Some time ago i purchased a second hand Oscilloscope 60 MHz HM605, HAMEG. Its sat for a few months, in the last few days I've powered it up. It was purchased as fully working, and i think it is. Just a couple of issues I'm unsure about, my first test with the scope was just low voltage AC from a linear transformer. It displays the wave form on both channels, but there is a persistent flicker of the wave form. I've tried to find out if this is normal to flicker when testing, the only reference i could find was on a forum, and the conclusion was its normal as the phosphor used in the crt tube. I'm a noob when it comes to scopes, but did view a few tutorials, and setting up a scope. The second issue is i can not get the built in test function to display a wave form, upon trying to use it.
Thanks for reading, and help appreciated.