Strange sweeping tone that rotates between 2800 to 2900 and 2817 to 2900 kHz. It has a very strong signal here.
Here is a screenshot with the waterfall slowed down a bit
http://solarix.org/images/2800_2900_sweeper.jpg
Here is a screenshot with the waterfall slowed down a bit
http://solarix.org/images/2800_2900_sweeper.jpg