Spectravue software

Added new FFT sizes and new overlap mode. Fixed Marker bug. Maintenence release to fix some bugs. New KHz BW mode. A couple minor features added. Added mouse scroll wheel support. Fixed problem with SDR setup menu not updating correctly. Adjustable Demodulator filters, new BMP graphics saving modes, squelch controlled screen and file writes, bug fixes, new installer.

Added Auto Start and File chaining. Return To Home Page. SpectraVue Program Full Install. SDR Interface Spec. SourceForge Link. WaveVue Utility Program. When the Funcube is entering non linear mode it is no longer possible to measure a small increase in noise power at the input. I leave all the settings from the Funcube standard, perhaps one could select less gain in the Funcube but I have chosen to use an external attenuator to be sure that my Funcube is not entering compression.

The IF bandwidth of the transverter is limited to several MHz and the total power level entering the Funcube will not get it into compression.

Hope it's clear that this large IF bandwidth can cause compression in the Funcube. Even if the noise floor showing on the Spectravue screen is at the same level, the Funcube has to deal with 23 dB more input power on its input.

So when using high gain, which I prefer, you better limit the IF bandwidth to the Funcube or the other option use an external attenuator. Set Spectravue in continuum mode for noise measurements. Be sure that the Funcube is well in its linear mode, if you use a step attenuator and increase the signal by 10 dB the display level should also increase by 10 dB.

If the displayed level on Spectravue is increasing less than 10 dB there is a good possibility the Funcube is out of its linear mode. You should add extra attenuation, but also check if the noise floor rises by at least 20 dB if you turn on the pre-amp.

Turning the antenna to a cold sky spot and then turning it to the moon or sun will give a rise of measured noise level. With my small setup a 50 cm dish I have 3.

VO Satellite Captures. Here is a capture of the AO40 passband showing an unusual interfering signal tuning across the middle beacon. The discretesteps would indicate a synthesized source.

Also the signal gets modulated by the beacon when it is close to it. This was captured by AA4RC's station. Audio wave file of the above exchange K emexchange. The DRM signal is a 10KHz wide digitally modulated that has a very rectangular shape as seen in the spectral view.