See the Expedition 25 Crew Arrive Home on NASA TV

Monday, 22 November 2010 16:59 by G7EIX

As a few of you have spoken to Expedition 25 Commander Doug Wheelock on 2m over the past month, I thought you may be interested in the following NASA News.

You can view the events described below on NASA TV or on the Web at: http://www.nasa.gov/ntv

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For more information, visit: http://www.nasa.gov/station

NEW SDR Receiver from WINRADIO available now

Monday, 22 November 2010 16:44 by G7EIX

The WiNRADiO WR-G31DDC 'EXCALIBUR' is a high-performance, low-cost, direct-sampling, software-defined, shortwave receiver with a frequency range from 9 kHz to 50 MHz It includes a real-time 50 MHz-wide spectrum analyzer and 2 MHz-wide instantaneous bandwidth available for recording, demodulation and further digital processing.

http://www.winradio.com/home/g31ddc.htm

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The WR-G31DDC software provides an elegant and logical user interface. There are several spectrum analyzer configurations including the 50 MHz full span with 1.5 kHz resolution. The fully-zoomable display can be viewed in either the standard or waterfall mode.

The down-converted portion is highlighted and can be selected either via keyboard or by the mouse cursor and then displayed in another window, within which three independent receiver channels can exist. For any channel, the receiver's selectivity, IF shift, passband tuning, notch, and other functions can be adjusted, and the audio spectrum of the demodulated signal can be observed.

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