This utility 'rtl_sdr_panorama.exe' designed for panoramic imaging spectrum REALTIME any (reasonable) band by accumulating within 0.5 second spectral samples of limited bandwidth for simultaneous monitoring (speed via USB, usually within 2...3 MHz) c DVB- chip based RTL-2832/R820 (13...1864 MHz).
Controlled parameters:
1. Dongle Phone system.
2. Initial scan, Hz.
3. Endpoint scan, Hz .
4. Spacing scanning ediitsy tens kHz/MHz.
5. Noise level, dB.
6. Magnitude clock frequency correction, ppm.
Announcement on the resource http://www.rtl-sdr.com/new-rtl-sdr-panoramic-spectrum-analyzer/
New driver RTL-SDR http://lists.osmocom.org/pipermail/osmocom-sdr/2014-August/001353.html