"Greetings everyone, I have just uploaded a new "beta"-version of Spectrum Lab to my website.
Most important for those who have this radio: SL now natively supports PERSEUS, a direct sampling receiver "made in Italy" by Microtelecom, covering 10 kHz to 30 MHz, or 40 MHz without the preselector. You can download the new SpecLab (version 2.71 build 8) from here: http://dl4yhf.ssl7.com/speclab/install_speclab_beta.zip Beware: The PERSEUS support in Spectrum Lab is in a very early development stage. At least, on my own PC (notebook with 1.8 GHz Intel dual core), it works even at PERSEUS' highest sampling rate: 1 MSample/second of I/Q data, giving a usable bandwidth of 800 kHz - at the expense of a high CPU load. For most "narrow band" applications, use 125 kSamples/second. More info on how to run SpecLab with PERSEUS is in the manual, look for html\perseus.htm after installation (you will need to install the *latest* Perseus USB drivers from the original PERSEUS CDROM, and copy a few other files which are *not* part of the SpecLab installation). Furthermore, there is a new function called "Spectrum Playback". It can be used to make data in the spectrogram buffer audible, using an inverse FFT to transform the FFT-chunks back into the time domain; with optional filtering and pitch shift. So you can actually listen to the signals you see on the waterfall screen, as often as you like. To use it, first mark the region of interest in the spectrogram (hold left mouse button pressed to drag the red marker frame), then select the function "Replay from Spectrum Buffer" in the popup menu which appears. There is an extra control panel for this function; click the "Help" button in it to find more details. Any suggestions and test reports are welcome. Best regards, Wolf DL4YHF ."
