Friday, May 1, 2015 the Ham Video transmitter on board the Columbus module of the International Space Station was powered on and started transmitting in “Blank Transmission” (BT) mode.
In this mode, the transmitter is operated without camera. The digital TV signal is fully formatted, but the content of the video is black and the content of the audio is at zero level. From a technical perspective, the BT signal is all that is needed for testing and fine tuning ground stations.
The European network of chained ground stations is presently nearly complete. Six ground stations span the continent in “X” formation. For each ascending pass over Europe, four stations provide about ten minutes of solid copy and the same is true for descending passes:
Read Full Article:
ARRL has reintroduced the popular title Experimental Methods in RF Design as a classic reprint edition. Immerse yourself in the communications experie... Read more
For seven days from May 28 through June 3, average daily sunspot numbers dropped from 56.1 the previous week to 34.3. Average daily solar flux barely... Read more
Yes an international group of amateurs is descending onto the Kingdom of Tonga for the last two weeks of February 2016. This trip encompasses the ARRL... Read more
While trying to figure out SDRPlay’s fancy Radio Spectrum Processor (a software defined receiver) I came across the most unusual transmission on... Read more