though we haven’t given up. Our day jobs have been making pressing demands on our time and the Prospero project has been sidelined as a result. We’ve not been comeplete neglecting it, however.
Our custom electronics now has a custom metal box. Previously the circuitry was housed in a cardboard box wrapped in tin foil (very space-age, indeed). Also, we’ve been tackling the problem of the cross-talk we pick up on the Fun Cube Dongle (FCD). The idea of having a filter about the desired (Prospero downlink) frequency on the input wsan’t sufficient. The filter in this case allowed too wide a band and the cross-talk was still apparent in the signal. The new strategy is then to down-shift the frquencies in the signal received, filter it with a robust low-frequency pass-filtere, then up-shift the frequencies before passing it to the FCD. This is still in progress.
So, again apologies for the radio silence – we hope to have the filter set up when we have time and have another go at contact soon after.