As ogden mentioned the pictures are identical . But lets analyze the picture , you have set the voltage per devision at 20mV/d , which way too low .The only reason to be at this setting is to measure ripple of power supplies , AC content of DC signals , or just small signals in general . The noise you see on the scope is due to all the electronic devises emit some kind of Electro magnetic interference in the enviroment . The picture is perfectly normal to me . If you have time I advice you to read the manual , you will be suprised how many interesting information and handy guide there is .
- Best way to check functionality is to use the reference generator on the scope . Just hook up your probes , click autoset button , and you have to see a square wave signal 1V 1khz or similiar.